diff --git a/src/components/Card/Card.css b/src/components/Card/Card.css
index 034ba6d..dda61b6 100644
--- a/src/components/Card/Card.css
+++ b/src/components/Card/Card.css
@@ -12,7 +12,7 @@
 
   color: var(--text-primary);
   font-family: var(--font-ui);
-  font-size: var(--font-size-sm);
+  font-size: var(--font-sm);
 
   display: flex;
   flex-direction: column;
diff --git a/src/components/Sidebar/Sidebar.css b/src/components/Sidebar/Sidebar.css
index 975734c..5f61ea5 100644
--- a/src/components/Sidebar/Sidebar.css
+++ b/src/components/Sidebar/Sidebar.css
@@ -1,27 +1,219 @@
-/* ---------- Label ---------- */
+/* ---------- Sidebar ---------- */
+
+.sidebar-rail {
+  position: fixed;
+  top: var(--header-height);
+  left: 0;
+  bottom: 0;
+
+  width: var(--sidebar-width-collapsed);
+
+  display: flex;
+  flex-direction: column;
+
+  background: var(--bg-void);
+  border-right: var(--border-width) solid var(--border-hairline);
+
+  z-index: 30;
+  overflow: visible;
+
+  transition: width var(--dur-base) var(--ease-standard);
+}
+
+.sidebar-rail--expanded {
+  width: var(--sidebar-width-expanded);
+}
+
+/* ---------- Header (app name + toggle) ---------- */
+
+.sidebar-header {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  flex: 0 0 auto;
+  padding: var(--space-1);
+  height: var(--header-height);
+}
+
+.sidebar-rail--expanded .sidebar-header {
+  justify-content: space-between;
+  padding-inline: var(--space-3);
+}
+
+.sidebar-app-name {
+  display: flex;
+  align-items: center;
+  aspect-ratio: 1;
+  height: calc(var(--header-height) * 0.7);
+
+  font-size: var(--font-md);
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+
+  white-space: nowrap;
+  overflow: hidden;
+
+  flex: 0 1 auto;
+  min-width: 0;
 
-.sidebar-label {
-  font-size: var(--sidebar-label-size);
   opacity: 0;
   max-width: 0;
-  overflow: hidden;
-  white-space: nowrap;
+  pointer-events: none;
+
   transition:
     opacity var(--dur-fast) var(--ease-standard),
     max-width var(--dur-base) var(--ease-standard);
 }
 
