/* ── Reset & base ──────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --font-sans: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", monospace;

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  --transition: 150ms ease;
}

/* ── Dark theme (default) ─────────────────────────────── */
[data-theme="dark"] {
  --bg:          #0d0d0f;
  --bg-2:        #111114;
  --bg-3:        #18181d;
  --border:      #27272f;
  --border-soft: #1f1f27;

  --text-1:  #f0f0f4;
  --text-2:  #9898a8;
  --text-3:  #6b6b7e;

  --accent:       #6366f1;
  --accent-dim:   rgba(99,102,241,0.12);
  --accent-hover: #818cf8;

  --green:     #34d399;
  --green-dim: rgba(52,211,153,0.14);

  --code-bg:   #161619;
  --code-text: #c4c4d4;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5);
}

/* ── Light theme ──────────────────────────────────────── */
[data-theme="light"] {
  --bg:          #fafafa;
  --bg-2:        #f4f4f6;
  --bg-3:        #ececf0;
  --border:      #e0e0e8;
  --border-soft: #ebebf0;

  --text-1:  #111118;
  --text-2:  #55555f;
  --text-3:  #8888a0;

  --accent:       #4f46e5;
  --accent-dim:   rgba(79,70,229,0.08);
  --accent-hover: #6366f1;

  --green:     #059669;
  --green-dim: rgba(5,150,105,0.1);

  --code-bg:   #f1f1f5;
  --code-text: #374151;

  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
}

/* ── Base ─────────────────────────────────────────────── */
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-1);
  background: var(--bg);
  transition: background var(--transition), color var(--transition);
}

.container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ── Header ───────────────────────────────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border-soft);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--text-1);
  text-decoration: none;
}

.logo-icon {
  width: 22px;
  height: 22px;
  color: var(--accent);
  flex-shrink: 0;
}

.logo-text {
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.badge-internal {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-3);
  background: var(--bg-3);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: var(--radius-full);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-2);
  cursor: pointer;
  transition: color var(--transition), background var(--transition), border-color var(--transition);
}
.theme-toggle:hover { color: var(--text-1); background: var(--bg-3); }
.theme-toggle svg { width: 16px; height: 16px; }

[data-theme="dark"]  .icon-sun  { display: block; }
[data-theme="dark"]  .icon-moon { display: none;  }
[data-theme="light"] .icon-sun  { display: none;  }
[data-theme="light"] .icon-moon { display: block; }

/* ── Hero ─────────────────────────────────────────────── */
.hero {
  padding: var(--space-24) 0 var(--space-20);
  border-bottom: 1px solid var(--border-soft);
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-2);
  margin-bottom: var(--space-6);
}

.dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
}
.dot--green {
  background: var(--green);
  box-shadow: 0 0 0 3px var(--green-dim);
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--text-1);
  margin-bottom: var(--space-6);
}

.hero-subtitle {
  font-size: 1.0625rem;
  color: var(--text-2);
  max-width: 520px;
  margin-bottom: var(--space-8);
  line-height: 1.7;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}

/* ── Buttons ──────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0.625rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
  font-weight: 500;
  font-family: var(--font-sans);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition);
}
.btn svg { width: 16px; height: 16px; flex-shrink: 0; }

.btn--primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 0 0 var(--accent-dim);
}
.btn--primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 0 0 4px var(--accent-dim);
}

.btn--ghost {
  background: transparent;
  color: var(--text-2);
  border: 1px solid var(--border);
}
.btn--ghost:hover { background: var(--bg-3); color: var(--text-1); }

/* ── Sections ─────────────────────────────────────────── */
.section { padding: var(--space-20) 0; }
.section--alt { background: var(--bg-2); }

.section-title {
  font-size: 1.5rem;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--text-1);
  margin-bottom: var(--space-3);
}

.section-subtitle {
  font-size: 0.9375rem;
  color: var(--text-2);
  max-width: 560px;
  margin-bottom: var(--space-12);
  line-height: 1.65;
}

/* ── Model cards ──────────────────────────────────────── */
.model-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-4);
}

