/* ==========================================================================
   ThockBar — Modern Apple-Style Shared Stylesheet
   Designed with Apple Human Interface Guidelines & Fluid Motion Principles
   ========================================================================== */

/* --- Custom Properties / Design Tokens --- */
:root {
  /* Color Palette — Light Mode First */
  --bg-page: #FCF9FF;
  --bg-page-subtle: #F6F2FB;
  --bg-surface: #FFFFFF;
  --bg-surface-elevated: #FFFFFF;
  --bg-surface-translucent: rgba(255, 255, 255, 0.72);
  --bg-nav: rgba(252, 249, 255, 0.82);
  --bg-badge: rgba(29, 29, 31, 0.04);
  --bg-pill-hover: rgba(29, 29, 31, 0.05);

  /* Typography Colors */
  --text-primary: #1D1D1F;
  --text-secondary: #6E6E73;
  --text-tertiary: #86868B;
  --text-inverse: #FFFFFF;

  /* Accents — Warm Amber / Brass / Mechanical Switch Tones */
  --accent-amber: #B46B38;
  --accent-amber-light: #FBF4EE;
  --accent-amber-glow: rgba(180, 107, 56, 0.18);
  --accent-apple-blue: #0071E3;
  --accent-apple-blue-hover: #0077ED;
  --accent-charcoal: #2C2C2E;

  /* Switch Category Tones */
  --switch-linear: #E84D74;
  --switch-tactile: #F37021;
  --switch-clicky: #0071E3;
  --switch-novelty: #9E5AE8;

  /* Borders & Hairlines */
  --border-subtle: rgba(29, 29, 31, 0.07);
  --border-glass: rgba(255, 255, 255, 0.85);
  --border-card: rgba(29, 29, 31, 0.06);
  --border-active: rgba(29, 29, 31, 0.2);

  /* Elevation Shadows */
  --shadow-subtle: 0 1px 3px rgba(0, 0, 0, 0.03), 0 4px 12px rgba(0, 0, 0, 0.02);
  --shadow-card: 0 2px 8px -2px rgba(29, 29, 31, 0.04), 0 12px 32px -8px rgba(29, 29, 31, 0.06);
  --shadow-card-hover: 0 4px 14px -2px rgba(29, 29, 31, 0.06), 0 20px 48px -10px rgba(29, 29, 31, 0.1);
  --shadow-popover: 0 24px 60px -12px rgba(29, 29, 31, 0.14), 0 8px 24px -4px rgba(29, 29, 31, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.04);
  --shadow-keycap: 0 3px 0 #D1CFD7, 0 4px 8px rgba(0, 0, 0, 0.06);
  --shadow-keycap-pressed: 0 1px 0 #D1CFD7, 0 2px 4px rgba(0, 0, 0, 0.04);

  /* Radius (Squircle-friendly) */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-pill: 9999px;

  /* Motion & Springs */
  --spring-snappy: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  --spring-press: 0.1s cubic-bezier(0, 0, 0.2, 1);
  --transition-smooth: 0.25s ease;

  /* Layout */
  --nav-height: 56px;
  --container-max: 1120px;
  --container-reading: 740px;
}

/* --- Dark Mode Subtle Adaptation (while remaining Light-First) --- */
@media (prefers-color-scheme: dark) {
  :root {
    --bg-page: #121214;
    --bg-page-subtle: #18181B;
    --bg-surface: #1E1E22;
    --bg-surface-elevated: #24242A;
    --bg-surface-translucent: rgba(30, 30, 34, 0.78);
    --bg-nav: rgba(18, 18, 20, 0.82);
    --bg-badge: rgba(255, 255, 255, 0.08);
    --bg-pill-hover: rgba(255, 255, 255, 0.1);

    --text-primary: #F5F5F7;
    --text-secondary: #A1A1A6;
    --text-tertiary: #75757A;
    --text-inverse: #1D1D1F;

