:root {
  --bg: #0a0a0a;
  --bg-elevated: #111111;
  --bg-card: #161616;
  --fg: #fafafa;
  --fg-muted: #888888;
  --fg-subtle: #555555;
  --accent: #E8E4DF;
  --accent-warm: #C4BEB7;
  --border: #222222;
  --border-light: #1a1a1a;
  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-w: 1120px;
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 2rem;
  --space-lg: 4rem;
  --space-xl: 6rem;
  --space-2xl: 10rem;
}

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

html { font-size: 16px; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 2rem;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-light);
}
.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}

/* ── HERO ── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
}
.hero-badge {
  display: inline-block;
  padding: 0.4rem 1.1rem;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: var(--space-md);
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(3.2rem, 8vw, 6.5rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: var(--space-md);
}
.hero-accent {
  background: linear-gradient(135deg, var(--accent), var(--accent-warm));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: clamp(1.05rem, 2vw, 1.25rem);
  line-height: 1.7;
  color: var(--fg-muted);
  max-width: 560px;
  margin: 0 auto;
  font-weight: 300;
}
.hero-glow {
  position: absolute;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 228, 223, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

/* ── PHILOSOPHY ── */
.philosophy {
  padding: var(--space-2xl) var(--space-md);
  border-top: 1px solid var(--border-light);
}
.philosophy-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.philosophy-label,
.features-label,
.comparison-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  margin-bottom: var(--space-md);
}
.philosophy-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.03em;
  color: var(--fg);
  max-width: 700px;
  margin-bottom: var(--space-xl);
}
.text-accent {
  color: var(--accent);
}
.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.philosophy-card {
  padding: 2rem;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--bg-elevated);
  transition: border-color 0.3s ease;
}
.philosophy-card:hover {
  border-color: var(--fg-subtle);
}
.card-number {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent-warm);
  letter-spacing: 0.08em;
  margin-bottom: 1.25rem;
}
.philosophy-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  color: var(--fg);
}
.philosophy-card p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--fg-muted);
  font-weight: 300;
}

/* ── FEATURES ── */
.features {
  padding: var(--space-2xl) var(--space-md);
  border-top: 1px solid var(--border-light);
}
.features-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.features-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: var(--space-xl);
}
.features-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.feature-row {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--border-light);
}
.feature-row:first-child {
  border-top: 1px solid var(--border-light);
}
.feature-icon {
  font-size: 0.6rem;
  color: var(--accent-warm);
  margin-top: 0.55rem;
  flex-shrink: 0;
}
.feature-content h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--fg);
  margin-bottom: 0.4rem;
}
.feature-content p {
  font-size: 0.92rem;
  line-height: 1.65;
  color: var(--fg-muted);
  font-weight: 300;
  max-width: 520px;
}

/* ── COMPARISON ── */
.comparison {
  padding: var(--space-2xl) var(--space-md);
  border-top: 1px solid var(--border-light);
}
.comparison-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}
.comparison-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.03em;
  color: var(--fg);
  margin-bottom: var(--space-lg);
}
.comparison-table {
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  background: var(--bg-elevated);
}
.comp-row {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  border-bottom: 1px solid var(--border-light);
}
.comp-row:last-child {
  border-bottom: none;
}
.comp-row.comp-header {
  background: var(--bg-card);
}
.comp-cell {
  padding: 1.1rem 1.5rem;
  font-size: 0.9rem;
  color: var(--fg-muted);
  font-weight: 300;
}
.comp-cell.comp-label {
  font-weight: 500;
  color: var(--fg);
  font-size: 0.88rem;
}
.comp-cell.comp-them {
  color: var(--fg-subtle);
}
.comp-cell.comp-us {
  color: var(--accent);
  font-weight: 500;
}
.comp-header .comp-cell {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--fg-subtle);
  padding: 0.9rem 1.5rem;
}
.comp-header .comp-us {
  color: var(--accent-warm);
}

/* ── CLOSING ── */
.closing {
  padding: var(--space-2xl) var(--space-md);
  text-align: center;
  border-top: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}
.closing-inner {
  position: relative;
  z-index: 2;
  max-width: 700px;
  margin: 0 auto;
}
.closing-title {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.04em;
  color: var(--fg);
  margin-bottom: var(--space-md);
}
.closing-sub {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  line-height: 1.7;
  color: var(--fg-muted);
  font-weight: 300;
  max-width: 500px;
  margin: 0 auto var(--space-lg);
}
.closing-tagline {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--fg-subtle);
}

/* ── FOOTER ── */
.footer {
  padding: var(--space-md) var(--space-md);
  border-top: 1px solid var(--border-light);
}
.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.footer-brand {
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  color: var(--fg);
}
.footer-copy {
  font-size: 0.8rem;
  color: var(--fg-subtle);
}

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .comp-row {
    grid-template-columns: 1fr;
    gap: 0;
  }
  .comp-row.comp-header {
    display: none;
  }
  .comp-cell {
    padding: 0.75rem 1.25rem;
  }
  .comp-cell.comp-label {
    padding-top: 1.25rem;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--fg-subtle);
  }
  .comp-cell.comp-them::before {
    content: 'Others: ';
    color: var(--fg-subtle);
    font-weight: 500;
  }
  .comp-cell.comp-us::before {
    content: 'Refinery: ';
    color: var(--accent-warm);
    font-weight: 600;
  }
  .hero {
    min-height: 85vh;
    padding: 8rem var(--space-sm) var(--space-lg);
  }
  .philosophy,
  .features,
  .comparison,
  .closing {
    padding: var(--space-xl) var(--space-sm);
  }
  .feature-row {
    padding: 1.5rem 0;
  }
  .nav {
    padding: 1rem 1.25rem;
  }
  .footer-inner {
    flex-direction: column;
    gap: 0.5rem;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2.6rem;
  }
  .closing-title {
    font-size: 2.2rem;
  }
}