.model-card {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.model-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
}

.model-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.model-card__name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
  letter-spacing: -0.015em;
}

.model-card__provider {
  font-size: 0.8rem;
  color: var(--text-3);
  margin-top: 2px;
}

.badge-status {
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  white-space: nowrap;
  flex-shrink: 0;
}
.badge-status--live {
  background: var(--green-dim);
  color: var(--green);
}

.model-card__meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.model-meta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
}
.model-meta-row span:first-child { color: var(--text-3); }
.model-meta-row code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--code-text);
  background: var(--code-bg);
  padding: 2px 6px;
  border-radius: 4px;
}

/* ── Steps ────────────────────────────────────────────── */
.steps {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0;
  counter-reset: steps;
  position: relative;
}

.steps::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 32px;
  bottom: 32px;
  width: 1px;
  background: var(--border);
}

.step {
  display: flex;
  gap: var(--space-6);
  padding: var(--space-6) 0;
  position: relative;
}

.step-number {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--accent);
  background: var(--accent-dim);
  border: 1px solid var(--accent);
  border-radius: var(--radius-full);
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.step-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: var(--space-2);
  letter-spacing: -0.01em;
}

.step-body p {
  font-size: 0.9375rem;
  color: var(--text-2);
  line-height: 1.65;
}

.step-body code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ── Setup blocks ─────────────────────────────────────── */
.setup-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.setup-block {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.setup-block__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.step-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  flex-shrink: 0;
}

.setup-block__desc {
  font-size: 0.9rem;
  color: var(--text-2);
  margin-bottom: var(--space-3);
}

.setup-block__note {
  font-size: 0.8125rem;
  color: var(--text-3);
  margin-top: var(--space-3);
}
.setup-block__note code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-2);
}

.checklist {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.checklist li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: 0.9375rem;
  color: var(--text-2);
}
.checklist li::before {
  content: "";
  display: inline-block;
  width: 16px;
  height: 16px;
  margin-top: 3px;
  flex-shrink: 0;
  background: var(--green-dim);
  border: 1px solid var(--green);
  border-radius: 4px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M3.5 8l3 3 6-6' stroke='%2334d399' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: center;
}
[data-theme="light"] .checklist li::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M3.5 8l3 3 6-6' stroke='%23059669' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
}
.checklist li code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 1px 5px;
  border-radius: 4px;
}

/* ── Code blocks ──────────────────────────────────────── */
.code-block {
  position: relative;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.code-block pre {
  padding: var(--space-4) var(--space-6);
  overflow-x: auto;
  scrollbar-width: thin;
}

.code-block code {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--code-text);
  white-space: pre;
}

.copy-btn {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  background: var(--bg-3);
  border: 1px solid var(--border);
  color: var(--text-3);
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
}
.copy-btn:hover { color: var(--text-1); background: var(--bg); }
.copy-btn svg { width: 14px; height: 14px; }
.copy-btn.copied { color: var(--green); border-color: var(--green); }

/* ── Info card ────────────────────────────────────────── */
.info-card {
  display: flex;
  gap: var(--space-6);
  align-items: flex-start;
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.info-card__icon {
  width: 24px;
  height: 24px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.info-card__title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: var(--space-2);
}

.info-card p {
  font-size: 0.9rem;
  color: var(--text-2);
  line-height: 1.65;
}

/* ── Footer ───────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border-soft);
  padding: var(--space-8) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.8125rem;
  color: var(--text-3);
}
.footer-sep { opacity: 0.4; }

/* ── Responsive ───────────────────────────────────────── */
@media (max-width: 600px) {
  .hero { padding: var(--space-16) 0 var(--space-12); }
  .section, .section--alt { padding: var(--space-16) 0; }

  .steps::before { display: none; }
  .step { flex-direction: column; gap: var(--space-3); }

  .info-card { flex-direction: column; gap: var(--space-4); }

  .header-actions .badge-internal { display: none; }

  .footer-inner { flex-direction: column; align-items: flex-start; gap: var(--space-1); }
  .footer-sep { display: none; }
}