diff --git a/src-tauri/tauri.conf.json b/src-tauri/tauri.conf.json
index f4caccd..adf92c6 100644
--- a/src-tauri/tauri.conf.json
+++ b/src-tauri/tauri.conf.json
@@ -13,8 +13,10 @@
     "windows": [
       {
         "title": "thomann-dsp-app",
-        "width": 800,
-        "height": 600
+        "width": 1200,
+        "height": 800,
+        "minWidth": 900,
+        "minHeight": 600
       }
     ],
     "security": {
diff --git a/src/components/Button/Button.css b/src/components/Button/Button.css
index b143f7b..d9daa3a 100644
--- a/src/components/Button/Button.css
+++ b/src/components/Button/Button.css
@@ -46,4 +46,4 @@
   background: transparent;
   border-color: var(--border-hairline);
   color: var(--text-muted);
-}
\ No newline at end of file
+}
diff --git a/src/components/Button/Button.tsx b/src/components/Button/Button.tsx
index 5cd04f1..765c775 100644
--- a/src/components/Button/Button.tsx
+++ b/src/components/Button/Button.tsx
@@ -34,4 +34,4 @@ export default function Button({
       {children}
     </button>
   );
-}
\ No newline at end of file
+}
diff --git a/src/components/Card/Card.css b/src/components/Card/Card.css
new file mode 100644
index 0000000..51ea730
--- /dev/null
+++ b/src/components/Card/Card.css
@@ -0,0 +1,16 @@
+.card {
+  background: var(--bg-panel);
+  border: var(--border-width) solid var(--border-hairline);
+  border-radius: var(--radius-lg);
+  box-shadow: var(--shadow-md);
+  padding: var(--space-6);
+
+  color: var(--text-primary);
+  font-family: var(--font-ui);
+  font-size: var(--font-size-sm);
+
+  display: flex;
+  flex-direction: column;
+
+  width: clamp(280px, 33.333%, 480px);
+}
diff --git a/src/components/Card/Card.tsx b/src/components/Card/Card.tsx
new file mode 100644
index 0000000..9a8fb32
--- /dev/null
+++ b/src/components/Card/Card.tsx
@@ -0,0 +1,12 @@
+import './Card.css';
+
+interface CardProps {
+  children: React.ReactNode;
+  className?: string;
+}
+
+function Card({ children, className = '' }: CardProps) {
+  return <div className={`card ${className}`}>{children}</div>;
+}
+
+export default Card;
diff --git a/src/components/Led/Led.css b/src/components/Led/Led.css
index 6fa6ecd..0990dc5 100644
--- a/src/components/Led/Led.css
+++ b/src/components/Led/Led.css
@@ -47,7 +47,8 @@
 }
 
 @keyframes pulse {
-  0%, 100% {
+  0%,
+  100% {
     transform: scale(1);
     opacity: 1;
   }
diff --git a/src/components/Led/Led.tsx b/src/components/Led/Led.tsx
index d9576f1..c3e6b81 100644
--- a/src/components/Led/Led.tsx
+++ b/src/components/Led/Led.tsx
@@ -1,17 +1,14 @@
-import "./Led.css"
+import './Led.css';
 
 type LedProps = {
   status?: 'connected' | 'connecting' | 'disconnected';
   className?: string;
 };
 
-export function Led({
-  status = 'disconnected',
-  className = '',
-}: LedProps) {
+export function Led({ status = 'disconnected', className = '' }: LedProps) {
   return (
     <span className={['led', className].filter(Boolean).join(' ')}>
       <span className={`led-dot led-dot--${status}`} />
     </span>
   );
-}
\ No newline at end of file
+}
diff --git a/src/components/Sidebar/Sidebar.css b/src/components/Sidebar/Sidebar.css
index 6363703..3808bd5 100644
--- a/src/components/Sidebar/Sidebar.css
+++ b/src/components/Sidebar/Sidebar.css
@@ -94,7 +94,7 @@
 .sidebar-rail {
   position: fixed;
 
