/* ═══════════════════════════════════════════════════════════════
   Fng Design System — Liquid Glass · Motion · Brand
   ═══════════════════════════════════════════════════════════════ */

/* ── CSS Custom Properties ─────────────────────────────────── */
:root {
  /* Brand Colors (HSL) */
  --color-primary: 239 84% 67%;       /* Indigo #6366f1 */
  --color-secondary: 262 83% 66%;     /* Violet #8b5cf6 */
  --color-accent: 189 94% 43%;        /* Cyan #06b6d4 */
  --color-rose: 350 89% 60%;
  --color-emerald: 160 84% 45%;
  --color-amber: 38 92% 55%;

  /* Light Mode Surfaces */
  --bg-base: 240 20% 98%;
  --bg-surface: 0 0% 100%;
  --bg-elevated: 0 0% 100%;
  --border-color: 240 10% 90%;
  --text-primary: 240 10% 10%;
  --text-secondary: 240 5% 40%;
  --text-tertiary: 240 5% 55%;

  /* Glass */
  --glass-bg: rgba(255,255,255,0.55);
  --glass-bg-lg: rgba(255,255,255,0.65);
  --glass-bg-xl: rgba(255,255,255,0.75);
  --glass-border: rgba(0,0,0,0.06);
  --glass-border-lg: rgba(0,0,0,0.08);
  --glass-blur: 20px;
  --glass-blur-lg: 40px;
  --glass-blur-xl: 60px;
  --glass-saturate: 1.2;
  --glass-brightness: 1.05;

  /* Spacing */
  --nav-height: 72px;
  --content-max: 1280px;
  --section-gap: 6rem;

  /* Radius */
  --radius-sm: 0.75rem;
  --radius: 1rem;
  --radius-lg: 1.5rem;
  --radius-xl: 2rem;
  --radius-2xl: 2.5rem;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 16px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.08);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 0 1px rgba(99,102,241,0.1), 0 0 60px -10px rgba(99,102,241,0.15);
  --shadow-glow-lg: 0 0 0 1px rgba(99,102,241,0.15), 0 0 100px -10px rgba(99,102,241,0.25);

  /* Typography */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
  --font-display: var(--font-sans);
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-extrabold: 800;
  --font-weight-black: 900;

  /* Animation */
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;
  --duration-glacial: 1000ms;
}

/* Dark Mode */
.dark {
  --bg-base: 240 20% 4%;
  --bg-surface: 240 15% 7%;
  --bg-elevated: 240 12% 10%;
  --border-color: 240 10% 15%;
  --text-primary: 0 0% 95%;
  --text-secondary: 240 5% 65%;
  --text-tertiary: 240 5% 45%;

  --glass-bg: rgba(255,255,255,0.04);
  --glass-bg-lg: rgba(255,255,255,0.06);
  --glass-bg-xl: rgba(255,255,255,0.08);
  --glass-border: rgba(255,255,255,0.06);
  --glass-border-lg: rgba(255,255,255,0.08);
  --glass-saturate: 1.4;
  --glass-brightness: 1.02;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.2);
  --shadow: 0 4px 16px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.4);
  --shadow-xl: 0 24px 64px rgba(0,0,0,0.5);
}

/* ── 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;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  background: hsl(var(--bg-base));
  color: hsl(var(--text-primary));
  line-height: 1.6;
  transition: background-color var(--duration-slow) var(--ease-out),
              color var(--duration-slow) var(--ease-out);
  overflow-x: hidden;
  min-height: 100vh;
}

::selection {
  background: hsla(var(--color-primary) / 0.2);
  color: hsl(var(--color-primary));
}

/* ── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: hsla(var(--color-primary) / 0.3);
  border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
  background: hsla(var(--color-primary) / 0.5);
}

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

.text-gradient {
  background: linear-gradient(135deg,
    hsl(var(--color-primary)) 0%,
    hsl(var(--color-secondary)) 40%,
    hsl(var(--color-accent)) 100%);
  background-size: 200% 200%;
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: gradientShift 8s ease infinite;
}

