diff --git a/src/App.css b/src/App.css
index 9b502bcf..277e6556 100644
--- a/src/App.css
+++ b/src/App.css
@@ -23,14 +23,14 @@
   font-family: var(--font-mono, monospace);
   background: var(--color-bg);
   border: 1px solid var(--color-border);
-  border-radius: 3px;
+  border-radius: var(--radius-xs);
   padding: 0.1em 0.35em;
   font-size: 0.88em;
 }
 .md pre {
   background: var(--color-bg);
   border: 1px solid var(--color-border);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   padding: 0.75rem 1rem;
   overflow-x: auto;
   margin: 0.6em 0;
@@ -101,7 +101,7 @@
   padding: 1.25rem;
   margin-bottom: 3px;
   background: var(--color-surface);
-  border-radius: 12px 12px 0 0;
+  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
 }
 
 .dump-header-block {
@@ -128,7 +128,7 @@
 
 .dump-title {
   margin: 0;
-  font-size: 1.5rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
   line-height: 1.25;
   word-break: break-word;
@@ -139,7 +139,7 @@
   display: inline-flex;
   align-items: center;
   gap: 0.4rem;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   max-width: 100%;
   /* Padding gives the hover box breathing room (incl. right of the pencil);
      the matching negative margin keeps the title's visual position unchanged. */
@@ -156,12 +156,12 @@
 }
 
 .dump-title-edit-btn {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   line-height: 1;
   flex-shrink: 0;
   color: var(--color-text-muted);
   opacity: 0;
-  transition: opacity 0.1s;
+  transition: opacity var(--dur-fast);
   pointer-events: none;
 }
 
@@ -183,12 +183,12 @@
 .playlist-edit-input,
 .playlist-edit-textarea {
   border: 2px solid var(--color-border);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   background: var(--color-bg);
   color: var(--color-text);
   font-family: inherit;
   outline: none;
-  transition: border-color 0.2s;
+  transition: border-color var(--dur-slow);
 }
 
 .dump-title-input:focus,
@@ -202,14 +202,14 @@
   flex: 1;
   min-width: 12rem;
   padding: 0.4rem 0.6rem;
-  font-size: 1.25rem;
+  font-size: var(--text-xl);
   font-weight: 700;
 }
 
 .dump-title-error {
   width: 100%;
   margin: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-danger);
 }
 
@@ -234,7 +234,7 @@
 }
 
 .dump-comment {
-  font-size: 1.05rem;
+  font-size: var(--text-base);
   line-height: 1.72;
   opacity: 0.85;
   border-left: 3px solid var(--color-accent);
@@ -246,7 +246,7 @@
 .dump-rich-content {
   padding: 1.25rem;
   background: var(--color-surface);
-  border-radius: 0 0 12px 12px;
+  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
 }
 
 .dump-url-link {
@@ -254,7 +254,7 @@
   word-break: break-all;
   padding: 1rem;
   border: 2px solid var(--color-border);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   width: 100%;
   box-sizing: border-box;
 }
@@ -268,9 +268,9 @@
 .dump-actions a {
   color: var(--color-text);
   text-decoration: none;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   opacity: 0.7;
-  transition: opacity 0.15s, color 0.15s;
+  transition: opacity var(--dur-base), color var(--dur-base);
 }
 
 .dump-actions a:hover {
@@ -299,7 +299,7 @@
 }
 
 .form-label {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-weight: 600;
   opacity: 0.6;
 }
@@ -317,7 +317,7 @@
   border: none;
   padding: 0;
   cursor: pointer;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   color: var(--color-text);
   opacity: 0.6;
@@ -337,17 +337,17 @@
   width: 100%;
   box-sizing: border-box;
   padding: 0.65rem 1rem;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   border: 2px solid var(--color-border);
   background-color: var(--color-bg);
   color: var(--color-text);
-  font-size: 1rem;
+  font-size: var(--text-base);
   font-family: var(--font-body);
   font-optical-sizing: auto;
   font-weight: 400;
   font-style: normal;
   line-height: 1.5;
-  transition: border-color 0.2s, box-shadow 0.2s, background-color 0.2s;
+  transition: border-color var(--dur-slow), box-shadow var(--dur-slow), background-color var(--dur-slow);
   outline: none;
 }
 
@@ -391,7 +391,7 @@
 }
 
 .form-hint {
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   opacity: 0.7;
   margin-top: 0.1rem;
 }
@@ -420,12 +420,12 @@
   background: none;
   border: none;
   cursor: pointer;
-  font-size: 1rem;
+  font-size: var(--text-base);
   line-height: 1;
   color: var(--color-muted);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   padding: 0.4rem;
-  transition: color 0.15s;
+  transition: color var(--dur-base);
 }
 
 .dump-create-title-edit-btn:hover {
@@ -434,7 +434,7 @@
 
 .dump-create-title {
   margin: 0;
-  font-size: 1.4rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
 }
 
@@ -444,7 +444,7 @@
 .dump-create--drag {
   outline: 2px dashed var(--color-accent);
   outline-offset: 6px;
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
 }
 
 .dump-create-draft,
@@ -456,8 +456,8 @@
   flex-wrap: wrap;
   margin-bottom: 0.9rem;
   padding: 0.55rem 0.75rem;
-  border-radius: 8px;
-  font-size: 0.85rem;
+  border-radius: var(--radius-lg);
+  font-size: var(--text-sm);
 }
 
 .dump-create-draft {
@@ -494,7 +494,7 @@
 /* Not reached, or reached with nothing worth showing. */
 .preview-note {
   margin: 0;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   color: var(--color-text-secondary);
 }
 
@@ -503,13 +503,13 @@
   display: flex;
   gap: 0.6rem;
   padding: 0.65rem 0.8rem;
-  border-radius: 9px;
+  border-radius: var(--radius-lg);
   background: color-mix(in srgb, var(--color-accent) 9%, transparent);
   border: 1px solid color-mix(in srgb, var(--color-accent) 35%, transparent);
 }
 
 .dump-duplicate-icon {
-  font-size: 1rem;
+  font-size: var(--text-base);
   line-height: 1.3;
   opacity: 0.8;
 }
@@ -523,12 +523,12 @@
 
 .dump-duplicate-lead {
   margin: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-weight: 600;
 }
 
 .dump-duplicate-link {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   overflow: hidden;
   text-overflow: ellipsis;
   white-space: nowrap;
@@ -537,7 +537,7 @@
 .dump-duplicate-more,
 .dump-duplicate-hint {
   margin: 0;
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   color: var(--color-text-secondary);
 }
 
@@ -556,7 +556,7 @@
   align-items: center;
   gap: 0.4rem;
   min-width: 0;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   color: var(--color-text-muted);
 }
 
@@ -576,9 +576,9 @@
   width: 1.35rem;
   height: 1.35rem;
   flex-shrink: 0;
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   border: 1.5px solid var(--color-border-subtle);
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   font-weight: 700;
   line-height: 1;
 }
@@ -647,7 +647,7 @@
 /* One line naming the thing the second panel's choices apply to. */
 .dump-panel-recap {
   margin: 0;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   color: var(--color-text-muted);
   overflow: hidden;
   text-overflow: ellipsis;
@@ -659,7 +659,7 @@
   display: flex;
   background: var(--color-bg);
   border: 1.5px solid var(--color-border);
-  border-radius: 9px;
+  border-radius: var(--radius-lg);
   padding: 3px;
   gap: 2px;
 }
@@ -667,14 +667,14 @@
 .visibility-toggle button {
   flex: 1;
   padding: 0.3rem 0.9rem;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   border: none;
   background: transparent;
   color: var(--color-text);
   cursor: pointer;
-  font-size: 0.88rem;
+  font-size: var(--text-sm);
   font-weight: 600;
-  transition: background 0.15s, color 0.15s;
+  transition: background var(--dur-base), color var(--dur-base);
   white-space: nowrap;
 }
 
@@ -690,10 +690,10 @@
 /* ── FileDropZone ── */
 .fdz {
   border: 2px dashed var(--color-border-subtle);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   background: var(--color-surface);
   cursor: pointer;
-  transition: border-color 0.15s, background 0.15s;
+  transition: border-color var(--dur-base), background var(--dur-base);
   outline: none;
 }
 
@@ -735,13 +735,13 @@
 
 .fdz__hint {
   margin: 0;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-weight: 500;
 }
 
 .fdz__browse {
   margin: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-text-secondary);
 }
 
@@ -753,7 +753,7 @@
 
 .fdz__limit {
   margin: 0.25rem 0 0;
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
 }
 
@@ -765,7 +765,7 @@
 }
 
 .fdz__file-icon {
-  font-size: 1.5rem;
+  font-size: var(--text-2xl);
   flex-shrink: 0;
 }
 
@@ -778,7 +778,7 @@
 }
 
 .fdz__file-name {
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-weight: 600;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -786,7 +786,7 @@
 }
 
 .fdz__file-size {
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
 }
 
@@ -796,10 +796,10 @@
   border: none;
   cursor: pointer;
   color: var(--color-text-muted);
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   padding: 0.3rem 0.5rem;
-  border-radius: 4px;
-  transition: color 0.12s, background 0.12s;
+  border-radius: var(--radius-sm);
+  transition: color var(--dur-fast), background var(--dur-fast);
   line-height: 1;
 }
 
@@ -811,7 +811,7 @@
 /* ── Upload progress (second panel, while the file is being sent) ── */
 .dump-upload-progress {
   height: 4px;
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-border-subtle);
   overflow: hidden;
 }
@@ -819,9 +819,9 @@
 .dump-upload-progress-fill {
   height: 100%;
   width: 0;
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-accent);
-  transition: width 0.2s ease-out;
+  transition: width var(--dur-slow) ease-out;
 }
 
 /* Length unknown, or the body is sent and the server is still thinking. */
@@ -848,14 +848,14 @@
   width: 100%;
   max-height: 320px;
   object-fit: contain;
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   background: var(--color-bg);
   display: block;
 }
 
 .preview-loading {
   margin: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   opacity: 0.5;
   font-style: italic;
 }
@@ -863,7 +863,7 @@
 /* File previews (Dump page) */
 .file-preview-image {
   max-width: 100%;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   display: block;
 }
 
@@ -875,7 +875,7 @@
   background: #000;
   cursor: pointer;
   display: block;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   overflow: hidden;
 }
 
@@ -887,7 +887,7 @@
 }
 
 .file-preview-play-btn .rich-content-play-overlay {
-  font-size: 3rem;
+  font-size: var(--text-display);
 }
 
 .audio-file-preview {
@@ -901,7 +901,7 @@
     var(--color-surface) 92%
   );
   border: 2px solid var(--color-border);
-  border-radius: 0 0 12px 12px;
+  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
 }
 
 /* When active, brighten only the *un-played* bars. Excluding played bars keeps
@@ -918,7 +918,7 @@
 /* ── Video player ── */
 .video-player {
   width: 100%;
-  border-radius: 0 0 12px 12px;
+  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
   overflow: hidden;
   border: 2px solid var(--color-border);
   position: relative;
@@ -989,7 +989,7 @@
     var(--color-accent) 8%,
     var(--color-surface) 92%
   );
-  border-radius: 0 0 12px 12px;
+  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
   border: 2px solid var(--color-border);
   width: 100%;
   box-sizing: border-box;
@@ -1009,7 +1009,7 @@
   display: grid;
   place-items: center;
   padding: 0.45rem;
-  transition: background 0.15s, transform 0.1s;
+  transition: background var(--dur-base), transform var(--dur-fast);
 }
 