-.sidebar-rail--expanded .sidebar-label {
+.sidebar-rail--expanded .sidebar-app-name {
   opacity: 1;
   max-width: 200px;
+  pointer-events: auto;
+  transition-delay: var(--dur-fast);
+}
+
+.sidebar-toggle {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex: 0 0 auto;
+
+  aspect-ratio: 1;
+  height: calc(var(--header-height) * 0.7);
+
+  border: var(--border-width-active) solid transparent;
+  border-radius: var(--radius-pill);
+
+  background: var(--bg-void);
+  color: var(--text-muted);
+
+  cursor: pointer;
+  padding: 0;
+
+  transition:
+    background var(--dur-base) var(--ease-standard),
+    color var(--dur-base) var(--ease-standard),
+    border-color var(--dur-base) var(--ease-standard);
+}
+
+.sidebar-toggle:hover {
+  background: var(--bg-raised);
+  color: var(--text-primary);
+  border-color: var(--accent-brand);
+}
+
+.sidebar-toggle-icon {
+  aspect-ratio: 1;
+  width: 70%;
+  transition: transform var(--dur-base) var(--ease-standard);
+}
+
+.sidebar-rail--expanded .sidebar-toggle-icon {
+  transform: rotate(180deg);
+}
+
+/* ---------- Scroll ---------- */
+
+.sidebar-scroll {
+  flex: 1 1 auto;
+  min-height: 0;
+
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  gap: var(--space-1);
+
+  padding-block: var(--space-1) var(--space-3);
+  overflow-y: auto;
+
+  -webkit-mask-image: linear-gradient(to bottom, transparent, black 0);
+  mask-image: linear-gradient(to bottom, transparent, black 0);
+}
+
+.sidebar-rail--expanded .sidebar-scroll {
+  align-items: stretch;
+  padding-inline: var(--space-2);
+}
+
+.sidebar-scroll[data-fade-top='true'] {
+  -webkit-mask-image: linear-gradient(
+    to bottom,
+    transparent,
+    black 24px,
+    black calc(100% - 24px),
+    black
+  );
+  mask-image: linear-gradient(to bottom, transparent, black 24px, black calc(100% - 24px), black);
+}
+.sidebar-scroll[data-fade-bottom='true'] {
+  -webkit-mask-image: linear-gradient(to bottom, black, black calc(100% - 24px), transparent);
+  mask-image: linear-gradient(to bottom, black, black calc(100% - 24px), transparent);
+}
+.sidebar-scroll[data-fade-top='true'][data-fade-bottom='true'] {
+  -webkit-mask-image: linear-gradient(
+    to bottom,
+    transparent,
+    black 24px,
+    black calc(100% - 24px),
+    transparent
+  );
+  mask-image: linear-gradient(
+    to bottom,
+    transparent,
+    black 24px,
+    black calc(100% - 24px),
+    transparent
+  );
+}
+
+/* ---------- Item ---------- */
+
+.sidebar-item {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  gap: var(--sidebar-item-gap);
+
+  aspect-ratio: 1;
+  height: calc(var(--header-height) * 0.7);
+
+  border: var(--border-width-active) solid transparent;
+  border-radius: var(--radius-lg);
+
+  background: transparent;
+  color: var(--text-muted);
+
+  cursor: pointer;
+
+  transition:
+    background var(--dur-base) var(--ease-standard),
+    color var(--dur-base) var(--ease-standard),
+    border-color var(--dur-base) var(--ease-standard);
+}
+
+.sidebar-item:hover {
+  background: var(--bg-raised);
+  color: var(--text-primary);
+  border: var(--border-width-active) solid var(--accent-brand);
+}
+
+.sidebar-item--active {
+  border-color: var(--accent-brand);
+  color: var(--text-primary);
+}
+
+.sidebar-rail--expanded .sidebar-item {
+  width: 100%;
+  justify-content: flex-start;
+  padding-inline: var(--space-2);
 }
 
 /* ---------- Icon ---------- */
 
 .sidebar-icon {
-  width: var(--sidebar-icon-size, 20px);
-  height: var(--sidebar-icon-size, 20px);
-
+  aspect-ratio: 1;
+  height: 80%;
   flex-shrink: 0;
 
   display: flex;
@@ -34,208 +226,32 @@
 .sidebar-icon svg {
   width: 100%;
   height: 100%;
-
   display: block;
-
   stroke: currentColor;
   fill: none;
 }
 
-/* ---------- Item ---------- */
-
-.sidebar-item {
-  width: var(--sidebar-item-size);
-  height: var(--sidebar-item-size);
-
-  margin: 0 auto;
-
-  display: flex;
-  align-items: center;
-  justify-content: center;
-
-  border: var(--border-width) solid transparent;
-  border-radius: var(--radius-lg);
-
-  background: transparent;
-  color: var(--text-muted);
-
-  cursor: pointer;
-
-  transition:
-    width var(--dur-base) var(--ease-standard),
-    background var(--dur-base) var(--ease-standard),
-    color var(--dur-base) var(--ease-standard),
-    border-color var(--dur-base) var(--ease-standard);
-}
-
-.sidebar-rail--expanded .sidebar-item {
-  width: calc(100% - var(--space-4));
-  gap: var(--sidebar-item-gap);
-
-  justify-content: flex-start;
-
-  padding-left: var(--sidebar-item-padding);
-}
-
-/* ---------- Item States ---------- */
-
-.sidebar-item:hover {
-  background: var(--bg-raised);
-  color: var(--text-primary);
-}
-
-.sidebar-item--active {
-  border-color: var(--accent-brand);
-  color: var(--text-primary);
-}
-
-/* ---------- Sidebar ---------- */
-
-.sidebar-rail {
-  position: fixed;
-
-  top: calc(var(--header-height));
-  left: 0;
-  bottom: 0;
-
-  width: var(--sidebar-width-collapsed);
-
-  display: flex;
-  flex-direction: column;
-
-  background: var(--bg-void);
-
-  border-right: var(--border-width) solid var(--border-hairline);
-
-  z-index: 30;
-
-  overflow: visible;
-
-  transition: width var(--dur-base) var(--ease-standard);
-}
-
-.sidebar-rail--expanded {
-  width: var(--sidebar-width-expanded);
-}
-
-/* ---------- App name ---------- */
-
-.sidebar-app-name {
-  position: absolute;
-
-  top: var(--space-3);
-  left: var(--space-4);
-
-  height: var(--sidebar-toggle-size);
-
-  display: flex;
-  align-items: center;
-
-  font-size: var(--font-size-sm, 13px);
-  font-weight: var(--font-weight-semibold);
-  color: var(--text-primary);
+/* ---------- Label ---------- */
 
