:root {
  --bg-primary: #0a0e17;
  --bg-secondary: #111827;
  --bg-card: #151c2c;
  --text-primary: #e8ecf4;
  --text-secondary: #8892a8;
  --accent: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.15);
  --accent-warm: #ff6b35;
  --border: rgba(136, 146, 168, 0.12);
  --font-body: 'Space Grotesk', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ===== HERO ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 48px 80px;
  overflow: hidden;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 50% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 50% at 50% 40%, black 20%, transparent 70%);
  opacity: 0.5;
}

.hero-content {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  z-index: 1;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 32px;
  padding: 6px 16px;
  background: var(--accent-glow);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 100px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.4); }
  50% { opacity: 0.7; box-shadow: 0 0 0 8px rgba(0, 212, 255, 0); }
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 28px;
}

.highlight {
  color: var(--accent);
  position: relative;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.7;
  margin-bottom: 48px;
}

.hero-stat-row {
  display: flex;
  align-items: center;
  gap: 32px;
  padding: 28px 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  width: fit-content;
}

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

.stat-number {
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

/* ===== PROBLEM ===== */
.problem {
  padding: 120px 48px;
  background: var(--bg-secondary);
}

.problem-content {
  max-width: 1100px;
  margin: 0 auto;
}

.problem-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent-warm);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 24px;
}

.problem h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 600;
  line-height: 1.35;
  max-width: 800px;
  margin-bottom: 64px;
  letter-spacing: -0.5px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.problem-card {
  padding: 36px 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  transition: border-color 0.3s ease;
}

.problem-card:hover {
  border-color: rgba(0, 212, 255, 0.3);
}

.problem-icon {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 20px;
  opacity: 0.6;
}

.problem-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.problem-card p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* ===== FEATURES ===== */
.features {
  padding: 120px 48px;
}

.features-content {
  max-width: 1100px;
  margin: 0 auto;
}

.features-label {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 3px;
  margin-bottom: 64px;
}

.feature-blocks {
  display: flex;
  flex-direction: column;
  gap: 80px;
}

.feature-block {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.feature-block.reverse {
  grid-template-columns: 1fr 1.1fr;
}

.feature-terminal {
  background: #0d1117;
  border: 1px solid rgba(136, 146, 168, 0.15);
  border-radius: 10px;
  overflow: hidden;
}

.terminal-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.03);
  border-bottom: 1px solid rgba(136, 146, 168, 0.1);
}

.terminal-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.terminal-dot.red { background: #ff5f56; }
.terminal-dot.yellow { background: #ffbd2e; }
.terminal-dot.green { background: #27c93f; }

.terminal-title {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-secondary);
  margin-left: 8px;
}

.terminal-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.terminal-body code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-secondary);
  display: block;
}

.code-comment { color: #546e7a; }
.code-key { color: var(--accent); }
.code-success { color: #27c93f; }

.feature-text h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}

.feature-text p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== CLOSING ===== */
.closing {
  padding: 140px 48px;
  background: var(--bg-secondary);
  text-align: center;
}

.closing-content {
  max-width: 780px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 28px;
  letter-spacing: -0.5px;
}

.closing-text {
  font-size: 1.1rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 48px;
  border-top: 1px solid var(--border);
}

.footer-content {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-weight: 700;
  font-size: 1.1rem;
  letter-spacing: -0.5px;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero {
    padding: 100px 24px 60px;
    min-height: auto;
  }

  .hero-stat-row {
    flex-direction: column;
    gap: 20px;
    width: 100%;
    text-align: center;
  }

  .stat-divider {
    width: 60px;
    height: 1px;
  }

  .problem {
    padding: 80px 24px;
  }

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

  .features {
    padding: 80px 24px;
  }

  .feature-block,
  .feature-block.reverse {
    grid-template-columns: 1fr;
  }

  .feature-block.reverse .feature-text {
    order: -1;
  }

  .closing {
    padding: 80px 24px;
  }

  .site-footer {
    padding: 32px 24px;
  }

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

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero-tag {
    font-size: 11px;
  }

  .terminal-body code {
    font-size: 11px;
  }
}