-  top: var(--header-height);
+  top: calc(var(--header-height));
   left: 0;
   bottom: 0;
 
diff --git a/src/components/dsp408/ConnectionSection/ConnectionSection.tsx b/src/components/dsp408/ConnectionSection/ConnectionSection.tsx
index c8d9956..6ec2825 100644
--- a/src/components/dsp408/ConnectionSection/ConnectionSection.tsx
+++ b/src/components/dsp408/ConnectionSection/ConnectionSection.tsx
@@ -31,61 +31,54 @@ function ConnectionPanel({
         className="connection-panel-frame"
         style={{ '--panel-w': DESIGN_WIDTH, '--panel-h': DESIGN_HEIGHT } as React.CSSProperties}
       >
-          <div className="card panel" style={{ width: DESIGN_WIDTH, height: DESIGN_HEIGHT }}>
-            <div className="panel-header">
-              <div className="panel-header-text">
-                <h1 className="panel-title" title={dsp.name}>
-                  {dsp.name}
-                </h1>
-                <div className="panel-type">{dsp.type}</div>
-              </div>
-
-              <div className="status-block">
-                <span className={`led led--lg led--${dsp.status}`} />
-                <span className={`status-label status-label--${dsp.status}`}>{statusLabel}</span>
-              </div>
+        <div className="card panel" style={{ width: DESIGN_WIDTH, height: DESIGN_HEIGHT }}>
+          <div className="panel-header">
+            <div className="panel-header-text">
+              <h1 className="panel-title" title={dsp.name}>
+                {dsp.name}
+              </h1>
+              <div className="panel-type">{dsp.type}</div>
             </div>
 
-            <dl className="specs">
-              <div className="spec">
-                <dt>IP address</dt>
-                <dd className="mono" title={dsp.ip}>
-                  {dsp.ip}
-                </dd>
-              </div>
-
-              <div className="spec">
-                <dt>Port</dt>
-                <dd className="mono">{dsp.port}</dd>
-              </div>
-
-              <div className="spec">
-                <dt>Device ID</dt>
-                <dd className="mono" title={dsp.deviceId || undefined}>
-                  {dsp.deviceId || '—'}
-                </dd>
-              </div>
-            </dl>
-
-            <div className="panel-actions">
-              {dsp.status === 'connected' ? (
-                <Button
-                  variant="outline"
-                  onClick={onDisconnect}
-                >
-                  Disconnect
-                </Button>
-              ) : (
-                <Button
-                  variant="primary"
-                  onClick={onConnect}
-                  disabled={dsp.status === 'connecting'}
-                >
-                  {dsp.status === 'connecting' ? 'Connecting…' : 'Connect'}
-                </Button>
-              )}
+            <div className="status-block">
+              <span className={`led led--lg led--${dsp.status}`} />
+              <span className={`status-label status-label--${dsp.status}`}>{statusLabel}</span>
             </div>
           </div>
+
+          <dl className="specs">
+            <div className="spec">
+              <dt>IP address</dt>
+              <dd className="mono" title={dsp.ip}>
+                {dsp.ip}
+              </dd>
+            </div>
+
+            <div className="spec">
+              <dt>Port</dt>
+              <dd className="mono">{dsp.port}</dd>
+            </div>
+
+            <div className="spec">
+              <dt>Device ID</dt>
+              <dd className="mono" title={dsp.deviceId || undefined}>
+                {dsp.deviceId || '—'}
+              </dd>
+            </div>
+          </dl>
+
+          <div className="panel-actions">
+            {dsp.status === 'connected' ? (
+              <Button variant="outline" onClick={onDisconnect}>
+                Disconnect
+              </Button>
+            ) : (
+              <Button variant="primary" onClick={onConnect} disabled={dsp.status === 'connecting'}>
+                {dsp.status === 'connecting' ? 'Connecting…' : 'Connect'}
+              </Button>
+            )}
+          </div>
+        </div>
       </div>
     </div>
   );
diff --git a/src/components/topbar/Topbar.css b/src/components/topbar/Topbar.css
index 1c98d06..42e05b9 100644
--- a/src/components/topbar/Topbar.css
+++ b/src/components/topbar/Topbar.css
@@ -5,8 +5,9 @@
   background: var(--bg-void);
   border-bottom: 1px solid var(--border-hairline);
   -webkit-app-region: drag;
-  padding-inline: var(--space-2);
-  gap: var(--space-2);
+  padding-inline: var(--space-3);
+  gap: var(--space-3);
+  box-sizing: border-box
 }
 
