/* ========================================
   ZEXFAM — Design System & Landing Page
   Deep Motion Edition
   ======================================== */

/* — Google Fonts — */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Space+Grotesk:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* — CSS Custom Properties — */
:root {
  /* Motion Colors (Claude Club style) */
  --motion-a: #a78bfa;
  --motion-b: #06d6a0;
  --motion-c: #141033;
  --motion-speed: 13s;

  /* Cursor tracking vars */
  --px: 0px;
  --py: 0px;
  --back-x: 0px;
  --back-y: 0px;
  --signal-x: 0px;
  --signal-y: 0px;
  --spot-x: 50%;
  --spot-y: 50%;
  --mouse-x: 50%;
  --mouse-y: 50%;

  /* Deep Purple & Orange Motion Theme (Claude Club style) */
  --bg-primary: #1a0833; /* Deep Purple Background based on scene-c #511c8f but darker for contrast */
  --bg-secondary: #26114a;
  --bg-card: #2c1654;
  --bg-card-hover: #391e6b;
  --bg-surface: #200d3d;
  --bg-glass: rgba(81, 28, 143, 0.4);
  --bg-glass-light: rgba(255, 255, 255, 0.05);

  /* Claude Club Scene Colors */
  --scene-a: #ff6b3d;
  --scene-b: #ffb36b;
  --scene-c: #511c8f;
  
  --accent-violet: #ff6b3d; /* Orange */
  --accent-violet-light: #ff8e6b;
  --accent-violet-glow: rgba(255, 107, 61, 0.35);
  --accent-cyan: #ffb36b; /* Light Orange */
  --accent-cyan-glow: rgba(255, 179, 107, 0.25);
  --accent-amber: #f59e0b;
  --accent-amber-glow: rgba(245, 158, 11, 0.25);
  --accent-rose: #511c8f; /* Deep Purple */
  --accent-rose-glow: rgba(81, 28, 143, 0.4);
  --accent-blue: #3b82f6;
  --accent-blue-glow: rgba(59, 130, 246, 0.25);

  --text-primary: #fffaf2; /* scene-ink */
  --text-secondary: #d4c5e3;
  --text-muted: #9681b3;
  --text-inverse: #1a0833;

  --border-subtle: rgba(255, 250, 242, 0.1);
  --border-light: rgba(255, 250, 242, 0.2);
  --border-accent: rgba(255, 107, 61, 0.4);

  /* Typography */
  --font-sans: 'Inter', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --font-heading: 'Inter', var(--font-sans); /* Used tighter sans-serif for headings */
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;

  /* Spacing */
  --space-xs: 4px; --space-sm: 8px; --space-md: 16px; --space-lg: 24px;
  --space-xl: 32px; --space-2xl: 48px; --space-3xl: 64px; --space-4xl: 96px;

  /* Radius */
  --radius-sm: 8px; --radius-md: 12px; --radius-lg: 16px;
  --radius-xl: 24px; --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-glow-violet: 0 0 40px var(--accent-violet-glow);
  --shadow-glow-cyan: 0 0 40px var(--accent-cyan-glow);

  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* — Reset — */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
body { font-family: var(--font-sans); background: var(--bg-primary); color: var(--text-primary); line-height: 1.6; overflow-x: hidden; transition: background 0.6s cubic-bezier(0.22, 1, 0.36, 1), color 0.6s cubic-bezier(0.22, 1, 0.36, 1); }
a { color: inherit; text-decoration: none; }
img, video { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul, ol { list-style: none; }

/* — Utilities — */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 var(--space-lg); }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 var(--space-lg); }
.text-gradient {
  background: linear-gradient(135deg, var(--accent-violet-light), var(--accent-cyan));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ========================================
   DEEP MOTION KEYFRAMES
   (From Claude Club Motion Library)
   ======================================== */