    --border-subtle: rgba(255, 255, 255, 0.09);
    --border-glass: rgba(255, 255, 255, 0.12);
    --border-card: rgba(255, 255, 255, 0.08);

    --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.4);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.5);
    --shadow-popover: 0 24px 60px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.1);
    --shadow-keycap: 0 3px 0 #0E0E10, 0 4px 8px rgba(0, 0, 0, 0.4);
    --shadow-keycap-pressed: 0 1px 0 #0E0E10, 0 2px 4px rgba(0, 0, 0, 0.3);
  }
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 24px);
  background-color: var(--bg-page);
  color: var(--text-primary);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-size: 1.0625rem;
  line-height: 1.55;
  color: var(--text-primary);
  background: var(--bg-page);
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Typography Hierarchy with Optical Tracking */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", sans-serif;
  font-feature-settings: "cv02", "cv03", "cv04", "cv11";
  text-wrap: balance;
}

h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 650;
  line-height: 1.06;
  letter-spacing: -0.028em;
}

h2 {
  font-size: clamp(1.8rem, 3.8vw, 2.75rem);
  font-weight: 600;
  line-height: 1.14;
  letter-spacing: -0.022em;
}

h3 {
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

p {
  color: var(--text-secondary);
  font-size: 1.0625rem;
  line-height: 1.55;
  text-wrap: pretty;
}

p.lead {
  font-size: clamp(1.15rem, 2vw, 1.35rem);
  line-height: 1.45;
  color: var(--text-secondary);
  font-weight: 400;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-smooth);
}

img, svg {
  display: block;
  max-width: 100%;
}

button {
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
  color: inherit;
}

/* --- Layout Containers --- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.container-reading {
  width: 100%;
  max-width: var(--container-reading);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --- Navigation Bar (Apple Frosted Glass) --- */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: var(--bg-nav);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-smooth), border-color var(--transition-smooth);
}

.site-nav .nav-container {
  max-width: var(--container-max);
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  user-select: none;
}

.nav-brand .brand-icon {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  object-fit: cover;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
  display: inline-block;
  vertical-align: middle;
}

.nav-brand .brand-icon-fallback {
  width: 28px;
  height: 28px;
  border-radius: 7px;
  background: linear-gradient(135deg, #2C2C2E, #1A1A1C);
  color: #FFFFFF;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 450;
  color: var(--text-secondary);
  transition: color 0.18s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text-primary);
}

.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 1.5px;
  background-color: var(--text-primary);
  border-radius: 1px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Mobile Hamburger Menu Toggle */
.nav-mobile-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
  background: transparent;
  transition: background-color var(--transition-smooth);
}

.nav-mobile-toggle:hover {
  background: var(--bg-badge);
}

.nav-mobile-toggle svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

/* Mobile Drawer Overlay */
.mobile-nav-drawer {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 24px;
  box-shadow: 0 16px 32px rgba(0, 0, 0, 0.08);
  flex-direction: column;
  gap: 16px;
  z-index: 999;
  animation: slideDownMobile 0.25s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.mobile-nav-drawer.open {
  display: flex;
}

.mobile-nav-drawer a {
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--text-primary);
  padding: 10px 0;
  border-bottom: 1px solid var(--border-subtle);
}

@keyframes slideDownMobile {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* --- Apple-Style Buttons & Pills --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  text-align: center;
  white-space: nowrap;
  user-select: none;
  transition: transform var(--spring-press), background-color var(--transition-smooth), box-shadow var(--transition-smooth), opacity var(--transition-smooth);
}

/* The Apple Fluid Rule: instant scale(0.97) on pointer-down */
.btn:active {
  transform: scale(0.97) !important;
  transition: transform 100ms ease-out;
}

.btn-primary {
  background-color: var(--text-primary);
  color: var(--text-inverse);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.btn-primary:hover {
  background-color: #000000;
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.14);
  transform: translateY(-1px);
}