+.sidebar-label {
+  font-size: var(--font-sm);
   white-space: nowrap;
   overflow: hidden;
 
+  flex: 1 1 auto;
+  min-width: 0;
+
   opacity: 0;
-  pointer-events: none;
-
-  transition: opacity var(--dur-fast) var(--ease-standard);
-
-  z-index: 31;
-}
-
-.sidebar-rail--expanded .sidebar-app-name {
-  opacity: 1;
-  pointer-events: auto;
-  transition-delay: var(--dur-fast);
-}
-
-/* ---------- Scroll ---------- */
-
-.sidebar-scroll {
-  flex: 1;
-
-  display: flex;
-  flex-direction: column;
-  align-items: center;
-
-  gap: var(--space-1);
-
-  padding: calc(var(--sidebar-toggle-size) + var(--space-3) * 2) 0 var(--space-3);
-
-  overflow-y: auto;
-}
-
-.sidebar-rail--expanded .sidebar-scroll {
-  align-items: stretch;
-}
-
-/* ---------- Toggle ---------- */
-
-.sidebar-toggle {
-  position: absolute;
-
-  top: var(--space-3);
-  left: calc((var(--sidebar-width-collapsed) - var(--sidebar-toggle-size)) / 2);
-
-  width: var(--sidebar-toggle-size);
-  height: var(--sidebar-toggle-size);
-
-  display: flex;
-  align-items: center;
-  justify-content: center;
-
-  border: none;
-  border-radius: var(--radius-pill);
-
-  background: var(--bg-void);
-  color: var(--text-muted);
-
-  cursor: pointer;
-  padding: 0;
-
-  box-shadow: none;
+  max-width: 0;
 
   transition:
-    left var(--dur-base) var(--ease-standard),
-    background var(--dur-base) var(--ease-standard),
-    color var(--dur-base) var(--ease-standard),
-    transform var(--dur-fast) var(--ease-standard);
-
-  z-index: 32;
+    opacity var(--dur-fast) var(--ease-standard),
+    max-width var(--dur-base) var(--ease-standard);
 }
 
-.sidebar-rail--expanded .sidebar-toggle {
-  left: calc(var(--sidebar-width-expanded) - var(--sidebar-toggle-size) - var(--space-3));
-}
-
-.sidebar-toggle:hover {
-  background: var(--bg-raised);
-
-  color: var(--text-primary);
-
-  border-color: var(--accent-brand);
-}
-
-.sidebar-toggle:active {
-  transform: scale(0.92);
-}
-
-.sidebar-rail--expanded .sidebar-toggle:active {
-  transform: scale(0.92);
-}
-
-.sidebar-toggle-icon {
-  width: 14px;
-  height: 14px;
-
-  transition: transform var(--dur-base) var(--ease-standard);
-}
-
-.sidebar-rail--expanded .sidebar-toggle-icon {
-  transform: rotate(180deg);
+.sidebar-rail--expanded .sidebar-label {
+  opacity: 1;
+  max-width: 200px;
 }
 
