/* ==========================================================================
   DISHA — Official Website & Brand Design System
   Modern Geospatial AI Theme (Dark default with Light & High-Contrast support)
   ========================================================================== */

:root {
  /* Color Palette - Geospatial AI Tokens */
  --bg-primary: #080E1A;
  --bg-secondary: #0D1627;
  --bg-panel: #121F36;
  --bg-panel-hover: #182946;
  --bg-panel-glass: rgba(18, 31, 54, 0.75);
  
  --border-subtle: #1C2E4C;
  --border-strong: #2A436D;
  --border-glow: rgba(56, 189, 248, 0.35);
  
  --text-primary: #F1F5F9;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #080E1A;
  
  /* Brand Accents */
  --accent-cyan: #38BDF8;
  --accent-cyan-glow: rgba(56, 189, 248, 0.25);
  --accent-emerald: #10B981;
  --accent-emerald-glow: rgba(16, 185, 129, 0.25);
  --accent-violet: #818CF8;
  --accent-amber: #F59E0B;
  --accent-rose: #F43F5E;
  
  /* Typography & Layout */
  --font-display: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'IBM Plex Mono', SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
  
  --container-max: 1200px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 24px rgba(56, 189, 248, 0.2);
  
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #EDF2F7;
  --bg-panel: #FFFFFF;
  --bg-panel-hover: #F1F5F9;
  --bg-panel-glass: rgba(255, 255, 255, 0.85);
  
  --border-subtle: #E2E8F0;
  --border-strong: #CBD5E1;
  --border-glow: rgba(2, 132, 199, 0.3);
  
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --text-inverse: #FFFFFF;
  
  --accent-cyan: #0284C7;
  --accent-cyan-glow: rgba(2, 132, 199, 0.15);
  --accent-emerald: #059669;
  --accent-emerald-glow: rgba(5, 150, 105, 0.15);
  --accent-violet: #6366F1;
  
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 8px 24px -4px rgba(15, 23, 42, 0.1);
  --shadow-lg: 0 20px 40px -10px rgba(15, 23, 42, 0.15);
  --shadow-glow: 0 0 20px rgba(2, 132, 199, 0.12);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition-normal), color var(--transition-normal);
}

main {
  flex: 1;
}

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

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

button, input, select, textarea {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
  outline: none;
}

::selection {
  background: var(--accent-cyan);
  color: var(--bg-primary);
}

/* Typography Helpers */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.mono {
  font-family: var(--font-mono);
}

.wrap {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
  font-weight: 600;
}

.eyebrow::before {
  content: '';
  width: 14px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

.badge-cyan {
  background: rgba(56, 189, 248, 0.1);
  border-color: rgba(56, 189, 248, 0.3);
  color: var(--accent-cyan);
}

.badge-emerald {
  background: rgba(16, 185, 129, 0.1);
  border-color: rgba(16, 185, 129, 0.3);
  color: var(--accent-emerald);
}

.badge-violet {
  background: rgba(129, 140, 248, 0.1);
  border-color: rgba(129, 140, 248, 0.3);
  color: var(--accent-violet);
}

.badge-amber {
  background: rgba(245, 158, 11, 0.1);
  border-color: rgba(245, 158, 11, 0.3);
  color: var(--accent-amber);
}

/* ==========================================================================
   Navigation Bar
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg-panel-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
  transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-primary);
}

.brand-logo-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: var(--bg-panel);
}

.nav-link.active {
  color: var(--accent-cyan);
  font-weight: 600;
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  min-width: 240px;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition-normal);
  z-index: 101;
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-item {
  display: flex;
  flex-direction: column;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  transition: background var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--bg-panel-hover);
}

.dropdown-title {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.dropdown-desc {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* Header Utilities */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.theme-toggle-btn {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-panel);
  cursor: pointer;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.theme-toggle-btn:hover {
  color: var(--text-primary);
  border-color: var(--border-strong);
}

.github-star-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.github-star-link:hover {
  border-color: var(--accent-cyan);
  color: var(--text-primary);
}

.github-star-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 4px;
  background: var(--bg-secondary);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* Mobile Nav Toggle */
.mobile-nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  background: var(--bg-panel);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  color: var(--text-primary);
}

/* ==========================================================================
   Buttons & Action Styles
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent-cyan);
  color: #080E1A;
  box-shadow: 0 0 16px var(--accent-cyan-glow);
}

.btn-primary:hover {
  background: #7dd3fc;
  box-shadow: 0 0 24px rgba(56, 189, 248, 0.45);
  transform: translateY(-1px);
}

.btn-emerald {
  background: var(--accent-emerald);
  color: #080E1A;
  box-shadow: 0 0 16px var(--accent-emerald-glow);
}