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

/* ── Liquid Glass System (5 tiers) ─────────────────────────── */
.glass-xs {
  background: var(--glass-bg);
  backdrop-filter: blur(8px) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  -webkit-backdrop-filter: blur(8px) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
}
.glass {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.glass::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(255,255,255,0.08) 0%,
    rgba(255,255,255,0.02) 50%,
    rgba(255,255,255,0) 100%);
  pointer-events: none;
  z-index: 1;
}
.glass::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom,
    rgba(255,255,255,0.03) 0%,
    transparent 40%);
  pointer-events: none;
  z-index: 2;
}
.glass-lg {
  position: relative;
  background: var(--glass-bg-lg);
  backdrop-filter: blur(var(--glass-blur-lg)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  -webkit-backdrop-filter: blur(var(--glass-blur-lg)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  border: 1px solid var(--glass-border-lg);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.glass-lg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(255,255,255,0.12) 0%,
    rgba(255,255,255,0.03) 40%,
    rgba(255,255,255,0) 70%,
    rgba(255,255,255,0.02) 100%);
  pointer-events: none;
  z-index: 1;
}
.glass-xl {
  background: var(--glass-bg-xl);
  backdrop-filter: blur(var(--glass-blur-xl)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  -webkit-backdrop-filter: blur(var(--glass-blur-xl)) saturate(var(--glass-saturate)) brightness(var(--glass-brightness));
  border: 1px solid var(--glass-border-lg);
  border-radius: var(--radius-2xl);
}
.glass-glow {
  position: relative;
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border-radius: var(--radius-lg);
  overflow: visible;
}
.glass-glow::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg,
    hsl(var(--color-primary)),
    hsl(var(--color-secondary)),
    hsl(var(--color-accent)),
    hsl(var(--color-primary)));
  background-size: 300% 300%;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  animation: borderGlow 4s ease infinite;
  z-index: 0;
}

/* ── Card Component ────────────────────────────────────────── */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(var(--glass-saturate));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--duration-slow) var(--ease-smooth);
  overflow: hidden;
  position: relative;
}
.card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg,
    rgba(255,255,255,0.06) 0%,
    rgba(255,255,255,0.01) 50%,
    rgba(255,255,255,0) 100%);
  pointer-events: none;
  z-index: 1;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px -10px hsla(var(--color-primary) / 0.15);
  border-color: hsla(var(--color-primary) / 0.3);
}
.card:active {
  transform: translateY(-3px) scale(0.995);
}

/* ── Glow Rings ────────────────────────────────────────────── */
.glow-ring {
  box-shadow: var(--shadow-glow);
}
.glow-ring-lg {
  box-shadow: var(--shadow-glow-lg);
}

/* ── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-sans);
  font-weight: var(--font-weight-semibold);
  font-size: 0.875rem;
  line-height: 1;
  border-radius: var(--radius-full);
  padding: 0.75rem 2rem;
  cursor: pointer;
  transition: all var(--duration-normal) var(--ease-out);
  border: none;
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}
.btn:active { transform: scale(0.96); }

.btn-primary {
  background: linear-gradient(135deg,
    hsl(var(--color-primary)),
    hsl(var(--color-secondary)));
  color: #fff;
  box-shadow: 0 4px 20px -4px hsla(var(--color-primary) / 0.4);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px -4px hsla(var(--color-primary) / 0.5);
}
.btn-primary:active { transform: scale(0.96) translateY(0); }

.btn-ghost {
  background: transparent;
  color: hsl(var(--text-secondary));
  border: 1px solid var(--glass-border);
}
.btn-ghost:hover {
  color: hsl(var(--text-primary));
  border-color: hsla(var(--color-primary) / 0.4);
  background: hsla(var(--color-primary) / 0.05);
}

.btn-glass {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: hsl(var(--text-primary));
  border: 1px solid var(--glass-border);
}
.btn-glass:hover {
  border-color: hsla(var(--color-primary) / 0.3);
  box-shadow: 0 8px 32px -8px hsla(var(--color-primary) / 0.2);
  transform: translateY(-2px);
}