@keyframes cc-spin {
  to { transform: translate3d(var(--back-x), var(--back-y), 0) rotate(360deg); }
}
@keyframes cc-breathe {
  to { transform: scale(1.2) translate3d(8%, -6%, 0); }
}
@keyframes cc-orbit {
  to { rotate: 360deg; }
}
@keyframes cc-drift {
  to { background-position: 56px 56px; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 20px var(--accent-violet-glow); }
  50% { box-shadow: 0 0 40px var(--accent-violet-glow), 0 0 60px rgba(124,58,237,0.15); }
}
@keyframes blob-morph {
  0%, 100% { border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%; }
  25% { border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%; }
  50% { border-radius: 50% 60% 30% 60% / 30% 40% 70% 60%; }
  75% { border-radius: 60% 30% 50% 40% / 60% 70% 30% 50%; }
}
@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}
@keyframes scroll-x {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@keyframes border-rotate {
  0% { --border-angle: 0deg; }
  100% { --border-angle: 360deg; }
}
@keyframes ripple-out {
  0% { transform: scale(0); opacity: 0.5; }
  100% { transform: scale(4); opacity: 0; }
}
@keyframes particle-float {
  0% { transform: translateY(0) translateX(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-120vh) translateX(40px); opacity: 0; }
}

/* Click ripple effect */
.click-ripple {
  position: fixed;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--accent-violet-light), transparent);
  pointer-events: none;
  animation: ripple-out 0.6s ease-out forwards;
  z-index: 9999;
}

/* — Scroll animations — */
.animate-on-scroll {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.animate-on-scroll.is-visible { opacity: 1; transform: translateY(0); }
.animate-on-scroll.delay-1 { transition-delay: 100ms; }
.animate-on-scroll.delay-2 { transition-delay: 200ms; }
.animate-on-scroll.delay-3 { transition-delay: 300ms; }
.animate-on-scroll.delay-4 { transition-delay: 400ms; }
.animate-on-scroll.delay-5 { transition-delay: 500ms; }
.animate-on-scroll.delay-6 { transition-delay: 600ms; }

/* ========================================
   NAVIGATION
   ======================================== */

.landing-nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  padding: var(--space-md) var(--space-lg);
  transition: background var(--transition-base), box-shadow var(--transition-base);
}
.landing-nav.scrolled {
  background: var(--bg-primary);
  opacity: 0.95;
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex;  align-items: center; justify-content: space-between;
  padding: 0 var(--space-xl);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}
.nav-logo {
  display: flex; align-items: center; gap: var(--space-sm);
  font-family: var(--font-heading); font-weight: 700; font-size: 22px; letter-spacing: -0.02em;
}
.nav-logo .logo-icon {
  width: 36px; height: 36px;
  background: var(--text-primary);
  border-radius: var(--radius-sm); display: grid; place-items: center;
  font-weight: 800; font-size: 16px; color: var(--bg-primary);
  position: relative; overflow: hidden;
}
.nav-logo .logo-icon::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 40%, rgba(255,255,255,0.2));
}
.nav-links { display: flex; align-items: center; gap: var(--space-xl); }
.nav-links a {
  font-size: 14px; font-weight: 500; color: var(--text-secondary);
  transition: color var(--transition-fast); position: relative;
}
.nav-links a::after {
  content: ''; position: absolute; bottom: -4px; left: 0;
  width: 0; height: 2px; background: var(--accent-violet); border-radius: 1px;
  transition: width var(--transition-base);
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: var(--space-md); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-sm);
  font-weight: 600; font-size: 14px; border-radius: var(--radius-pill);
  padding: 10px 22px; transition: all var(--transition-base); white-space: nowrap;
  position: relative; overflow: hidden;
}
.btn-ghost { color: var(--text-secondary); border: 1px solid var(--border-light); }
.btn-ghost:hover { color: var(--text-primary); border-color: var(--accent-violet); background: var(--bg-glass-light); }

.btn-primary {
  background: var(--accent-violet); color: white; border: 1px solid transparent;
}
.btn-primary::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,0.15) 50%, transparent 100%);
  transform: translateX(-100%); transition: transform 0.5s ease;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--shadow-glow-violet); }
.btn-primary:hover::before { transform: translateX(100%); }
.btn-primary:active { transform: translateY(0) scale(0.97); }

.btn-large { padding: 14px 32px; font-size: 16px; }
.btn-secondary {
  background: var(--bg-glass); backdrop-filter: blur(10px);
  color: var(--text-primary); border: 1px solid var(--border-light);
}
.btn-secondary:hover { background: var(--bg-card-hover); border-color: var(--border-accent); transform: translateY(-2px); }