.btn-emerald:hover {
  background: #34d399;
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-panel);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}

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

.btn-ghost {
  color: var(--text-secondary);
}

.btn-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-panel);
}

.btn-lg {
  padding: 14px 26px;
  font-size: 1rem;
  border-radius: var(--radius-md);
}

.btn-sm {
  padding: 6px 12px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  padding: 80px 0 70px;
  border-bottom: 1px solid var(--border-subtle);
  background-image: 
    linear-gradient(rgba(56, 189, 248, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(56, 189, 248, 0.04) 1px, transparent 1px);
  background-size: 40px 40px;
  background-position: center top;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 500px;
  background: radial-gradient(ellipse at center, rgba(56, 189, 248, 0.15), rgba(129, 140, 248, 0.05) 50%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-title {
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.08;
  margin-bottom: 20px;
}

.hero-gradient-text {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-violet) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero-specs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.hero-specs span {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Interactive Prompt Simulator in Hero */
.prompt-simulator {
  margin: 50px auto 0;
  max-width: 740px;
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  text-align: left;
}

.simulator-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 18px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
}

.window-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.window-dot {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--border-strong);
}

.window-dot.red { background: #EF4444; }
.window-dot.yellow { background: #F59E0B; }
.window-dot.green { background: #10B981; }

.simulator-title {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.simulator-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.sim-message-user {
  align-self: flex-end;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md) var(--radius-md) 2px var(--radius-md);
  padding: 12px 18px;
  font-size: 0.95rem;
  max-width: 82%;
  color: var(--text-primary);
}

.sim-message-agent {
  align-self: flex-start;
  max-width: 90%;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.agent-bubble {
  background: rgba(56, 189, 248, 0.06);
  border: 1px solid rgba(56, 189, 248, 0.2);
  border-radius: var(--radius-md) var(--radius-md) var(--radius-md) 2px;
  padding: 14px 18px;
  font-size: 0.92rem;
  line-height: 1.6;
}

.tool-execution-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.1);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: var(--radius-sm);
  padding: 5px 12px;
  width: fit-content;
}

.sim-presets-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  overflow-x: auto;
}

.sim-preset-btn {
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
  font-family: var(--font-mono);
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-fast);
}

.sim-preset-btn:hover, .sim-preset-btn.active {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
}

/* ==========================================================================
   Sections & Layout
   ========================================================================== */
section {
  padding: 88px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.section-header {
  max-width: 680px;
  margin-bottom: 52px;
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  margin-bottom: 14px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ==========================================================================
   Architecture & Comparison Grid
   ========================================================================== */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.feature-table-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.feature-table-header {
  padding: 16px 20px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
}

.feature-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border-subtle);
  font-size: 0.9rem;
}

.feature-row:last-child {
  border-bottom: none;
}

.feature-row-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.feature-row-val {
  font-weight: 600;
  color: var(--text-primary);
  text-align: right;
}

/* ==========================================================================
   14 Feature Categories Index
   ========================================================================== */
.feature-catalog-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.filter-chip {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-chip:hover, .filter-chip.active {
  background: var(--accent-cyan);
  color: #080E1A;
  border-color: var(--accent-cyan);
  font-weight: 600;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 20px;
}

.feature-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  transition: all var(--transition-fast);
  position: relative;
}

.feature-card:hover {
  border-color: var(--border-strong);
  background: var(--bg-panel-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  font-weight: 600;
}

.feature-card-icon {
  font-size: 1.25rem;
}

.feature-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  flex: 1;
}

.feature-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.feature-tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

/* ==========================================================================
   Visual Changelog Components
   ========================================================================== */
.changelog-filter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 40px;
  padding: 16px 20px;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  flex-wrap: wrap;
}

.changelog-search-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  min-width: 280px;
  flex: 1;
}

.changelog-search-input {
  width: 100%;
  font-size: 0.88rem;
  color: var(--text-primary);
}

.changelog-search-input::placeholder {
  color: var(--text-muted);
}

.release-container {
  margin-bottom: 60px;
}

.release-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--border-strong);
  flex-wrap: wrap;
  gap: 16px;
}

.release-title-group {
  display: flex;
  align-items: baseline;
  gap: 16px;
  flex-wrap: wrap;
}

.release-version {
  font-size: 1.8rem;
  font-weight: 800;
  font-family: var(--font-display);
}

.release-date {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
}

.release-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 24px;
}

.release-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-fast);
}

.release-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.release-card-visual {
  height: 180px;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.release-card-visual-content {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-align: center;
  padding: 16px;
}

.release-card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.release-card-body h4 {
  font-size: 1.1rem;
}