@media (prefers-color-scheme: dark) {
  .btn-primary:hover {
    background-color: #FFFFFF;
  }
}

.btn-secondary {
  background-color: var(--bg-badge);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn-secondary:hover {
  background-color: var(--bg-pill-hover);
  border-color: var(--border-active);
  transform: translateY(-1px);
}

.btn-appstore {
  background: var(--text-primary);
  color: #FFFFFF;
  padding: 12px 24px;
  font-size: 0.975rem;
  font-weight: 500;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

.btn-appstore:hover {
  background: #000000;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.16);
  transform: translateY(-1px);
}

/* Official Apple App Store Badge */
.app-store-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  line-height: 0;
  border-radius: 8px;
  transition: transform var(--spring-press), filter var(--transition-smooth), opacity var(--transition-smooth);
  user-select: none;
}

.app-store-badge svg {
  height: 42px;
  width: auto;
  border-radius: 8px;
  display: block;
}

.app-store-badge:hover {
  transform: translateY(-1px);
}

.app-store-badge:active {
  transform: scale(0.97) !important;
  transition: transform 100ms ease-out;
}

.app-store-badge-header svg {
  height: 34px;
}

.btn-sm {
  padding: 7px 14px;
  font-size: 0.8125rem;
}

.btn-icon {
  width: 34px;
  height: 34px;
  padding: 0;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* --- Pill Badges & Chips --- */
.badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: var(--bg-badge);
  border: 1px solid var(--border-subtle);
  font-size: 0.775rem;
  font-weight: 550;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.badge-pill.amber {
  background: var(--accent-amber-light);
  color: var(--accent-amber);
  border-color: rgba(180, 107, 56, 0.2);
}

.badge-pill.apple {
  background: rgba(0, 113, 227, 0.08);
  color: var(--accent-apple-blue);
  border-color: rgba(0, 113, 227, 0.18);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: #34C759; /* Apple active green */
  box-shadow: 0 0 6px rgba(52, 199, 89, 0.5);
}

/* --- Hero Section --- */
.hero-section {
  padding-top: clamp(48px, 8vw, 84px);
  padding-bottom: clamp(40px, 6vw, 72px);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero-glow-bg {
  position: absolute;
  top: -150px;
  left: 50%;
  transform: translateX(-50%);
  width: 800px;
  height: 480px;
  background: radial-gradient(50% 50% at 50% 50%, rgba(180, 107, 56, 0.08) 0%, rgba(246, 242, 251, 0) 100%);
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 840px;
  margin: 0 auto;
}

.hero-headline {
  margin-top: 18px;
  margin-bottom: 18px;
}

.hero-subheadline {
  max-width: 640px;
  margin: 0 auto 32px auto;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  line-height: 1.48;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-meta-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-top: 8px;
}

.hero-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

/* --- macOS Mockup Window & Interactive Popover Preview --- */
.hero-visual-frame {
  margin-top: clamp(36px, 5vw, 54px);
  position: relative;
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.macos-desktop-mock {
  background: linear-gradient(180deg, #EBE6F3 0%, #DFD9E8 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-subtle);
  padding: 12px;
  box-shadow: 0 20px 60px -15px rgba(29, 29, 31, 0.12), 0 0 0 1px rgba(0, 0, 0, 0.03);
  position: relative;
}

@media (prefers-color-scheme: dark) {
  .macos-desktop-mock {
    background: linear-gradient(180deg, #1C1C20 0%, #161619 100%);
    border-color: rgba(255, 255, 255, 0.08);
  }
}

/* Simulated macOS Menu Bar Strip */
.macos-menubar-strip {
  height: 32px;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(24px) saturate(180%);
  -webkit-backdrop-filter: blur(24px) saturate(180%);
  border-radius: 14px 14px 6px 6px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 14px;
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--text-primary);
  user-select: none;
}