 /* ---------- Content ---------- */
diff --git a/src/components/Sidebar/Sidebar.tsx b/src/components/Sidebar/Sidebar.tsx
index 39e8050..fa7026c 100644
--- a/src/components/Sidebar/Sidebar.tsx
+++ b/src/components/Sidebar/Sidebar.tsx
@@ -1,3 +1,4 @@
+import { useEffect, useRef } from 'react';
 import './Sidebar.css';
 import { ChevronLeftIcon } from '../../assets/icons/ChevronLeftIcon';
 
@@ -7,6 +8,29 @@ export type SidebarItem = {
   icon: React.ReactNode;
 };
 
+function SidebarButton({
+  item,
+  active,
+  onSelect,
+}: {
+  item: SidebarItem;
+  active: boolean;
+  onSelect: () => void;
+}) {
+  return (
+    <button
+      onClick={onSelect}
+      title={item.label}
+      aria-label={item.label}
+      aria-current={active ? 'page' : undefined}
+      className={'sidebar-item' + (active ? ' sidebar-item--active' : '')}
+    >
+      <span className="sidebar-icon">{item.icon}</span>
+      <span className="sidebar-label">{item.label}</span>
+    </button>
+  );
+}
+
 export default function Sidebar({
   items,
   activeId,
@@ -22,32 +46,50 @@ export default function Sidebar({
   expanded: boolean;
   onToggle: () => void;
 }) {
+  const scrollRef = useRef<HTMLDivElement>(null);
+
+  const updateFade = () => {
+    const el = scrollRef.current;
+    if (!el) return;
+    const atTop = el.scrollTop <= 1;
+    const atBottom = el.scrollTop + el.clientHeight >= el.scrollHeight - 1;
+    el.dataset.fadeTop = String(!atTop);
+    el.dataset.fadeBottom = String(!atBottom && el.scrollHeight > el.clientHeight);
+  };
+
+  useEffect(() => {
+    updateFade();
+    const el = scrollRef.current;
+    el?.addEventListener('scroll', updateFade);
+    window.addEventListener('resize', updateFade);
+    return () => {
+      el?.removeEventListener('scroll', updateFade);
+      window.removeEventListener('resize', updateFade);
+    };
+  }, [items.length]);
+
   return (
-    <nav className={`sidebar-rail ${expanded ? 'sidebar-rail--expanded' : ''}`}>
-      <span className="sidebar-app-name">{appName}</span>
+    <nav className={'sidebar-rail' + (expanded ? ' sidebar-rail--expanded' : '')}>
+      <div className="sidebar-header">
+        <span className="sidebar-app-name">{appName}</span>
+        <button
+          className="sidebar-toggle"
+          onClick={onToggle}
+          aria-label={expanded ? 'Collapse sidebar' : 'Expand sidebar'}
+          aria-expanded={expanded}
+        >
+          <ChevronLeftIcon className="sidebar-toggle-icon" />
+        </button>
+      </div>
 
-      <button
-        className="sidebar-toggle"
-        onClick={onToggle}
-        aria-label={expanded ? 'Collapse sidebar' : 'Expand sidebar'}
-        aria-expanded={expanded}
-      >
-        <ChevronLeftIcon className="sidebar-toggle-icon" />
-      </button>
-
-      <div className="sidebar-scroll">
+      <div className="sidebar-scroll" ref={scrollRef}>
         {items.map((item) => (
-          <button
+          <SidebarButton
             key={item.id}
-            onClick={() => onSelect(item.id)}
-            title={item.label}
-            aria-label={item.label}
-            aria-current={activeId === item.id ? 'page' : undefined}
-            className={`sidebar-item ${activeId === item.id ? 'sidebar-item--active' : ''}`}
-          >
-            <span className="sidebar-icon">{item.icon}</span>
-            <span className="sidebar-label">{item.label}</span>
-          </button>
+            item={item}
+            active={activeId === item.id}
+            onSelect={() => onSelect(item.id)}
+          />
         ))}
       </div>
     </nav>
diff --git a/src/components/topbar/Topbar.css b/src/components/topbar/Topbar.css
index 725d353..bd5f3da 100644
--- a/src/components/topbar/Topbar.css
+++ b/src/components/topbar/Topbar.css
@@ -69,6 +69,7 @@
 