.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.8125rem; }
.btn-lg { padding: 1rem 2.5rem; font-size: 1rem; }
.btn-icon { width: 2.5rem; height: 2.5rem; padding: 0; border-radius: var(--radius); }

/* ── Navigation ────────────────────────────────────────────── */
.nav-container {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 1.5rem;
  transition: all var(--duration-slow) var(--ease-out);
}
.nav-container.scrolled {
  background: var(--glass-bg-lg);
  backdrop-filter: blur(var(--glass-blur-lg)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur-lg)) saturate(var(--glass-saturate));
  border-bottom: 1px solid var(--glass-border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: var(--font-weight-black);
  letter-spacing: -0.04em;
  text-decoration: none;
  transition: opacity var(--duration-fast);
}
.nav-logo:hover { opacity: 0.85; }
.nav-links {
  display: none;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  padding: 0.5rem 1rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: hsl(var(--text-secondary));
  text-decoration: none;
  transition: all var(--duration-fast);
}
.nav-link:hover { color: hsl(var(--text-primary)); background: hsla(var(--color-primary) / 0.06); }
.nav-link.active { color: hsl(var(--color-primary)); background: hsla(var(--color-primary) / 0.1); }
.nav-link-cta {
  padding: 0.5rem 1.25rem;
  margin-left: 0.5rem;
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: #fff;
  background: linear-gradient(135deg, hsl(var(--color-primary)), hsl(var(--color-secondary)));
  text-decoration: none;
  transition: all var(--duration-fast);
  box-shadow: 0 2px 12px -2px hsla(var(--color-primary) / 0.3);
}
.nav-link-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px -4px hsla(var(--color-primary) / 0.4);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.nav-icon-btn {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: hsl(var(--text-secondary));
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.05em;
  transition: all var(--duration-fast);
}
.nav-icon-btn:hover {
  background: hsla(var(--color-primary) / 0.06);
  color: hsl(var(--text-primary));
}
.nav-menu-btn {
  display: flex;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: var(--radius);
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: hsl(var(--text-primary));
  cursor: pointer;
  font-size: 1.25rem;
  transition: all var(--duration-fast);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 99;
  padding: calc(var(--nav-height) + 1rem) 1.5rem 2rem;
  background: var(--glass-bg-xl);
  backdrop-filter: blur(var(--glass-blur-xl)) saturate(var(--glass-saturate));
  -webkit-backdrop-filter: blur(var(--glass-blur-xl)) saturate(var(--glass-saturate));
}
.mobile-menu.open { display: flex; flex-direction: column; gap: 0.5rem; }
.mobile-menu a {
  display: block;
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  color: hsl(var(--text-primary));
  text-decoration: none;
  transition: background var(--duration-fast);
}
.mobile-menu a:hover { background: hsla(var(--color-primary) / 0.08); }
.mobile-menu a.active {
  color: hsl(var(--color-primary));
  background: hsla(var(--color-primary) / 0.1);
}

/* ── Footer ────────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--glass-border);
  padding: 3rem 1.5rem;
  margin-top: var(--section-gap);
}
.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}
.footer-brand {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
}
.footer-tagline {
  font-size: 0.75rem;
  color: hsl(var(--text-tertiary));
  margin-top: 0.25rem;
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
}
.footer-links a {
  font-size: 0.8125rem;
  color: hsl(var(--text-tertiary));
  text-decoration: none;
  transition: color var(--duration-fast);
}
.footer-links a:hover { color: hsl(var(--color-primary)); }
.footer-copy {
  font-size: 0.75rem;
  color: hsl(var(--text-tertiary));
}