.mobile-menu-btn { display: none; width: 40px; height: 40px; border-radius: var(--radius-sm); align-items: center; justify-content: center; color: var(--text-primary); }
.mobile-menu-btn svg { width: 24px; height: 24px; }
.mobile-menu {
  display: none; position: fixed; inset: 0; z-index: 200;
  background: rgba(10, 15, 30, 0.95); backdrop-filter: blur(24px); -webkit-backdrop-filter: blur(24px);
  padding: var(--space-2xl) var(--space-lg); flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-xl); opacity: 0; pointer-events: none; transition: opacity var(--transition-slow);
}
.mobile-menu.open { opacity: 1; pointer-events: all; }
.mobile-menu a { font-family: var(--font-heading); font-size: 28px; font-weight: 600; color: var(--text-secondary); transition: color var(--transition-fast); }
.mobile-menu a:hover { color: var(--text-primary); }
.mobile-menu-close { position: absolute; top: var(--space-lg); right: var(--space-lg); width: 44px; height: 44px; display: grid; place-items: center; border-radius: var(--radius-sm); color: var(--text-secondary); }
.mobile-menu-close:hover { color: var(--text-primary); }

/* ========================================
   HERO — Claude Club Motion System
   ======================================== */

.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--space-4xl) 0 var(--space-3xl);
  overflow: hidden;
  isolation: isolate;
  background: var(--bg-primary);
}

/* Motion Field — spinning conic gradient */
.motion-field,
.motion-field::before,
.motion-field::after {
  position: absolute;
  content: "";
  pointer-events: none;
  will-change: transform;
}
.motion-field {
  inset: -30%;
  z-index: -3;
  border-radius: 42%;
  background: conic-gradient(from 30deg, var(--scene-a), transparent 26%, var(--scene-b), transparent 56%, var(--scene-a));
  filter: blur(64px);
  opacity: 0.6;
  transform: translate3d(var(--back-x), var(--back-y), 0);
  animation: cc-spin 30s linear infinite;
}
.motion-field::before {
  inset: 25%;
  border-radius: 50%;
  background: radial-gradient(circle, var(--scene-b), transparent 66%);
  animation: cc-breathe 15s ease-in-out infinite alternate;
}
.motion-field::after {
  inset: 12%;
  border: 1px solid rgba(255, 250, 242, 0.12);
  border-radius: 48% 52% 62% 38%;
  animation: cc-orbit 20s linear infinite;
}

/* Motion Grid — subtle perspective 3D grid */
.motion-grid {
  position: absolute;
  inset: -45%;
  z-index: -2;
  opacity: 0.25;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 56px 56px;
  transform: perspective(700px) rotateX(64deg) translateY(27%);
  animation: cc-drift 20s linear infinite;
  pointer-events: none;
}

/* Motion Spotlight — subtle light effect */
.motion-spotlight {
  position: absolute;
  inset: 0;
  z-index: -1;
  background: radial-gradient(circle 420px at var(--spot-x) var(--spot-y), rgba(255, 107, 61, 0.15), transparent 72%);
  pointer-events: none;
  transition: opacity 0.3s ease;
}

/* Motion Signal orb */
.motion-signal {
  position: absolute;
  right: clamp(22px, 7vw, 110px);
  bottom: clamp(28px, 8vw, 100px);
  display: grid;
  width: clamp(120px, 18vw, 260px);
  aspect-ratio: 1;
  place-items: center;
  border: 1px solid var(--border-subtle);
  border-radius: 50%;
  transform: translate3d(var(--signal-x), var(--signal-y), 0);
  animation: cc-orbit 20s linear infinite;
  pointer-events: none;
}
.motion-signal::before,
.motion-signal::after {
  position: absolute;
  content: "";
  border: inherit;
  border-radius: inherit;
}
.motion-signal::before { inset: 18%; }
.motion-signal::after {
  inset: 38%;
  background: var(--accent-violet);
  filter: blur(15px);
  opacity: 0.3;
  border: none;
}

/* Floating particles */
.particles {
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}
.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--accent-violet);
  border-radius: 50%;
  opacity: 0;
  animation: particle-float linear infinite;
}

/* Hero content (moves with cursor) */
.hero-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  animation: fadeInUp 0.8s ease both;
  transform: translate3d(var(--px), var(--py), 0);
  transition: transform 120ms ease-out;
}

.hero-badge {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  padding: 6px 16px; background: var(--bg-glass); backdrop-filter: blur(10px);
  border: 1px solid var(--border-light); border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 500; color: var(--text-secondary); margin-bottom: var(--space-lg);
}
.hero-badge .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent-cyan); box-shadow: 0 0 12px var(--accent-cyan-glow);
  animation: pulse-glow 2s ease-in-out infinite;
  --accent-violet-glow: var(--accent-cyan-glow);
}
.hero-badge span { color: var(--text-muted); margin: 0 2px; }