   cursor: pointer;
   padding: 0;
+  font: inherit;
 
   background: transparent;
   border: var(--border-width-active) solid transparent;
diff --git a/src/pages/DspPage/DspPage.tsx b/src/pages/DspPage/DspPage.tsx
index f03d918..1d3783d 100644
--- a/src/pages/DspPage/DspPage.tsx
+++ b/src/pages/DspPage/DspPage.tsx
@@ -32,6 +32,101 @@ function DSPPage({
       label: 'Gain',
       icon: <KnobGainIcon />,
     },
+    {
+      id: 'gate',
+      label: 'Gate',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'compressor',
+      label: 'Compressor',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'limiter',
+      label: 'Limiter',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'delay',
+      label: 'Delay',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'matrix',
+      label: 'Matrix',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'geq',
+      label: 'Graphic Equalizer',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'ina',
+      label: 'In A',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'inb',
+      label: 'In B',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'inc',
+      label: 'In C',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'ind',
+      label: 'In D (TESTTEST)',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out1',
+      label: 'Out 1',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out2',
+      label: 'Out 2',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out3',
+      label: 'Out 3',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out4',
+      label: 'Out 4',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out5',
+      label: 'Out 5',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out6',
+      label: 'Out 6',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out7',
+      label: 'Out 7',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'out8',
+      label: 'Out 8',
+      icon: <KnobGainIcon />,
+    },
+    {
+      id: 'miscellaneous',
+      label: 'Miscellaneous',
+      icon: <KnobGainIcon />,
+    },
   ];
 
   const renderTab = () => {
diff --git a/src/styles/variables.css b/src/styles/variables.css
index c30487a..808b322 100644
--- a/src/styles/variables.css
+++ b/src/styles/variables.css
@@ -15,6 +15,10 @@
   --accent-down: #ff5c5c;
   --accent-connecting: #f5a623;
 
+  /* ---------- Type ---------- */
+  --font-ui: 'Inter', -apple-system, 'Segoe UI', sans-serif;
+  --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, monospace;
+
   /* ---------- Font ---------- */
   --font-xs: 0.75rem;
   --font-sm: 0.875rem;
@@ -50,46 +54,6 @@
   --radius-lg: 10px;
   --radius-pill: 999px;
 
-  /* ---------- Header ---------- */
-  --header-height: 50px;
-  --font-size-header: 1rem;
-
-  --tab-height: calc(var(--header-height) * 0.75);
-
-  /* ---------- Card ---------- */
-  --card-width: 500px;
-  --card-control-height: 36px;
-
-  /* ---------- Button ---------- */
-  --disabled-opacity: 0.45;
-
-  /* ---------- 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;
-
   /* ---------- Motion ---------- */
   --dur-fast: 100ms;
   --dur-base: 180ms;
@@ -106,8 +70,20 @@
   --transition-fast: 120ms;
   --transition-base: 180ms;
 
-  --font-button: 1.5vh;
-  --font-label: 1.4vh;
-  --font-title: 1.8vh;
-  --font-value: 1.6vh;
+  /* ---------- Header ---------- */
+  --header-height: 50px;
+  --font-size-header: 1rem;
+
+  --tab-height: calc(var(--header-height) * 0.75);
+
+  /* ---------- Card ---------- */
+  --card-width: 500px;
+  --card-control-height: 36px;
+
+  /* ---------- Button ---------- */
+  --disabled-opacity: 0.45;
+
+  /* ---------- SideBar ---------- */
+  --sidebar-width-collapsed: calc(var(--header-height) * 0.85 + 2 * var(--space-3));
+  --sidebar-width-expanded: 200px;
 }