 .logo-slot {
@@ -34,13 +35,17 @@
   overflow-y: hidden;
   min-width: 0;
   -webkit-app-region: no-drag;
+  border-left: 1px solid var(--border-hairline);
+
+
   scrollbar-width: thin;
   scrollbar-color: var(--border-hairline) transparent;
   scroll-behavior: smooth;
   scroll-padding-inline: var(--space-3);
   scroll-snap-type: x proximity;
   align-items: center;
-  gap: var(--space-2);
+  gap: var(--space-4);
+  padding-left: var(--space-4);
 
   container-type: inline-size;
   container-name: tabstrip;
@@ -49,28 +54,13 @@
   mask-image: linear-gradient(to right, transparent, black 0);
 }
 
-.tabstrip::-webkit-scrollbar {
-  height: 4px;
-}
-.tabstrip::-webkit-scrollbar-thumb {
-  background: var(--border-hairline);
-  border-radius: var(--radius-pill);
-}
-
 .tabstrip-actions {
   display: flex;
   align-items: center;
   justify-content: center;
   height: var(--header-height);
   flex: 0 0 auto;
-  gap: var(--space-2);
-}
-
-.icon-crown,
-.icon-tab-add,
-.icon-tab-add-empty {
-  aspect-ratio: 1/1;
-  height: 70%;
+  gap: var(--space-3);
 }
 
 .tab-action {
@@ -91,8 +81,15 @@
   color: var(--text-primary);
 }
 
+.tab-add {
+  height: 70%;
+  border-radius: 50%;
+  color: var(--text-muted);
+  aspect-ratio: 1;
+}
+
 .crown-action {
-  height: 50%;
+  height: 70%;
   aspect-ratio: 1;
   border-radius: 50%;
   color: #facc15;
@@ -103,28 +100,26 @@
   color: #fde047;
 }
 
-.tab-add {
-  height: 50%;
-  border-radius: 50%;
-  color: var(--text-muted);
-  aspect-ratio: 1;
+.icon-crown,
+.icon-tab-add,
+.icon-tab-add-empty {
+  aspect-ratio: 1/1;
+  height: 80%;
 }
 
 .tab-add-empty {
-  height: 50%;
+  height: 70%;
   border-radius: var(--radius-pill);
   border: var(--border-width-active) dashed var(--border-hairline);
   color: var(--text-muted);
 
   font-family: var(--font-ui);
-  font-size: var(--tab-add-empty-font);
   font-weight: 500;
 
   flex-shrink: 0;
 
-  gap: var(--space-1);
-
-  padding-inline: var(--space-1);
+  gap: var(--space-2);
+  padding-inline: var(--space-2);
 }
 
 .tab-add-empty:hover {
@@ -136,15 +131,14 @@
 .tab {
   display: flex;
   align-items: center;
-  gap: var(--space-2);
+  gap: var(--space-3);
   height: var(--tab-height);
   padding: 0 var(--space-3);
-  border: var(--border-width) solid var(--border-hairline);
+  border: var(--border-width-active) solid transparent;
   border-radius: var(--radius-lg);
   background: transparent;
   color: var(--text-muted);
   font-family: var(--font-ui);
-  font-size: var(--tab-font-size);
   cursor: pointer;
   box-sizing: border-box;
   scroll-snap-align: start;
@@ -152,14 +146,17 @@
   flex: 0 0 25%;
   max-width: 25%;
   min-width: calc(
-    (var(--space-3) * 2) +
-    (var(--tab-height) * 0.5) +
-    (var(--space-2) * 2) +
-    4ch +
-    var(--tab-close-size)
+    (var(--space-3) * 2) + (var(--tab-height) * 0.5) + (var(--space-2) * 2) + 4ch +
+      var(--tab-close-size)
   );
 }
 
