/* ========================================
   PersonaUI Page — Glassmorphic Design System
   Reflecting PersonaUI's frontend style
   ======================================== */

/* ── Design Tokens ── */
:root {
  /* Border Radius (from PersonaUI) */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-full: 50%;
  --radius-pill: 100px;

  /* Transitions (from PersonaUI) */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.2s ease;
  --transition-slow: 0.3s ease;

  /* Font Weights */
  --fw-normal: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;

  /* Typography (from PersonaUI) */
  --font-main: 'Ubuntu', 'Roboto', 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  /* Special Colors (from PersonaUI) */
  --nonverbal-color: #e4ba00;
  --color-danger: #ef4444;
  --color-success: #22c55e;
  --color-warning: #f59e0b;

  /* Layout */
  --max-width: 1200px;
  --nav-height: 72px;
}

/* ── Light Theme (Default — PersonaUI default) ── */
:root[data-theme="light"] {
  /* Blob Background Colors */
  --bg-base: #f8f9fa;
  --blob-color-1: #d7dce4;
  --blob-color-2: #66cfff;
  --blob-color-3: #fd91ee;
  --blob-color-4: #c9b8ff;
  --blob-color-5: #b8d0ff;
  --blob-color-6: #f0c6ff;

  /* Glassmorphic Surfaces */
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-bg-strong: rgba(255, 255, 255, 0.82);
  --glass-border: rgba(0, 0, 0, 0.1);
  --glass-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
  --glass-shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.1), 0 2px 12px rgba(0, 0, 0, 0.06);
  --glass-blur: blur(25px);

  /* Text */
  --text-primary: #1a1a2e;
  --text-secondary: #3a3a4a;
  --text-muted: #6a6a7a;
  --text-heading: #111122;

  /* Accent (from PersonaUI light theme) */
  --accent: #4f78e6;
  --accent-light: rgba(79, 120, 230, 0.12);
  --accent-glow: rgba(79, 120, 230, 0.15);
  --accent-hover: #3d64d4;

  /* Gold Accent (PersonaUI's signature) */
  --gold: #e4ba00;
  --gold-light: rgba(228, 186, 0, 0.12);
  --gold-glow: rgba(228, 186, 0, 0.15);

  /* Purple Accent (PersonaUI persona branding) */
  --purple: #667eea;
  --purple-dark: #764ba2;
  --purple-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  /* Inputs */
  --input-bg: rgba(255, 255, 255, 0.55);
  --input-border: rgba(0, 0, 0, 0.2);
  --input-focus-border: rgba(79, 120, 230, 0.6);
  --input-focus-shadow: 0 0 0 3px rgba(79, 120, 230, 0.15);

  /* Cards */
  --card-hover-bg: rgba(255, 255, 255, 0.75);

  /* Scrollbar */
  --scrollbar-track: rgba(0, 0, 0, 0.08);
  --scrollbar-thumb: rgba(0, 0, 0, 0.25);
  --scrollbar-thumb-hover: rgba(0, 0, 0, 0.4);

  /* Code Block */
  --code-bg: rgba(79, 120, 230, 0.08);
  --code-color: #4f78e6;
  --code-block-bg: #1e1e2e;
  --code-block-text: #a0b4d4;

  /* Tags */
  --tag-refactor: rgba(59, 130, 246, 0.12);
  --tag-refactor-text: #2563eb;
  --tag-improvement: rgba(16, 185, 129, 0.12);
  --tag-improvement-text: #059669;
  --tag-fix: rgba(245, 158, 11, 0.12);
  --tag-fix-text: #d97706;
  --tag-redesign: rgba(139, 92, 246, 0.12);
  --tag-redesign-text: #7c3aed;
  --tag-initial: rgba(236, 72, 153, 0.12);
  --tag-initial-text: #db2777;

  /* Noise overlay */
  --noise-opacity: 0.025;
  --noise-blend: overlay;
}

/* ── Dark Theme ── */
:root[data-theme="dark"] {
  /* Blob Background Colors */
  --bg-base: #0f1219;
  --blob-color-1: #1a2332;
  --blob-color-2: #2a3f5f;
  --blob-color-3: #3d4f66;
  --blob-color-4: #1e1640;
  --blob-color-5: #1a1a35;
  --blob-color-6: #251530;