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(48px, 7vw, 92px);
  font-weight: 700; line-height: 0.95; letter-spacing: -0.05em;
  margin-bottom: var(--space-lg);
}
.hero-title .highlight { position: relative; display: inline; font-style: italic; color: var(--accent-violet); font-family: 'Times New Roman', Times, serif; font-weight: 500; }
.hero-title .highlight::after { display: none; }

.hero-subtitle {
  font-size: clamp(16px, 2vw, 20px); color: var(--text-secondary);
  max-width: 520px; margin-bottom: var(--space-xl); line-height: 1.7;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--space-md); margin-bottom: var(--space-2xl); }

.hero-stats { display: flex; gap: var(--space-2xl); }
.hero-stat { text-align: left; }
.hero-stat .number { font-family: var(--font-heading); font-size: 28px; font-weight: 700; letter-spacing: -0.02em; }
.hero-stat .label { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* Hero visual with depth */
.hero-visual {
  position: relative;
  animation: fadeIn 0.8s ease 0.3s both;
  transform: translate3d(calc(var(--px) * -0.5), calc(var(--py) * -0.5), 0);
  transition: transform 120ms ease-out;
}

.hero-mockup {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  box-shadow: var(--shadow-lg), var(--shadow-glow-violet);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}
.hero-mockup:hover {
  transform: translateY(-8px) scale(1.01);
  box-shadow: var(--shadow-lg), 0 0 60px var(--accent-violet-glow);
}

.mockup-topbar {
  display: flex; align-items: center; gap: var(--space-sm);
  margin-bottom: var(--space-md); padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border-subtle);
}
.mockup-dot { width: 10px; height: 10px; border-radius: 50%; }
.mockup-dot:nth-child(1) { background: #f43f5e; }
.mockup-dot:nth-child(2) { background: #f59e0b; }
.mockup-dot:nth-child(3) { background: #06d6a0; }
.mockup-title { margin-left: auto; font-size: 12px; color: var(--text-muted); font-family: var(--font-mono); }

.mockup-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-md); }
.mockup-card {
  background: var(--bg-surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: var(--space-md);
  transition: all 0.2s ease;
}
.mockup-card:hover {
  border-color: var(--border-accent);
  transform: translateY(-2px);
}
.mockup-card-icon { width: 32px; height: 32px; border-radius: var(--radius-sm); display: grid; place-items: center; font-size: 16px; margin-bottom: var(--space-sm); }
.mockup-card-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-xs); }
.mockup-card-value { font-family: var(--font-heading); font-size: 22px; font-weight: 700; }
.mockup-card-bar { height: 4px; background: var(--bg-primary); border-radius: 2px; margin-top: var(--space-sm); overflow: hidden; }
.mockup-card-bar-fill { height: 100%; border-radius: 2px; transition: width 1.5s ease; }

/* Floating cards with depth */
.hero-float-card {
  position: absolute; background: var(--bg-glass); backdrop-filter: blur(16px);
  border: 1px solid var(--border-light); border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md); display: flex; align-items: center; gap: var(--space-sm);
  font-size: 13px; font-weight: 500; box-shadow: var(--shadow-md);
  animation: float 6s ease-in-out infinite; white-space: nowrap;
  cursor: pointer; transition: all 0.2s ease;
}
.hero-float-card:hover {
  border-color: var(--accent-violet);
  box-shadow: var(--shadow-glow-violet);
  transform: translateY(-4px) scale(1.05);
}
.hero-float-card.card-streak { top: 15%; right: -10%; animation-delay: 0s; }
.hero-float-card.card-xp { bottom: 20%; left: -8%; animation-delay: 2s; }
.hero-float-card .float-icon { width: 28px; height: 28px; border-radius: var(--radius-sm); display: grid; place-items: center; font-size: 14px; }

/* ========================================
   FEATURES — Animated Border Cards
   ======================================== */

.features-section { padding: var(--space-4xl) 0; position: relative; }

/* Section spotlight bg */
.features-section::before {
  content: '';
  position: absolute;
  top: 20%; left: 50%;
  width: 600px; height: 600px;
  background: radial-gradient(circle, var(--accent-violet-glow), transparent 70%);
  transform: translateX(-50%);
  pointer-events: none;
  opacity: 0.3;
}

