/* ==========================================================================
   Rachayitha (రచయిత) — Official Website Design System
   Modern, Sleek, Authentic Glassmorphic Aesthetic
   ========================================================================== */

:root {
  --bg-primary: #050814;
  --bg-secondary: #090e21;
  --bg-card: rgba(14, 21, 44, 0.7);
  --bg-card-hover: rgba(20, 31, 64, 0.85);
  --bg-glass: rgba(255, 255, 255, 0.03);
  --bg-glass-active: rgba(255, 255, 255, 0.07);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 229, 255, 0.25);
  --border-accent: rgba(99, 102, 241, 0.3);

  --accent-cyan: #00e5ff;
  --accent-indigo: #6366f1;
  --accent-purple: #a855f7;
  --accent-blue: #3b82f6;
  --accent-emerald: #10b981;
  --accent-amber: #f59e0b;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-subtle: #64748b;
  --text-white: #ffffff;

  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --font-telugu: 'Noto Sans Telugu', 'Plus Jakarta Sans', sans-serif;

  --glow-cyan: 0 0 50px -10px rgba(0, 229, 255, 0.35);
  --glow-indigo: 0 0 50px -10px rgba(99, 102, 241, 0.35);
  --glow-card: 0 20px 40px -15px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.06);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  color-scheme: dark;
  -webkit-text-size-adjust: 100%;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  max-width: 100vw;
  position: relative;
  -webkit-font-smoothing: antialiased;
  touch-action: manipulation;
}

body.mobile-nav-lock {
  overflow: hidden;
}

/* Background Cosmic Lights */
.bg-ambient {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.ambient-grid {
  position: absolute;
  inset: 0;
  background-image: 
    linear-gradient(to right, rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.8) 0%, transparent 75%);
}

.ambient-glow-1 {
  position: absolute;
  top: -15%;
  left: 20%;
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.18) 0%, transparent 70%);
  filter: blur(120px);
}

.ambient-glow-2 {
  position: absolute;
  top: 15%;
  right: 5%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.12) 0%, transparent 70%);
  filter: blur(130px);
}

.ambient-glow-3 {
  position: absolute;
  bottom: 10%;
  left: 30%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.1) 0%, transparent 70%);
  filter: blur(140px);
}

/* Containers */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* Typography Helpers */
.gradient-text {
  background: linear-gradient(135deg, #ffffff 10%, #a5b4fc 50%, #00e5ff 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.gradient-accent {
  background: linear-gradient(135deg, #00e5ff 0%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

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

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

/* Sticky Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  background: rgba(5, 8, 20, 0.86);
  border-bottom: 1px solid var(--border-subtle);
  padding-top: env(safe-area-inset-top, 0);
  transition: background 0.3s ease;
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text-white);
  min-width: 0;
}

.brand-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.12);
  flex-shrink: 0;
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-badge {
  font-size: 14px;
  font-weight: 500;
  color: var(--accent-cyan);
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

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

.nav-mobile-cta {
  display: none;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--text-white);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  font-size: 14px;
  text-decoration: none;
  border-radius: var(--radius-full);
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: #ffffff;
  color: #050814;
  padding: 10px 22px;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  background: #f1f5f9;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 255, 255, 0.35);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-main);
  border-color: var(--border-subtle);
  padding: 10px 20px;
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-cyan {
  background: linear-gradient(135deg, #00e5ff 0%, #3b82f6 100%);
  color: #050814;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 700;
  box-shadow: 0 0 35px -5px rgba(0, 229, 255, 0.5);
}

.btn-cyan:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 0 50px 0px rgba(0, 229, 255, 0.65);
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
}

.btn-icon:hover {
  color: var(--text-white);
  background: rgba(255, 255, 255, 0.1);
}

.btn-disabled {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  color: var(--text-subtle);
  padding: 14px 28px;
  cursor: not-allowed;
  opacity: 0.8;
}

/* Hero Section */
.hero-section {
  padding: 90px 0 60px;
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid rgba(0, 229, 255, 0.25);
  font-size: 13px;
  color: var(--accent-cyan);
  margin-bottom: 28px;
  font-weight: 500;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-emerald);
  box-shadow: 0 0 12px var(--accent-emerald);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); opacity: 0.8; }
  50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 16px var(--accent-emerald); }
  100% { transform: scale(0.95); opacity: 0.8; }
}

.hero-title {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  max-width: 900px;
  margin: 0 auto 24px;
}

.hero-description {
  font-size: clamp(16px, 2vw, 19px);
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.65;
}