  /* Glassmorphic Surfaces */
  --glass-bg: rgba(17, 17, 22, 0.8);
  --glass-bg-strong: rgba(20, 20, 28, 0.88);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 4px 15px rgba(0, 0, 0, 0.25);
  --glass-shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.4), 0 2px 12px rgba(0, 0, 0, 0.25);
  --glass-blur: blur(25px);

  /* Text */
  --text-primary: rgba(255, 255, 255, 0.88);
  --text-secondary: rgba(255, 255, 255, 0.65);
  --text-muted: rgba(255, 255, 255, 0.4);
  --text-heading: #ffffff;

  /* Accent (from PersonaUI dark theme) */
  --accent: #4facfe;
  --accent-light: rgba(79, 172, 254, 0.12);
  --accent-glow: rgba(79, 172, 254, 0.15);
  --accent-hover: #3d9aee;

  /* Gold */
  --gold: #e4ba00;
  --gold-light: rgba(228, 186, 0, 0.1);
  --gold-glow: rgba(228, 186, 0, 0.12);

  /* Purple */
  --purple: #667eea;
  --purple-dark: #764ba2;
  --purple-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);

  /* Inputs */
  --input-bg: rgba(0, 0, 0, 0.25);
  --input-border: rgba(255, 255, 255, 0.1);
  --input-focus-border: rgba(79, 172, 254, 0.5);
  --input-focus-shadow: 0 0 0 3px rgba(79, 172, 254, 0.12);

  /* Cards */
  --card-hover-bg: rgba(30, 30, 40, 0.85);

  /* Scrollbar */
  --scrollbar-track: rgba(255, 255, 255, 0.04);
  --scrollbar-thumb: rgba(255, 255, 255, 0.15);
  --scrollbar-thumb-hover: rgba(255, 255, 255, 0.25);

  /* Code Block */
  --code-bg: rgba(79, 172, 254, 0.1);
  --code-color: #4facfe;
  --code-block-bg: #0d0d14;
  --code-block-text: #8ab4d6;

  /* Tags */
  --tag-refactor: rgba(59, 130, 246, 0.15);
  --tag-refactor-text: #60a5fa;
  --tag-improvement: rgba(16, 185, 129, 0.15);
  --tag-improvement-text: #34d399;
  --tag-fix: rgba(245, 158, 11, 0.15);
  --tag-fix-text: #fbbf24;
  --tag-redesign: rgba(139, 92, 246, 0.15);
  --tag-redesign-text: #a78bfa;
  --tag-initial: rgba(236, 72, 153, 0.15);
  --tag-initial-text: #f472b6;

  /* Noise overlay */
  --noise-opacity: 0.03;
  --noise-blend: soft-light;
}


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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  height: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--accent-hover);
}

img {
  max-width: 100%;
  height: auto;
}

code {
  font-family: var(--font-mono);
  background: var(--code-bg);
  padding: 0.15em 0.4em;
  border-radius: var(--radius-xs);
  font-size: 0.875em;
  color: var(--code-color);
}

::selection {
  background: var(--accent-light);
  color: var(--text-primary);
}

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--scrollbar-track); border-radius: 3px; }
::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-thumb-hover); }


/* ==================== Animated Blob Background ==================== */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  background: var(--bg-base);
}

.bg-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.7;
  will-change: transform, border-radius;
}

/* Deep blobs — very large + heavy blur */
.bg-blob--1 {
  width: 55vw;
  height: 55vw;
  max-width: 800px;
  max-height: 800px;
  top: -15%;
  left: -10%;
  background: var(--blob-color-1);
  filter: blur(120px);
  animation: driftA 35s ease-in-out infinite alternate;
}

.bg-blob--2 {
  width: 50vw;
  height: 50vw;
  max-width: 700px;
  max-height: 700px;
  bottom: -10%;
  right: -15%;
  background: var(--blob-color-2);
  filter: blur(130px);
  animation: driftB 40s ease-in-out infinite alternate;
}