 .audio-player-btn:hover {
@@ -1024,7 +1024,7 @@
 }
 
 .audio-player-time {
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   font-variant-numeric: tabular-nums;
   opacity: 0.6;
   flex-shrink: 0;
@@ -1035,7 +1035,7 @@
   flex: 1;
   min-width: 48px;
   height: 4px;
-  border-radius: 2px;
+  border-radius: var(--radius-xs);
   background: color-mix(
     in srgb,
     var(--color-accent) 20%,
@@ -1064,7 +1064,7 @@
   flex: 1;
   min-width: 0;
   height: 48px;
-  border-radius: 3px;
+  border-radius: var(--radius-xs);
   background: color-mix(
     in srgb,
     var(--color-accent) 12%,
@@ -1080,7 +1080,7 @@
   inset: 0 auto 0 0;
   background: var(--color-accent);
   opacity: 0.45;
-  transition: width 0.1s linear;
+  transition: width var(--dur-fast) linear;
 }
 
 /* Audio whose peaks can't be decoded (cross-origin streams). Boxed to the
@@ -1098,7 +1098,7 @@
   inset: 50% 0 auto 0;
   transform: translateY(-50%);
   height: 6px;
-  border-radius: 3px;
+  border-radius: var(--radius-xs);
   background: color-mix(
     in srgb,
     var(--color-accent) 12%,
@@ -1110,8 +1110,8 @@
   bottom: auto;
   transform: translateY(-50%);
   height: 6px;
-  border-radius: 3px;
-  z-index: 1;
+  border-radius: var(--radius-xs);
+  z-index: var(--z-raised);
 }
 
 .audio-player-track--volume {
@@ -1123,7 +1123,7 @@
   position: absolute;
   inset: 0 auto 0 0;
   background: var(--color-accent);
-  border-radius: 2px;
+  border-radius: var(--radius-xs);
   pointer-events: none;
 }
 
@@ -1157,7 +1157,7 @@
   place-items: center;
   padding: 0;
   opacity: 0.55;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
 }
 
 .audio-player-vol-btn:hover {
@@ -1174,7 +1174,7 @@
   width: 100%;
   height: 80vh;
   min-height: 600px;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   border: 2px solid var(--color-border);
   display: block;
 }
@@ -1185,11 +1185,11 @@
   gap: 0.5rem;
   padding: 0.75rem 1.5rem;
   border: 2px solid var(--color-accent);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   color: var(--color-accent);
   text-decoration: none;
   font-weight: 500;
-  transition: background 0.15s, color 0.15s;
+  transition: background var(--dur-base), color var(--dur-base);
 }
 
 .file-download-link:hover {
@@ -1199,16 +1199,16 @@
 
 .dump-file-notice {
   margin: 0 0 0.25rem;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   opacity: 0.8;
 }
 
 .rich-content-card {
   display: flex;
   border: 2px solid var(--color-border);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   overflow: hidden;
-  transition: border-color 0.2s;
+  transition: border-color var(--dur-slow);
 }
 
 .rich-content-card:has(.rich-content-body:hover) {
@@ -1261,21 +1261,21 @@
   transform: translateX(-50%);
   width: calc(100% - 2.5rem);
   max-width: 860px;
-  z-index: 1000;
+  z-index: var(--z-modal);
   background: var(--color-surface);
   border: 2px solid var(--color-border);
-  border-radius: 10px;
-  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 2px 8px rgba(0, 0, 0, 0.3);
+  border-radius: var(--radius-xl);
+  box-shadow: var(--shadow-3);
   animation: player-enter 0.25s cubic-bezier(0.34, 1.56, 0.64, 1) both;
-  transition: opacity 0.2s ease, box-shadow 0.2s ease;
+  transition: opacity var(--dur-slow) ease, box-shadow var(--dur-slow) ease;
 }
 .global-player--reduced {
   opacity: 0.6;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
+  box-shadow: var(--shadow-2);
 }
 .global-player--reduced:hover {
   opacity: 1;
-  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 2px 8px rgba(0, 0, 0, 0.3);
+  box-shadow: var(--shadow-3);
 }
 @keyframes player-enter {
   from {
@@ -1294,7 +1294,7 @@
 .global-player-title {
   flex: 1;
   font-weight: 600;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   white-space: nowrap;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -1318,7 +1318,7 @@ a.global-player-title:hover {
 .global-player-media-wrap {
   overflow: hidden;
   min-height: 0;
-  border-radius: 0 0 8px 8px;
+  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
 }
 
 /* Inside the global player the shell already draws the border — drop the
@@ -1360,7 +1360,7 @@ a.global-player-title:hover {
   flex: none;
 }
 .global-player-subtitle {
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   white-space: nowrap;
   overflow: hidden;
@@ -1371,7 +1371,7 @@ a.global-player-title:hover {
   height: 36px;
   flex: none;
   object-fit: cover;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
 }
 .global-player-transport {
   display: flex;
@@ -1380,7 +1380,7 @@ a.global-player-title:hover {
   flex: none;
 }
 .global-player-position {
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   font-variant-numeric: tabular-nums;
   white-space: nowrap;
@@ -1392,7 +1392,7 @@ a.global-player-title:hover {
 .global-player-status {
   margin: 0;
   padding: 0 1rem 0.5rem;
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
 }
 
@@ -1414,7 +1414,7 @@ a.global-player-title:hover {
   border-left: 3px solid transparent;
   color: inherit;
   font: inherit;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   text-align: left;
   cursor: pointer;
 }
@@ -1448,7 +1448,7 @@ a.global-player-title:hover {
   text-align: center;
   padding: 1rem;
   color: var(--color-text-muted);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
 }
 
 body.has-player {
@@ -1478,7 +1478,7 @@ body.has-player {
     0px));
   top: calc(100dvh - var(--fab-size) - 1.25rem - env(safe-area-inset-bottom,
     0px));
-  z-index: 900;
+  z-index: var(--z-fab);
   width: var(--fab-size);
   height: var(--fab-size);
   display: flex;
@@ -1498,7 +1498,7 @@ body.has-player {
   opacity: 0;
   transform: translateY(1rem) scale(0.9);
   pointer-events: none;
-  transition: opacity 0.2s ease, transform 0.2s ease, background 0.15s ease,
+  transition: opacity var(--dur-slow) ease, transform var(--dur-slow) ease, background var(--dur-base) ease,
     top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
@@ -1557,7 +1557,7 @@ body.has-fab .page-content {
     0px));
   top: calc(100dvh - var(--fab-size) * 2 - 2rem - env(safe-area-inset-bottom,
     0px));
-  z-index: 900;
+  z-index: var(--z-fab);
   width: var(--fab-size);
   height: var(--fab-size);
   display: flex;
@@ -1575,7 +1575,7 @@ body.has-fab .page-content {
   opacity: 0;
   transform: translateY(1rem) scale(0.9);
   pointer-events: none;
-  transition: opacity 0.2s ease, transform 0.2s ease, background 0.15s ease,
+  transition: opacity var(--dur-slow) ease, transform var(--dur-slow) ease, background var(--dur-base) ease,
     top 0.4s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
@@ -1639,8 +1639,8 @@ body.has-player .chat-fab {
   justify-content: center;
   background: rgba(0, 0, 0, 0.25);
   color: #fff;
-  font-size: 1.75rem;
-  transition: background 0.18s ease;
+  font-size: var(--text-3xl);
+  transition: background var(--dur-slow) ease;
 }
 
 .rich-content-thumbnail-btn:hover .rich-content-play-overlay {
@@ -1683,18 +1683,18 @@ body.has-player .chat-fab {
   display: inline-block;
   background: var(--color-accent);
   color: var(--color-on-accent);
-  font-size: 0.7rem;
+  font-size: var(--text-2xs);
   font-weight: 700;
   letter-spacing: 0.04em;
   padding: 0.15rem 0.5rem;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   align-self: flex-start;
 }
 
 .rich-content-title {
   margin: 0;
   font-weight: 600;
-  font-size: 1rem;
+  font-size: var(--text-base);
   line-height: 1.35;
   overflow-wrap: break-word;
   word-break: break-word;
@@ -1715,14 +1715,14 @@ body.has-player .chat-fab {
 
 .rich-content-description {
   margin: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   opacity: 0.75;
   -webkit-line-clamp: 2;
   line-clamp: 2;
 }
 
 .rich-content-url {
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   opacity: 0.5;
   white-space: nowrap;
   overflow: hidden;
@@ -1752,13 +1752,13 @@ body.has-player .chat-fab {
   width: 36px;
   height: 36px;
   object-fit: cover;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   border: 1px solid var(--color-border);
   display: block;
 }
 
 .rich-content-compact-icon {
-  font-size: 1rem;
+  font-size: var(--text-base);
   opacity: 0.6;
 }
 
@@ -1788,13 +1788,13 @@ body.has-player .chat-fab {
   gap: 0.3rem;
   padding: 0.25rem 0.6rem;
   border: 2px solid var(--color-border);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   background: transparent;
   color: var(--color-text);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-weight: 600;
   cursor: pointer;
-  transition: border-color 0.15s, background 0.15s, color 0.15s;
+  transition: border-color var(--dur-base), background var(--dur-base), color var(--dur-base);
   white-space: nowrap;
   flex-shrink: 0;
   font-variant-numeric: tabular-nums;
@@ -1856,7 +1856,7 @@ body.has-player .chat-fab {
   align-items: center;
   flex-wrap: wrap;
   gap: 0.25rem 0.5rem;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   opacity: 0.7;
 }
 
@@ -1898,7 +1898,7 @@ body.has-player .chat-fab {
   border: 2px dashed var(--color-border);
   background: var(--color-bg);
   color: var(--color-text);
-  font-size: 1.5rem;
+  font-size: var(--text-2xl);
   opacity: 0.4;
   box-sizing: border-box;
 }
@@ -1908,12 +1908,12 @@ body.has-player .chat-fab {
   inset: 0;
   background: var(--color-overlay);
   color: var(--color-on-accent);
-  font-size: 1.1rem;
+  font-size: var(--text-lg);
   display: flex;
   align-items: center;
   justify-content: center;
   opacity: 0;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
 }
 
 .img-picker:hover .img-picker-overlay,
@@ -1932,13 +1932,13 @@ body.has-player .chat-fab {
   border-radius: 50%;
   background: var(--color-overlay);
   color: var(--color-on-accent);
-  font-size: 1.1rem;
+  font-size: var(--text-lg);
   display: flex;
   align-items: center;
   justify-content: center;
   opacity: 0;
   cursor: pointer;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
 }
 
 .profile-avatar-wrapper:hover .avatar-change-overlay {
@@ -2051,7 +2051,7 @@ body.has-player .chat-fab {
 
   .profile-columns .dump-card-title {
     flex: 1 0 100%;
-    font-size: 0.9rem;
+    font-size: var(--text-md);
     line-height: 1.3;
     display: -webkit-box;
     -webkit-box-orient: vertical;
@@ -2078,7 +2078,7 @@ body.has-player .chat-fab {
 
   .profile-columns .dump-card-date,
   .profile-columns .dump-card-comment-count {
-    font-size: 0.72rem;
+    font-size: var(--text-2xs);
   }
 
   .profile-columns .dump-card-categories {
@@ -2087,12 +2087,12 @@ body.has-player .chat-fab {
 
   .profile-columns .dump-card-category-chip {
     padding: 0.05rem 0.4rem;
-    font-size: 0.68rem;
+    font-size: var(--text-2xs);
   }
 