.hero-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 50px;
}

.hero-sublinks {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  font-size: 13px;
  color: var(--text-subtle);
  margin-bottom: 60px;
}

.hero-sublink {
  color: var(--text-muted);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.2);
  text-underline-offset: 4px;
  transition: color 0.2s;
}

.hero-sublink:hover {
  color: var(--accent-cyan);
}

/* Hero Showcase Image Window */
.hero-visual {
  position: relative;
  max-width: 1060px;
  margin: 0 auto;
}

.window-frame {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--glow-card), 0 0 100px -20px rgba(0, 229, 255, 0.2);
  transition: border-color 0.3s ease;
}

.window-frame:hover {
  border-color: rgba(0, 229, 255, 0.3);
}

.window-header {
  height: 44px;
  background: rgba(9, 14, 33, 0.9);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  padding: 0 18px;
  gap: 12px;
}

.window-dots {
  display: flex;
  gap: 7px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.dot-red { background: #ef4444; }
.dot-yellow { background: #f59e0b; }
.dot-green { background: #10b981; }

.window-title {
  font-size: 12px;
  color: var(--text-subtle);
  font-family: var(--font-mono);
  margin: 0 auto;
  transform: translateX(-24px);
}

.window-content img {
  width: 100%;
  display: block;
  object-fit: cover;
}

/* App Compatibility Strip */
.compat-strip {
  padding: 40px 0 80px;
  text-align: center;
}

.compat-title {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--text-subtle);
  margin-bottom: 24px;
  font-family: var(--font-mono);
}

.compat-badges {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.compat-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  transition: all 0.2s ease;
}

.compat-chip:hover {
  background: rgba(255, 255, 255, 0.08);
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}

/* Section Header */
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 50px;
}

.section-tag {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--accent-cyan);
  font-family: var(--font-mono);
  font-weight: 600;
  margin-bottom: 12px;
  display: block;
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
}

/* Interactive Playground Section */
.playground-section {
  padding: 60px 0 100px;
}

.playground-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--glow-card);
}

.playground-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 280px;
}

@media (max-width: 768px) {
  .playground-grid {
    grid-template-columns: 1fr;
  }
}

.playground-input-side {
  padding: 28px;
  border-right: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
}

.playground-output-side {
  padding: 28px;
  background: rgba(5, 8, 20, 0.5);
  display: flex;
  flex-direction: column;
  position: relative;
}

.playground-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-emerald);
}

.interactive-input {
  width: 100%;
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 22px;
  font-family: var(--font-mono);
  color: var(--text-white);
  resize: none;
  min-height: 120px;
}

.interactive-output {
  flex: 1;
  font-size: 28px;
  font-family: var(--font-telugu);
  color: #00e5ff;
  line-height: 1.5;
  word-break: break-word;
  min-height: 120px;
}

.playground-footer {
  padding: 16px 28px;
  background: rgba(9, 14, 33, 0.9);
  border-top: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.preset-wrapper {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  min-width: 0;
}

.preset-label {
  font-size: 12px;
  color: var(--text-subtle);
  font-family: var(--font-mono);
  white-space: nowrap;
  flex-shrink: 0;
}

.preset-buttons {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.preset-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-mono);
  white-space: nowrap;
}

.preset-btn:hover, .preset-btn:active {
  background: rgba(0, 229, 255, 0.1);
  color: var(--accent-cyan);
  border-color: rgba(0, 229, 255, 0.3);
}

.playground-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.action-btn {
  background: transparent;
  border: 1px solid var(--border-subtle);
  color: var(--text-muted);
  padding: 7px 14px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s;
  white-space: nowrap;
}

.action-btn:hover, .action-btn:active {
  color: var(--text-white);
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.05);
}

.clear-btn:hover, .clear-btn:active {
  color: #f87171;
  border-color: rgba(239, 68, 68, 0.3);
  background: rgba(239, 68, 68, 0.08);
}

/* Features Grid */
.features-section {
  padding: 60px 0 100px;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: 0 15px 35px -10px rgba(0, 229, 255, 0.15);
}

.feature-icon-wrapper {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-cyan);
  font-size: 20px;
  margin-bottom: 20px;
}

.feature-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-white);
}

.feature-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 18px;
  flex: 1;
}

.feature-pill {
  align-self: flex-start;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-subtle);
  background: rgba(255, 255, 255, 0.04);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

/* Key Map Explorer */
.keymap-section {
  padding: 60px 0 100px;
}

.keymap-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 28px;
}

.tab-group {
  display: flex;
  gap: 6px;
  background: rgba(255, 255, 255, 0.03);
  padding: 4px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
}