/* Mid blobs — medium size + blur */
.bg-blob--3 {
  width: 40vw;
  height: 40vw;
  max-width: 600px;
  max-height: 600px;
  top: 30%;
  right: 10%;
  background: var(--blob-color-3);
  filter: blur(100px);
  animation: driftC 45s ease-in-out infinite alternate;
}

.bg-blob--4 {
  width: 35vw;
  height: 35vw;
  max-width: 500px;
  max-height: 500px;
  top: 50%;
  left: 5%;
  background: var(--blob-color-4);
  filter: blur(90px);
  animation: driftD 38s ease-in-out infinite alternate;
}

.bg-blob--5 {
  width: 30vw;
  height: 30vw;
  max-width: 450px;
  max-height: 450px;
  top: 10%;
  left: 40%;
  background: var(--blob-color-5);
  filter: blur(80px);
  animation: driftE 42s ease-in-out infinite alternate;
}

/* Accent blob — smaller, less blur */
.bg-blob--6 {
  width: 25vw;
  height: 25vw;
  max-width: 350px;
  max-height: 350px;
  bottom: 25%;
  left: 30%;
  background: var(--blob-color-6);
  filter: blur(60px);
  opacity: 0.5;
  animation: driftF 50s ease-in-out infinite alternate;
}

/* Noise grain overlay */
.bg-noise {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: var(--noise-opacity);
  mix-blend-mode: var(--noise-blend);
  pointer-events: none;
}

/* Blob drift keyframes — organic movement */
@keyframes driftA {
  0% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: translate(0, 0) scale(1); }
  33% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; transform: translate(30px, -40px) scale(1.05); }
  66% { border-radius: 40% 60% 50% 60% / 35% 45% 55% 65%; transform: translate(-20px, 30px) scale(0.95); }
  100% { border-radius: 50% 30% 60% 40% / 60% 50% 30% 50%; transform: translate(10px, -10px) scale(1); }
}

@keyframes driftB {
  0% { border-radius: 50% 30% 60% 40% / 60% 50% 30% 50%; transform: translate(0, 0) scale(1); }
  50% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: translate(-40px, 30px) scale(1.08); }
  100% { border-radius: 40% 60% 50% 60% / 35% 45% 55% 65%; transform: translate(20px, -20px) scale(0.97); }
}

@keyframes driftC {
  0% { border-radius: 40% 60% 50% 60% / 35% 45% 55% 65%; transform: translate(0, 0) rotate(0deg); }
  50% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: translate(-30px, -20px) rotate(10deg); }
  100% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; transform: translate(20px, 15px) rotate(-5deg); }
}

@keyframes driftD {
  0% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; transform: translate(0, 0); }
  50% { border-radius: 50% 30% 60% 40% / 60% 50% 30% 50%; transform: translate(25px, -35px); }
  100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: translate(-15px, 20px); }
}

@keyframes driftE {
  0% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: translate(0, 0) scale(1); }
  50% { border-radius: 40% 60% 50% 60% / 35% 45% 55% 65%; transform: translate(35px, 20px) scale(1.06); }
  100% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; transform: translate(-10px, -25px) scale(0.95); }
}

@keyframes driftF {
  0% { border-radius: 50% 30% 60% 40% / 60% 50% 30% 50%; transform: translate(0, 0); }
  33% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; transform: translate(-20px, 30px); }
  66% { border-radius: 40% 60% 50% 60% / 35% 45% 55% 65%; transform: translate(15px, -15px); }
  100% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; transform: translate(-10px, 10px); }
}


/* ==================== Navigation ==================== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 2rem;
  transition: background var(--transition-slow), box-shadow var(--transition-slow), backdrop-filter var(--transition-slow);
}

.nav.scrolled {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  box-shadow: var(--glass-shadow);
  border-bottom: 1px solid var(--glass-border);
}

.nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: var(--fw-bold);
  color: var(--text-heading);
  letter-spacing: 1px;
  transition: color var(--transition-normal);
}