@media (prefers-color-scheme: dark) {
  .macos-menubar-strip {
    background: rgba(40, 40, 45, 0.65);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
}

.menubar-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.apple-glyph {
  font-size: 13px;
  display: inline-block;
  opacity: 0.9;
}

.menubar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.75rem;
}

.menubar-tockbar-item {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 3px 8px;
  border-radius: 5px;
  background: rgba(0, 0, 0, 0.08);
  cursor: pointer;
  font-weight: 600;
}

@media (prefers-color-scheme: dark) {
  .menubar-tockbar-item {
    background: rgba(255, 255, 255, 0.12);
  }
}

/* Desktop Canvas Area */
.macos-desktop-canvas {
  min-height: 480px;
  padding: 32px 16px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  position: relative;
  background: radial-gradient(circle at 50% 20%, rgba(255, 255, 255, 0.6), transparent 70%);
}

/* Floating ThockBar Popover */
.popover-container {
  width: 334px;
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-popover);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(30px) saturate(190%);
  -webkit-backdrop-filter: blur(30px) saturate(190%);
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 10;
  overflow: hidden;
  text-align: left;
}

@media (prefers-color-scheme: dark) {
  .popover-container {
    background: rgba(28, 28, 32, 0.88);
    border-color: rgba(255, 255, 255, 0.12);
  }
}

/* Popover Top Arrow (macOS indicator) */
.popover-arrow {
  position: absolute;
  top: -6px;
  right: 68px;
  width: 12px;
  height: 12px;
  background: var(--bg-surface);
  transform: rotate(45deg);
  border-left: 1px solid var(--border-glass);
  border-top: 1px solid var(--border-glass);
  z-index: 11;
}

@media (prefers-color-scheme: dark) {
  .popover-arrow {
    background: rgba(28, 28, 32, 0.95);
    border-color: rgba(255, 255, 255, 0.12);
  }
}

.popover-header {
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--border-subtle);
}

.popover-header-left {
  display: flex;
  align-items: center;
  gap: 8px;
}

.popover-app-icon {
  width: 24px;
  height: 24px;
  border-radius: 6px;
  object-fit: cover;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.popover-title-wrap h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.1;
}

.popover-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.65rem;
  color: var(--text-secondary);
}

/* macOS Switch Toggle */
.macos-switch {
  position: relative;
  display: inline-block;
  width: 32px;
  height: 18px;
}

.macos-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.macos-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #E5E5EA;
  transition: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 18px;
}

.macos-slider::before {
  position: absolute;
  content: "";
  height: 14px;
  width: 14px;
  left: 2px;
  bottom: 2px;
  background-color: white;
  transition: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  border-radius: 50%;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.macos-switch input:checked + .macos-slider {
  background-color: #34C759;
}

.macos-switch input:checked + .macos-slider::before {
  transform: translateX(14px);
}

/* Master Volume Slider Row */
.popover-volume-row {
  padding: 10px 14px;
  background: var(--bg-badge);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.volume-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.725rem;
  font-weight: 550;
  color: var(--text-secondary);
}

.volume-slider-wrap {
  display: flex;
  align-items: center;
  gap: 8px;
}

.volume-slider-wrap svg {
  width: 14px;
  height: 14px;
  color: var(--text-tertiary);
  flex-shrink: 0;
}

.apple-range-slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: rgba(0, 0, 0, 0.1);
  outline: none;
  transition: background 0.2s;
}

@media (prefers-color-scheme: dark) {
  .apple-range-slider {
    background: rgba(255, 255, 255, 0.18);
  }
}

.apple-range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: #FFFFFF;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
  cursor: pointer;
  transition: transform 0.1s ease;
}

.apple-range-slider::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

/* Scrollable Popover Content */
.popover-body {
  padding: 12px 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.popover-card-mini {
  background: var(--bg-badge);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 9px 10px;
}