.tab-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all 0.2s;
}

.tab-btn.active {
  background: var(--accent-cyan);
  color: #050814;
}

.search-box {
  position: relative;
  min-width: 260px;
}

.search-input {
  width: 100%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 10px 18px 10px 40px;
  color: var(--text-white);
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
}

.search-input:focus {
  border-color: var(--accent-cyan);
}

.search-icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-subtle);
  pointer-events: none;
}

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

.key-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px 12px;
  text-align: center;
  transition: all 0.2s ease;
  cursor: pointer;
}

.key-card:hover {
  background: rgba(0, 229, 255, 0.06);
  border-color: var(--accent-cyan);
  transform: translateY(-2px);
}

.key-english {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-subtle);
  margin-bottom: 4px;
}

.key-telugu {
  font-family: var(--font-telugu);
  font-size: 24px;
  font-weight: 700;
  color: var(--text-white);
}

/* Comparison Table */
.comparison-section {
  padding: 60px 0 100px;
}

.table-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow-x: auto;
  box-shadow: var(--glow-card);
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  min-width: 680px;
}

.comparison-table th, .comparison-table td {
  padding: 18px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.comparison-table th {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--text-subtle);
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.02);
}

.comparison-table td {
  font-size: 14px;
  color: var(--text-muted);
}

.comparison-table tr:hover td {
  background: rgba(255, 255, 255, 0.015);
}

.check-green {
  color: var(--accent-emerald);
  font-weight: 700;
}

.cross-gray {
  color: var(--text-subtle);
  opacity: 0.4;
}

/* Showcase Split Section */
.showcase-split-section {
  padding: 20px 0 80px;
}

.showcase-split-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  align-items: center;
}

/* Table Scroll Hint */
.table-scroll-hint {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent-cyan);
  margin-bottom: 14px;
  padding: 6px 16px;
  background: rgba(0, 229, 255, 0.06);
  border: 1px solid rgba(0, 229, 255, 0.2);
  border-radius: var(--radius-full);
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}

/* Downloads Section */
.download-section {
  padding: 60px 0 120px;
}

.download-hub {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  box-shadow: 0 0 120px -30px rgba(0, 229, 255, 0.25);
}

.download-main {
  padding: 48px;
}

.download-sidebar {
  padding: 48px;
  background: rgba(5, 8, 20, 0.6);
  border-left: 1px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.platform-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-family: var(--font-mono);
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  margin-bottom: 20px;
}

.download-title {
  font-size: 36px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.download-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 480px;
}

.download-actions-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 24px;
}

.download-meta-list {
  font-size: 13px;
  color: var(--text-subtle);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-heading {
  font-size: 11px;
  text-transform: uppercase;
  font-family: var(--font-mono);
  color: var(--text-subtle);
  display: block;
  margin-bottom: 16px;
  letter-spacing: 0.08em;
}

.os-card {
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 18px;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.os-info {
  display: flex;
  align-items: center;
  gap: 12px;
}

.os-icon-box {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.os-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-white);
}

.os-meta {
  font-size: 12px;
  color: var(--text-subtle);
}

.status-ready {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(16, 185, 129, 0.15);
  color: var(--accent-emerald);
  border: 1px solid rgba(16, 185, 129, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.status-soon {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(245, 158, 11, 0.15);
  color: var(--accent-amber);
  border: 1px solid rgba(245, 158, 11, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.status-preview {
  font-size: 11px;
  font-family: var(--font-mono);
  background: rgba(0, 229, 255, 0.12);
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 229, 255, 0.3);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.macos-build-note {
  padding-top: 20px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-subtle);
  line-height: 1.6;
}

.accent-link {
  color: var(--accent-cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color 0.2s;
}

.accent-link:hover {
  color: #ffffff;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  padding: 60px 0 40px;
  background: rgba(3, 5, 13, 0.9);
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-link {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--text-white);
}

.footer-disclaimer {
  padding-top: 24px;
  font-size: 12px;
  color: var(--text-subtle);
  line-height: 1.6;
}

/* ==========================================================================
   RESPONSIVE DESIGN SYSTEM
   Flawless layout across Smartphones (Portrait/Landscape) & Tablets
   ========================================================================== */

/* Animated Mobile Hamburger Button */
.mobile-toggle {
  display: none;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 42px;
  cursor: pointer;
  position: relative;
  align-items: center;
  justify-content: center;
  padding: 0;
  transition: all 0.2s ease;
  -webkit-tap-highlight-color: transparent;
}

