/* ============================================
   Mass Tech Evolution — Main Stylesheet
   ============================================ */

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

/* --- Reset & Base --- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --bg-primary: #0a0a0f;
  --bg-secondary: #111118;
  --bg-tertiary: #16161f;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --glass: rgba(255,255,255,0.05);
  --glass-border: rgba(255,255,255,0.08);
  --glass-border-hover: rgba(255,255,255,0.15);

  --text-primary: #f0f0f5;
  --text-secondary: #8888a0;
  --text-tertiary: #55556a;
  --text-accent: #a78bfa;

  --accent-primary: #8b5cf6;
  --accent-secondary: #6366f1;
  --accent-tertiary: #a78bfa;
  --accent-pink: #ec4899;
  --accent-cyan: #06b6d4;
  --accent-green: #10b981;
  --accent-amber: #f59e0b;
  --accent-rose: #f472b6;

  --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a78bfa 100%);
  --gradient-hero: linear-gradient(135deg, #0a0a1a 0%, #1a0a2e 25%, #0a1a2e 50%, #0a0a1a 100%);
  --gradient-card: linear-gradient(135deg, rgba(99,102,241,0.1) 0%, rgba(139,92,246,0.05) 100%);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(139,92,246,0.15);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --nav-height: 64px;
  --container-max: 1200px;
  --container-wide: 1400px;
}

html {
  font-size: 16px;
  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;
}

a { color: var(--accent-tertiary); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--text-primary); }

::selection { background: rgba(139,92,246,0.3); color: #fff; }
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--bg-tertiary); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-tertiary); }

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(10,10,15,0.8);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: all 0.3s ease;
}
.nav.scrolled { background: rgba(10,10,15,0.95); box-shadow: var(--shadow-md); }
.nav-inner {
  max-width: var(--container-wide);
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text-primary);
}
.nav-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--gradient-primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  padding: 6px 4px 4px;
}
.nav-logo-icon svg {
  width: 100%;
  height: 100%;
  fill: currentColor;
}
.nav-links { display: flex; gap: 4px; align-items: center; }
.nav-link {
  padding: 8px 16px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
  position: relative;
}
.nav-link:hover { color: var(--text-primary); background: var(--glass); }
.nav-link.active {
  color: var(--text-primary);
  background: rgba(139,92,246,0.1);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 16px;
  right: 16px;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
}

/* Mobile nav */
.nav-toggle { display: none; background: none; border: none; color: var(--text-primary); cursor: pointer; padding: 8px; }
.nav-toggle svg { width: 24px; height: 24px; }

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10,10,15,0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: all; }
  .nav-link { width: 100%; padding: 12px 16px; }
}

/* --- Container --- */
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 32px; }
.container-wide { max-width: var(--container-wide); margin: 0 auto; padding: 0 32px; }

/* --- Section --- */
.section {
  padding: 100px 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 64px;
}
.section-label {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent-primary);
  padding: 6px 14px;
  border: 1px solid rgba(139,92,246,0.3);
  border-radius: 100px;
  margin-bottom: 20px;
}
.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* --- Glass Card --- */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(139,92,246,0.3), transparent);
  opacity: 0;
  transition: opacity 0.3s;
}
.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--glass-border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.glass-card:hover::before { opacity: 1; }

/* --- Stat Cards --- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}
.stat-card {
  text-align: center;
  padding: 32px 24px;
}
.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 8px;
  font-weight: 500;
}

/* --- Hero --- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: var(--nav-height);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
  z-index: 0;
}
.hero-gradient {
  position: absolute;
  width: 800px;
  height: 800px;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.15;
  animation: float 20s ease-in-out infinite;
}
.hero-gradient-1 {
  background: var(--accent-primary);
  top: -200px;
  right: -200px;
  animation-delay: 0s;
}
.hero-gradient-2 {
  background: var(--accent-pink);
  bottom: -300px;
  left: -200px;
  animation-delay: -7s;
}
.hero-gradient-3 {
  background: var(--accent-cyan);
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  width: 600px;
  height: 600px;
  opacity: 0.08;
  animation-delay: -14s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.05); }
  66% { transform: translate(-20px, 20px) scale(0.95); }
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  padding: 0 32px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent-tertiary);
  padding: 8px 20px;
  border: 1px solid rgba(139,92,246,0.25);
  border-radius: 100px;
  margin-bottom: 32px;
  background: rgba(139,92,246,0.05);
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--accent-green);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}
.hero-title {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin-bottom: 24px;
}
.hero-title-gradient {
  background: linear-gradient(135deg, #fff 0%, #c4b5fd 40%, #8b5cf6 70%, #6366f1 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-description {
  font-size: 1.2rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto 48px;
  line-height: 1.7;
}
.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  font-family: var(--font-sans);
}
.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: 0 4px 20px rgba(139,92,246,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(139,92,246,0.4);
  color: #fff;
}
.btn-secondary {
  background: var(--glass);
  border: 1px solid var(--glass-border);
  color: var(--text-primary);
}
.btn-secondary:hover {
  background: var(--bg-card-hover);
  border-color: var(--glass-border-hover);
  color: var(--text-primary);
}

/* --- Grid particles BG --- */
.grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  z-index: 0;
}

/* --- Scroll animations --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }
.fade-in-delay-5 { transition-delay: 0.5s; }

/* --- Footer --- */
.footer {
  padding: 48px 0;
  border-top: 1px solid var(--glass-border);
  text-align: center;
}
.footer-text {
  color: var(--text-tertiary);
  font-size: 0.85rem;
}
.footer-text a { color: var(--text-secondary); }

/* --- Divider --- */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
  margin: 0;
}

/* --- Page wrapper --- */
.page-content {
  padding-top: calc(var(--nav-height) + 48px);
  min-height: 100vh;
}

/* --- Mono text --- */
.mono { font-family: var(--font-mono); }

/* --- Badges --- */
.badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  letter-spacing: 0.05em;
}
.badge-purple { background: rgba(139,92,246,0.15); color: #a78bfa; border: 1px solid rgba(139,92,246,0.2); }
.badge-blue { background: rgba(99,102,241,0.15); color: #818cf8; border: 1px solid rgba(99,102,241,0.2); }
.badge-pink { background: rgba(236,72,153,0.15); color: #f472b6; border: 1px solid rgba(236,72,153,0.2); }
.badge-green { background: rgba(16,185,129,0.15); color: #34d399; border: 1px solid rgba(16,185,129,0.2); }
.badge-amber { background: rgba(245,158,11,0.15); color: #fbbf24; border: 1px solid rgba(245,158,11,0.2); }
.badge-cyan { background: rgba(6,182,212,0.15); color: #22d3ee; border: 1px solid rgba(6,182,212,0.2); }
.badge-gray { background: rgba(100,116,139,0.15); color: #94a3b8; border: 1px solid rgba(100,116,139,0.2); }
.badge-rose { background: rgba(244,114,182,0.15); color: #fb7185; border: 1px solid rgba(244,114,182,0.2); }