   .profile-columns .vote-btn {
     padding: 0.15rem 0.45rem;
-    font-size: 0.78rem;
+    font-size: var(--text-xs);
   }
 }
 
@@ -2105,7 +2105,7 @@ body.has-player .chat-fab {
 .empty-state {
   margin: 0;
   opacity: 0.5;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
 }
 
 /* ── Profile section header (shared between bare h2 and wrapper div) ── */
@@ -2137,17 +2137,17 @@ body.has-player .chat-fab {
 
 .profile-username {
   margin: 0;
-  font-size: 1.25rem;
+  font-size: var(--text-xl);
   font-weight: 600;
 }
 
 /* Role badge — elevated roles only (see RoleChip) */
 .profile-role-chip {
   padding: 0.1rem 0.55rem;
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-accent);
   color: var(--color-on-accent);
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   font-weight: 700;
   text-transform: uppercase;
   letter-spacing: 0.04em;
@@ -2175,8 +2175,8 @@ body.has-player .chat-fab {
 .profile-description-view {
   position: relative;
   padding: 0.5rem 0.6rem;
-  border-radius: 6px;
-  font-size: 0.95rem;
+  border-radius: var(--radius-md);
+  font-size: var(--text-md);
 }
 
 .profile-description-view--editable {
@@ -2203,10 +2203,10 @@ body.has-player .chat-fab {
   position: absolute;
   top: 0.55rem;
   right: 0.5rem;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-muted);
   opacity: 0;
-  transition: opacity 0.1s;
+  transition: opacity var(--dur-fast);
   pointer-events: none;
 }
 
@@ -2224,11 +2224,11 @@ body.has-player .chat-fab {
   display: inline-flex;
   align-items: center;
   gap: 0.35rem;
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   margin: 0.1rem 0 0.4rem;
   cursor: pointer;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   padding: 0.1rem 0.2rem;
   margin-left: -0.2rem;
 }
@@ -2251,8 +2251,8 @@ body.has-player .chat-fab {
 .profile-email-input {
   width: min(260px, 100%);
   padding: 0.35rem 0.6rem;
-  border-radius: 6px;
-  font-size: 0.85rem;
+  border-radius: var(--radius-md);
+  font-size: var(--text-sm);
   line-height: 1.5;
 }
 
@@ -2267,14 +2267,14 @@ body.has-player .chat-fab {
   justify-content: center;
   height: 1.75rem;
   padding: 0 0.65rem;
-  border-radius: 5px;
+  border-radius: var(--radius-sm);
   border: 1.5px solid;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-family: inherit;
   font-weight: 500;
   cursor: pointer;
   box-sizing: border-box;
-  transition: background 0.15s, border-color 0.15s, color 0.15s;
+  transition: background var(--dur-base), border-color var(--dur-base), color var(--dur-base);
 }
 
 .profile-email-btn--save {
@@ -2311,7 +2311,7 @@ body.has-player .chat-fab {
 }
 
 .profile-invited-by {
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   margin: 0.15rem 0 0.4rem;
 }
@@ -2344,12 +2344,12 @@ body.has-player .chat-fab {
 .invite-btn {
   padding: 0.3rem 0.9rem;
   border: 1.5px solid var(--color-accent);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   background: transparent;
   color: var(--color-accent);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   cursor: pointer;
-  transition: background 0.15s, color 0.15s;
+  transition: background var(--dur-base), color var(--dur-base);
 }
 .invite-btn:hover {
   background: var(--color-accent);
@@ -2363,7 +2363,7 @@ body.has-player .chat-fab {
   max-width: 480px;
 }
 .invite-url {
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   font-family: var(--font-mono, monospace);
   color: var(--color-text-muted);
   flex: 1;
@@ -2372,7 +2372,7 @@ body.has-player .chat-fab {
   white-space: nowrap;
   background: var(--color-surface);
   border: 1px solid var(--color-border-subtle);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   padding: 0.35rem 0.6rem;
 }
 /* Always-visible copy target. Sits first so it's the obvious tap. */
@@ -2381,13 +2381,13 @@ body.has-player .chat-fab {
   flex-shrink: 0;
   padding: 0.2rem 0.65rem;
   border: 1px solid var(--color-border-subtle);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   background: transparent;
   color: var(--color-text);
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   cursor: pointer;
   white-space: nowrap;
-  transition: background 0.12s;
+  transition: background var(--dur-fast);
 }
 .invite-copy-btn:hover {
   background: var(--color-accent);
@@ -2398,7 +2398,7 @@ body.has-player .chat-fab {
 /* ── Profile sub-pages (dumps / upvoted / playlists) ── */
 .profile-subpage-back {
   display: inline-block;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-text-muted);
   text-decoration: none;
   margin-bottom: 0.75rem;
@@ -2417,7 +2417,7 @@ body.has-player .chat-fab {
 
 .profile-subpage-title {
   margin: 0;
-  font-size: 1.4rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
   flex: 1;
 }
@@ -2426,7 +2426,7 @@ body.has-player .chat-fab {
 .profile-view-all {
   display: inline-block;
   margin-top: 0.75rem;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-text-muted);
   text-decoration: none;
 }
@@ -2442,13 +2442,13 @@ body.has-player .chat-fab {
   justify-content: center;
   padding: 0.3rem 0.9rem;
   border: 1.5px solid var(--color-border);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   background: transparent;
   color: var(--color-text-muted);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-family: inherit;
   cursor: pointer;
-  transition: border-color 0.15s, color 0.15s, background 0.15s;
+  transition: border-color var(--dur-base), color var(--dur-base), background var(--dur-base);
 }
 
 .btn-border:hover {
@@ -2470,8 +2470,8 @@ body.has-player .chat-fab {
   background: var(--color-danger-bg);
   color: var(--color-text);
   padding: 0.7rem 1rem;
-  border-radius: 8px;
-  font-size: 0.9rem;
+  border-radius: var(--radius-lg);
+  font-size: var(--text-md);
 }
 
 .error-card-icon {
@@ -2487,7 +2487,7 @@ body.has-player .chat-fab {
 
 .error-card-title {
   margin: 0;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   font-weight: 700;
 }
 
@@ -2510,7 +2510,7 @@ body.has-player .chat-fab {
   width: calc(100% - 2rem);
   padding: 0.75rem 1rem;
   border: none;
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   background: var(--color-danger-bg);
   color: var(--color-text);
   line-height: 1.5;
@@ -2519,7 +2519,7 @@ body.has-player .chat-fab {
 }
 
 .app-header-status strong {
-  font-size: 0.95rem;
+  font-size: var(--text-md);
 }
 
 .page-error-wrap {
@@ -2581,7 +2581,7 @@ body.has-player .chat-fab {
 }
 
 .app-header-brand {
-  font-size: 1.15rem;
+  font-size: var(--text-lg);
   font-weight: 700;
   letter-spacing: -0.01em;
   flex-shrink: 0;
@@ -2683,7 +2683,7 @@ body.has-player .chat-fab {
   display: inline-flex;
   align-items: center;
   justify-content: center;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   font-family: inherit;
   line-height: 1;
 }
@@ -2715,9 +2715,9 @@ body.has-player .chat-fab {
   border: none;
   color: inherit;
   text-decoration: none;
-  font-size: 1rem;
+  font-size: var(--text-base);
   cursor: pointer;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
 }
 
 .nav-search-btn:hover {
@@ -2755,11 +2755,11 @@ body.has-player .chat-fab {
   text-decoration: none;
   color: var(--color-text);
   font-weight: 600;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   padding: 0.35rem 0.85rem;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   background: var(--color-header-user-bg);
-  transition: background 0.15s;
+  transition: background var(--dur-base);
 }
 
 .app-header-user:hover {
@@ -2776,10 +2776,10 @@ body.has-player .chat-fab {
   align-items: center;
   background: transparent;
   border: none;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   padding: 0.25rem;
   cursor: pointer;
-  transition: background 0.15s;
+  transition: background var(--dur-base);
 }
 
 .user-menu-trigger:hover {
@@ -2793,24 +2793,24 @@ body.has-player .chat-fab {
   min-width: 150px;
   background: var(--color-surface);
   border: 2px solid var(--color-border-subtle);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   padding: 0.35rem;
   display: flex;
   flex-direction: column;
   gap: 0.15rem;
-  z-index: 100;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
+  z-index: var(--z-sticky);
+  box-shadow: var(--shadow-2);
 }
 
 .user-menu-item {
   display: block;
   padding: 0.45rem 0.75rem;
-  border-radius: 7px;
+  border-radius: var(--radius-md);
   text-decoration: none;
   color: var(--color-text);
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-weight: 600;
-  transition: background 0.12s;
+  transition: background var(--dur-fast);
 }
 
 .user-menu-item:hover {
@@ -2824,13 +2824,13 @@ body.has-player .chat-fab {
   overflow-y: auto;
   background: var(--color-surface);
   border: 2px solid var(--color-border-subtle);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   padding: 0.35rem;
   display: flex;
   flex-direction: column;
   gap: 0.15rem;
-  z-index: 100;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
+  z-index: var(--z-sticky);
+  box-shadow: var(--shadow-2);
 }
 
 .user-list-popover-item {
@@ -2838,12 +2838,12 @@ body.has-player .chat-fab {
   align-items: center;
   gap: 0.5rem;
   padding: 0.35rem 0.5rem;
-  border-radius: 7px;
+  border-radius: var(--radius-md);
   text-decoration: none;
   color: var(--color-text);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-weight: 600;
-  transition: background 0.12s;
+  transition: background var(--dur-fast);
 }
 
 .user-list-popover-item:hover {
@@ -2853,7 +2853,7 @@ body.has-player .chat-fab {
 .user-list-popover-status {
   margin: 0;
   padding: 0.5rem 0.6rem;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
 }
 
@@ -2862,7 +2862,7 @@ body.has-player .chat-fab {
   border: none;
   cursor: pointer;
   padding: 0.4rem 0.6rem;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   color: var(--color-accent);
   text-align: left;
@@ -2883,20 +2883,20 @@ body.has-player .chat-fab {
   gap: 1.25rem;
   background: var(--color-surface);
   border: 2px solid var(--color-border);
-  border-radius: 12px;
+  border-radius: var(--radius-xl);
   padding: 2rem;
 }
 
 .auth-card-title {
   margin: 0;
-  font-size: 1.5rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
   text-align: center;
 }
 
 .auth-card-footer {
   text-align: center;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   opacity: 0.7;
   margin: 0;
 }
@@ -2930,7 +2930,7 @@ body.has-player .chat-fab {
 }
 
 .auth-reset-sent {
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   text-align: center;
   margin: 0;
   opacity: 0.85;
@@ -2964,19 +2964,19 @@ body.has-player .chat-fab {
     grid-column: 1 / -1;
   }
   .form-page--two-col .dump-edit-preview {
-    border-radius: 0 0 0 12px;
+    border-radius: 0 0 0 var(--radius-xl);
   }
   /* Higher specificity than the generic `.form-page .form` below so the
      form's bottom-left stays square where it meets the preview. */
   .form-page.form-page--two-col .form {
-    border-radius: 0 0 12px 0;
+    border-radius: 0 0 var(--radius-xl) 0;
   }
 }
 
 .form-page-header {
   padding: 1.25rem;
   background: var(--color-surface);
-  border-radius: 12px 12px 0 0;
+  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
   display: flex;
   flex-direction: column;
   gap: 0.2rem;
@@ -2984,7 +2984,7 @@ body.has-player .chat-fab {
 
 .form-page-eyebrow {
   margin: 0;
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   text-transform: uppercase;
   letter-spacing: 0.07em;
@@ -2993,7 +2993,7 @@ body.has-player .chat-fab {
 