+.tab:hover {
+  background: var(--bg-raised);
+  color: var(--text-primary);
+  border-color: var(--accent-brand);
+}
+
 .tab span[title] {
   overflow: hidden;
   text-overflow: ellipsis;
@@ -168,7 +165,7 @@
 }
 
 .tab-led {
-  height: 50%;
+  height: 40%;
   aspect-ratio: 1 / 1;
 
   flex: 0 0 auto;
@@ -182,13 +179,14 @@
 }
 
 .tab-close {
+  height: 50%;
+  aspect-ratio: 1 / 1;
+
   display: flex;
   align-items: center;
   justify-content: center;
   flex: 0 0 auto;
   margin-left: auto;
-  width: var(--tab-close-size);
-  height: var(--tab-close-size);
   padding: 0;
   font-size: var(--tab-close-font);
   line-height: 1;
@@ -196,12 +194,6 @@
   border-radius: var(--radius-sm);
 }
 
-.tab:hover {
-  background: var(--bg-raised);
-  border-color: var(--text-muted);
-  color: var(--text-primary);
-}
-
 .tab--active {
   background: var(--bg-panel);
   border-color: var(--accent-brand);
@@ -217,16 +209,14 @@
   color: var(--text-primary);
 }
 
-.tab-add:active {
-  background: var(--border-hairline);
-}
-
-.tabstrip::-webkit-scrollbar {
-  display: none;
-}
-
 .tabstrip[data-fade-start='true'] {
-  -webkit-mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), black);
+  -webkit-mask-image: linear-gradient(
+    to right,
+    transparent,
+    black 24px,
+    black calc(100% - 24px),
+    black
+  );
   mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), black);
 }
 .tabstrip[data-fade-end='true'] {
@@ -234,18 +224,27 @@
   mask-image: linear-gradient(to right, black, black calc(100% - 24px), transparent);
 }
 .tabstrip[data-fade-start='true'][data-fade-end='true'] {
-  -webkit-mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), transparent);
-  mask-image: linear-gradient(to right, transparent, black 24px, black calc(100% - 24px), transparent);
+  -webkit-mask-image: linear-gradient(
+    to right,
+    transparent,
+    black 24px,
+    black calc(100% - 24px),
+    transparent
+  );
+  mask-image: linear-gradient(
+    to right,
+    transparent,
+    black 24px,
+    black calc(100% - 24px),
+    transparent
+  );
 }
 
 .tab[data-step='6'],
 .tab[data-step='8'],
 .tab[data-step='10'] {
   min-width: calc(
-    (var(--space-3) * 2) +
-    (var(--tab-height) * 0.5) +
-    (var(--space-2) * 2) +
-    4ch +
-    var(--tab-close-size)
+    (var(--space-3) * 2) + (var(--tab-height) * 0.5) + (var(--space-2) * 2) + 4ch +
+      var(--tab-close-size)
   );
-}
\ No newline at end of file
+}
diff --git a/src/components/topbar/Topbar.tsx b/src/components/topbar/Topbar.tsx
index 6cd2d16..b989fbd 100644
--- a/src/components/topbar/Topbar.tsx
+++ b/src/components/topbar/Topbar.tsx
@@ -4,6 +4,7 @@ import AnimatedLogo from '../../assets/icons/AnimatedLogo';
 import { PlusIcon } from '../../assets/icons/PlusIcon';
 import { CrownIcon } from '../../assets/icons/CrownIcon';
 import { Led } from '../Led/Led';
+import { CloseIcon } from '../../assets/icons/CloseIcon';
 
 import './Topbar.css';
 