.popover-section-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: 6px;
}

/* Switch Profile Selector Pills */
.profile-pill-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 5px;
}

.profile-pill-btn {
  padding: 6px 4px;
  font-size: 0.725rem;
  font-weight: 500;
  border-radius: 6px;
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
  text-align: center;
  transition: all 0.15s ease;
}

.profile-pill-btn:hover {
  color: var(--text-primary);
  background: var(--bg-surface);
}

.profile-pill-btn.active {
  color: var(--text-primary);
  background: var(--bg-surface);
  font-weight: 600;
  border-color: var(--border-subtle);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

/* Interactive 2D Tone Pad Component */
.tone-pad-card {
  background: var(--bg-badge);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 10px;
}

.tone-pad-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}

.tone-descriptor-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 10px;
  background: var(--bg-surface);
  color: var(--accent-amber);
  border: 1px solid var(--border-subtle);
}

.tone-pad-surface {
  width: 100%;
  height: 110px;
  background: linear-gradient(135deg, rgba(180, 107, 56, 0.08) 0%, rgba(0, 113, 227, 0.06) 100%), var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  position: relative;
  cursor: crosshair;
  overflow: hidden;
  touch-action: none;
  user-select: none;
}

/* Axis Crosshairs & Labels */
.tone-pad-axis-x {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(0, 0, 0, 0.06);
}

.tone-pad-axis-y {
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: rgba(0, 0, 0, 0.06);
}

.tone-label {
  position: absolute;
  font-size: 0.6rem;
  font-weight: 550;
  letter-spacing: 0.03em;
  color: var(--text-tertiary);
  pointer-events: none;
}

.tone-label.left { left: 8px; top: 50%; transform: translateY(-50%); }
.tone-label.right { right: 8px; top: 50%; transform: translateY(-50%); }
.tone-label.top { top: 6px; left: 50%; transform: translateX(-50%); }
.tone-label.bottom { bottom: 6px; left: 50%; transform: translateX(-50%); }

/* Draggable Tone Puck */
.tone-puck {
  position: absolute;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--text-primary);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.25), 0 0 0 2px #FFFFFF;
  transform: translate(-50%, -50%);
  top: 50%;
  left: 50%;
  cursor: grab;
  transition: transform 0.08s ease-out;
}

.tone-puck:active {
  cursor: grabbing;
  transform: translate(-50%, -50%) scale(1.2);
}

/* Virtual Test Keycaps in Popover */
.interactive-test-row {
  margin-top: 4px;
}

.keycaps-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.keycap-btn {
  flex: 1;
  padding: 8px 4px;
  border-radius: 6px;
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-keycap);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  user-select: none;
  cursor: pointer;
  transition: transform 0.06s ease, box-shadow 0.06s ease;
}

.keycap-btn:active,
.keycap-btn.pressed {
  transform: translateY(2px);
  box-shadow: var(--shadow-keycap-pressed);
  background: var(--bg-badge);
}

.popover-footer {
  padding: 8px 14px;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--text-tertiary);
}

.offline-badge-pill {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #34C759;
  font-weight: 550;
}

/* --- Section Dividers & Headers --- */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto clamp(36px, 6vw, 56px) auto;
}

.section-eyebrow {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-amber);
  margin-bottom: 10px;
  display: block;
}

.section-title {
  margin-bottom: 14px;
}

.section-desc {
  font-size: 1.125rem;
}

/* --- Bento Grid Section (Features) --- */
.features-section {
  padding-top: clamp(48px, 8vw, 84px);
  padding-bottom: clamp(48px, 8vw, 84px);
  position: relative;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

/* Bento Cards */
.bento-card {
  background: var(--bg-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  padding: clamp(24px, 3.5vw, 36px);
  display: flex;
  flex-direction: column;
  position: relative;
  overflow: hidden;
  transition: transform var(--spring-snappy), box-shadow var(--spring-snappy), border-color var(--transition-smooth);
}