.mobile-toggle:hover, .mobile-toggle:focus {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.mobile-toggle:active {
  transform: scale(0.95);
}

.hamburger-box {
  width: 18px;
  height: 14px;
  position: relative;
  display: block;
}

.hamburger-bar {
  position: absolute;
  width: 100%;
  height: 2px;
  background-color: var(--text-white);
  border-radius: 2px;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease, top 0.25s ease;
  left: 0;
}

.hamburger-bar:nth-child(1) { top: 0; }
.hamburger-bar:nth-child(2) { top: 6px; }
.hamburger-bar:nth-child(3) { top: 12px; }

/* Hamburger transformed into '✕' when menu open */
.site-header.nav-open .hamburger-bar:nth-child(1) {
  top: 6px;
  transform: rotate(45deg);
}

.site-header.nav-open .hamburger-bar:nth-child(2) {
  opacity: 0;
  transform: translateX(-8px);
}

.site-header.nav-open .hamburger-bar:nth-child(3) {
  top: 6px;
  transform: rotate(-45deg);
}

/* Nav Backdrop Overlay */
.nav-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 90;
}

.site-header.nav-open ~ .nav-backdrop,
.site-header.nav-open .nav-backdrop {
  opacity: 1;
  pointer-events: auto;
}

/* --- TABLETS & SMALL DESKTOPS (<= 1024px) --- */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .showcase-split-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .keymap-grid {
    grid-template-columns: repeat(auto-fill, minmax(115px, 1fr));
  }
}

/* --- TABLET PORTRAIT & MOBILE (<= 868px) --- */
@media (max-width: 868px) {
  .mobile-toggle {
    display: flex;
  }

  /* Slide-Down Glassmorphic Drawer */
  .nav-links {
    position: fixed;
    top: 74px;
    left: 0;
    right: 0;
    background: rgba(5, 8, 20, 0.96);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 24px 28px;
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.32s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.25s ease;
    z-index: 99;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.85);
    max-height: calc(100dvh - 74px);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }

  .site-header.nav-open .nav-links {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-links li {
    width: 100%;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .nav-link {
    display: flex;
    align-items: center;
    padding: 15px 4px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    transition: color 0.2s, padding-left 0.2s;
  }

  .nav-link:hover, .nav-link:active {
    color: var(--accent-cyan);
    padding-left: 6px;
  }

  .nav-mobile-cta {
    display: block;
    padding-top: 20px;
    border-bottom: none !important;
  }

  .btn-full {
    width: 100%;
  }

  /* Playground Stacked on Tablets/Phones */
  .playground-grid {
    grid-template-columns: 1fr;
  }

  .playground-input-side {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding: 22px 20px;
  }

  .playground-output-side {
    padding: 22px 20px;
  }

  /* Comparison Table Mobile Swipe */
  .table-scroll-hint {
    display: inline-flex;
  }

  .table-wrapper {
    border-radius: var(--radius-lg);
    -webkit-overflow-scrolling: touch;
  }

  /* Sticky first column so user knows which feature they're checking while swiping */
  .comparison-table th:first-child,
  .comparison-table td:first-child {
    position: sticky;
    left: 0;
    background: #080d22;
    z-index: 2;
    border-right: 1px solid var(--border-subtle);
    box-shadow: 4px 0 12px rgba(0, 0, 0, 0.35);
    min-width: 170px;
  }

  .comparison-table th:first-child {
    background: #0d1536;
    z-index: 3;
  }

  /* Download Hub Stack */
  .download-hub {
    grid-template-columns: 1fr;
  }

  .download-sidebar {
    border-left: none;
    border-top: 1px solid var(--border-subtle);
    padding: 36px 32px;
  }

  .download-main {
    padding: 36px 32px;
  }
}

/* --- SMARTPHONES & SMALL PHABLETS (<= 640px) --- */
@media (max-width: 640px) {
  .hero-section {
    padding: 48px 0 32px;
  }

  .hero-pill {
    font-size: 11.5px;
    padding: 5px 12px;
    margin-bottom: 20px;
    max-width: 100%;
    text-align: center;
  }

  .hero-title {
    font-size: clamp(30px, 8.5vw, 44px);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
  }

  .hero-description {
    font-size: 15px;
    margin-bottom: 28px;
    line-height: 1.6;
  }

  .hero-cta {
    flex-direction: column;
    width: 100%;
    gap: 12px;
    margin-bottom: 30px;
  }