@@ -15,7 +16,12 @@ function getStep(count: number) {
 }
 
 function Tab({
-  dsp, active, dimmed, step, onSelect, onRemove,
+  dsp,
+  active,
+  dimmed,
+  step,
+  onSelect,
+  onRemove,
 }: {
   dsp: DSP;
   active: boolean;
@@ -43,7 +49,7 @@ function Tab({
           onRemove();
         }}
       >
-        x
+        <CloseIcon />
       </span>
     </button>
   );
@@ -81,19 +87,19 @@ function TopBar({
     el.dataset.fadeStart = String(!atStart);
     el.dataset.fadeEnd = String(!atEnd && el.scrollWidth > el.clientWidth);
   };
-  
+
   useEffect(() => {
-  const el = tabstripRef.current;
-  if (!el) return;
-  const onWheel = (e: WheelEvent) => {
-    if (Math.abs(e.deltaY) > Math.abs(e.deltaX)) {
-      el.scrollLeft += e.deltaY;
-      e.preventDefault();
-    }
-  };
-  el.addEventListener('wheel', onWheel, { passive: false });
-  return () => el.removeEventListener('wheel', onWheel);
-}, []);
+    const el = tabstripRef.current;
+    if (!el) return;
+    const onWheel = (e: WheelEvent) => {
+      if (Math.abs(e.deltaY) > Math.abs(e.deltaX)) {
+        el.scrollLeft += e.deltaY;
+        e.preventDefault();
+      }
+    };
+    el.addEventListener('wheel', onWheel, { passive: false });
+    return () => el.removeEventListener('wheel', onWheel);
+  }, []);
 
   useEffect(() => {
     updateFade();
@@ -164,8 +170,8 @@ function TopBar({
             setSelect(null);
           }}
         >
-        <CrownIcon className="icon-crown" />
-      </button>
+          <CrownIcon className="icon-crown" />
+        </button>
       </div>
     </header>
   );
diff --git a/src/pages/HomePage/HomePage.css b/src/pages/HomePage/HomePage.css
index e69de29..bad807d 100644
--- a/src/pages/HomePage/HomePage.css
+++ b/src/pages/HomePage/HomePage.css
@@ -0,0 +1,67 @@
+.home-page {
+  width: 100%;
+  height: 100%;
+  position: relative;
+
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.status-block {
+  display: flex;
+  align-items: center;
+  gap: var(--space-2);
+  flex-shrink: 0;
+}
+
+.status-label {
+  font-weight: 500;
+  transition: color var(--dur-base) var(--ease-standard);
+}
+
+.status-label--connected {
+  color: var(--accent-live);
+}
+
+.status-label--connecting {
+  color: var(--accent-connecting);
+}
+
+.status-label--disconnected {
+  color: var(--text-muted);
+}
+
+.specs {
+  display: flex;
+  flex-direction: column;
+  gap: var(--space-3);
+
+  margin: 0 0 var(--space-6);
+  padding: var(--space-4);
+
+  background: var(--bg-panel);
+
+  border: 1px solid var(--border-hairline);
+  border-radius: var(--radius-md);
+}
+
+.spec {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+}
+
+.spec dt {
+  color: var(--text-muted);
+}
+
+.spec dd {
+  margin: 0;
+  color: var(--text-primary);
+}
+
+.panel-actions {
+  display: flex;
+  justify-content: flex-end;
+}
diff --git a/src/pages/HomePage/HomePage.tsx b/src/pages/HomePage/HomePage.tsx
index 9020a58..ea01516 100644
--- a/src/pages/HomePage/HomePage.tsx
+++ b/src/pages/HomePage/HomePage.tsx
@@ -1,4 +1,6 @@
 import Button from '../../components/Button/Button';
+import Card from '../../components/Card/Card';
+import './HomePage.css';
 