.section-header { text-align: center; margin-bottom: var(--space-3xl); }
.section-eyebrow {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  font-family: var(--font-mono); font-size: 13px; font-weight: 500;
  color: var(--accent-violet-light); text-transform: uppercase; letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
}
.section-title {
  font-family: var(--font-heading); font-size: clamp(32px, 4vw, 52px);
  font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--space-md);
}
.section-subtitle { font-size: clamp(16px, 2vw, 18px); color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md); position: relative; z-index: 1;
}

/* Card with animated border glow */
.feature-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: var(--space-xl);
  position: relative; overflow: hidden; transition: all var(--transition-base);
  cursor: pointer;
}

/* Animated radial gradient that follows cursor */
.feature-card::before {
  content: '';
  position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(124,58,237,0.08), transparent 40%);
  opacity: 0; transition: opacity var(--transition-base);
}

/* Clean hover style without border glow */
.feature-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-light);
}
.feature-card:hover::before { opacity: 1; }
.feature-card:hover::after { opacity: 1; }

/* Click effect on cards */
.feature-card:active {
  transform: translateY(-2px) scale(0.98);
  transition: transform 0.1s ease;
}

.feature-card-icon {
  width: 52px; height: 52px; border-radius: var(--radius-md);
  display: grid; place-items: center; font-size: 24px;
  margin-bottom: var(--space-lg); position: relative;
  transition: transform 0.3s ease;
}
.feature-card:hover .feature-card-icon {
  transform: scale(1.1) rotate(-5deg);
}

.feature-card-icon::after {
  content: ''; position: absolute; inset: -4px; border-radius: inherit;
  opacity: 0.3; filter: blur(12px);
}
.feature-card h3 { font-family: var(--font-heading); font-size: 20px; font-weight: 600; margin-bottom: var(--space-sm); letter-spacing: -0.01em; }
.feature-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.6; }
.feature-card .feature-tag {
  display: inline-flex; padding: 4px 10px; border-radius: var(--radius-pill);
  font-size: 11px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; margin-top: var(--space-md);
}

/* Feature card color variants */
.feature-card.ai-radar .feature-card-icon { background: rgba(124,58,237,0.15); color: var(--accent-violet-light); }
.feature-card.ai-radar .feature-card-icon::after { background: var(--accent-violet); }
.feature-card.ai-radar .feature-tag { background: rgba(124,58,237,0.12); color: var(--accent-violet-light); }
.feature-card.study-hub .feature-card-icon { background: rgba(6,214,160,0.15); color: var(--accent-cyan); }
.feature-card.study-hub .feature-card-icon::after { background: var(--accent-cyan); }
.feature-card.study-hub .feature-tag { background: rgba(6,214,160,0.12); color: var(--accent-cyan); }
.feature-card.skill-builder .feature-card-icon { background: rgba(59,130,246,0.15); color: var(--accent-blue); }
.feature-card.skill-builder .feature-card-icon::after { background: var(--accent-blue); }
.feature-card.skill-builder .feature-tag { background: rgba(59,130,246,0.12); color: var(--accent-blue); }
.feature-card.career-hub .feature-card-icon { background: rgba(245,158,11,0.15); color: var(--accent-amber); }
.feature-card.career-hub .feature-card-icon::after { background: var(--accent-amber); }
.feature-card.career-hub .feature-tag { background: rgba(245,158,11,0.12); color: var(--accent-amber); }
.feature-card.english-lab .feature-card-icon { background: rgba(244,63,94,0.15); color: var(--accent-rose); }
.feature-card.english-lab .feature-card-icon::after { background: var(--accent-rose); }
.feature-card.english-lab .feature-tag { background: rgba(244,63,94,0.12); color: var(--accent-rose); }
.feature-card.my-campus .feature-card-icon { background: rgba(139,92,246,0.15); color: #c084fc; }
.feature-card.my-campus .feature-card-icon::after { background: #8b5cf6; }
.feature-card.my-campus .feature-tag { background: rgba(139,92,246,0.12); color: #c084fc; }

/* ========================================
   DASHBOARD PREVIEW — Deep Parallax
   ======================================== */

.preview-section { padding: var(--space-4xl) 0; position: relative; overflow: hidden; }

/* Background orbs for section */
.preview-section::before {
  content: ''; position: absolute; top: -200px; right: -200px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(6,214,160,0.1), transparent 70%);
  border-radius: 50%; pointer-events: none;
  animation: cc-breathe 12s ease-in-out infinite alternate;
}
.preview-section::after {
  content: ''; position: absolute; bottom: -200px; left: -200px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.08), transparent 70%);
  border-radius: 50%; pointer-events: none;
  animation: cc-breathe 15s ease-in-out infinite alternate-reverse;
}