/* ── Hero / Background Effects ─────────────────────────────── */
.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  pointer-events: none;
  will-change: transform;
}
.hero-glow-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, hsla(var(--color-primary) / 0.3), transparent);
  animation: morphBlob 12s ease-in-out infinite, floatSlow 20s ease-in-out infinite;
}
.hero-glow-2 {
  width: 500px; height: 500px;
  background: radial-gradient(circle, hsla(var(--color-secondary) / 0.25), transparent);
  animation: morphBlob 10s ease-in-out infinite reverse, floatSlow 16s ease-in-out infinite;
  animation-delay: -3s;
}
.hero-glow-3 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, hsla(var(--color-accent) / 0.2), transparent);
  animation: morphBlob 14s ease-in-out infinite, floatSlow 18s ease-in-out infinite;
  animation-delay: -7s;
}
.hero-glow-4 {
  width: 350px; height: 350px;
  background: radial-gradient(circle, hsla(var(--color-rose) / 0.15), transparent);
  animation: morphBlob 11s ease-in-out infinite reverse, floatSlow 22s ease-in-out infinite;
  animation-delay: -5s;
}
.hero-glow-5 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, hsla(var(--color-emerald) / 0.15), transparent);
  animation: morphBlob 13s ease-in-out infinite, floatSlow 19s ease-in-out infinite;
  animation-delay: -9s;
}

/* Grid overlay */
.bg-grid {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image:
    linear-gradient(hsl(var(--color-primary)) 1px, transparent 1px),
    linear-gradient(90deg, hsl(var(--color-primary)) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.dark .bg-grid { opacity: 0.04; }

/* Noise texture overlay */
.bg-noise {
  position: absolute;
  inset: 0;
  opacity: 0.015;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  background-size: 256px 256px;
}

/* Cursor glow */
#cursor-glow {
  position: fixed;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, hsla(var(--color-primary) / 0.08), transparent 70%);
  pointer-events: none;
  z-index: 0;
  transform: translate(-50%, -50%);
  transition: opacity var(--duration-slow);
  will-change: transform;
  opacity: 0;
}

/* ── Stagger Animation Delays ──────────────────────────────── */
.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }
.stagger-4 { animation-delay: 0.4s; }
.stagger-5 { animation-delay: 0.5s; }
.stagger-6 { animation-delay: 0.6s; }

/* ── Keyframes ─────────────────────────────────────────────── */
@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes borderGlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes morphBlob {
  0%, 100% {
    border-radius: 60% 40% 30% 70% / 60% 30% 70% 40%;
    transform: scale(1);
  }
  25% {
    border-radius: 30% 60% 70% 40% / 50% 60% 30% 60%;
  }
  50% {
    border-radius: 40% 60% 30% 60% / 40% 70% 60% 30%;
    transform: scale(1.15);
  }
  75% {
    border-radius: 60% 30% 70% 40% / 30% 60% 40% 70%;
  }
}

@keyframes floatSlow {
  0%, 100% { transform: translate(0, 0); }
  25% { transform: translate(5%, -8%); }
  50% { transform: translate(-3%, 5%); }
  75% { transform: translate(-8%, -3%); }
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(60px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-30px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes numberPop {
  0% { transform: scale(1); }
  50% { transform: scale(1.3); color: hsl(var(--color-primary)); }
  100% { transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.3; box-shadow: 0 0 60px hsla(var(--color-primary) / 0.1); }
  50% { opacity: 0.6; box-shadow: 0 0 120px hsla(var(--color-primary) / 0.2); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

/* ── Animation Utility Classes ─────────────────────────────── */
.animate-fade-up {
  opacity: 0;
  animation: fadeUp 0.7s var(--ease-out) forwards;
}
.animate-fade-in {
  opacity: 0;
  animation: fadeIn 0.5s var(--ease-out) forwards;
}
.animate-scale-in {
  opacity: 0;
  animation: scaleIn 0.5s var(--ease-out) forwards;
}
.animate-slide-up {
  opacity: 0;
  animation: slideUp 0.8s var(--ease-out) forwards;
}
.animate-float {
  animation: floatY 4s var(--ease-in-out) infinite;
}
.animate-pulse-glow {
  animation: pulseGlow 3s var(--ease-in-out) infinite;
}