 function HomePage({
   dspCount,
@@ -10,7 +12,7 @@ function HomePage({
   onAddDSP: () => void;
 }) {
   return (
-    <div className="card panel">
+    <Card>
       <dl className="specs">
         <div className="spec">
           <dt>Connected</dt>
@@ -32,7 +34,7 @@ function HomePage({
           Add a DSP
         </Button>
       </div>
-    </div>
+    </Card>
   );
 }
 
diff --git a/src/styles/App.css b/src/styles/App.css
index d0cf788..1f38199 100644
--- a/src/styles/App.css
+++ b/src/styles/App.css
@@ -16,6 +16,7 @@ html,
 body,
 #root {
   height: 100%;
+  font-size: var(--font-size);
 }
 
 body {
@@ -69,15 +70,6 @@ button {
   overflow-y: auto;
 }
 
-.card {
-  width: 100%;
-  max-width: 480px;
-  background: var(--bg-raised);
-  border: 1px solid var(--border-hairline);
-  border-radius: var(--radius-lg);
-  padding: 28px;
-}
-
 .empty {
   display: flex;
   flex-direction: column;
@@ -97,63 +89,6 @@ button {
   font-size: 14px;
 }
 
-/* ---------- DSP panel ---------- */
-
-.status-block {
-  display: flex;
-  align-items: center;
-  gap: var(--space-2);
-  flex-shrink: 0;
-}
-
-.status-label {
-  font-size: 12px;
-  font-weight: 500;
-  transition: color var(--dur-base) var(--ease-standard);
-}
-
-.status-label--connected {
-  color: var(--accent-live);
-}
-.status-label--connecting {
-  color: var(--accent-connecting);
-}
-.status-label--disconnected {
-  color: var(--text-muted);
-}
-
-.specs {
-  display: flex;
-  flex-direction: column;
-  gap: var(--space-3);
-  margin: 0 0 var(--space-6);
-  padding: var(--space-4);
-  background: var(--bg-panel);
-  border: 1px solid var(--border-hairline);
-  border-radius: var(--radius-md);
-}
-
-.spec {
-  display: flex;
-  align-items: center;
-  justify-content: space-between;
-  font-size: 13px;
-}
-
-.spec dt {
-  color: var(--text-muted);
-}
-
-.spec dd {
-  margin: 0;
-  color: var(--text-primary);
-}
-
-.panel-actions {
-  display: flex;
-  justify-content: flex-end;
-}
-
 /* ---------- Form ---------- */
 
 .form-header {
@@ -221,3 +156,22 @@ button {
   gap: 10px;
   margin-top: var(--space-2);
 }
+
+/* Global scrollbar */
+::-webkit-scrollbar {
+  width: 4px;
+  height: 4px;
+}
+
+::-webkit-scrollbar-track {
+  background: transparent;
+}
+
+::-webkit-scrollbar-thumb {
+  background: var(--border-hairline);
+  border-radius: var(--radius-pill);
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background: var(--text-muted);
+}
diff --git a/src/styles/variables.css b/src/styles/variables.css
index 926005c..657028b 100644
--- a/src/styles/variables.css
+++ b/src/styles/variables.css
@@ -1,34 +1,7 @@
 @import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap');
 
 :root {
-  --header-height: 7vh;
-  --gain-section-height: 40vh;
-
-  --sidebar-width-collapsed: 6vh;
-  --sidebar-width-expanded: 22vh;
-
-  --sidebar-icon-size: 2vh;
-  --sidebar-item-size: 4.5vh;
-  --sidebar-toggle-size: 3vh;
-  --sidebar-label-size: 1.9vh;
-  --sidebar-item-gap: 1vh;
-  --sidebar-item-padding: 1vh;
-
-  --font-size-sm: 3vh;
-
-  --tab-height: 4vh;
-  --tab-width: 18vh;
-  --tab-font-size: 1.3vh;
-  --tab-close-size: 1.8vh;
-  --tab-close-font: 1.5vh;
-
-  /* --tab-add-size: 2.6vh; */
-  --tab-add-empty-height: 3vh;
-  --tab-add-empty-font: 1.2vh;
-
-  --crown-icon-size: 2.2vh;
-  --tab-add-icon-size: 1.6vh;
-  --logo-size: 18vh;
+  --font-size: 18px;
 