.preview-frame { max-width: 1100px; margin: 0 auto; padding: 0 var(--space-lg); position: relative; z-index: 1; }

.preview-window {
  position: relative; background: var(--bg-card);
  border: 1px solid var(--border-light); border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg), 0 0 80px rgba(124,58,237,0.08);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.preview-window:hover {
  box-shadow: var(--shadow-lg), 0 0 120px rgba(124,58,237,0.12);
}

.preview-bar {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-surface); border-bottom: 1px solid var(--border-subtle);
}
.preview-bar-dots { display: flex; gap: 6px; }
.preview-bar-dots span { width: 12px; height: 12px; border-radius: 50%; transition: transform 0.2s ease; }
.preview-bar-dots span:nth-child(1) { background: #f43f5e; }
.preview-bar-dots span:nth-child(2) { background: #f59e0b; }
.preview-bar-dots span:nth-child(3) { background: #06d6a0; }
.preview-bar-dots span:hover { transform: scale(1.3); }

.preview-bar-url {
  flex: 1; background: var(--bg-primary); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm); padding: 6px 14px;
  font-family: var(--font-mono); font-size: 12px; color: var(--text-muted);
  max-width: 400px; margin: 0 auto; text-align: center;
}

.preview-content { aspect-ratio: 16/9; background: var(--bg-primary); display: flex; overflow: hidden; }

.preview-sidebar {
  width: 220px; background: var(--bg-secondary);
  border-right: 1px solid var(--border-subtle); padding: var(--space-lg) var(--space-md); flex-shrink: 0;
}
.preview-sidebar-logo { font-family: var(--font-heading); font-weight: 700; font-size: 16px; margin-bottom: var(--space-xl); padding-left: var(--space-sm); }
.preview-sidebar-item {
  display: flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md); border-radius: var(--radius-sm);
  font-size: 13px; color: var(--text-muted); margin-bottom: 2px;
  transition: all 0.15s ease; cursor: pointer;
}
.preview-sidebar-item:hover { background: var(--bg-glass-light); color: var(--text-primary); }
.preview-sidebar-item.active { background: var(--accent-violet); color: white; }

.preview-main { flex: 1; padding: var(--space-xl); overflow: hidden; }
.preview-welcome { font-family: var(--font-heading); font-size: 20px; font-weight: 600; margin-bottom: var(--space-lg); }
.preview-stats-row { display: flex; gap: var(--space-md); margin-bottom: var(--space-lg); }
.preview-stat-card {
  flex: 1; background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: var(--space-md);
}
.preview-stat-card .stat-label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.preview-stat-card .stat-value { font-family: var(--font-heading); font-size: 24px; font-weight: 700; margin-top: 4px; }
.preview-cards-row { display: flex; gap: var(--space-md); }
.preview-task-card {
  flex: 1; background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: var(--space-md); min-height: 120px;
}
.preview-task-card .card-title { font-size: 13px; font-weight: 600; margin-bottom: var(--space-sm); }

/* ========================================
   HOW IT WORKS
   ======================================== */

.how-section { padding: var(--space-4xl) 0; }
.steps-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-xl); position: relative;
}
.steps-grid::before {
  content: ''; position: absolute; top: 40px; left: 15%; right: 15%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-violet), var(--accent-cyan), var(--accent-amber));
  opacity: 0.3;
}
.step-card { text-align: center; position: relative; }
.step-number {
  width: 80px; height: 80px; margin: 0 auto var(--space-lg);
  border-radius: 50%; background: var(--bg-card); border: 2px solid var(--border-accent);
  display: grid; place-items: center; font-family: var(--font-heading);
  font-size: 28px; font-weight: 700; position: relative; z-index: 1;
  transition: all 0.3s ease;
}
.step-card:hover .step-number {
  transform: scale(1.1);
  box-shadow: var(--shadow-glow-violet);
  border-color: var(--accent-violet);
}
.step-card h3 { font-family: var(--font-heading); font-size: 20px; font-weight: 600; margin-bottom: var(--space-sm); }
.step-card p { font-size: 14px; color: var(--text-secondary); max-width: 280px; margin: 0 auto; }

