:root {
  --bg: #0b1326;
  --surface: #131b2e;
  --surface-high: #1e293b;
  --on-bg: #dae2fd;
  --on-muted: #9aa7c7;
  --primary: #4edea3;
  --gold: #e9c349;
  --blue: #5ea0ff;
  --outline: #86948a;
  --danger: #ff6b6b;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--on-bg);
  font-family: "Manrope", system-ui, sans-serif;
  line-height: 1.6;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", system-ui, sans-serif;
  letter-spacing: -0.02em;
}

code, pre, .mono {
  font-family: "JetBrains Mono", ui-monospace, monospace;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  color: var(--primary);
}

.container {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Nav ---------- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  border-bottom: 1px solid rgba(78, 222, 163, 0.12);
  position: sticky;
  top: 0;
  background: rgba(11, 19, 38, 0.92);
  backdrop-filter: blur(8px);
  z-index: 50;
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--on-bg);
}

.brand {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
}

.brand .accent {
  color: var(--primary);
}

.nav-links {
  display: flex;
  gap: 20px;
  align-items: center;
}

.nav-links a {
  color: var(--primary);
  text-decoration: none;
  font-size: 0.92rem;
  transition: color 0.15s ease;
}

.nav-links a:hover {
  color: var(--primary);
}

/* ---------- Responsive nav ---------- */
@media (max-width: 640px) {
  .nav {
    flex-wrap: wrap;
    row-gap: 10px;
    padding: 14px 16px;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 8px;
    flex-wrap: wrap;
  }

  .nav-links a {
    font-size: 0.85rem;
  }
}

.badge {
  display: inline-block;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.7rem;
  background: rgba(78, 222, 163, 0.15);
  color: var(--primary);
  border: 1px solid rgba(78, 222, 163, 0.35);
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.05em;
}

/* ---------- Hero ---------- */
.hero {
  text-align: center;
  padding: 88px 24px 64px;
}

.hero h1 {
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.1;
  margin-bottom: 16px;
}

.hero p.lede {
  max-width: 640px;
  margin: 0 auto 28px;
  color: var(--on-muted);
  font-size: 1.12rem;
}

.typed {
  color: var(--on-muted);
  white-space: nowrap;
}

.typed-cursor {
  display: inline-block;
  width: 3px;
  height: 0.9em;
  background: var(--primary);
  margin-left: 2px;
  vertical-align: baseline;
  animation: typed-blink 1s step-end infinite;
}

@keyframes typed-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.cta-row {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}

.btn-primary {
  background: var(--primary);
  color: #002113;
}

.btn-ghost {
  border: 1px solid var(--primary);
  color: var(--primary);
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-icon {
  width: 1em;
  height: 1em;
  vertical-align: -0.125em;
  margin-right: 6px;
  display: inline-block;
  fill: currentColor;
}

/* ---------- Sections ---------- */
section {
  padding: 56px 0;
}

.section-title {
  font-size: 1.7rem;
  margin-bottom: 12px;
}

.section-sub {
  color: var(--on-muted);
  max-width: 640px;
  margin-bottom: 28px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

.card {
  background: var(--surface);
  border: 1px solid rgba(78, 222, 163, 0.12);
  border-radius: 14px;
  padding: 22px;
}

.card h3 {
  margin-bottom: 8px;
  font-size: 1.05rem;
}

.card p {
  color: var(--on-muted);
  font-size: 0.92rem;
}

/* ---------- Steps ---------- */
.steps {
  counter-reset: step;
  list-style: none;
}

.steps li {
  position: relative;
  padding: 0 0 24px 56px;
  counter-increment: step;
}

.steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(78, 222, 163, 0.15);
  border: 1px solid rgba(78, 222, 163, 0.4);
  color: var(--primary);
  display: grid;
  place-items: center;
  font-family: "JetBrains Mono", monospace;
  font-weight: 700;
}

.steps li h3 {
  margin-bottom: 4px;
}

.steps li p {
  color: var(--on-muted);
  font-size: 0.95rem;
}

/* ---------- Code ---------- */
pre {
  background: var(--surface-high);
  border: 1px solid rgba(78, 222, 163, 0.12);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 0.86rem;
  margin: 12px 0 24px;
  color: #cfe3ff;
}

pre .c { color: var(--outline); }
pre .k { color: var(--gold); }
pre .s { color: var(--primary); }
pre .n { color: #89ceff; }

/* ---------- Callouts ---------- */
.note, .warn, .ok {
  border-left: 3px solid var(--primary);
  background: rgba(78, 222, 163, 0.08);
  padding: 12px 16px;
  border-radius: 0 10px 10px 0;
  margin: 16px 0;
  font-size: 0.94rem;
}

.warn {
  border-left-color: var(--gold);
  background: rgba(233, 195, 73, 0.08);
}

.ok {
  border-left-color: var(--primary);
  background: rgba(78, 222, 163, 0.08);
}

/* ---------- Table ---------- */
.table-wrap {
  overflow-x: auto;
  margin: 12px 0 24px;
  border-radius: 12px;
  border: 1px solid rgba(78, 222, 163, 0.12);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

th, td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(78, 222, 163, 0.08);
}

th {
  font-family: "Space Grotesk", sans-serif;
  color: var(--primary);
  background: var(--surface);
}

tbody tr:hover {
  background: rgba(78, 222, 163, 0.05);
}

/* ---------- Footer ---------- */
footer {
  border-top: 1px solid rgba(78, 222, 163, 0.12);
  padding: 32px 24px;
  text-align: center;
  color: var(--on-muted);
  font-size: 0.88rem;
}

footer a {
  color: var(--primary);
  text-decoration: none;
}

/* ---------- Page header (inner pages) ---------- */
.page-header {
  padding: 56px 0 8px;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  margin-bottom: 8px;
}

.page-header p {
  color: var(--on-muted);
  max-width: 640px;
}

.content {
  padding-bottom: 56px;
}

.content h2 {
  font-size: 1.4rem;
  margin: 36px 0 12px;
  padding-top: 12px;
}

.content h3 {
  font-size: 1.1rem;
  margin: 24px 0 8px;
}

.content p {
  margin-bottom: 12px;
}

.content ul, .content ol {
  padding-left: 24px;
  margin-bottom: 16px;
}

.content li {
  margin-bottom: 6px;
}

.content a {
  color: var(--primary);
}

/* ---------- FAQ ---------- */
.faq-item {
  background: var(--surface);
  border: 1px solid rgba(78, 222, 163, 0.12);
  border-radius: 12px;
  padding: 20px 22px;
  margin-bottom: 12px;
}

.faq-item h3 {
  margin-bottom: 8px;
  color: var(--on-bg);
}

.faq-item p {
  color: var(--on-muted);
  font-size: 0.95rem;
}

.muted { color: var(--on-muted); }
.accent { color: var(--primary); }
.gold { color: var(--gold); }

/* ---------- Model chips ---------- */
.chip {
  display: inline-block;
  background: rgba(94, 160, 255, 0.08);
  border: 1px solid rgba(94, 160, 255, 0.22);
  border-radius: 6px;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  font-size: 0.82rem;
  color: var(--blue);
}

.chip-free {
  background: rgba(78, 222, 163, 0.08);
  border-color: rgba(78, 222, 163, 0.25);
  color: var(--primary);
}