:root {
  --bg: #0a0a0c;
  --bg-elevated: #111116;
  --bg-card: #16161c;
  --fg: #e8e6e3;
  --fg-muted: #8a8a8f;
  --fg-dim: #5a5a60;
  --accent: #c8ff00;
  --accent-dim: rgba(200, 255, 0, 0.12);
  --border: #222228;
  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --max-w: 1140px;
  --gutter: 24px;
}

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

body {
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* === HERO === */
.hero {
  padding: 120px var(--gutter) 80px;
  max-width: var(--max-w);
  margin: 0 auto;
}

.hero-inner {
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 8px 16px;
  border-radius: 4px;
  margin-bottom: 40px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 32px;
}

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

.hero .lede {
  font-size: 19px;
  color: var(--fg-muted);
  max-width: 560px;
  line-height: 1.65;
}

.hero-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  margin-top: 72px;
  border: 1px solid var(--border);
}

.hero-stat {
  background: var(--bg);
  padding: 36px 28px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 700;
  color: var(--accent);
}

.stat-label {
  font-size: 14px;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* === PROBLEM === */
.problem {
  padding: 100px var(--gutter);
  background: var(--bg-elevated);
}

.problem-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.problem-label,
.services-label,
.stack-label {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 48px;
}

.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.problem-card {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.problem-icon {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--fg-dim);
  margin-bottom: 20px;
}

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.problem-card p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* === SERVICES === */
.services {
  padding: 100px var(--gutter);
  max-width: var(--max-w);
  margin: 0 auto;
}

.services-header {
  margin-bottom: 64px;
}

.services-header h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.services-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
}

.service-item {
  background: var(--bg);
  padding: 44px 36px;
}

.service-tag {
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  display: inline-block;
  padding: 4px 10px;
  border-radius: 3px;
  margin-bottom: 20px;
}

.service-item h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.service-item p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* === STACK === */
.stack {
  padding: 100px var(--gutter);
  background: var(--bg-elevated);
}

.stack-inner {
  max-width: var(--max-w);
  margin: 0 auto;
}

.stack h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 48px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.stack-desc {
  color: var(--fg-muted);
  font-size: 18px;
  margin-bottom: 56px;
  max-width: 520px;
}

.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.stack-item {
  padding: 36px 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 8px;
}

.stack-name {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 4px;
}

.stack-role {
  font-size: 13px;
  color: var(--fg-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.stack-item p {
  font-size: 15px;
  color: var(--fg-muted);
  line-height: 1.6;
}

/* === CLOSING === */
.closing {
  padding: 120px var(--gutter);
  text-align: center;
}

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

.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(28px, 3.5vw, 40px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.closing-sub {
  font-size: 18px;
  color: var(--fg-muted);
  line-height: 1.65;
  margin-bottom: 48px;
}

.closing-line {
  width: 48px;
  height: 3px;
  background: var(--accent);
  margin: 0 auto 24px;
}

.closing-tagline {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

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

.footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
}

.footer-detail {
  font-size: 13px;
  color: var(--fg-dim);
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
  .hero { padding: 80px var(--gutter) 60px; }
  .hero-grid { grid-template-columns: 1fr; }
  .problem-grid { grid-template-columns: 1fr; }
  .services-list { grid-template-columns: 1fr; }
  .stack-grid { grid-template-columns: 1fr; }
  .footer-inner { flex-direction: column; gap: 12px; text-align: center; }
}

@media (max-width: 480px) {
  :root { --gutter: 18px; }
  .hero h1 { font-size: 36px; }
  .service-item { padding: 32px 24px; }
  .problem-card { padding: 28px 22px; }
  .stack-item { padding: 28px 22px; }
}