/* ========================================
   ANIMATED STRIP SECTION
   ======================================== */
.how-strip {
  padding: 30px 0;
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  background: var(--bg-card);
  overflow: hidden;
  white-space: nowrap;
  position: relative;
}
/* Fade edges */
.how-strip::before, .how-strip::after {
  content: '';
  position: absolute;
  top: 0; bottom: 0;
  width: 100px;
  z-index: 2;
  pointer-events: none;
}
.how-strip::before {
  left: 0;
  background: linear-gradient(to right, var(--bg-card), transparent);
}
.how-strip::after {
  right: 0;
  background: linear-gradient(to left, var(--bg-card), transparent);
}
.strip-content {
  display: inline-flex;
  gap: 80px;
  padding-left: 80px;
  animation: strip-scroll 25s linear infinite;
}
.strip-content:hover {
  animation-play-state: paused;
}
.strip-content > div {
  display: inline-flex;
  align-items: center;
  gap: 16px;
}
.strip-content span {
  font-family: var(--font-mono);
  color: var(--accent-violet);
  font-size: 14px;
  font-weight: 600;
}
.strip-content strong {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}
.strip-content p {
  font-size: 16px;
  color: var(--text-secondary);
  margin: 0;
}
@keyframes strip-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ========================================
   FEATURES BENTO GRID
   ======================================== */

/* ========================================
   TESTIMONIALS
   ======================================== */

.testimonials-section { padding: var(--space-4xl) 0; overflow: hidden; }
.testimonials-track {
  display: flex; gap: var(--space-lg); padding: var(--space-md) 0;
  animation: scroll-x 40s linear infinite;
}
.testimonial-card {
  flex-shrink: 0; width: 380px; background: var(--bg-card);
  border: 1px solid var(--border-subtle); border-radius: var(--radius-lg);
  padding: var(--space-xl); transition: all var(--transition-base);
}
.testimonial-card:hover { border-color: var(--border-accent); transform: translateY(-4px); box-shadow: var(--shadow-glow-violet); }
.testimonial-stars { display: flex; gap: 2px; margin-bottom: var(--space-md); color: var(--accent-amber); font-size: 16px; }
.testimonial-text { font-size: 15px; line-height: 1.7; color: var(--text-secondary); margin-bottom: var(--space-lg); }
.testimonial-author { display: flex; align-items: center; gap: var(--space-md); }
.testimonial-avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--accent-violet), var(--accent-cyan)); display: grid; place-items: center; font-weight: 700; font-size: 16px; }
.testimonial-name { font-weight: 600; font-size: 14px; }
.testimonial-role { font-size: 12px; color: var(--text-muted); }

/* ========================================
   PRICING
   ======================================== */

.pricing-section { padding: var(--space-4xl) 0; }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); max-width: 1000px; margin: 0 auto; }

.pricing-card {
  background: var(--bg-card); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl); padding: var(--space-xl);
  position: relative; transition: all var(--transition-base);
  overflow: hidden;
}
.pricing-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }

.pricing-card.featured { border-color: var(--accent-violet); box-shadow: var(--shadow-glow-violet); }
.pricing-card.featured::before { opacity: 0.4; }
.pricing-card.featured::after {
  content: 'Most Popular'; position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--accent-violet); color: white; font-size: 12px; font-weight: 600;
  padding: 4px 16px; border-radius: var(--radius-pill);
}

.pricing-tier { font-family: var(--font-heading); font-size: 18px; font-weight: 600; margin-bottom: var(--space-sm); }
.pricing-price { font-family: var(--font-heading); font-size: 48px; font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--space-xs); }
.pricing-price span { font-size: 16px; color: var(--text-muted); font-weight: 400; }
.pricing-desc { font-size: 14px; color: var(--text-secondary); margin-bottom: var(--space-xl); padding-bottom: var(--space-xl); border-bottom: 1px solid var(--border-subtle); }
.pricing-features { margin-bottom: var(--space-xl); }
.pricing-features li { display: flex; align-items: center; gap: var(--space-sm); font-size: 14px; color: var(--text-secondary); padding: 6px 0; }
.pricing-features li::before { content: '✓'; color: var(--accent-cyan); font-weight: 700; font-size: 14px; }
.pricing-btn { width: 100%; text-align: center; }