/* ── Layout Utilities ──────────────────────────────────────── */
.content-container {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section {
  padding: var(--section-gap) 1.5rem;
  position: relative;
}
.page-main {
  padding-top: calc(var(--nav-height) + 2rem);
  min-height: 100vh;
}

/* ── Form Elements ─────────────────────────────────────────── */
.glass-input {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 0.75rem 1.25rem;
  font-size: 0.9375rem;
  color: hsl(var(--text-primary));
  outline: none;
  transition: all var(--duration-normal);
  font-family: var(--font-sans);
}
.glass-input::placeholder { color: hsl(var(--text-tertiary)); }
.glass-input:focus {
  border-color: hsla(var(--color-primary) / 0.4);
  box-shadow: 0 0 0 3px hsla(var(--color-primary) / 0.1);
  background: var(--glass-bg-lg);
}

.glass-select {
  appearance: none;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 0.75rem 2.5rem 0.75rem 1.25rem;
  font-size: 0.875rem;
  color: hsl(var(--text-primary));
  cursor: pointer;
  outline: none;
  font-family: var(--font-sans);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236366f1' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1.2em;
}

/* ── Icon Container ────────────────────────────────────────── */
.icon-box {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  transition: transform var(--duration-normal) var(--ease-spring);
}
.icon-box-indigo { background: hsla(var(--color-primary) / 0.1); color: hsl(var(--color-primary)); }
.icon-box-violet { background: hsla(var(--color-secondary) / 0.1); color: hsl(var(--color-secondary)); }
.icon-box-cyan { background: hsla(var(--color-accent) / 0.1); color: hsl(var(--color-accent)); }
.icon-box-rose { background: hsla(var(--color-rose) / 0.1); color: hsl(var(--color-rose)); }
.icon-box-emerald { background: hsla(var(--color-emerald) / 0.1); color: hsl(var(--color-emerald)); }
.icon-box-amber { background: hsla(var(--color-amber) / 0.1); color: hsl(var(--color-amber)); }

/* ── Overlay / Modal ───────────────────────────────────────── */
.overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background: rgba(0,0,0,0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* ── Typewriter Cursor ─────────────────────────────────────── */
.type-cursor::after {
  content: '|';
  color: hsl(var(--color-primary));
  animation: blink 0.8s step-end infinite;
  font-weight: 200;
  margin-left: 0.125em;
}

/* ── Section Header ────────────────────────────────────────── */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--font-weight-bold);
  margin-bottom: 0.75rem;
}
.section-header p {
  font-size: 1.0625rem;
  color: hsl(var(--text-secondary));
  max-width: 32rem;
  margin: 0 auto;
}

/* ── Badge ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: var(--font-weight-medium);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border);
  color: hsl(var(--color-primary));
}
.badge-dot {
  width: 0.375rem;
  height: 0.375rem;
  border-radius: 50%;
  background: hsl(var(--color-primary));
  animation: pulse 2s ease-in-out infinite;
}

/* ── Scroll Indicator ──────────────────────────────────────── */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  opacity: 0.5;
}
.scroll-indicator .mouse {
  width: 1.5rem;
  height: 2.5rem;
  border-radius: var(--radius-full);
  border: 2px solid hsl(var(--text-tertiary));
  display: flex;
  justify-content: center;
  padding-top: 0.5rem;
}
.scroll-indicator .mouse-dot {
  width: 0.25rem;
  height: 0.5rem;
  border-radius: var(--radius-full);
  background: hsl(var(--text-tertiary));
  animation: bounce 2s var(--ease-in-out) infinite;
}

/* ── Responsive ────────────────────────────────────────────── */
@media (min-width: 768px) {
  .nav-links { display: flex; }
  .nav-menu-btn { display: none; }
  .footer-inner { flex-direction: row; justify-content: space-between; text-align: left; }
  :root { --section-gap: 8rem; }
}

@media (max-width: 767px) {
  .glass,
  .glass-lg,
  .glass-xl {
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
  }
  #cursor-glow { display: none !important; }
  :root { --section-gap: 4rem; }
}