.nav__logo:hover {
  color: var(--text-heading);
}

.nav__logo-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  object-fit: contain;
  box-shadow: 0 2px 10px rgba(102, 126, 234, 0.3);
}

.nav__links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav__links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: var(--fw-medium);
  transition: color var(--transition-normal);
}

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

.nav__right {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Theme Toggle */
.theme-toggle {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--gold);
  transition: all var(--transition-normal);
}

.theme-toggle:hover {
  background: var(--gold-light);
  border-color: var(--gold);
  transform: scale(1.05);
  filter: drop-shadow(0 0 8px var(--gold-glow));
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
  transition: opacity var(--transition-normal), transform var(--transition-slow);
}

/* Show sun in dark mode, moon in light mode */
:root[data-theme="light"] .theme-toggle__sun { display: none; }
:root[data-theme="light"] .theme-toggle__moon { display: block; }
:root[data-theme="dark"] .theme-toggle__sun { display: block; }
:root[data-theme="dark"] .theme-toggle__moon { display: none; }

/* Nav CTA */
.nav__cta {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #fff !important;
  font-weight: var(--fw-semibold);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
  box-shadow: 0 2px 10px var(--accent-glow);
}

.nav__cta:hover {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px var(--accent-glow);
  color: #fff !important;
}

.nav__cta svg {
  width: 16px;
  height: 16px;
}

/* Mobile menu toggle */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  cursor: pointer;
  padding: 0.5rem;
}

.nav__toggle svg {
  width: 24px;
  height: 24px;
}


/* ==================== Hero Section ==================== */
.hero {
  min-height: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 2rem 4rem;
  position: relative;
}

.hero__content {
  max-width: 800px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border-radius: var(--radius-pill);
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border: 1px solid var(--glass-border);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  margin-bottom: 2rem;
  letter-spacing: 0.03em;
  box-shadow: var(--glass-shadow);
}

.hero__badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-success);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

.hero__title {
  font-size: clamp(2.8rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.03em;
  color: var(--text-heading);
}

.hero__title-gradient {
  background: var(--purple-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  filter: drop-shadow(0 2px 10px rgba(102, 126, 234, 0.3));
}

.hero__subtitle {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto 2.5rem;
  line-height: 1.8;
}

.hero__demo-note {
  margin-top: 1.2rem;
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.35);
  font-style: italic;
  text-align: center;
  letter-spacing: 0.02em;
}

:root[data-theme="light"] .hero__demo-note {
  color: rgba(0, 0, 0, 0.35);
}

.hero__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1.75rem;
  border-radius: var(--radius-md);
  font-weight: var(--fw-semibold);
  font-size: 0.95rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  border: none;
  font-family: var(--font-main);
  text-decoration: none;
}

.btn svg {
  width: 18px;
  height: 18px;
}

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}

.btn--primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 6px 30px var(--accent-glow);
  color: #fff;
}

.btn--secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  color: var(--text-primary);
  border: 1px solid var(--glass-border);
}

.btn--secondary:hover {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* Hero Preview */
.hero__preview {
  margin-top: 4rem;
  position: relative;
}

.hero__preview-glow {
  position: absolute;
  inset: -60px;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 70%);
  z-index: -1;
  border-radius: 50%;
  animation: heroGlow 4s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% { opacity: 0.3; transform: scale(1); }
  100% { opacity: 0.6; transform: scale(1.05); }
}


/* ==================== Section Layout ==================== */
.section {
  padding: 6rem 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
  contain: layout style;
  overflow: visible;
}

.section--wide {
  max-width: 1400px;
}

.section__header {
  text-align: center;
  margin-bottom: 4rem;
}

.section__label {
  display: inline-block;
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.section__title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-heading);
}

.section__subtitle {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin: 0 auto;
}


/* ==================== Feature Cards ==================== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.5rem;
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--purple-gradient);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.feature-card:hover {
  background: var(--card-hover-bg);
  border-color: var(--accent);
  transform: translateY(-3px);
  box-shadow: var(--glass-shadow-lg);
}