   /* ---------- Color ---------- */
   --bg-void: #0d0f12;
@@ -42,6 +15,67 @@
   --accent-down: #ff5c5c;
   --accent-connecting: #f5a623;
 
+  /* ---------- Font ---------- */
+  --font-xs: 0.75rem;
+  --font-sm: 0.875rem;
+  --font-md: 1rem;
+  --font-lg: 1.125rem;
+  --font-xl: 1.25rem;
+  --font-2xl: 1.5rem;
+
+  /* ---------- Spacing Scale ---------- */
+  --space-0: 0;
+  --space-1: 0.25rem;
+  --space-2: 0.5rem;
+  --space-3: 0.75rem;
+  --space-4: 1rem;
+  --space-5: 1.25rem;
+  --space-6: 1.5rem;
+  --space-8: 2rem;
+  --space-10: 2.5rem;
+  --space-12: 3rem;
+
+  /* ---------- Border ---------- */
+  --border-width: 1px;
+  --border-width-active: 2px;
+
+  /* ---------- Radius ---------- */
+  --radius-sm: 6px;
+  --radius-md: 8px;
+  --radius-lg: 10px;
+  --radius-pill: 999px;
+
+
+
+  /* ---------- Header ---------- */
+  --header-height: 50px;
+  --font-size-header: 1rem;
+
+  --tab-height: calc(var(--header-height) * 0.75);
+
+  /* ---------- SideBar ---------- */
+  --sidebar-width-collapsed: calc(var(--header-height) * 0.85 +  2 * var(--space-3));
+
+  --gain-section-height: 40vh;
+
+  --sidebar-width-expanded: 22vh;
+
+  --sidebar-icon-size: 2vh;
+  --sidebar-item-size: 4.5vh;
+  --sidebar-toggle-size: 3vh;
+  --sidebar-label-size: 1.9vh;
+  --sidebar-item-gap: 1vh;
+  --sidebar-item-padding: 1vh;
+
+  --font-size-sm: 0.875rem;
+
+  /* --tab-add-size: 2.6vh; */
+  --tab-add-empty-height: 3vh;
+
+  --crown-icon-size: 2.2vh;
+  --tab-add-icon-size: 1.6vh;
+  --logo-size: 18vh;
+
   /* ---------- Type ---------- */
   --font-ui: 'Inter', -apple-system, 'Segoe UI', sans-serif;
   --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
@@ -54,38 +88,18 @@
   --ease-out: cubic-bezier(0, 0, 0.2, 1);
   --ease-in: cubic-bezier(0.4, 0, 1, 1);
 
-  /* ---------- Spacing scale ---------- */
-  --space-1: 0.5vh;
-  --space-2: 1vh;
-  --space-3: 1.5vh;
-  --space-4: 2vh;
-  --space-5: 2.5vh;
-  --space-6: 3vh;
-
-  /* ---------- Radius ---------- */
-  --radius-sm: 6px;
-  --radius-md: 8px;
-  --radius-lg: 1vh;
-  --radius-pill: 999px;
+  
 
   /* ---------- Shadow ---------- */
   --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.2);
   --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.25);
 
-  /* ---------- Border ---------- */
-  --border-width: 0.07vh;
-  --border-width-active: 0.1vh;
+  
 
   /* ---------- Animation ---------- */
   --transition-fast: 120ms;
   --transition-base: 180ms;
 
-  --font-xs: 1.2vh;
-  --font-sm: 1.4vh;
-  --font-md: 1.6vh;
-  --font-lg: 1.9vh;
-  --font-xl: 2.2vh;
-
   --font-button: 1.5vh;
   --font-label: 1.4vh;
   --font-title: 1.8vh;