  .hero-cta .btn {
    width: 100%;
    max-width: 330px;
    padding: 14px 20px;
    font-size: 15px;
  }

  .hero-sublinks {
    flex-wrap: wrap;
    gap: 8px 12px;
    font-size: 12px;
    margin-bottom: 36px;
  }

  .sublink-dot {
    display: none;
  }

  .sublink-tag {
    width: 100%;
    display: block;
    color: var(--accent-cyan);
    font-weight: 600;
  }

  /* App Compatibility */
  .compat-strip {
    padding: 30px 0 50px;
  }

  .compat-badges {
    gap: 8px;
  }

  .compat-chip {
    padding: 6px 12px;
    font-size: 12px;
  }

  /* Section Headers */
  .section-header {
    margin-bottom: 36px;
  }

  .section-title {
    font-size: clamp(24px, 6vw, 34px);
  }

  .section-desc {
    font-size: 14px;
  }

  /* Playground Section */
  .playground-section {
    padding: 40px 0 70px;
  }

  .playground-input-side,
  .playground-output-side {
    padding: 18px 16px;
  }

  .interactive-input {
    font-size: 18px;
    min-height: 85px;
  }

  .interactive-output {
    font-size: 22px;
    min-height: 85px;
  }

  .playground-footer {
    padding: 14px 16px;
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .preset-wrapper {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .preset-buttons {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    width: 100%;
    padding-bottom: 4px;
  }

  .preset-buttons::-webkit-scrollbar {
    display: none;
  }

  .preset-btn {
    flex-shrink: 0;
  }

  .playground-actions {
    display: flex;
    gap: 10px;
    width: 100%;
  }

  .playground-actions .action-btn {
    flex: 1;
    justify-content: center;
    padding: 9px 12px;
  }

  /* Features Grid Single Column */
  .features-section {
    padding: 40px 0 70px;
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .feature-card {
    padding: 24px 20px;
  }

  /* Key Map Controls & Matrix */
  .keymap-section {
    padding: 40px 0 70px;
  }

  .keymap-controls {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }

  .tab-group {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    white-space: nowrap;
    width: 100%;
    padding: 4px;
  }

  .tab-group::-webkit-scrollbar {
    display: none;
  }

  .tab-btn {
    flex-shrink: 0;
    padding: 8px 14px;
    font-size: 12px;
  }

  .search-box {
    width: 100%;
    min-width: 0;
  }

  .keymap-grid {
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: 8px;
  }

  .key-card {
    padding: 10px 8px;
    border-radius: 10px;
  }

  .key-card:active {
    background: rgba(0, 229, 255, 0.12);
    border-color: var(--accent-cyan);
    transform: scale(0.97);
  }

  .key-english {
    font-size: 11px;
  }

  .key-telugu {
    font-size: 20px;
  }

  /* Comparison Section */
  .comparison-section {
    padding: 40px 0 70px;
  }

  .comparison-table th, .comparison-table td {
    padding: 12px 14px;
    font-size: 13px;
  }

  /* Download Hub */
  .download-section {
    padding: 40px 0 80px;
  }

  .download-main {
    padding: 28px 20px;
  }

  .download-sidebar {
    padding: 24px 20px;
  }

  .download-title {
    font-size: 26px;
  }

  .download-desc {
    font-size: 14px;
    margin-bottom: 24px;
  }

  .download-actions-grid {
    flex-direction: column;
    gap: 12px;
  }

  .download-actions-grid .btn {
    width: 100%;
    padding: 14px;
  }

  .os-card {
    padding: 14px;
  }

  /* Footer */
  .site-footer {
    padding: 40px 0 30px;
  }

  .footer-grid {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
  }

  .footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px 16px;
    width: 100%;
  }

  .footer-link {
    font-size: 14px;
    padding: 4px 0;
  }
}

/* --- EXTRA-COMPACT PHONES (<= 480px, e.g. iPhone SE, Fold Outer Screen) --- */
@media (max-width: 480px) {
  .nav-download-btn {
    display: none;
  }

  .brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-badge {
    font-size: 12px;
    padding: 2px 6px;
  }

  .keymap-grid {
    grid-template-columns: repeat(auto-fill, minmax(82px, 1fr));
    gap: 6px;
  }

  .window-header {
    height: 36px;
    padding: 0 10px;
  }

  .window-title {
    font-size: 10.5px;
    transform: none;
    margin-left: auto;
    margin-right: 0;
  }

  .window-frame {
    border-radius: var(--radius-lg);
  }

  .download-hub {
    border-radius: var(--radius-lg);
  }
}