.feature-card:hover::before {
  opacity: 1;
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  transition: all var(--transition-normal);
}

.feature-card__icon svg {
  color: inherit;
}

.feature-card__icon--gold {
  background: var(--gold-light);
  border: 1px solid rgba(228, 186, 0, 0.25);
  color: var(--gold);
}

.feature-card__icon--purple {
  background: rgba(102, 126, 234, 0.12);
  border: 1px solid rgba(102, 126, 234, 0.25);
  color: var(--purple);
}

.feature-card__icon--blue {
  background: var(--accent-light);
  border: 1px solid rgba(79, 120, 230, 0.25);
  color: var(--accent);
}

.feature-card:hover .feature-card__icon {
  transform: scale(1.1);
  filter: drop-shadow(0 0 8px currentColor);
}

.feature-card__title {
  font-size: 1.1rem;
  font-weight: var(--fw-bold);
  margin-bottom: 0.5rem;
  color: var(--text-heading);
}

.feature-card__desc {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.7;
}


/* ==================== Showcase ==================== */
.showcase {
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

.showcase__item {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
  gap: 4rem;
  align-items: start;
  contain: layout style;
}

.showcase__item:nth-child(even) {
  direction: rtl;
}

.showcase__item:nth-child(even) > * {
  direction: ltr;
}

.showcase__label {
  color: var(--gold);
  font-size: 0.8rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.5rem;
  display: block;
}

.showcase__title {
  font-size: 1.6rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
  color: var(--text-heading);
}

.showcase__desc {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 1.5rem;
}

.showcase__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.showcase__list li {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--text-secondary);
  font-size: 0.925rem;
}

.showcase__list li strong {
  color: var(--text-heading);
}

.showcase__list li svg {
  width: 18px;
  height: 18px;
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 3px;
}


/* ==================== Tech Stack ==================== */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.tech-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
}

.tech-card:hover {
  border-color: var(--accent);
  background: var(--card-hover-bg);
  transform: translateY(-2px);
  box-shadow: var(--glass-shadow);
}

.tech-card__icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.tech-card__icon--claude { background: rgba(102, 126, 234, 0.12); color: var(--purple); }
.tech-card__icon--python { background: rgba(79, 120, 230, 0.12); color: var(--accent); }
.tech-card__icon--flask { background: rgba(34, 197, 94, 0.12); color: var(--color-success); }
.tech-card__icon--react { background: rgba(79, 172, 254, 0.12); color: #4facfe; }
.tech-card__icon--pywebview { background: rgba(228, 186, 0, 0.12); color: var(--gold); }
.tech-card__icon--sqlite { background: rgba(245, 158, 11, 0.12); color: var(--color-warning); }
.tech-card__icon--sse { background: rgba(118, 75, 162, 0.12); color: var(--purple-dark); }

.tech-card__name {
  font-weight: var(--fw-semibold);
  font-size: 0.925rem;
  color: var(--text-heading);
}

.tech-card__role {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.15rem;
}


/* ==================== Architecture Diagram ==================== */
.architecture {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  overflow-x: auto;
  margin-top: 3rem;
  box-shadow: var(--glass-shadow);
}

.architecture pre {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre;
}


/* ==================== Changelog ==================== */
.changelog {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ── Version Selector ── */
.changelog__selector {
  position: relative;
  width: 100%;
}

.changelog__select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 1rem 3rem 1rem 1.25rem;
  color: var(--text-heading);
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: var(--fw-bold);
  cursor: pointer;
  transition: border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.changelog__select:hover,
.changelog__select:focus {
  border-color: var(--accent);
  box-shadow: var(--glass-shadow);
  outline: none;
}

.changelog__select option {
  background: var(--glass-bg-strong, #1a1a2e);
  color: var(--text-primary);
  padding: 0.5rem;
}

.changelog__select-icon {
  position: absolute;
  right: 1.25rem;
  top: 50%;
  transform: translateY(-50%);
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  pointer-events: none;
}

