/* ===== CSS Custom Properties ===== */
:root {
  --color-bg: #05050a;
  --color-bg-elevated: #0a0a14;
  --color-surface: rgba(255, 255, 255, 0.03);
  --color-surface-hover: rgba(255, 255, 255, 0.06);
  --color-border: rgba(255, 255, 255, 0.06);
  --color-border-strong: rgba(255, 255, 255, 0.1);
  --color-text: #f1f1f7;
  --color-text-secondary: #8b8b9e;
  --color-text-tertiary: #52526b;
  --color-primary: #6366F1;
  --color-primary-soft: rgba(99, 102, 241, 0.12);
  --color-accent: #A855F7;
  --color-accent-soft: rgba(168, 85, 247, 0.1);
  --color-cyan: #22D3EE;
  --color-cyan-soft: rgba(34, 211, 238, 0.08);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', sans-serif;
  --font-display: 'Space Grotesk', 'Inter', sans-serif;

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

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.6);

  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out-quint: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);

  --glass-blur: blur(24px) saturate(180%);
  --glass-border: 1px solid rgba(255, 255, 255, 0.06);
}

[data-theme="light"] {
  --color-bg: #fafafa;
  --color-bg-elevated: #ffffff;
  --color-surface: rgba(0, 0, 0, 0.02);
  --color-surface-hover: rgba(0, 0, 0, 0.04);
  --color-border: rgba(0, 0, 0, 0.06);
  --color-border-strong: rgba(0, 0, 0, 0.1);
  --color-text: #0a0a14;
  --color-text-secondary: #52526b;
  --color-text-tertiary: #9d9db5;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.08);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.1);
  --glass-border: 1px solid rgba(0, 0, 0, 0.06);
}

/* ===== Reset & Base ===== */
*, *::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(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  transition: background 0.4s var(--ease-in-out), color 0.4s var(--ease-in-out);
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input { font-family: inherit; }

/* ===== Grain Texture ===== */
.grain {
  position: fixed;
  inset: 0;
  z-index: 10000;
  pointer-events: none;
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='grain'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23grain)'/%3E%3C/svg%3E");
  background-repeat: repeat;
  background-size: 256px 256px;
}

/* ===== Grid Background ===== */
.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.25;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 70% at 50% 0%, black 30%, transparent 70%);
}

[data-theme="light"] .grid-bg {
  opacity: 0.4;
  background-image:
    linear-gradient(rgba(0,0,0,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.04) 1px, transparent 1px);
}

/* ===== Ambient Orbs ===== */
.ambient-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  z-index: 0;
}

.orb-1 {
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.12), transparent 70%);
  top: -200px;
  left: -100px;
  animation: orbFloat1 20s ease-in-out infinite;
}

.orb-2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.1), transparent 70%);
  top: 50%;
  right: -150px;
  animation: orbFloat2 25s ease-in-out infinite;
}

.orb-3 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(34, 211, 238, 0.08), transparent 70%);
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  animation: orbFloat3 18s ease-in-out infinite;
}

@keyframes orbFloat1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(80px, 60px) scale(1.1); }
  66% { transform: translate(-40px, 100px) scale(0.9); }
}

@keyframes orbFloat2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-80px, -60px) scale(1.15); }
}

@keyframes orbFloat3 {
  0%, 100% { transform: translate(-50%, 0) scale(1); }
  50% { transform: translate(-50%, -80px) scale(1.2); }
}

/* ===== Layout ===== */
section {
  position: relative;
  z-index: 1;
}

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 12px 0;
  transition: all 0.3s var(--ease-in-out);
}

.navbar.scrolled {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
}

.navbar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 48px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  transition: opacity 0.2s;
}

.logo:hover { opacity: 0.8; }

.nav-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: color 0.2s;
  letter-spacing: -0.01em;
}

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

.theme-toggle {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all 0.2s;
}

.theme-toggle:hover {
  background: var(--color-surface);
  color: var(--color-text);
}

.theme-toggle .icon-moon { display: block; }
.theme-toggle .icon-sun { display: none; }

[data-theme="light"] .theme-toggle .icon-moon { display: none; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }

/* ===== Typography ===== */
h1, h2, h3, h4 { font-family: var(--font-display); letter-spacing: -0.03em; line-height: 1.1; }

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 50%, var(--color-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  transition: all 0.3s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover::after { opacity: 1; }
.btn-primary:active { transform: translateY(0); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--color-text-secondary);
  background: var(--color-surface);
  border: var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  transition: all 0.3s var(--ease-out-expo);
}

.btn-ghost:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
  transform: translateY(-2px);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 120px 32px 80px;
  text-align: center;
  position: relative;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-tertiary);
  margin-bottom: 32px;
  animation: fadeInUp 0.8s var(--ease-out-expo) both;
}

.eyebrow-line {
  width: 32px;
  height: 1px;
  background: var(--color-border-strong);
}

.hero-title {
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 800;
  margin-bottom: 28px;
  animation: fadeInUp 0.8s 0.1s var(--ease-out-expo) both;
}

.title-line {
  display: block;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
  animation: fadeInUp 0.8s 0.2s var(--ease-out-expo) both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 0.8s 0.3s var(--ease-out-expo) both;
}

/* Floating cards */
.hero-visual {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 1;
}

.float-card {
  position: absolute;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  animation: float 6s ease-in-out infinite;
}