 .form-page-title {
   margin: 0;
-  font-size: 1.4rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
   word-break: break-word;
 }
@@ -3002,7 +3002,7 @@ body.has-player .chat-fab {
   padding: 1.25rem;
   background: var(--color-surface);
   overflow: hidden;
-  border-radius: 0 0 12px 12px;
+  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
 }
 
 .dump-edit-refresh {
@@ -3011,7 +3011,7 @@ body.has-player .chat-fab {
 
 .dump-edit-refresh-error {
   margin-top: 0.5rem;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-danger);
 }
 
@@ -3023,7 +3023,7 @@ body.has-player .chat-fab {
 
 .form-page .form {
   background: var(--color-surface);
-  border-radius: 0 0 12px 12px;
+  border-radius: 0 0 var(--radius-xl) var(--radius-xl);
   padding: 1.25rem;
 }
 
@@ -3051,11 +3051,11 @@ body.has-player .chat-fab {
   border: none;
   padding: 0;
   cursor: pointer;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   color: var(--color-text);
   opacity: 0.6;
   text-decoration: none;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
 }
 
 .form-cancel:hover {
@@ -3072,17 +3072,17 @@ body.has-player .chat-fab {
   gap: 0.25em;
   white-space: nowrap;
   cursor: pointer;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   font-family: inherit;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-weight: 600;
   padding: 0.4rem 1rem;
   transition:
-    background 0.15s,
-    color 0.15s,
-    border-color 0.15s,
-    box-shadow 0.15s,
-    transform 0.1s;
+    background var(--dur-base),
+    color var(--dur-base),
+    border-color var(--dur-base),
+    box-shadow var(--dur-base),
+    transform var(--dur-fast);
 }
 
 .btn-primary {
@@ -3140,11 +3140,11 @@ body.has-player .chat-fab {
   background: none;
   border: none;
   padding: 0.3rem 0.55rem;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   color: var(--color-text);
   font-family: inherit;
   opacity: 0.7;
-  transition: opacity 0.15s, background 0.15s;
+  transition: opacity var(--dur-base), background var(--dur-base);
 }
 
 .btn--ghost:hover {
@@ -3160,8 +3160,8 @@ body.has-player .chat-fab {
   border: none;
   cursor: pointer;
   line-height: 1;
-  border-radius: 4px;
-  transition: opacity 0.15s, color 0.15s;
+  border-radius: var(--radius-sm);
+  transition: opacity var(--dur-base), color var(--dur-base);
 }
 
 /* ── Index page ── */
@@ -3187,7 +3187,7 @@ body.has-player .chat-fab {
   display: block;
   flex-shrink: 0;
   margin-left: -10px;
-  transition: margin-left 0.2s ease, transform 0.2s ease;
+  transition: margin-left var(--dur-slow) ease, transform var(--dur-slow) ease;
   position: relative;
 }
 
@@ -3283,16 +3283,16 @@ body.has-player .chat-fab {
 
 .feed-sort-btn {
   padding: 0.25rem 0.8rem;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   border: 2px solid var(--color-border);
   background: transparent;
   color: var(--color-text-secondary);
   cursor: pointer;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   letter-spacing: 0.04em;
   text-transform: uppercase;
-  transition: border-color 0.15s, background 0.15s, color 0.15s;
+  transition: border-color var(--dur-base), background var(--dur-base), color var(--dur-base);
   white-space: nowrap;
   flex-shrink: 0;
 }
@@ -3344,7 +3344,7 @@ body.has-player .chat-fab {
 .dump-card,
 .playlist-card {
   border: 2px solid var(--color-border);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   background: var(--color-surface);
   min-width: 0;
 }
@@ -3359,7 +3359,7 @@ body.has-player .chat-fab {
   display: grid;
   grid-template-rows: 1fr;
   transition:
-    border-color 0.15s,
+    border-color var(--dur-base),
     grid-template-rows 0.32s ease,
     opacity 0.25s ease,
     filter 0.3s ease;
@@ -3367,7 +3367,7 @@ body.has-player .chat-fab {
 
 .playlist-card {
   position: relative;
-  transition: border-color 0.15s;
+  transition: border-color var(--dur-base);
 }
 
 /* ── Shared card inner layout ── */
@@ -3464,13 +3464,13 @@ body.has-player .chat-fab {
   display: flex;
   align-items: center;
   justify-content: center;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   overflow: hidden;
   background: var(--color-bg);
   /* Subtle matte so any unfilled space (icons, off-ratio art) reads as
      intentional framing rather than a broken bar. */
   box-shadow: inset 0 0 0 1px var(--color-border);
-  transition: transform 0.18s ease, box-shadow 0.18s ease;
+  transition: transform var(--dur-slow) ease, box-shadow var(--dur-slow) ease;
 }
 
 /* Feed thumbnails are mostly 16:9 (YouTube, og:image) — match that ratio so
@@ -3496,7 +3496,7 @@ body.has-player .chat-fab {
 /* ── Shared card preview icon ── */
 .dump-card-preview-icon,
 .playlist-card-icon {
-  font-size: 1.8rem;
+  font-size: var(--text-3xl);
   opacity: 0.7;
   line-height: 1;
 }
@@ -3540,7 +3540,7 @@ body.has-player .chat-fab {
 }
 
 .thumb-placeholder-initials {
-  font-size: 1.25rem;
+  font-size: var(--text-xl);
   font-weight: 800;
   line-height: 1;
   opacity: 0.75;
@@ -3550,15 +3550,15 @@ body.has-player .chat-fab {
 /* The initial has no intrinsic size, so scale it per surface. */
 .dump-card-preview .thumb-placeholder-initials,
 .playlist-card-preview .thumb-placeholder-initials {
-  font-size: 1.9rem;
+  font-size: var(--text-3xl);
 }
 
 .journal-card-image .thumb-placeholder-initials {
-  font-size: 2.6rem;
+  font-size: var(--text-display);
 }
 
 .rich-content-thumbnail.thumb-placeholder .thumb-placeholder-initials {
-  font-size: 3rem;
+  font-size: var(--text-display);
 }
 
 /* `.rich-content-thumbnail` sizes an <img> by width alone and lets the natural
@@ -3608,11 +3608,11 @@ body.has-player .chat-fab {
 .dump-card-title,
 .playlist-card-title {
   font-weight: 600;
-  font-size: 1rem;
+  font-size: var(--text-base);
   color: var(--color-text);
   text-decoration: none;
   word-break: break-word;
-  transition: color 0.15s;
+  transition: color var(--dur-base);
   line-height: 1.35;
 }
 
@@ -3639,7 +3639,7 @@ body.has-player .chat-fab {
 .dump-card-comment,
 .playlist-card-description {
   margin: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   opacity: 0.65;
   word-break: break-word;
   line-height: 1.4;
@@ -3658,7 +3658,7 @@ body.has-player .chat-fab {
 /* ── Shared card meta row ── */
 .dump-card-date,
 .playlist-card-meta {
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   opacity: 0.45;
   margin-top: 0.2rem;
 }
@@ -3676,7 +3676,7 @@ body.has-player .chat-fab {
 
 .dump-edited-label,
 .playlist-edited-label {
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   opacity: 0.5;
   font-style: italic;
 }
@@ -3727,12 +3727,12 @@ body.has-player .chat-fab {
 /* ── Playlist badge ── */
 .playlist-badge {
   display: inline-block;
-  font-size: 0.7rem;
+  font-size: var(--text-2xs);
   font-weight: 600;
   text-transform: uppercase;
   letter-spacing: 0.05em;
   padding: 0.1rem 0.45rem;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   background: color-mix(in srgb, var(--color-accent) 20%, transparent);
   color: var(--color-accent);
 }
@@ -3763,7 +3763,7 @@ body.has-player .chat-fab {
   right: 0.4rem;
   color: var(--color-text);
   opacity: 0;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   padding: 0.2rem 0.35rem;
 }
 
@@ -3784,7 +3784,7 @@ body.has-player .chat-fab {
   display: flex;
   align-items: center;
   justify-content: center;
-  z-index: 1000;
+  z-index: var(--z-modal);
   padding: 1rem;
 }
 
@@ -3792,8 +3792,8 @@ body.has-player .chat-fab {
 .modal-card,
 .confirm-modal {
   background: var(--color-surface);
-  border-radius: 12px;
-  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
+  border-radius: var(--radius-xl);
+  box-shadow: var(--shadow-3);
   width: 100%;
 }
 
@@ -3810,7 +3810,7 @@ body.has-player .chat-fab {
 
 .dump-create-success {
   margin-bottom: 1rem;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   color: var(--color-text-muted);
 }
 
@@ -3837,12 +3837,12 @@ body.has-player .chat-fab {
 
 .modal-title {
   font-weight: 700;
-  font-size: 1rem;
+  font-size: var(--text-base);
 }
 
 .modal-close-btn {
   color: var(--color-text);
-  font-size: 1rem;
+  font-size: var(--text-base);
   opacity: 0.6;
   padding: 0.25rem;
 }
@@ -3927,7 +3927,7 @@ body.has-player .chat-fab {
 
 /* Brief highlight when a message is jumped to via a reply reference. */
 .chat-message {
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   transition: background-color 0.4s ease;
 }
 
@@ -3953,7 +3953,7 @@ body.has-player .chat-fab {
 }
 
 .chat-day-sep-label {
-  font-size: 0.7rem;
+  font-size: var(--text-2xs);
   font-weight: 600;
   text-transform: uppercase;
   letter-spacing: 0.03em;
@@ -3974,7 +3974,7 @@ body.has-player .chat-fab {
 
 .chat-message-author {
   font-weight: 700;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: inherit;
   text-decoration: none;
 }
@@ -3984,12 +3984,12 @@ body.has-player .chat-fab {
 }
 
 .chat-message-time {
-  font-size: 0.7rem;
+  font-size: var(--text-2xs);
   color: var(--color-text-muted);
 }
 
 .chat-message-text {
-  font-size: 0.9rem;
+  font-size: var(--text-md);
 }
 
 .chat-message-text.md {
@@ -3997,7 +3997,7 @@ body.has-player .chat-fab {
 }
 
 .chat-message-edited {
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   color: var(--color-text-muted);
   opacity: 0.7;
   font-style: italic;
@@ -4011,7 +4011,7 @@ body.has-player .chat-fab {
   display: inline-flex;
   gap: 0.15rem;
   opacity: 0;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
 }
 
 .chat-message:hover .chat-message-actions,
@@ -4030,11 +4030,11 @@ body.has-player .chat-fab {
   background: none;
   border: none;
   padding: 0 0.1rem;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   line-height: 1;
   color: var(--color-text-muted);
   cursor: pointer;
-  transition: color 0.15s;
+  transition: color var(--dur-base);
 }
 
 .chat-icon-btn:hover {
@@ -4061,7 +4061,7 @@ body.has-player .chat-fab {
    bulky for the narrow message column. */
 .chat-edit-actions .btn-primary,
 .chat-edit-actions .btn-secondary {
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   padding: 0.25rem 0.7rem;
   box-shadow: none;
 }
@@ -4115,7 +4115,7 @@ body.has-player .chat-fab {
   background: none;
   border: none;
   font: inherit;
-  font-size: 0.74rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   cursor: pointer;
   text-align: left;
@@ -4139,7 +4139,7 @@ body.has-player .chat-fab {
 .chat-reply-ref-author {
   font-weight: 700;
   flex-shrink: 0;
-  transition: color 0.15s;
+  transition: color var(--dur-base);
 }
 