/* ========================================
   CTA
   ======================================== */

.cta-section { padding: var(--space-4xl) 0; }
.cta-box {
  max-width: 900px; margin: 0 auto;
  background: var(--bg-card);
  border: 1px solid var(--border-light); border-radius: var(--radius-xl);
  padding: var(--space-3xl); text-align: center;
  position: relative; overflow: hidden;
}
.cta-box::before {
  content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%;
  background: conic-gradient(from 0deg, transparent 0deg, var(--accent-violet) 60deg, transparent 120deg);
  opacity: 0.05; animation: cc-spin 20s linear infinite;
  --back-x: 0px; --back-y: 0px;
}
.cta-title { font-family: var(--font-heading); font-size: clamp(28px, 4vw, 44px); font-weight: 700; letter-spacing: -0.03em; margin-bottom: var(--space-md); position: relative; }
.cta-subtitle { font-size: 16px; color: var(--text-secondary); margin-bottom: var(--space-xl); position: relative; }
.cta-form { display: flex; gap: var(--space-md); max-width: 480px; margin: 0 auto; position: relative; }
.cta-input {
  flex: 1; background: var(--bg-primary); border: 1px solid var(--border-light);
  border-radius: var(--radius-pill); padding: 14px 22px; color: var(--text-primary);
  font-size: 15px; outline: none; transition: border-color var(--transition-fast);
}
.cta-input::placeholder { color: var(--text-muted); }
.cta-input:focus { border-color: var(--accent-violet); box-shadow: 0 0 0 3px rgba(124,58,237,0.15); }

.cta-social-proof { display: flex; align-items: center; justify-content: center; gap: var(--space-md); margin-top: var(--space-xl); position: relative; }
.cta-avatars { display: flex; }
.cta-avatars span {
  width: 32px; height: 32px; border-radius: 50%; border: 2px solid var(--bg-card);
  margin-left: -8px; display: grid; place-items: center; font-size: 12px; font-weight: 600;
}
.cta-avatars span:nth-child(1) { background: linear-gradient(135deg, #7c3aed, #a78bfa); margin-left: 0; }
.cta-avatars span:nth-child(2) { background: linear-gradient(135deg, #06d6a0, #34d399); }
.cta-avatars span:nth-child(3) { background: linear-gradient(135deg, #f59e0b, #fbbf24); }
.cta-avatars span:nth-child(4) { background: linear-gradient(135deg, #f43f5e, #fb7185); }
.cta-proof-text { font-size: 14px; color: var(--text-secondary); }
.cta-proof-text strong { color: var(--text-primary); }

/* ========================================
   FOOTER
   ======================================== */

.landing-footer { padding: var(--space-3xl) 0 var(--space-xl); border-top: 1px solid var(--border-subtle); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--space-2xl); margin-bottom: var(--space-2xl); }
.footer-brand { max-width: 280px; }
.footer-brand .nav-logo { margin-bottom: var(--space-md); }
.footer-brand p { font-size: 14px; color: var(--text-muted); line-height: 1.7; }
.footer-col h4 { font-family: var(--font-heading); font-size: 14px; font-weight: 600; margin-bottom: var(--space-md); text-transform: uppercase; letter-spacing: 0.05em; }
.footer-col a { display: block; font-size: 14px; color: var(--text-muted); padding: 4px 0; transition: color var(--transition-fast); }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: var(--space-xl); border-top: 1px solid var(--border-subtle); font-size: 13px; color: var(--text-muted); }

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
  .hero-content { grid-template-columns: 1fr; text-align: center; gap: var(--space-2xl); }
  .hero-subtitle { margin: 0 auto var(--space-xl); }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { max-width: 600px; margin: 0 auto; }
  .hero-float-card.card-streak { right: -2%; top: 5%; }
  .hero-float-card.card-xp { left: -2%; bottom: 10%; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid::before { display: none; }
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .preview-sidebar { display: none; }
  .motion-signal { opacity: 0.4; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-actions .btn-ghost { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero-section { padding-top: 100px; }
  .hero-stats { gap: var(--space-lg); }
  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .preview-stats-row { flex-direction: column; }
  .preview-cards-row { flex-direction: column; }
  .cta-form { flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: var(--space-md); text-align: center; }
  .hero-float-card { display: none; }
  .motion-signal { display: none; }
}

@media (max-width: 480px) {
  :root { --space-lg: 16px; --space-xl: 24px; --space-2xl: 32px; --space-3xl: 48px; --space-4xl: 64px; }
  .hero-title { font-size: 36px; }
  .mockup-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; }
  .animate-on-scroll { opacity: 1; transform: none; }
  .motion-field, .motion-grid, .motion-spotlight, .motion-signal, .particles { display: none !important; }
  .hero-text, .hero-visual { transform: none !important; }
}