.fc-icon {
  font-size: 1.2rem;
  opacity: 0.7;
}

.fc-1 { top: 18%; left: 8%; animation-delay: 0s; }
.fc-2 { top: 28%; right: 6%; animation-delay: -2s; }
.fc-3 { bottom: 22%; left: 12%; animation-delay: -4s; }
.fc-4 { bottom: 32%; right: 10%; animation-delay: -1.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-16px); }
}

/* ===== Section Headers ===== */
.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 700;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
}

/* ===== Features Bento ===== */
.features {
  padding: 100px 32px;
  max-width: 1280px;
  margin: 0 auto;
}

.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 240px;
  gap: 16px;
}

.bento-card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  border: var(--glass-border);
  transition: all 0.4s var(--ease-out-expo);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.bento-card:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-border-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.bento-card.tall { grid-row: span 2; }
.bento-card.wide { grid-column: span 2; }

.bento-glow {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s;
  background: radial-gradient(600px circle at var(--mouse-x, 50%) var(--mouse-y, 50%), rgba(99, 102, 241, 0.06), transparent 60%);
}

.bento-card:hover .bento-glow { opacity: 1; }

.bento-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.bento-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.bento-card p {
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
  position: relative;
  z-index: 1;
  flex: 1;
}

.bento-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  position: relative;
  z-index: 1;
  margin-top: 16px;
}

.bento-tags li {
  font-size: 0.75rem;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(255,255,255,0.04);
  color: var(--color-text-tertiary);
  border: 1px solid rgba(255,255,255,0.05);
}

[data-theme="light"] .bento-tags li {
  background: rgba(0,0,0,0.03);
  border-color: rgba(0,0,0,0.06);
}

/* ===== About ===== */
.about {
  padding: 100px 32px;
  max-width: 1280px;
  margin: 0 auto;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-text h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  font-weight: 700;
  margin-bottom: 24px;
  line-height: 1.15;
}

.about-text p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.8;
  margin-bottom: 40px;
}

.about-stats {
  display: flex;
  gap: 48px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--color-primary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.glass-panel {
  background: var(--color-surface);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: var(--radius-xl);
  padding: 4px;
  box-shadow: var(--shadow-xl);
}

.glass-panel-inner {
  background: var(--color-bg-elevated);
  border-radius: calc(var(--radius-xl) - 4px);
  padding: 32px;
}

.code-mock {
  font-family: 'SF Mono', 'Fira Code', 'Cascadia Code', monospace;
  font-size: 0.8rem;
  line-height: 2;
}

.code-dots {
  display: flex;
  gap: 8px;
  margin-bottom: 20px;
}

.code-dots span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.code-dots span:nth-child(1) { background: #FF5F57; }
.code-dots span:nth-child(2) { background: #FFBD2E; }
.code-dots span:nth-child(3) { background: #28CA41; }

.code-line { color: var(--color-text-secondary); }

.token-keyword { color: #C792EA; }
.token-fn { color: #82AAFF; }
.token-string { color: #C3E88D; }
.token-comment { color: #546E7A; font-style: italic; }

/* ===== CTA ===== */
.cta {
  padding: 80px 32px;
  max-width: 1280px;
  margin: 0 auto;
}

.cta-card {
  text-align: center;
  padding: 80px 48px;
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  border: var(--glass-border);
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(99, 102, 241, 0.06), transparent);
}

.cta-card h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
}

.cta-card p {
  color: var(--color-text-secondary);
  margin-bottom: 32px;
  position: relative;
}

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 420px;
  margin: 0 auto;
  position: relative;
}

.cta-form input {
  flex: 1;
  padding: 14px 20px;
  border-radius: 100px;
  background: var(--color-bg-elevated);
  border: var(--glass-border);
  color: var(--color-text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s;
}

.cta-form input:focus {
  border-color: var(--color-primary);
}

/* ===== Footer ===== */
.footer {
  border-top: var(--glass-border);
  margin-top: 40px;
  padding: 64px 32px 32px;
  position: relative;
  z-index: 1;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 64px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--color-text-tertiary);
  font-size: 0.9rem;
  margin-top: 12px;
  max-width: 240px;
}

.footer-links {
  display: flex;
  gap: 80px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-tertiary);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  margin-bottom: 10px;
  transition: color 0.2s;
}

.footer-col a:hover { color: var(--color-text); }

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  border-top: var(--glass-border);
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--color-text-tertiary);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%) translateY(120px);
  padding: 12px 24px;
  border-radius: 100px;
  background: var(--color-text);
  color: var(--color-bg);
  font-size: 0.85rem;
  font-weight: 500;
  z-index: 1000;
  transition: transform 0.4s var(--ease-out-quint);
  pointer-events: none;
}

.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== Animations ===== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-out-expo), transform 0.8s var(--ease-out-expo);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 220px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 40px;
  }

  .footer-links {
    gap: 48px;
  }

  .float-card { display: none; }
}

@media (max-width: 640px) {
  .navbar-inner { padding: 0 16px; }
  .nav-link { display: none; }

  .hero { padding: 100px 16px 60px; }
  .hero-title { font-size: 2.5rem; }

  .bento-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }

  .bento-card.tall { grid-row: auto; }
  .bento-card.wide { grid-column: auto; }

  .features { padding: 60px 16px; }
  .about { padding: 60px 16px; }
  .cta { padding: 60px 16px; }
  .cta-card { padding: 48px 24px; }

  .cta-form {
    flex-direction: column;
  }

  .about-stats {
    gap: 32px;
    flex-wrap: wrap;
  }

  .footer-inner {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    flex-direction: column;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .section-title { font-size: 2rem; }
}