/* ── Entry card ── */
.changelog__entries {
  display: grid;
}

.changelog__entry {
  grid-row: 1;
  grid-column: 1;
  padding: 1.5rem;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.changelog__entry--active {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.changelog__meta {
  margin-bottom: 1rem;
}

.changelog__tag {
  display: inline-block;
  padding: 0.15rem 0.6rem;
  border-radius: var(--radius-pill);
  font-size: 0.7rem;
  font-weight: var(--fw-bold);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.changelog__tag--refactor { background: var(--tag-refactor); color: var(--tag-refactor-text); }
.changelog__tag--improvement { background: var(--tag-improvement); color: var(--tag-improvement-text); }
.changelog__tag--fix { background: var(--tag-fix); color: var(--tag-fix-text); }
.changelog__tag--redesign { background: var(--tag-redesign); color: var(--tag-redesign-text); }
.changelog__tag--initial { background: var(--tag-initial); color: var(--tag-initial-text); }

.changelog__summary {
  color: var(--text-secondary);
  font-size: 0.925rem;
  line-height: 1.7;
}


/* ==================== Quick Start Section ==================== */
.quick-start {
  max-width: 720px;
  margin: 0 auto;
}

/* Terminal window */
.quick-start__window {
  background: #0d1117;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.3),
    0 1px 3px rgba(0, 0, 0, 0.2),
    inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

/* Title bar: dots | tabs | copy */
.quick-start__titlebar {
  display: flex;
  align-items: center;
  padding: 0 1rem;
  height: 42px;
  background: #161b22;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  gap: 0.75rem;
}

.quick-start__dots {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.quick-start__dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.quick-start__dot--red { background: #ff5f57; }
.quick-start__dot--yellow { background: #febc2e; }
.quick-start__dot--green { background: #28c840; }

/* Tabs inside titlebar */
.quick-start__tabs {
  display: flex;
  align-items: stretch;
  gap: 0;
  flex: 1;
  justify-content: center;
  height: 100%;
}

.quick-start__tab {
  position: relative;
  padding: 0 1rem;
  background: transparent;
  border: none;
  color: rgba(255, 255, 255, 0.35);
  font-family: var(--font-mono);
  font-weight: var(--fw-medium);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color var(--transition-normal);
  white-space: nowrap;
  display: flex;
  align-items: center;
  height: 100%;
}

.quick-start__tab::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px 2px 0 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.quick-start__tab--active {
  color: rgba(255, 255, 255, 0.9);
}

.quick-start__tab--active::after {
  transform: translateX(-50%) scaleX(1);
}

.quick-start__tab:hover:not(.quick-start__tab--active) {
  color: rgba(255, 255, 255, 0.6);
}

/* Copy button */
.quick-start__copy {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  color: rgba(255, 255, 255, 0.4);
  padding: 0.25rem 0.6rem;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: var(--font-main);
  flex-shrink: 0;
}

.quick-start__copy:hover {
  color: var(--gold);
  border-color: rgba(228, 186, 0, 0.4);
  background: rgba(228, 186, 0, 0.08);
}

.quick-start__copy svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.quick-start__copy-label {
  font-size: 0.7rem;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.03em;
}

/* Terminal body panels — transition in/out */
.quick-start__body {
  display: none;
  padding: 1rem 1.25rem;
}

.quick-start__body--active {
  display: block;
  animation: qsBodyIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Single-line (One-Liner) */
.qs-line--single code {
  font-family: var(--font-mono);
  font-size: 0.825rem;
  line-height: 1.75;
  color: #e6edf3;
}

/* Per-line rows (Windows / Manual) */
.qs-line {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.35rem 0.5rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition-normal);
}

.qs-line:hover {
  background: rgba(255, 255, 255, 0.04);
}

.qs-line code {
  flex: 1;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  line-height: 1.6;
  color: #e6edf3;
  white-space: nowrap;
  overflow-x: auto;
}

/* Per-line copy button */
.qs-line__copy {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: 1px solid transparent;
  color: rgba(255, 255, 255, 0.15);
  cursor: pointer;
  transition: all var(--transition-normal);
  opacity: 0;
}

