/* ============================================
   VidLode — Cyber-Global Design System
   Based on DESIGN.md · Mobile-First
   ============================================ */

:root {
  /* Surface hierarchy */
  --bg: #0e1224;
  --surface-dim: #0e1224;
  --surface: #0e1224;
  --surface-container-lowest: #090d1f;
  --surface-container-low: #161b2d;
  --surface-container: #1b1f31;
  --surface-container-high: #25293c;
  --surface-container-highest: #303447;
  --surface-bright: #34384c;
  --surface-dark: #16161E;
  --surface-light: #414868;
  --surface-variant: #303447;

  /* On-surface (text) */
  --on-surface: #dee1fb;
  --on-surface-variant: #c8c5cc;
  --on-background: #dee1fb;

  /* Primary */
  --primary: #c6c5d4;
  --on-primary: #2f303b;
  --primary-container: #1a1b26;
  --on-primary-container: #838391;

  /* Secondary — primary action color */
  --secondary: #bbc3ff;
  --on-secondary: #001d93;
  --secondary-container: #0231de;
  --on-secondary-container: #b1bbff;

  /* Cyber Purple — brand accent */
  --cyber-purple: #7AA2F7;
  --cyber-purple-glow: rgba(122, 162, 247, 0.6);

  /* Tertiary — neon pink for highlights */
  --tertiary: #ffb1c3;
  --on-tertiary: #66002c;
  --tertiary-container: #3f0019;
  --on-tertiary-container: #ff0c7b;

  /* Status */
  --terminal-green: #41D6B4;
  --error: #ffb4ab;
  --on-error: #690005;
  --error-container: #93000a;
  --on-error-container: #ffdad6;
  --success: #10B981;

  /* Outline */
  --outline: #919096;
  --outline-variant: #47464c;

  /* Spacing */
  --gutter: 16px;
  --stack-sm: 12px;
  --stack-md: 24px;
  --stack-lg: 48px;
  --topbar-h: 48px;
  --navbar-h: 64px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);

  /* Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-full: 9999px;

  /* Shadows */
  --glow-purple: 0 0 8px rgba(122, 162, 247, 0.6);
  --glow-pink: 0 0 8px rgba(255, 12, 123, 0.5);
  --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.3);
  --shadow-nav: 0 -4px 12px rgba(0, 0, 0, 0.5);
}

/* Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-family: 'Geist', -apple-system, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
  color-scheme: dark;
}

body {
  background: var(--bg);
  color: var(--on-surface);
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

.mono { font-family: 'JetBrains Mono', 'Cascadia Code', monospace; }

/* ============================================
   Top Bar
   ============================================ */
.topbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--topbar-h);
  background: var(--surface-container);
  border-bottom: 1px solid var(--outline-variant);
  display: flex;
  align-items: center;
  padding: 0 var(--gutter);
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.topbar-brand {
  font-family: 'Geist', sans-serif;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.02em;
  color: var(--on-surface);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 6px;
}

.topbar-brand .logo-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cyber-purple);
  box-shadow: var(--glow-purple);
}

/* ============================================
   Bottom Navigation (Mobile)
   ============================================ */
.bottom-nav {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  height: calc(var(--navbar-h) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: var(--surface-container);
  border-top: 1px solid var(--outline-variant);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-nav);
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 6px 12px;
  min-width: 64px;
  color: var(--on-surface-variant);
  text-decoration: none;
  transition: color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.nav-item .nav-icon {
  font-size: 24px;
  font-family: 'Material Symbols Outlined';
  font-weight: 400;
  font-variation-settings: 'FILL' 0;
}

.nav-item .nav-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.nav-item.active {
  color: var(--secondary);
}

.nav-item.active .nav-icon {
  font-variation-settings: 'FILL' 1;
}

.nav-item.active .nav-label {
  font-weight: 700;
}

/* Hide bottom nav on desktop */
@media (min-width: 768px) {
  .bottom-nav { display: none; }
  .topbar { padding: 0 32px; }
}

/* ============================================
   Main Content Area
   ============================================ */
.main-content {
  flex: 1;
  padding-top: var(--topbar-h);
  padding-bottom: calc(var(--navbar-h) + var(--safe-bottom) + var(--stack-md));
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

@media (min-width: 768px) {
  .main-content {
    padding-bottom: var(--stack-lg);
    max-width: 800px;
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
  }
}

/* ============================================
   Components
   ============================================ */

/* Glass Panel */
.glass-panel {
  background: rgba(22, 27, 45, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
}

/* URL Input */
.url-input-wrapper {
  position: relative;
  width: 100%;
}

.url-input {
  width: 100%;
  height: 52px;
  padding: 0 52px 0 16px;
  background: var(--surface-container-high);
  border: 2px solid var(--outline-variant);
  border-radius: var(--radius-xl);
  color: var(--on-surface);
  font-family: 'Geist', sans-serif;
  font-size: 15px;
  transition: border-color 0.3s, box-shadow 0.3s;
  outline: none;
}

.url-input::placeholder {
  color: var(--on-surface-variant);
  opacity: 0.6;
}

.url-input:focus {
  border-color: var(--cyber-purple);
  box-shadow: var(--glow-purple);
}

.url-input.parsing {
  border-color: var(--cyber-purple);
  animation: shimmer 1.5s ease-in-out infinite;
}

@keyframes shimmer {
  0%, 100% { box-shadow: 0 0 4px rgba(122, 162, 247, 0.3); }
  50% { box-shadow: 0 0 16px rgba(122, 162, 247, 0.7); }
}

.paste-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 40px; height: 40px;
  border-radius: var(--radius-full);
  background: var(--secondary-container);
  color: var(--on-secondary-container);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Material Symbols Outlined';
  font-size: 20px;
  transition: transform 0.15s, opacity 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.paste-btn:active { transform: translateY(-50%) scale(0.92); }
.paste-btn:disabled { opacity: 0.4; pointer-events: none; }

