:root {
  --bg: #0a0a0c;
  --bg-elevated: #111115;
  --bg-card: #16161b;
  --fg: #e8e6e3;
  --fg-muted: #8a8780;
  --accent: #f0b429;
  --accent-dim: rgba(240, 180, 41, 0.12);
  --accent-glow: rgba(240, 180, 41, 0.06);
  --border: #2a2a30;
  --font-display: '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);
  color: var(--fg);
  font-family: var(--font-display);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

.section-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--accent);
  margin-bottom: 2.5rem;
  font-weight: 500;
}

/* ===== HERO ===== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 2rem 4rem;
  background:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--accent-glow), transparent),
    var(--bg);
}

.hero-inner {
  max-width: 860px;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--accent);
  border: 1px solid var(--accent);
  padding: 0.4em 1.2em;
  border-radius: 2px;
  margin-bottom: 2.5rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4.2rem);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto 3.5rem;
  line-height: 1.7;
}

.hero-stat-row {
  display: flex;
  gap: 2rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-stat {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1.5rem 1.8rem;
  text-align: left;
  min-width: 200px;
  flex: 1;
  max-width: 240px;
}

.stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 0.3rem;
}

.stat-label {
  font-size: 0.82rem;
  color: var(--fg-muted);
  line-height: 1.45;
}

/* ===== LEAK / DIAGNOSIS ===== */
.leak {
  padding: 7rem 2rem;
  background: var(--bg-elevated);
}

.leak-inner {
  max-width: 960px;
  margin: 0 auto;
}

.leak-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.leak-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem;
  position: relative;
}

.leak-card:hover {
  border-color: var(--accent);
  background: linear-gradient(135deg, var(--accent-dim), var(--bg));
}

.leak-icon {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.leak-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.leak-card p {
  font-size: 0.92rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* ===== MACHINE ===== */
.machine {
  padding: 7rem 2rem;
  background: var(--bg);
}

.machine-inner {
  max-width: 720px;
  margin: 0 auto;
}

.machine-intro {
  font-size: 1.15rem;
  color: var(--fg-muted);
  margin-bottom: 3.5rem;
  max-width: 560px;
}

.machine-flow {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.flow-step {
  display: flex;
  gap: 1.8rem;
  align-items: flex-start;
  padding: 2rem 0;
  border-left: 2px solid var(--border);
  padding-left: 2rem;
  position: relative;
}

.flow-step::before {
  content: '';
  position: absolute;
  left: -6px;
  top: 2.4rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent);
}

.flow-number {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
  background: var(--accent-dim);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  flex-shrink: 0;
  font-weight: 600;
}

.flow-content h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.flow-content p {
  font-size: 0.92rem;
  color: var(--fg-muted);
  line-height: 1.6;
}

.flow-connector {
  display: none;
}

/* ===== NUMBERS ===== */
.numbers {
  padding: 7rem 2rem;
  background: var(--bg-elevated);
}

.numbers-inner {
  max-width: 960px;
  margin: 0 auto;
}

.numbers-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  margin-bottom: 2.5rem;
}

.number-block {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2rem 1.5rem;
  text-align: center;
}

.number-value {
  font-family: var(--font-mono);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.8rem;
}

.number-desc {
  font-size: 0.85rem;
  color: var(--fg-muted);
  line-height: 1.5;
}

.numbers-note {
  text-align: center;
  font-size: 0.92rem;
  color: var(--fg-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ===== CLOSING ===== */
.closing {
  padding: 8rem 2rem;
  background:
    radial-gradient(ellipse 60% 40% at 50% 100%, var(--accent-glow), transparent),
    var(--bg);
  text-align: center;
}

.closing-inner {
  max-width: 680px;
  margin: 0 auto;
}

.closing h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  letter-spacing: -0.01em;
}

.closing-text {
  font-size: 1.05rem;
  color: var(--fg-muted);
  line-height: 1.7;
}

/* ===== FOOTER ===== */
.site-footer {
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 1rem;
  justify-content: center;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--fg);
}

.footer-divider {
  width: 1px;
  height: 14px;
  background: var(--border);
}

.footer-tagline {
  font-size: 0.8rem;
  color: var(--fg-muted);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero { padding: 4rem 1.5rem 3rem; }
  .hero-stat-row { flex-direction: column; align-items: center; }
  .hero-stat { max-width: 100%; min-width: auto; }
  .leak-grid { grid-template-columns: 1fr; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .leak, .machine, .numbers, .closing { padding: 4rem 1.5rem; }
  .flow-step { padding-left: 1.5rem; }
}

@media (max-width: 480px) {
  .numbers-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 2rem; }
  .closing h2 { font-size: 1.6rem; }
  .footer-inner { flex-direction: column; gap: 0.5rem; }
  .footer-divider { width: 30px; height: 1px; }
}