 .chat-reply-ref-text {
@@ -4147,7 +4147,7 @@ body.has-player .chat-fab {
   text-overflow: ellipsis;
   white-space: nowrap;
   opacity: 0.85;
-  transition: color 0.15s;
+  transition: color var(--dur-base);
 }
 
 /* ── Reply composer bar (subtle, above the input) ── */
@@ -4158,9 +4158,9 @@ body.has-player .chat-fab {
   flex-shrink: 0;
   padding: 0.35rem 0.6rem;
   border-left: 2px solid var(--color-accent);
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   background: color-mix(in srgb, var(--color-accent) 8%, transparent);
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
 }
 
@@ -4193,7 +4193,7 @@ body.has-player .chat-fab {
 .chat-reply-bar-cancel {
   margin-left: auto;
   flex-shrink: 0;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
 }
 
 /* ── "Is typing" indicator (reuses presence avatars) ── */
@@ -4203,7 +4203,7 @@ body.has-player .chat-fab {
   gap: 0.45rem;
   flex-shrink: 0;
   min-height: 1.25rem;
-  font-size: 0.76rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
 }
 
@@ -4315,7 +4315,7 @@ body.has-player .chat-fab {
 
 .confirm-modal-message {
   margin: 0;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   line-height: 1.5;
 }
 
@@ -4342,9 +4342,9 @@ body.has-player .chat-fab {
   align-items: center;
   gap: 0.75rem;
   padding: 0.6rem 0.75rem;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   cursor: pointer;
-  transition: background 0.15s;
+  transition: background var(--dur-base);
 }
 
 .playlist-membership-row:hover {
@@ -4364,7 +4364,7 @@ body.has-player .chat-fab {
 }
 
 .playlist-membership-check {
-  font-size: 1rem;
+  font-size: var(--text-base);
   color: var(--color-accent);
   width: 1.2rem;
   text-align: center;
@@ -4375,14 +4375,14 @@ body.has-player .chat-fab {
 .modal-new-item-toggle {
   background: none;
   border: 1px dashed var(--color-border-subtle);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   color: var(--color-accent);
   cursor: pointer;
   padding: 0.6rem 1rem;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   text-align: left;
   width: 100%;
-  transition: border-color 0.15s, background 0.15s;
+  transition: border-color var(--dur-base), background var(--dur-base);
 }
 
 .modal-new-item-toggle:hover {
@@ -4393,7 +4393,7 @@ body.has-player .chat-fab {
 /* ── Playlist detail page ── */
 .playlist-detail-header {
   background: var(--color-surface);
-  border-radius: 12px;
+  border-radius: var(--radius-xl);
   padding: 1.25rem;
 }
 
@@ -4408,7 +4408,7 @@ body.has-player .chat-fab {
   width: 72px;
   height: 72px;
   object-fit: cover;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   border: 1px solid var(--color-border);
 }
 
@@ -4426,13 +4426,13 @@ body.has-player .chat-fab {
 
 .playlist-detail-title {
   margin: 0;
-  font-size: 1.5rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
   word-break: break-word;
 }
 
 .playlist-detail-description {
-  font-size: 1rem;
+  font-size: var(--text-base);
   margin: 0 0 0.5rem;
   opacity: 0.75;
   line-height: 1.75;
@@ -4444,7 +4444,7 @@ body.has-player .chat-fab {
   display: flex;
   align-items: center;
   gap: 0.6rem;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   opacity: 0.6;
 }
 
@@ -4471,13 +4471,13 @@ body.has-player .chat-fab {
 .playlist-edit-btn {
   background: none;
   border: 1px solid var(--color-border-subtle);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   cursor: pointer;
   color: var(--color-text);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   padding: 0.25rem 0.7rem;
   opacity: 0.7;
-  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
+  transition: opacity var(--dur-base), border-color var(--dur-base), color var(--dur-base);
 }
 
 .playlist-edit-btn:hover,
@@ -4490,7 +4490,7 @@ body.has-player .chat-fab {
 .playlist-edit-input,
 .playlist-edit-textarea {
   width: 100%;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   padding: 0.4rem 0.65rem;
 }
 
@@ -4501,7 +4501,7 @@ body.has-player .chat-fab {
 }
 
 .playlist-edit-input {
-  font-size: 1.1rem;
+  font-size: var(--text-lg);
   font-weight: 700;
 }
 
@@ -4527,8 +4527,8 @@ body.has-player .chat-fab {
   align-items: center;
   gap: 0.5rem;
   padding: 0 0.25rem;
-  transition: background 0.15s;
-  border-radius: 12px;
+  transition: background var(--dur-base);
+  border-radius: var(--radius-xl);
 }
 
 .playlist-dump-item--drag-over {
@@ -4546,7 +4546,7 @@ body.has-player .chat-fab {
   flex-shrink: 0;
   color: var(--color-text);
   opacity: 0.4;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   padding: 0.25rem 0.35rem;
 }
 
@@ -4562,17 +4562,17 @@ body.has-player .chat-fab {
   cursor: pointer;
   color: var(--color-text);
   opacity: 0.7;
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   padding: 0.2rem 0.5rem;
-  border-radius: 4px;
-  transition: opacity 0.15s, border-color 0.15s, color 0.15s;
+  border-radius: var(--radius-sm);
+  transition: opacity var(--dur-base), border-color var(--dur-base), color var(--dur-base);
   white-space: nowrap;
 }
 
 .drag-handle {
   cursor: grab;
   opacity: 0.35;
-  font-size: 1.1rem;
+  font-size: var(--text-lg);
   flex-shrink: 0;
   user-select: none;
   padding: 0 0.25rem;
@@ -4589,14 +4589,14 @@ body.has-player .chat-fab {
   justify-content: center;
   padding: 0.25rem 0.6rem;
   border: 2px solid var(--color-border);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   background: none;
   cursor: pointer;
   color: var(--color-text);
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   white-space: nowrap;
-  transition: border-color 0.15s, color 0.15s;
+  transition: border-color var(--dur-base), color var(--dur-base);
 }
 
 .btn-add-playlist:hover {
@@ -4610,9 +4610,9 @@ body.has-player .chat-fab {
   border: none;
   cursor: pointer;
   color: var(--color-accent);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   padding: 0;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
   white-space: nowrap;
 }
 
@@ -4622,18 +4622,18 @@ body.has-player .chat-fab {
 
 /* ── Dump card comment count ── */
 .dump-card-comment-count {
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   color: var(--color-text-muted);
 }
 
 /* ── Dump card private badge ── */
 .dump-card-private-badge {
-  font-size: 0.68rem;
+  font-size: var(--text-2xs);
   font-weight: 600;
   text-transform: uppercase;
   letter-spacing: 0.04em;
   padding: 0.1em 0.45em;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   background: color-mix(in srgb, var(--color-text-muted) 18%, transparent);
   color: var(--color-text-muted);
 }
@@ -4648,7 +4648,7 @@ body.has-player .chat-fab {
 
 .comment-section-title,
 .related-section-title {
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 700;
   color: var(--color-text-muted);
   margin: 0 0 1.25rem;
@@ -4671,10 +4671,10 @@ body.has-player .chat-fab {
 
 .related-section .dump-card {
   border-width: 1px;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   background: transparent;
   opacity: 0.78;
-  transition: border-color 0.15s, opacity 0.15s;
+  transition: border-color var(--dur-base), opacity var(--dur-base);
 }
 
 .related-section .dump-card:hover {
@@ -4693,12 +4693,12 @@ body.has-player .chat-fab {
 }
 
 .related-section .dump-card-title {
-  font-size: 0.88rem;
+  font-size: var(--text-sm);
 }
 
 /* Keep just enough description to orient, but only a single muted line. */
 .related-section .dump-card-comment {
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   -webkit-line-clamp: 1;
   line-clamp: 1;
 }
@@ -4715,10 +4715,10 @@ body.has-player .chat-fab {
    tightened treatment the backlink dump cards do. */
 .collections-section .playlist-card {
   border-width: 1px;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   background: transparent;
   opacity: 0.78;
-  transition: border-color 0.15s, opacity 0.15s;
+  transition: border-color var(--dur-base), opacity var(--dur-base);
 }
 
 .collections-section .playlist-card:hover {
@@ -4737,15 +4737,15 @@ body.has-player .chat-fab {
 }
 
 .collections-section .playlist-card-icon {
-  font-size: 1.15rem;
+  font-size: var(--text-lg);
 }
 
 .collections-section .playlist-card-title {
-  font-size: 0.88rem;
+  font-size: var(--text-sm);
 }
 
 .collections-section .playlist-card-description {
-  font-size: 0.78rem;
+  font-size: var(--text-xs);
   -webkit-line-clamp: 1;
   line-clamp: 1;
 }
@@ -4775,9 +4775,9 @@ body.has-player .chat-fab {
   display: flex;
   gap: 0.75rem;
   padding: 0.75rem 0.85rem;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   background: var(--color-surface);
-  transition: background 0.12s;
+  transition: background var(--dur-fast);
 }
 
 .comment-node-inner:hover {
@@ -4807,7 +4807,7 @@ body.has-player .chat-fab {
 
 .comment-author {
   font-weight: 700;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-accent);
   text-decoration: none;
 }
@@ -4817,7 +4817,7 @@ body.has-player .chat-fab {
 }
 
 .comment-time {
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   text-decoration: none;
 }
@@ -4835,19 +4835,19 @@ body.has-player .chat-fab {
   }
 }
 .comment-node--highlight {
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   animation: comment-highlight 2s ease-out forwards;
 }
 
 .comment-edited {
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   color: var(--color-text-muted);
   opacity: 0.7;
   font-style: italic;
 }
 
 .comment-body {
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   line-height: 1.65;
   color: var(--color-text);
   overflow-wrap: break-word;
@@ -4863,13 +4863,13 @@ body.has-player .chat-fab {
 .comment-action-btn {
   background: none;
   border: 1px solid transparent;
-  border-radius: 4px;
+  border-radius: var(--radius-sm);
   padding: 0.15rem 0.45rem;
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   color: var(--color-text-muted);
   cursor: pointer;
   font-family: inherit;
-  transition: color 0.1s, border-color 0.1s, background 0.1s;
+  transition: color var(--dur-fast), border-color var(--dur-fast), background var(--dur-fast);
 }
 
 .comment-action-btn:hover {
@@ -4918,7 +4918,7 @@ body.has-player .chat-fab {
   margin-bottom: 1.5rem;
   padding: 1rem;
   background: var(--color-surface);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   border: 1px solid var(--color-border-subtle);
 }
 
@@ -4941,15 +4941,15 @@ body.has-player .chat-fab {
   box-sizing: border-box;
   background: var(--color-bg);
   border: 1px solid var(--color-border-subtle);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   padding: 0.55rem 0.75rem;
   font-family: inherit;
-  font-size: 0.875rem;
+  font-size: var(--text-sm);
   color: var(--color-text);
   resize: none;
   overflow: hidden;
   min-height: 2.4rem;
-  transition: border-color 0.15s, box-shadow 0.15s;
+  transition: border-color var(--dur-base), box-shadow var(--dur-base);
 }
 
 .comment-reply-textarea:focus {
@@ -4969,13 +4969,13 @@ body.has-player .chat-fab {
   background: var(--color-accent);
   color: #fff;
   border: none;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   padding: 0.4rem 1rem;
   font-family: inherit;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   font-weight: 700;
   cursor: pointer;
-  transition: background 0.15s, opacity 0.15s;
+  transition: background var(--dur-base), opacity var(--dur-base);
   letter-spacing: 0.02em;
 }
 