.bento-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(29, 29, 31, 0.12);
}

@media (prefers-color-scheme: dark) {
  .bento-card:hover {
    border-color: rgba(255, 255, 255, 0.16);
  }
}

/* Bento Sizes */
.bento-card.col-8 {
  grid-column: span 8;
}

.bento-card.col-4 {
  grid-column: span 4;
}

.bento-card.col-6 {
  grid-column: span 6;
}

.bento-card.col-12 {
  grid-column: span 12;
}

.card-icon-wrap {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: var(--bg-badge);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: var(--text-primary);
}

.card-icon-wrap svg {
  width: 22px;
  height: 22px;
}

.bento-card h3 {
  margin-bottom: 10px;
}

.bento-card p {
  color: var(--text-secondary);
  font-size: 0.975rem;
  line-height: 1.5;
  margin-bottom: 20px;
}

/* Visualizer inside Bento Cards */
.card-visualizer {
  margin-top: auto;
  border-radius: var(--radius-md);
  background: var(--bg-page-subtle);
  border: 1px solid var(--border-subtle);
  overflow: hidden;
  padding: 16px;
  position: relative;
}

/* 1. Dual-Event Visualizer (Up / Down) */
.dual-event-visualizer {
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 16px;
  padding: 12px 6px;
}

.dual-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 8px;
  flex: 1;
}

.dual-switch-stem {
  width: 44px;
  height: 48px;
  background: var(--bg-surface);
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--accent-amber);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.dual-step.down:hover .dual-switch-stem {
  transform: translateY(6px);
  background: var(--accent-amber-light);
}

.dual-step.up:hover .dual-switch-stem {
  transform: translateY(-4px);
  background: rgba(0, 113, 227, 0.08);
  color: var(--accent-apple-blue);
}

.step-label {
  font-size: 0.775rem;
  font-weight: 600;
  color: var(--text-primary);
}

.step-sub {
  font-size: 0.7rem;
  color: var(--text-tertiary);
}

/* 2. Waveform & Latency Bar Visualizer */
.latency-meter-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.latency-metric-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.latency-number {
  font-size: 2.2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-primary);
}

.latency-unit {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-left: 2px;
}

.latency-bar-track {
  height: 8px;
  background: var(--border-subtle);
  border-radius: 4px;
  overflow: hidden;
  position: relative;
}

.latency-bar-fill {
  height: 100%;
  width: 14%;
  background: linear-gradient(90deg, #34C759, #30D158);
  border-radius: 4px;
}

/* 3. Switch Samples Tag Cloud */
.switch-tags-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
}

.switch-tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 11px;
  border-radius: var(--radius-pill);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  font-size: 0.775rem;
  font-weight: 500;
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.02);
}

.switch-tag-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.switch-tag-dot.pink { background-color: var(--switch-linear); }
.switch-tag-dot.orange { background-color: var(--switch-tactile); }
.switch-tag-dot.blue { background-color: var(--switch-clicky); }
.switch-tag-dot.purple { background-color: var(--switch-novelty); }

/* --- Privacy Callout Section --- */
.privacy-callout-section {
  padding-top: clamp(40px, 6vw, 64px);
  padding-bottom: clamp(60px, 8vw, 96px);
}

.privacy-banner-card {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.95) 0%, rgba(250, 247, 255, 0.95) 100%);
  border-radius: var(--radius-xl);
  border: 1px solid var(--border-card);
  box-shadow: var(--shadow-card);
  padding: clamp(32px, 5vw, 48px);
  display: flex;
  align-items: center;
  gap: clamp(24px, 4vw, 48px);
  position: relative;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .privacy-banner-card {
    background: linear-gradient(135deg, rgba(30, 30, 34, 0.95) 0%, rgba(22, 22, 26, 0.95) 100%);
  }
}

