:root {
  --bg: #0a0a0c;
  --bg-elevated: #111114;
  --bg-card: #16161a;
  --fg: #e8e6e3;
  --fg-muted: #8a8a8e;
  --fg-dim: #5a5a5e;
  --accent: #00e599;
  --accent-glow: rgba(0, 229, 153, 0.15);
  --accent-dim: #00b377;
  --border: #2a2a2e;
  --radius: 12px;
  --font-heading: 'Space Grotesk', sans-serif;
  --font-mono: 'IBM Plex Mono', monospace;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-heading);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ═══ HERO ═══ */
.hero {
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 24px 80px;
  position: relative;
  overflow: hidden;
  background: radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow) 0%, transparent 60%);
}

.hero-container {
  max-width: 800px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  border: 1px solid var(--accent-dim);
  padding: 6px 16px;
  border-radius: 100px;
  margin-bottom: 32px;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 48px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-family: var(--font-mono);
  font-size: 1.8rem;
  font-weight: 500;
  color: var(--accent);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-top: 4px;
}

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

/* ═══ PROBLEM ═══ */
.problem {
  padding: 100px 24px;
  background: var(--bg);
}

.problem-container {
  max-width: 900px;
  margin: 0 auto;
}

.problem-label,
.features-label,
.comparison-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 16px;
}

.problem h2,
.features h2,
.comparison h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 48px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.problem-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: border-color 0.2s;
}

.problem-card:hover {
  border-color: var(--fg-dim);
}

.problem-icon {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.problem-text {
  font-size: 0.95rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ═══ FEATURES ═══ */
.features {
  padding: 100px 24px;
  background: var(--bg-elevated);
}

.features-container {
  max-width: 1000px;
  margin: 0 auto;
}

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

.feature {
  padding: 32px;
  border-left: 2px solid var(--border);
  transition: border-color 0.2s;
}

.feature:hover {
  border-left-color: var(--accent);
}

.feature-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-dim);
  margin-bottom: 12px;
}

.feature h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature p {
  font-size: 0.9rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ═══ COMPARISON ═══ */
.comparison {
  padding: 100px 24px;
  background: var(--bg);
}

.comparison-container {
  max-width: 800px;
  margin: 0 auto;
}

.comparison-table {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.comp-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr 1.2fr;
  border-bottom: 1px solid var(--border);
}

.comp-row:last-child {
  border-bottom: none;
}

.comp-row > div {
  padding: 16px 20px;
  font-size: 0.9rem;
}

.comp-header {
  background: var(--bg-card);
}

.comp-header > div {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--fg-dim);
}

.comp-task {
  font-weight: 600;
  color: var(--fg);
}

.comp-old {
  color: var(--fg-dim);
  border-left: 1px solid var(--border);
}

.comp-new {
  color: var(--accent);
  font-weight: 500;
  border-left: 1px solid var(--border);
  background: rgba(0, 229, 153, 0.03);
}

/* ═══ CLOSING ═══ */
.closing {
  padding: 120px 24px;
  text-align: center;
  background: var(--bg-elevated);
  position: relative;
  overflow: hidden;
}

.closing::before {
  content: '';
  position: absolute;
  bottom: -50%;
  left: 50%;
  transform: translateX(-50%);
  width: 120%;
  height: 100%;
  background: radial-gradient(ellipse at center, var(--accent-glow) 0%, transparent 60%);
  pointer-events: none;
}

.closing-container {
  max-width: 700px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.closing h2 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.closing-text {
  font-size: 1.2rem;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 32px;
}

.closing-vision {
  font-size: 1rem;
  color: var(--fg-muted);
  line-height: 1.7;
  max-width: 550px;
  margin: 0 auto;
}

/* ═══ FOOTER ═══ */
.footer {
  padding: 48px 24px;
  text-align: center;
  background: var(--bg);
  border-top: 1px solid var(--border);
}

.footer-container {
  max-width: 600px;
  margin: 0 auto;
}

.footer-brand {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 8px;
}

.footer-tagline {
  font-size: 0.85rem;
  color: var(--fg-dim);
  margin-bottom: 16px;
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--fg-dim);
}

/* ═══ RESPONSIVE ═══ */
@media (max-width: 768px) {
  .problem-grid {
    grid-template-columns: 1fr;
  }

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

  .feature {
    border-left: none;
    border-top: 2px solid var(--border);
    padding: 24px 0;
  }

  .feature:hover {
    border-left-color: transparent;
    border-top-color: var(--accent);
  }

  .comp-row {
    grid-template-columns: 1fr;
  }

  .comp-header {
    display: none;
  }

  .comp-row > div {
    border-left: none !important;
    padding: 10px 16px;
  }

  .comp-task {
    padding-top: 16px !important;
    font-size: 0.85rem;
  }

  .comp-old::before {
    content: 'Traditional: ';
    font-weight: 600;
    color: var(--fg-dim);
  }

  .comp-new::before {
    content: 'DeskPilot: ';
    font-weight: 600;
  }

  .hero-stats {
    gap: 20px;
  }

  .stat-divider {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 80px 20px 60px;
  }
}