.qs-line:hover .qs-line__copy {
  opacity: 1;
  color: rgba(255, 255, 255, 0.4);
  border-color: rgba(255, 255, 255, 0.08);
}

.qs-line__copy:hover {
  color: var(--gold) !important;
  border-color: rgba(228, 186, 0, 0.4) !important;
  background: rgba(228, 186, 0, 0.08);
}

.qs-line__copy svg {
  width: 14px;
  height: 14px;
}

/* Comment lines */
.qs-comment-line {
  margin: 0;
  padding: 0.2rem 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: rgba(139, 148, 158, 0.5);
  font-style: italic;
  line-height: 1.6;
}

.qs-comment-line:first-child {
  padding-top: 0.1rem;
}

/* Syntax colors */
.qs-cmd { color: #79c0ff; }
.qs-comment { color: rgba(139, 148, 158, 0.5); font-style: italic; }
.qs-op { color: var(--gold); }
.qs-prompt { color: #28c840; font-weight: var(--fw-bold); user-select: none; }

/* Note text below terminal */
.quick-start__note {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-top: 0.85rem;
  line-height: 1.5;
}

/* Links row */
.quick-start__links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-top: 2rem;
}

.quick-start__link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: var(--fw-semibold);
  text-decoration: none;
  transition: color var(--transition-normal);
}

.quick-start__link:hover {
  color: var(--accent);
}

.quick-start__link svg {
  flex-shrink: 0;
}

/* ── Install / Quick-Start Light Mode ── */
:root[data-theme="light"] .quick-start__window {
  background: #f5f7fa;
  border-color: rgba(0, 0, 0, 0.1);
  box-shadow:
    0 4px 24px rgba(0, 0, 0, 0.08),
    0 1px 3px rgba(0, 0, 0, 0.05),
    inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

:root[data-theme="light"] .quick-start__titlebar {
  background: #eaecf0;
  border-bottom-color: rgba(0, 0, 0, 0.08);
}

:root[data-theme="light"] .quick-start__tab {
  color: rgba(58, 58, 74, 0.45);
}

:root[data-theme="light"] .quick-start__tab--active {
  color: #1a1a2e;
}

:root[data-theme="light"] .quick-start__tab:hover:not(.quick-start__tab--active) {
  color: rgba(58, 58, 74, 0.7);
}

:root[data-theme="light"] .quick-start__copy {
  color: rgba(58, 58, 74, 0.4);
  border-color: rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .quick-start__copy:hover {
  color: #b8860b;
  border-color: rgba(184, 134, 11, 0.4);
  background: rgba(184, 134, 11, 0.06);
}

:root[data-theme="light"] .qs-line--single code,
:root[data-theme="light"] .qs-line code {
  color: #1a1a2e;
}

:root[data-theme="light"] .qs-line:hover {
  background: rgba(0, 0, 0, 0.03);
}

:root[data-theme="light"] .qs-line:hover .qs-line__copy {
  color: rgba(58, 58, 74, 0.4);
  border-color: rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .qs-line__copy:hover {
  color: #b8860b !important;
  border-color: rgba(184, 134, 11, 0.4) !important;
  background: rgba(184, 134, 11, 0.06);
}

:root[data-theme="light"] .qs-cmd { color: #2563eb; }
:root[data-theme="light"] .qs-comment { color: rgba(106, 106, 122, 0.6); }
:root[data-theme="light"] .qs-op { color: #b8860b; }
:root[data-theme="light"] .qs-prompt { color: #16a34a; }

:root[data-theme="light"] .qs-comment-line {
  color: rgba(106, 106, 122, 0.5);
}


/* ==================== CTA Banner — Aero Glass ==================== */
.cta {
  text-align: center;
  padding: 6rem 2rem;
  position: relative;
}

.cta__inner {
  max-width: 800px;
  margin: 0 auto;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(40px) saturate(1.6);
  -webkit-backdrop-filter: blur(40px) saturate(1.6);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-xl);
  padding: 4rem 3rem;
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.12),
    0 1px 0 rgba(255, 255, 255, 0.08) inset,
    0 -1px 0 rgba(0, 0, 0, 0.05) inset;
  position: relative;
  overflow: hidden;
}