@@ -4991,14 +4991,14 @@ body.has-player .chat-fab {
 .comment-cancel-btn {
   background: transparent;
   border: 1.5px solid var(--color-border-subtle);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   padding: 0.4rem 1rem;
   font-family: inherit;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   color: var(--color-text);
   opacity: 0.6;
   cursor: pointer;
-  transition: opacity 0.15s;
+  transition: opacity var(--dur-base);
 }
 
 .comment-cancel-btn:hover {
@@ -5019,7 +5019,7 @@ body.has-player .chat-fab {
 }
 
 .comment-deleted-placeholder {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-style: italic;
   color: var(--color-text-muted);
   margin: 0;
@@ -5042,7 +5042,7 @@ body.has-player .chat-fab {
   justify-content: space-between;
   gap: 0.75rem;
   padding: 0.4rem 0.5rem;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
 }
 
 .followed-user-card-link {
@@ -5060,7 +5060,7 @@ body.has-player .chat-fab {
 }
 
 .followed-user-card-name {
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-weight: 600;
   overflow: hidden;
   text-overflow: ellipsis;
@@ -5134,7 +5134,7 @@ body.has-player .chat-fab {
   gap: 0.5rem;
   color: var(--color-text);
   text-decoration: none;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-weight: 600;
 }
 
@@ -5144,23 +5144,23 @@ body.has-player .chat-fab {
 
 .invite-tree-empty {
   color: var(--color-text-muted);
-  font-size: 0.9rem;
+  font-size: var(--text-md);
 }
 
 /* ── Follow button ── */
 .follow-btn {
   padding: 0.25rem 0.9rem;
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   border: 2px solid var(--color-accent);
   background: transparent;
   color: var(--color-accent);
   cursor: pointer;
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   letter-spacing: 0.04em;
   text-transform: uppercase;
   font-family: inherit;
-  transition: background 0.15s, color 0.15s;
+  transition: background var(--dur-base), color var(--dur-base);
 }
 
 .follow-btn:hover,
@@ -5240,23 +5240,23 @@ body.has-player .chat-fab {
   display: flex;
   flex-direction: column;
   border: 2px solid var(--color-border);
-  border-radius: 12px;
+  border-radius: var(--radius-xl);
   background: var(--color-surface);
   overflow: hidden;
   cursor: pointer;
   min-width: 0;
-  transition: border-color 0.15s, transform 0.15s, box-shadow 0.15s;
+  transition: border-color var(--dur-base), transform var(--dur-base), box-shadow var(--dur-base);
 }
 
 .journal-card:hover {
   border-color: var(--color-accent);
   transform: translateY(-2px);
-  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.18);
+  box-shadow: var(--shadow-2);
 }
 
 .journal-card-title {
   font-weight: 600;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   color: var(--color-text);
   text-decoration: none;
   line-height: 1.3;
@@ -5280,7 +5280,7 @@ body.has-player .chat-fab {
   display: flex;
   align-items: center;
   gap: 0.5rem;
-  font-size: 0.74rem;
+  font-size: var(--text-xs);
   color: var(--color-text-secondary);
   flex-wrap: wrap;
   min-width: 0;
@@ -5341,7 +5341,7 @@ body.has-player .chat-fab {
 }
 
 .journal-card--image .journal-card-comment {
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   line-height: 1.4;
   margin: 0;
   color: rgba(255, 255, 255, 0.85);
@@ -5350,13 +5350,13 @@ body.has-player .chat-fab {
 }
 
 .journal-card--feature .journal-card-title {
-  font-size: 1.25rem;
+  font-size: var(--text-xl);
   -webkit-line-clamp: 3;
   line-clamp: 3;
 }
 
 .journal-card--square.journal-card--image .journal-card-title {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
 }
 
 /* ── Quote cards — the note is the subject, on an accent wash ── */
@@ -5380,9 +5380,9 @@ body.has-player .chat-fab {
 
 .journal-card-quote-body {
   position: relative;
-  z-index: 1;
+  z-index: var(--z-raised);
   margin: 0;
-  font-size: 0.92rem;
+  font-size: var(--text-md);
   line-height: 1.45;
   color: var(--color-text);
   -webkit-line-clamp: 3;
@@ -5391,7 +5391,7 @@ body.has-player .chat-fab {
 
 .journal-card--wide.journal-card--quote .journal-card-quote-body,
 .journal-card--feature.journal-card--quote .journal-card-quote-body {
-  font-size: 1rem;
+  font-size: var(--text-base);
   -webkit-line-clamp: 2;
   line-clamp: 2;
 }
@@ -5405,7 +5405,7 @@ body.has-player .chat-fab {
 }
 
 .journal-card--quote .journal-card-title {
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   color: var(--color-text-secondary);
   -webkit-line-clamp: 1;
@@ -5423,12 +5423,12 @@ body.has-player .chat-fab {
 }
 
 .journal-card-glyph {
-  font-size: 1.5rem;
+  font-size: var(--text-2xl);
   line-height: 1;
 }
 
 .journal-card--text .journal-card-title {
-  font-size: 0.92rem;
+  font-size: var(--text-md);
   -webkit-line-clamp: 3;
   line-clamp: 3;
 }
@@ -5441,7 +5441,7 @@ body.has-player .chat-fab {
 .feed-end {
   text-align: center;
   padding: 1.5rem 1rem;
-  font-size: 0.82rem;
+  font-size: var(--text-sm);
   color: var(--color-text-secondary);
   opacity: 0.55;
 }
@@ -5513,11 +5513,11 @@ body.has-player .chat-fab {
   background: var(--color-header-user-bg);
   border: none;
   cursor: pointer;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   font-weight: 600;
   padding: 0.35rem 0.85rem;
-  border-radius: 8px;
-  transition: background 0.15s;
+  border-radius: var(--radius-lg);
+  transition: background var(--dur-base);
   display: inline-flex;
   align-items: center;
 }
@@ -5537,11 +5537,11 @@ body.has-player .chat-fab {
   right: -3px;
   background: var(--color-danger);
   color: #fff;
-  font-size: 0.6rem;
+  font-size: var(--text-2xs);
   font-weight: 700;
   min-width: 16px;
   height: 16px;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   display: flex;
   align-items: center;
   justify-content: center;
@@ -5557,11 +5557,11 @@ body.has-player .chat-fab {
   background: var(--color-header-user-bg);
   border: none;
   cursor: pointer;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
   font-weight: 600;
   padding: 0.35rem 0.85rem;
-  border-radius: 8px;
-  transition: background 0.15s;
+  border-radius: var(--radius-lg);
+  transition: background var(--dur-base);
   display: inline-flex;
   align-items: center;
 }
@@ -5586,7 +5586,7 @@ body.has-player .chat-fab {
   margin-bottom: 1.75rem;
 }
 .notifications-title {
-  font-size: 1.4rem;
+  font-size: var(--text-2xl);
   font-weight: 700;
   margin: 0;
   display: flex;
@@ -5594,15 +5594,15 @@ body.has-player .chat-fab {
   gap: 0.5rem;
 }
 .notifications-title-bell {
-  font-size: 1.2rem;
+  font-size: var(--text-lg);
 }
 .notifications-unread-pill {
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   font-weight: 700;
   background: color-mix(in srgb, var(--color-danger) 18%, transparent);
   color: var(--color-danger);
   border: 1px solid color-mix(in srgb, var(--color-danger) 35%, transparent);
-  border-radius: 12px;
+  border-radius: var(--radius-xl);
   padding: 0.2rem 0.65rem;
   white-space: nowrap;
 }
@@ -5612,7 +5612,7 @@ body.has-player .chat-fab {
   color: var(--color-text-muted);
 }
 .notifications-empty-icon {
-  font-size: 2.5rem;
+  font-size: var(--text-display);
   display: block;
   margin-bottom: 0.75rem;
   opacity: 0.5;
@@ -5621,7 +5621,7 @@ body.has-player .chat-fab {
   margin: 0.25rem 0;
 }
 .notifications-empty-hint {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   max-width: 340px;
   margin: 0.5rem auto 0 !important;
   line-height: 1.5;
@@ -5631,7 +5631,7 @@ body.has-player .chat-fab {
   margin-bottom: 2rem;
 }
 .notif-group-label {
-  font-size: 0.68rem;
+  font-size: var(--text-2xs);
   font-weight: 700;
   letter-spacing: 0.12em;
   text-transform: uppercase;
@@ -5657,10 +5657,10 @@ body.has-player .chat-fab {
 }
 .notification-item {
   background: var(--color-surface);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   border: 1px solid var(--color-border-subtle);
   border-left: 3px solid transparent;
-  transition: background 0.12s, border-color 0.12s;
+  transition: background var(--dur-fast), border-color var(--dur-fast);
   overflow: hidden;
 }
 .notification-item:hover {
@@ -5702,7 +5702,7 @@ body.has-player .chat-fab {
   display: flex;
   align-items: center;
   justify-content: center;
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   flex-shrink: 0;
 }
 .notif-icon--upvote {
@@ -5731,12 +5731,12 @@ body.has-player .chat-fab {
 }
 .notification-content {
   flex: 1;
-  font-size: 0.875rem;
+  font-size: var(--text-sm);
   line-height: 1.5;
   min-width: 0;
 }
 .notification-time {
-  font-size: 0.72rem;
+  font-size: var(--text-2xs);
   color: var(--color-text-muted);
   white-space: nowrap;
   flex-shrink: 0;
@@ -5747,11 +5747,11 @@ body.has-player .chat-fab {
   padding: 0.5rem 1.5rem;
   background: none;
   border: 1px solid var(--color-border-subtle);
-  border-radius: 6px;
+  border-radius: var(--radius-md);
   cursor: pointer;
-  font-size: 0.875rem;
+  font-size: var(--text-sm);
   color: var(--color-text-muted);
-  transition: border-color 0.15s, color 0.15s;
+  transition: border-color var(--dur-base), color var(--dur-base);
 }
 .load-more-btn:hover:not(:disabled) {
   border-color: var(--color-accent);
@@ -5786,7 +5786,7 @@ body.has-player .chat-fab {
 .text-editor-count {
   display: block;
   text-align: right;
-  font-size: 0.7rem;
+  font-size: var(--text-2xs);
   color: var(--color-text-muted);
   margin-top: 2px;
   user-select: none;
@@ -5805,15 +5805,15 @@ body.has-player .chat-fab {
    popup. Above the modal backdrop (1000), below tooltips (9999). */
 .mention-dropdown {
   position: fixed;
-  z-index: 1100;
+  z-index: var(--z-popover);
   max-width: calc(100vw - 16px);
   list-style: none;
   margin: 0;
   padding: 4px 0;
   background: var(--color-surface);
   border: 1px solid var(--color-border);
-  border-radius: 8px;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-2);
   max-height: var(--float-max-h, 220px);
   overflow-y: auto;
 }
@@ -5823,14 +5823,14 @@ body.has-player .chat-fab {
   gap: 8px;
   padding: 6px 12px;
   cursor: pointer;
-  transition: background 0.1s;
+  transition: background var(--dur-fast);
 }
 .mention-dropdown-item:hover,
 .mention-dropdown-item--selected {
   background: var(--color-bg);
 }
 .mention-dropdown-username {
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   color: var(--color-text);
 }
 
@@ -5840,13 +5840,13 @@ body.has-player .chat-fab {
    Above the modal backdrop (1000), below tooltips (9999). */
 .emoji-picker-float {
   position: fixed;
-  z-index: 1100;
+  z-index: var(--z-popover);
   width: 320px;
   max-width: calc(100vw - 16px);
   background: var(--color-surface);
   border: 1px solid var(--color-border);
-  border-radius: 8px;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.18);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-2);
   overflow: hidden;
 }
 