/* CTA Button */
.cta-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 52px;
  background: linear-gradient(135deg, var(--secondary-container), var(--cyber-purple));
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  font-family: 'Geist', sans-serif;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.3s;
  box-shadow: var(--glow-purple);
  -webkit-tap-highlight-color: transparent;
}

.cta-btn:active { transform: scale(0.97); }
.cta-btn:disabled { opacity: 0.5; pointer-events: none; box-shadow: none; }

/* Platform Grid */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--stack-sm);
}

.platform-card {
  aspect-ratio: 1;
  background: var(--surface-container-high);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  cursor: pointer;
  transition: border-color 0.2s, transform 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.platform-card:hover,
.platform-card:active {
  border-color: var(--cyber-purple);
  transform: scale(0.96);
}

.platform-card .platform-icon {
  font-size: 28px;
  font-family: 'Material Symbols Outlined';
}

.platform-card .platform-name {
  font-size: 10px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--on-surface-variant);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

/* Step Card */
.step-card {
  display: flex;
  gap: 12px;
  padding: 16px;
  background: var(--surface-container);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
}

.step-number {
  flex-shrink: 0;
  width: 32px; height: 32px;
  border-radius: 50%;
  background: var(--surface-container-highest);
  color: var(--cyber-purple);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13px;
  font-weight: 700;
}

/* Quality Selector */
.quality-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  background: var(--surface-container);
  border: 2px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: border-color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.quality-option.selected {
  border-color: var(--cyber-purple);
  box-shadow: var(--glow-purple);
}

.quality-option .quality-radio {
  width: 20px; height: 20px;
  border-radius: 50%;
  border: 2px solid var(--outline);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: border-color 0.2s;
}

.quality-option.selected .quality-radio {
  border-color: var(--cyber-purple);
}

.quality-option.selected .quality-radio::after {
  content: '';
  width: 10px; height: 10px;
  border-radius: 50%;
  background: var(--cyber-purple);
}

.quality-label {
  font-family: 'Geist', sans-serif;
  font-size: 15px;
  font-weight: 600;
  color: var(--on-surface);
}

.quality-info {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--on-surface-variant);
  margin-left: auto;
}

/* Progress Bar */
.progress-bar {
  width: 100%;
  height: 6px;
  background: var(--surface-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: var(--cyber-purple);
  border-radius: var(--radius-full);
  box-shadow: var(--glow-purple);
  transition: width 0.3s ease;
}

/* Download Card */
.download-card {
  display: flex;
  gap: 12px;
  padding: 12px;
  background: var(--surface-dark);
  border: 1px solid var(--outline-variant);
  border-radius: var(--radius-lg);
  transition: border-color 0.2s;
}

.download-card:hover { border-color: var(--outline); }

.download-thumb {
  width: 80px; height: 56px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--surface-container);
  position: relative;
}

.download-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
}

.download-meta {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
}

.download-title {
  font-family: 'Geist', sans-serif;
  font-size: 14px;
  font-weight: 600;
  color: var(--on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.download-info {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  color: var(--on-surface-variant);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Status Badge */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  font-weight: 500;
}

.status-badge.complete {
  background: rgba(65, 214, 180, 0.15);
  color: var(--terminal-green);
}

.status-badge.downloading {
  background: rgba(122, 162, 247, 0.15);
  color: var(--cyber-purple);
}

/* Toast */
.toast {
  position: fixed;
  bottom: calc(var(--navbar-h) + var(--safe-bottom) + 16px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--surface-container-highest);
  color: var(--on-surface);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  font-family: 'Geist', sans-serif;
  font-size: 14px;
  font-weight: 600;
  box-shadow: var(--shadow-card);
  z-index: 200;
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
  pointer-events: none;
}

.toast.error {
  background: var(--error-container);
  color: var(--on-error-container);
}

.toast.success {
  background: rgba(16, 185, 129, 0.2);
  color: var(--success);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(20px); }
  to { opacity: 1; transform: translateX(-50%) translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; }
  to { opacity: 0; }
}

/* Skeleton */
.skeleton {
  background: linear-gradient(90deg, var(--surface-container-high) 25%, var(--surface-container-highest) 50%, var(--surface-container-high) 75%);
  background-size: 200% 100%;
  animation: skeleton-load 1.5s ease-in-out infinite;
  border-radius: var(--radius-md);
}

@keyframes skeleton-load {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* Section Header */
.section-title {
  font-family: 'Geist', sans-serif;
  font-size: 20px;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: var(--stack-sm);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px 24px;
  text-align: center;
}

.empty-state .empty-icon {
  font-family: 'Material Symbols Outlined';
  font-size: 64px;
  color: var(--on-surface-variant);
  opacity: 0.3;
  margin-bottom: 16px;
}

.empty-state .empty-title {
  font-family: 'Geist', sans-serif;
  font-size: 18px;
  font-weight: 700;
  color: var(--on-surface-variant);
  margin-bottom: 8px;
}

.empty-state .empty-desc {
  font-size: 14px;
  color: var(--on-surface-variant);
  opacity: 0.6;
}

/* Utilities */
.flex-center { display: flex; align-items: center; justify-content: center; }
.text-center { text-align: center; }
.mt-sm { margin-top: var(--stack-sm); }
.mt-md { margin-top: var(--stack-md); }
.mt-lg { margin-top: var(--stack-lg); }
.mb-sm { margin-bottom: var(--stack-sm); }
.mb-md { margin-bottom: var(--stack-md); }
.gap-sm { gap: var(--stack-sm); }
.gap-md { gap: var(--stack-md); }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1; }