.release-card-body p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.55;
  flex: 1;
}

.release-card-footer {
  padding: 12px 20px;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8rem;
}

/* ==========================================================================
   Brand Guidelines & Interactive Logo Studio
   ========================================================================== */
.brand-studio-wrapper {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-lg);
  margin-bottom: 48px;
}

.studio-selector-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.studio-candidate-btn {
  background: var(--bg-secondary);
  border: 2px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 18px;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.studio-candidate-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-panel-hover);
}

.studio-candidate-btn.active {
  border-color: var(--accent-cyan);
  background: rgba(56, 189, 248, 0.08);
  box-shadow: 0 0 16px var(--accent-cyan-glow);
}

.candidate-preview-mini {
  width: 48px;
  height: 48px;
  margin-bottom: 4px;
}

.candidate-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.candidate-tagline {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
}

.brand-canvas-view {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
}

.brand-preview-stage {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px;
  position: relative;
  transition: background var(--transition-normal);
}

.brand-stage-dark {
  background: #080E1A;
}

.brand-stage-light {
  background: #FFFFFF;
}

.brand-stage-mesh {
  background: radial-gradient(circle at 50% 50%, #152544 0%, #080E1A 100%);
}

.brand-stage-controls {
  position: absolute;
  bottom: 14px;
  left: 14px;
  display: flex;
  gap: 8px;
}

.stage-btn {
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.72rem;
  font-family: var(--font-mono);
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(8px);
  color: #FFF;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.stage-btn:hover, .stage-btn.active {
  background: var(--accent-cyan);
  color: #000;
  border-color: var(--accent-cyan);
}

.brand-details-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.brand-palette-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 12px;
}

.color-swatch-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  overflow: hidden;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.color-swatch-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
}

.color-swatch-box {
  height: 60px;
  width: 100%;
}

.color-swatch-info {
  padding: 10px;
}

.color-swatch-name {
  font-size: 0.8rem;
  font-weight: 600;
}

.color-swatch-hex {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Documentation Hub Layout
   ========================================================================== */
.docs-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 48px;
  align-items: start;
}

.docs-sidebar {
  position: sticky;
  top: 90px;
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  max-height: calc(100vh - 120px);
  overflow-y: auto;
}

.docs-search {
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
}

.docs-search input {
  width: 100%;
  font-size: 0.85rem;
}

.docs-nav-group {
  margin-bottom: 20px;
}

.docs-nav-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 600;
}

.docs-nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.docs-nav-link {
  display: block;
  padding: 6px 10px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.docs-nav-link:hover, .docs-nav-link.active {
  color: var(--accent-cyan);
  background: var(--bg-secondary);
  font-weight: 500;
}

.docs-content {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.doc-section {
  scroll-margin-top: 100px;
}

.doc-section h2 {
  font-size: 1.8rem;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border-subtle);
}

.doc-section h3 {
  font-size: 1.3rem;
  margin: 24px 0 12px;
}

.doc-section p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.7;
}

.code-snippet-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin: 18px 0;
}

.code-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 16px;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.code-pre {
  padding: 16px;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--text-primary);
}

/* ==========================================================================
   Download Hub
   ========================================================================== */
.download-band {
  background: linear-gradient(180deg, var(--bg-panel) 0%, var(--bg-secondary) 100%);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  box-shadow: var(--shadow-lg);
}

.download-cards-row {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin: 36px 0 24px;
}

.download-os-card {
  background: var(--bg-panel);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  min-width: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  transition: all var(--transition-fast);
}

.download-os-card:hover {
  border-color: var(--accent-cyan);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), 0 0 20px var(--accent-cyan-glow);
}

.os-icon {
  font-size: 2.4rem;
  margin-bottom: 4px;
}

.os-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
}

.os-detail {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 40px;
  margin-top: 60px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 320px;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-links a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 16px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toast {
  background: var(--bg-panel);
  border: 1px solid var(--border-strong);
  color: var(--text-primary);
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slide-in 0.25s ease-out;
}

@keyframes slide-in {
  from { transform: translateY(20px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

/* Responsive Breakpoints */
@media (max-width: 960px) {
  .compare-grid, .brand-canvas-view, .docs-layout {
    grid-template-columns: 1fr;
  }
  .docs-sidebar {
    position: static;
    max-height: none;
  }
  .studio-selector-bar {
    grid-template-columns: 1fr 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  .mobile-nav-toggle {
    display: flex;
  }
  .studio-selector-bar {
    grid-template-columns: 1fr;
  }
  .footer-top {
    grid-template-columns: 1fr;
  }
  .download-band {
    padding: 40px 24px;
  }
}