@@ -5865,7 +5865,7 @@ body.has-player .chat-fab {
   border: none;
   background: transparent;
   color: var(--color-text);
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   outline: none;
 }
 .emoji-picker-float input::placeholder {
@@ -5881,7 +5881,7 @@ body.has-player .chat-fab {
   color: var(--color-text);
   opacity: 0.45;
   cursor: pointer;
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   line-height: 1;
 }
 .emoji-picker-close-btn:hover {
@@ -5894,7 +5894,7 @@ body.has-player .chat-fab {
 }
 .emoji-picker-float [frimousse-category-header] {
   padding: 4px 8px 2px;
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   color: var(--color-text-muted, #888);
   background: var(--color-surface);
@@ -5909,8 +5909,8 @@ body.has-player .chat-fab {
   font-size: 1.35em;
   line-height: 1;
   cursor: pointer;
-  border-radius: 4px;
-  transition: background 0.1s;
+  border-radius: var(--radius-sm);
+  transition: background var(--dur-fast);
 }
 .emoji-picker-float [frimousse-emoji]:hover,
 .emoji-picker-float [frimousse-emoji][data-active] {
@@ -5921,7 +5921,7 @@ body.has-player .chat-fab {
   display: block;
   padding: 16px;
   text-align: center;
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-text-muted, #888);
 }
 
@@ -5936,13 +5936,13 @@ body.has-player .chat-fab {
   color: var(--color-text);
   border: 1px solid var(--color-border-subtle);
   padding: 0.3em 0.65em;
-  border-radius: 5px;
-  font-size: 0.78rem;
+  border-radius: var(--radius-sm);
+  font-size: var(--text-xs);
   font-style: normal;
   white-space: nowrap;
   pointer-events: none;
-  z-index: 9999;
-  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
+  z-index: var(--z-toast);
+  box-shadow: var(--shadow-2);
 }
 
 /* ── Search bar (in header center slot) ── */
@@ -5967,19 +5967,19 @@ body.has-player .chat-fab {
 .search-bar-input {
   flex: 1;
   padding: 0.3rem 0.7rem;
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   border: 2px solid var(--color-border-subtle);
   background: var(--color-bg);
   color: var(--color-text);
-  font-size: 0.875rem;
+  font-size: var(--text-sm);
   font-family: inherit;
   outline: none;
   transition:
     max-width 0.25s ease,
-    opacity 0.2s ease,
+    opacity var(--dur-slow) ease,
     padding 0.25s ease,
     border-width 0.25s ease,
-    border-color 0.15s;
+    border-color var(--dur-base);
   min-width: 0;
 }
 
@@ -6011,11 +6011,11 @@ body.has-player .chat-fab {
   padding: 0.3rem 0.55rem;
   background: transparent;
   border: 2px solid var(--color-border-subtle);
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   cursor: pointer;
-  font-size: 0.875rem;
+  font-size: var(--text-sm);
   flex-shrink: 0;
-  transition: border-color 0.15s;
+  transition: border-color var(--dur-base);
 }
 
 .search-bar-btn:hover {
@@ -6041,7 +6041,7 @@ body.has-player .chat-fab {
   padding: 3rem 1.25rem;
   color: var(--color-text-secondary);
   text-align: center;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
 }
 
 /* ── User results ── */
@@ -6063,11 +6063,11 @@ body.has-player .chat-fab {
   gap: 0.2rem;
   padding: 0.75rem 1rem;
   background: var(--color-surface);
-  border-radius: 10px;
+  border-radius: var(--radius-xl);
   border: 2px solid var(--color-border-subtle);
   text-decoration: none;
   color: var(--color-text);
-  transition: border-color 0.15s;
+  transition: border-color var(--dur-base);
 }
 
 .user-result-item:hover {
@@ -6076,11 +6076,11 @@ body.has-player .chat-fab {
 
 .user-result-name {
   font-weight: 600;
-  font-size: 0.95rem;
+  font-size: var(--text-md);
 }
 
 .user-result-description {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   color: var(--color-text-secondary);
   white-space: nowrap;
   overflow: hidden;
@@ -6116,7 +6116,7 @@ body.has-player .chat-fab {
 }
 
 .profile-appearance-label {
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   font-weight: 600;
   opacity: 0.7;
 }
@@ -6172,7 +6172,7 @@ body.has-player .chat-fab {
   border-left: 0.26rem solid transparent;
   border-right: 0.26rem solid transparent;
   border-top: 0.3rem solid currentColor;
-  transition: transform 0.15s ease;
+  transition: transform var(--dur-base) ease;
 }
 
 .category-switcher-btn--open .category-switcher-caret {
@@ -6184,14 +6184,14 @@ body.has-player .chat-fab {
   width: 2px;
   height: 1.05rem;
   background: var(--color-border);
-  border-radius: 1px;
+  border-radius: var(--radius-xs);
   flex-shrink: 0;
 }
 
 /* Themed popover (fixed-positioned so the row's overflow can't clip it). */
 .category-switcher-menu {
   position: fixed;
-  z-index: 200;
+  z-index: var(--z-dropdown);
   min-width: 11rem;
   max-height: 60vh;
   overflow-y: auto;
@@ -6203,8 +6203,8 @@ body.has-player .chat-fab {
   gap: 0.15rem;
   background: var(--color-surface);
   border: 2px solid var(--color-border-subtle);
-  border-radius: 10px;
-  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
+  border-radius: var(--radius-xl);
+  box-shadow: var(--shadow-2);
 }
 
 .category-switcher-option {
@@ -6213,16 +6213,16 @@ body.has-player .chat-fab {
   text-align: left;
   padding: 0.45rem 0.75rem;
   border: none;
-  border-radius: 7px;
+  border-radius: var(--radius-md);
   background: transparent;
   color: var(--color-text);
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   font-weight: 600;
   letter-spacing: 0.04em;
   text-transform: uppercase;
   white-space: nowrap;
   cursor: pointer;
-  transition: background 0.12s;
+  transition: background var(--dur-fast);
 }
 
 .category-switcher-option:hover {
@@ -6244,10 +6244,10 @@ body.has-player .chat-fab {
 .category-chip-toggle {
   padding: 0.25rem 0.7rem;
   border: 1px solid var(--color-border);
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-bg);
   color: var(--color-text-secondary);
-  font-size: 0.85rem;
+  font-size: var(--text-sm);
   cursor: pointer;
 }
 
@@ -6271,11 +6271,11 @@ body.has-player .chat-fab {
 
 .dump-card-category-chip {
   padding: 0.1rem 0.5rem;
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-header-user-bg);
   color: var(--color-text-secondary);
   text-decoration: none;
-  font-size: 0.75rem;
+  font-size: var(--text-xs);
 }
 
 .dump-card-category-chip:hover {
@@ -6296,14 +6296,14 @@ body.has-player .chat-fab {
   align-items: center;
   padding: 0.35rem 0.85rem;
   border: 1px solid var(--color-border);
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-bg);
   color: var(--color-text);
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-family: inherit;
   line-height: 1.4;
   cursor: pointer;
-  transition: border-color 0.15s, background 0.15s, color 0.15s, transform 0.1s;
+  transition: border-color var(--dur-base), background var(--dur-base), color var(--dur-base), transform var(--dur-fast);
 }
 
 .category-chip:hover:not(:disabled) {
@@ -6347,7 +6347,7 @@ body.has-player .chat-fab {
   gap: 0.3rem;
   padding: 0.2rem 0.3rem 0.2rem 0.7rem;
   border: 1px solid var(--color-accent);
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: var(--color-bg);
   box-shadow: 0 0 0 3px
     color-mix(in srgb, var(--color-accent) 16%, transparent);
@@ -6371,7 +6371,7 @@ body.has-player .chat-fab {
   border: none;
   background: transparent;
   color: var(--color-text);
-  font-size: 0.9rem;
+  font-size: var(--text-md);
   font-family: inherit;
   padding: 0.2rem 0;
   outline: none;
@@ -6407,13 +6407,13 @@ body.has-player .chat-fab {
   height: 1.75rem;
   padding: 0;
   border: none;
-  border-radius: 999px;
+  border-radius: var(--radius-full);
   background: transparent;
   color: var(--color-text-secondary);
-  font-size: 0.8rem;
+  font-size: var(--text-xs);
   line-height: 1;
   cursor: pointer;
-  transition: background 0.15s, color 0.15s, filter 0.15s;
+  transition: background var(--dur-base), color var(--dur-base), filter var(--dur-base);
 }
 
 .category-editor-btn:hover:not(:disabled) {
diff --git a/src/index.css b/src/index.css
index 79b66f1c..6c54514a 100644
--- a/src/index.css
+++ b/src/index.css
@@ -36,7 +36,7 @@ h1 {
 }
 
 button {
-  border-radius: 8px;
+  border-radius: var(--radius-lg);
   border: 1px solid var(--color-border);
   padding: 0.6em 1.2em;
   font-size: 1em;
@@ -44,7 +44,7 @@ button {
   font-family: inherit;
   background-color: var(--color-surface);
   cursor: pointer;
-  transition: border-color 0.25s, background-color 0.2s;
+  transition: border-color 0.25s, background-color var(--dur-slow);
 }
 button:hover {
   border-color: var(--color-accent);
diff --git a/src/main.tsx b/src/main.tsx
index a89e1300..9a67ebf7 100644
--- a/src/main.tsx
+++ b/src/main.tsx
@@ -5,6 +5,7 @@ import { I18nProvider } from "@lingui/react";
 import App from "./App.tsx";
 import { i18n, loadCatalog } from "./i18n.ts";
 
+import "./tokens.css";
 import "./index.css";
 import "./themes/smooth.css";
 import "./themes/brutalist.css";
diff --git a/src/themes/smooth.css b/src/themes/smooth.css
index 22153464..923d29c2 100644
--- a/src/themes/smooth.css
+++ b/src/themes/smooth.css
@@ -1,14 +1,17 @@
 /* ══════════════════════════════════════════════════════════════════════
    Smooth theme — clean, modern, Saira typeface
-   Palette: Prussian Blue · Deep Teal · Jasmine · Brick Ember · Blood Red
-   Applied when data-style is absent or "smooth".
+   Dark:  Prussian Blue · Deep Teal · Jasmine · Brick Ember · Blood Red
+   Light: Cream · Deep Teal · Terracotta
+   Applied when data-style is absent or "smooth". Also the base every other
+   theme builds on: anything a theme leaves unset falls back to these.
+
+   Every colour is `light-dark(<light>, <dark>)`, resolved against the
+   root `color-scheme` (see tokens.css), so auto / light / dark share this
+   one block.
    ══════════════════════════════════════════════════════════════════════ */
 
-/* ── Dark variant (default) ───────────────────────────────────────── */
 :root,
 :root[data-style="smooth"] {
-  /* Global font defaults — other themes override --font-body; App.css styles
-     consume these variables rather than hard-coding font names. */
   --font-body: "Saira", sans-serif;
   --font-mono: monospace;
 
@@ -18,48 +21,55 @@
   font-style: normal;
   line-height: 1.5;
 
-  color-scheme: light dark;
-
   /* Text */
-  --color-text: #eef0f3;
-  --color-text-secondary: #8aaabb;
-  --color-text-muted: #506878;
-  --color-on-accent: #001427; /* Prussian Blue on Jasmine */
+  --color-text: light-dark(#0e3a42, #eef0f3);
+  --color-text-secondary: light-dark(#2c6671, #8aaabb);
+  --color-text-muted: light-dark(#5c8a91, #506878);
+  --color-on-accent: light-dark(#fef8e6, #001427);
 