.privacy-shield-icon-wrap {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  background: var(--accent-amber-light);
  border: 1px solid rgba(180, 107, 56, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-amber);
  flex-shrink: 0;
  box-shadow: 0 8px 24px var(--accent-amber-glow);
}

.privacy-shield-icon-wrap svg {
  width: 40px;
  height: 40px;
}

.privacy-banner-content h3 {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  font-weight: 650;
  line-height: 1.2;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.privacy-banner-content p {
  font-size: 1.05rem;
  margin-bottom: 18px;
}

.privacy-checklist {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

.privacy-check-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-primary);
}

.privacy-check-item svg {
  width: 16px;
  height: 16px;
  color: #34C759;
  flex-shrink: 0;
}

/* --- Legal / Reading Document Page Styles (Privacy & Terms) --- */
.legal-page-header {
  padding-top: clamp(48px, 7vw, 76px);
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-subtle);
  margin-bottom: 40px;
}

.legal-breadcrumbs {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  margin-bottom: 16px;
}

.legal-breadcrumbs a {
  color: var(--text-secondary);
}

.legal-breadcrumbs a:hover {
  color: var(--text-primary);
}

.legal-title {
  margin-bottom: 12px;
}

.legal-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* Summary Callout Box in Legal Pages */
.legal-summary-card {
  background: var(--accent-amber-light);
  border: 1px solid rgba(180, 107, 56, 0.2);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  margin-bottom: 36px;
  color: var(--text-primary);
}

.legal-summary-card h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-amber);
  margin-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.legal-summary-card p {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-primary);
}

/* Legal Content Body */
.legal-content {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding-bottom: 72px;
}

.legal-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.legal-section h3 {
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-subtle);
}

.legal-section p {
  font-size: 1rem;
  line-height: 1.62;
  color: var(--text-secondary);
}

.legal-section ul {
  padding-left: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.legal-section li {
  font-size: 0.975rem;
  line-height: 1.55;
  color: var(--text-secondary);
}

.legal-section li strong {
  color: var(--text-primary);
}

.contact-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 12px;
}

.contact-card a {
  color: var(--accent-apple-blue);
  font-weight: 500;
}

.contact-card a:hover {
  text-decoration: underline;
}

/* --- Footer --- */
.site-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-page);
  padding: 48px 0 36px 0;
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border-subtle);
}

.footer-brand-wrap {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 320px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.95rem;
}

.footer-brand img {
  width: 22px;
  height: 22px;
  border-radius: 5px;
}

.footer-nav-columns {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
}

.footer-col h5 {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-col a {
  color: var(--text-secondary);
  transition: color 0.15s ease;
}

.footer-col a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-bottom-links {
  display: flex;
  align-items: center;
  gap: 18px;
}

.footer-bottom-links a {
  color: var(--text-tertiary);
}

.footer-bottom-links a:hover {
  color: var(--text-primary);
}

/* --- Accessibility & Reduced Motion (Apple Design Guidelines) --- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .bento-card:hover {
    transform: none !important;
  }
  .btn:active, .keycap-btn:active {
    transform: none !important;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-nav,
  .macos-menubar-strip,
  .popover-container {
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    background-color: var(--bg-surface) !important;
  }
}

/* --- Responsive Media Queries --- */
@media (max-width: 900px) {
  .bento-card.col-8,
  .bento-card.col-4,
  .bento-card.col-6 {
    grid-column: span 12;
  }
  .privacy-banner-card {
    flex-direction: column;
    text-align: center;
  }
  .privacy-checklist {
    justify-content: center;
    text-align: left;
  }
}

@media (max-width: 768px) {
  .nav-links,
  .nav-actions .btn-appstore-header {
    display: none;
  }
  .nav-mobile-toggle {
    display: inline-flex;
  }
  .hero-meta-note {
    flex-direction: column;
    gap: 6px;
  }
  .footer-top {
    flex-direction: column;
    gap: 24px;
  }
  .footer-nav-columns {
    gap: 32px;
  }
}