:root[data-theme="light"] .cta__inner {
  background: rgba(255, 255, 255, 0.45);
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow:
    0 8px 32px rgba(0, 0, 0, 0.06),
    0 1px 0 rgba(255, 255, 255, 0.9) inset,
    0 -1px 0 rgba(0, 0, 0, 0.03) inset;
}

/* Subtle gradient glow behind the card */
.cta__glow {
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 120%;
  background: radial-gradient(ellipse at center, rgba(102, 126, 234, 0.12) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

:root[data-theme="light"] .cta__glow {
  background: radial-gradient(ellipse at center, rgba(102, 126, 234, 0.08) 0%, transparent 70%);
}

.cta__inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}

.cta__title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  color: var(--text-heading);
  position: relative;
  z-index: 1;
}

.cta__desc {
  color: var(--text-secondary);
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 2rem;
  position: relative;
  z-index: 1;
}

.cta__actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

/* Glass button variant */
.btn--glass {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-pill);
  color: var(--text-primary);
  font-weight: var(--fw-medium);
  font-size: 0.95rem;
  text-decoration: none;
  transition: all var(--transition-normal);
  cursor: pointer;
}

.btn--glass:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
}

:root[data-theme="light"] .btn--glass {
  background: rgba(255, 255, 255, 0.5);
  border-color: rgba(0, 0, 0, 0.1);
  color: var(--text-primary);
}

:root[data-theme="light"] .btn--glass:hover {
  background: rgba(255, 255, 255, 0.7);
  border-color: rgba(0, 0, 0, 0.15);
}


/* ==================== Footer ==================== */
.footer {
  border-top: 1px solid var(--glass-border);
  padding: 3rem 2rem;
}

.footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer__left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.footer__name {
  font-weight: var(--fw-bold);
  font-size: 1rem;
  color: var(--text-heading);
}

.footer__sep {
  color: var(--text-muted);
}

.footer__copy {
  color: var(--text-muted);
  font-size: 0.85rem;
}

.footer__links {
  display: flex;
  gap: 1.5rem;
}

.footer__links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: var(--fw-medium);
}

.footer__links a:hover {
  color: var(--accent);
}


/* ==================== Animations ==================== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

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

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}


/* ==================== Responsive ==================== */
@media (max-width: 900px) {
  .showcase__item {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .showcase__item:nth-child(even) {
    direction: ltr;
  }

  .nav__links {
    display: none;
  }

  .nav__toggle {
    display: block;
  }

  .nav__right {
    gap: 0.5rem;
  }

  .nav__cta {
    padding: 0.5rem;
    gap: 0;
  }

  .nav__cta-text {
    display: none;
  }

  .nav__cta svg {
    width: 18px;
    height: 18px;
  }

  .nav__links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: var(--glass-bg-strong);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    animation: fadeIn 0.2s ease;
  }
}

@media (max-width: 600px) {
  .section {
    padding: 4rem 1.25rem;
  }

  .hero {
    padding: 6rem 1.25rem 3rem;
  }

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

  .tech-grid {
    grid-template-columns: 1fr;
  }

  .quick-start__tab {
    padding: 0 0.6rem;
    font-size: 0.65rem;
  }

  .qs-line code {
    font-size: 0.72rem;
  }

  .qs-line--single code {
    font-size: 0.72rem;
  }

  .qs-line__copy {
    opacity: 1;
    color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.06);
    width: 24px;
    height: 24px;
  }

  .quick-start__copy-label {
    display: none;
  }

  .changelog__entry {
    /* handled by dropdown — no layout change needed */
  }

  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    justify-content: center;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .cta__inner {
    padding: 3rem 1.5rem;
  }

  /* Reduce blob sizes on mobile */
  .bg-blob--1, .bg-blob--2 { filter: blur(80px); }
  .bg-blob--3, .bg-blob--4, .bg-blob--5 { filter: blur(60px); }
  .bg-blob--6 { filter: blur(40px); }
}