   /* Surfaces */
-  --color-bg: #001427; /* Prussian Blue */
-  --color-surface: #0a1f35;
+  --color-bg: light-dark(#fef8e6, #001427);
+  --color-surface: light-dark(#fffdf6, #0a1f35);
 
   /* Borders */
   --color-border: transparent;
-  --color-border-subtle: rgba(112, 141, 129, 0.2); /* Deep Teal tint */
+  --color-border-subtle: light-dark(
+    rgba(48, 144, 161, 0.18),
+    rgba(112, 141, 129, 0.2)
+  );
 
   /* Accent */
-  --color-accent: #f4d58d; /* Jasmine */
-  --color-accent-hover: #d4aa5a;
+  --color-accent: light-dark(#bc5148, #f4d58d);
+  --color-accent-hover: light-dark(#97392f, #d4aa5a);
 
   /* Links */
-  --color-link: #f4d58d;
-  --color-link-hover: #d4aa5a;
+  --color-link: light-dark(#bc5148, #f4d58d);
+  --color-link-hover: light-dark(#97392f, #d4aa5a);
 
   /* Danger */
-  --color-danger: #bf0603; /* Brick Ember */
-  --color-danger-bg: #220404;
-  --color-danger-hover: #8d0801; /* Blood Red */
+  --color-danger: light-dark(#bc5148, #bf0603);
+  --color-danger-bg: light-dark(#f8e3e0, #220404);
+  --color-danger-hover: light-dark(#97392f, #8d0801);
 
   /* Success */
-  --color-success: #708d81; /* Deep Teal */
-  --color-success-bg: #0d2820;
-  --color-success-hover: #8aaa9a;
+  --color-success: light-dark(#2e8a86, #708d81);
+  --color-success-bg: light-dark(#ddf2f1, #0d2820);
+  --color-success-hover: light-dark(#1f6b67, #8aaa9a);
 
   /* Overlays */
-  --color-overlay: rgba(0, 10, 20, 0.55);
-  --color-header-user-bg: rgba(244, 213, 141, 0.06);
-  --color-header-user-bg-hover: rgba(244, 213, 141, 0.12);
+  --color-overlay: light-dark(rgba(14, 58, 66, 0.35), rgba(0, 10, 20, 0.55));
+  --color-header-user-bg: light-dark(
+    rgba(188, 81, 72, 0.08),
+    rgba(244, 213, 141, 0.06)
+  );
+  --color-header-user-bg-hover: light-dark(
+    rgba(188, 81, 72, 0.15),
+    rgba(244, 213, 141, 0.12)
+  );
 
   /* Misc */
-  --color-option-bg: #0d2340;
-  --color-option-border: #001427;
+  --color-option-bg: light-dark(#fff9ec, #0d2340);
+  --color-option-border: light-dark(#ece4cc, #001427);
 
   /* Service brand colors (fixed, not theme-dependent). `on-brand` is the
      foreground for text sitting on any of these — also fixed, so the contrast
@@ -73,102 +83,6 @@
   --color-on-brand: #fff;
 }
 
-/* ── Light via system preference (auto color-scheme) ──────────────── */
-@media (prefers-color-scheme: light) {
-  :root:not([data-style]),
-  :root[data-style="smooth"]:not([data-color-scheme]) {
-    --color-text: #0e3a42; /* darkened deep teal */
-    --color-text-secondary: #2c6671;
-    --color-text-muted: #5c8a91;
-    --color-on-accent: #fef8e6; /* cream on teal */
-
-    --color-bg: #fef8e6; /* cream */
-    --color-surface: #fffdf6;
-
-    --color-border: transparent;
-    --color-border-subtle: rgba(48, 144, 161, 0.18);
-
-    --color-accent: #bc5148; /* terracotta — pops on cream bg */
-    --color-accent-hover: #97392f;
-
-    --color-link: #bc5148;
-    --color-link-hover: #97392f;
-
-    --color-danger: #bc5148; /* terracotta */
-    --color-danger-bg: #f8e3e0;
-    --color-danger-hover: #97392f;
-
-    --color-success: #2e8a86; /* darkened light teal */
-    --color-success-bg: #ddf2f1;
-    --color-success-hover: #1f6b67;
-
-    --color-overlay: rgba(14, 58, 66, 0.35);
-    --color-header-user-bg: rgba(188, 81, 72, 0.08);
-    --color-header-user-bg-hover: rgba(188, 81, 72, 0.15);
-
-    --color-option-bg: #fff9ec;
-    --color-option-border: #ece4cc;
-  }
-}
-
-/* ── Manual dark override ─────────────────────────────────────────── */
-:root:not([data-style])[data-color-scheme="dark"],
-:root[data-style="smooth"][data-color-scheme="dark"] {
-  color-scheme: dark;
-  --color-text: #eef0f3;
-  --color-text-secondary: #8aaabb;
-  --color-text-muted: #506878;
-  --color-on-accent: #001427;
-  --color-bg: #001427;
-  --color-surface: #0a1f35;
-  --color-border: transparent;
-  --color-border-subtle: rgba(112, 141, 129, 0.2);
-  --color-accent: #f4d58d;
-  --color-accent-hover: #d4aa5a;
-  --color-link: #f4d58d;
-  --color-link-hover: #d4aa5a;
-  --color-danger: #bf0603;
-  --color-danger-bg: #220404;
-  --color-danger-hover: #8d0801;
-  --color-success: #708d81;
-  --color-success-bg: #0d2820;
-  --color-success-hover: #8aaa9a;
-  --color-overlay: rgba(0, 10, 20, 0.55);
-  --color-header-user-bg: rgba(244, 213, 141, 0.06);
-  --color-header-user-bg-hover: rgba(244, 213, 141, 0.12);
-  --color-option-bg: #0d2340;
-  --color-option-border: #001427;
-}
-
-/* ── Manual light override ────────────────────────────────────────── */
-:root:not([data-style])[data-color-scheme="light"],
-:root[data-style="smooth"][data-color-scheme="light"] {
-  color-scheme: light;
-  --color-text: #0e3a42;
-  --color-text-secondary: #2c6671;
-  --color-text-muted: #5c8a91;
-  --color-on-accent: #fef8e6;
-  --color-bg: #fef8e6;
-  --color-surface: #fffdf6;
-  --color-border: transparent;
-  --color-border-subtle: rgba(48, 144, 161, 0.18);
-  --color-accent: #bc5148;
-  --color-accent-hover: #97392f;
-  --color-link: #bc5148;
-  --color-link-hover: #97392f;
-  --color-danger: #bc5148;
-  --color-danger-bg: #f8e3e0;
-  --color-danger-hover: #97392f;
-  --color-success: #2e8a86;
-  --color-success-bg: #ddf2f1;
-  --color-success-hover: #1f6b67;
-  --color-overlay: rgba(14, 58, 66, 0.35);
-  --color-header-user-bg: rgba(188, 81, 72, 0.08);
-  --color-header-user-bg-hover: rgba(188, 81, 72, 0.15);
-  --color-option-bg: #fff9ec;
-  --color-option-border: #ece4cc;
-}
-
 /* ══════════════════════════════════════════════════════════════════════
    Structural overrides
    ══════════════════════════════════════════════════════════════════════ */
diff --git a/src/tokens.css b/src/tokens.css
new file mode 100644
index 00000000..07b561db
--- /dev/null
+++ b/src/tokens.css
@@ -0,0 +1,112 @@
+/* ══════════════════════════════════════════════════════════════════════
+   Design tokens — shared by every theme.
+   Themes (src/themes/*.css) set the palette (`--color-*`) and may override
+   any of the shape/type/depth tokens below; App.css only consumes tokens.
+   ══════════════════════════════════════════════════════════════════════ */
+
+:root {
+  /* ── Color scheme ──
+     `light-dark()` in the theme palettes resolves against this, so a single
+     palette block covers auto, forced-light and forced-dark. */
+  color-scheme: light dark;
+
+  /* ── Space (4px grid) ── */
+  --space-1: 0.25rem;
+  --space-2: 0.5rem;
+  --space-3: 0.75rem;
+  --space-4: 1rem;
+  --space-5: 1.25rem;
+  --space-6: 1.5rem;
+  --space-7: 2rem;
+  --space-8: 3rem;
+
+  /* ── Radius ── */
+  --radius-xs: 3px;
+  --radius-sm: 4px;
+  --radius-md: 6px;
+  --radius-lg: 8px;
+  --radius-xl: 12px;
+  --radius-full: 999px;
+
+  /* ── Type scale ── */
+  --text-2xs: 0.7rem;
+  --text-xs: 0.78rem;
+  --text-sm: 0.85rem;
+  --text-md: 0.92rem;
+  --text-base: 1rem;
+  --text-lg: 1.15rem;
+  --text-xl: 1.25rem;
+  --text-2xl: 1.5rem;
+  --text-3xl: 2rem;
+  --text-display: 3rem;
+
+  --leading-tight: 1.2;
+  --leading-snug: 1.35;
+  --leading-normal: 1.5;
+
+  --weight-regular: 400;
+  --weight-medium: 500;
+  --weight-semibold: 600;
+  --weight-bold: 700;
+
+  --tracking-caps: 0.06em;
+
+  /* ── Fonts ── */
+  --font-body: system-ui, sans-serif;
+  --font-display: var(--font-body);
+  --font-mono: ui-monospace, "SFMono-Regular", Menlo, monospace;
+
+  /* ── Elevation ── */
+  --shadow-1: 0 1px 2px rgb(0 0 0 / 0.12);
+  --shadow-2: 0 4px 16px rgb(0 0 0 / 0.2);
+  --shadow-3: 0 8px 32px rgb(0 0 0 / 0.45), 0 2px 8px rgb(0 0 0 / 0.3);
+  --shadow-focus: 0 0 0 3px var(--color-focus-ring);
+
+  /* ── Motion ── */
+  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
+  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
+  --dur-fast: 0.12s;
+  --dur-base: 0.15s;
+  --dur-slow: 0.2s;
+
+  /* ── Layers ── */
+  --z-raised: 1;
+  --z-sticky: 100;
+  --z-dropdown: 200;
+  --z-fab: 900;
+  --z-modal: 1000;
+  --z-popover: 1100;
+  --z-toast: 9999;
+
+  /* ── Derived colors ──
+     Defaults computed from each theme's base palette, so every theme gets
+     the full semantic set; a theme overrides any of these when the derived
+     value isn't right for it. */
+  --color-surface-raised: color-mix(
+    in srgb,
+    var(--color-surface) 94%,
+    var(--color-text)
+  );
+  --color-surface-sunken: color-mix(
+    in srgb,
+    var(--color-bg) 96%,
+    var(--color-text)
+  );
+  --color-accent-soft: color-mix(in srgb, var(--color-accent) 14%, transparent);
+  --color-focus-ring: color-mix(in srgb, var(--color-accent) 45%, transparent);
+  --color-warning: #d4a017;
+  --color-on-danger: #fff;
+
+  /* Legacy names still referenced by a few rules. */
+  --color-muted: var(--color-text-muted);
+  --color-error: var(--color-danger);
+  --color-surface-alt: var(--color-surface-raised);
+}
+
+:root[data-color-scheme="light"] {
+  color-scheme: light;
+}
+
+:root[data-color-scheme="dark"] {
+  color-scheme: dark;
+}