@import url('https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── TOKENS ── */
:root {
  --paper: #FDFAF3;
  --paper-2: #FFFEF9;
  --paper-3: #F5EDD9;
  --ink: #1A1208;
  --ink-2: #3D2E18;
  --muted: #7A6A52;
  --rule: #C8B49A;
  --rule-soft: #E8D9C4;
  --gold: #16A34A;
  --gold-soft: #86EFAC;
  --navy: #0369A1;
  --navy-soft: #7DD3FC;
  --rust: #DC2626;
  --amber: #D97706;
  --moss: #0D9488;
  --shadow: 0 1px 3px rgba(26,18,8,0.07), 0 4px 12px -2px rgba(26,18,8,0.10);
  --shadow-deep: 0 4px 6px rgba(26,18,8,0.06), 0 12px 40px -8px rgba(26,18,8,0.14);
}

/* ── RESET ── */
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'Inter', sans-serif;
  font-weight: 400;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.55;
  font-size: 16px;
  font-feature-settings: "ss01", "ss02";
  background-image:
    radial-gradient(circle at 15% 0%, rgba(22,163,74,0.13) 0%, transparent 50%),
    radial-gradient(circle at 85% 100%, rgba(217,119,6,0.07) 0%, transparent 45%);
}
code, .mono { font-family: 'JetBrains Mono', monospace; font-feature-settings: "ss02", "zero"; font-size: 0.92em; }
a { color: inherit; text-decoration: none; }

/* ── NAV ── */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(253,250,243,0.93);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--rule-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 6vw;
  height: 56px;
}
.nav-logo {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--ink);
  text-decoration: none;
}
.nav-logo span { color: var(--gold); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink-2);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-links { display: flex; gap: 0.25rem; }
.nav-links a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  padding: 0.4rem 0.75rem;
  border-radius: 4px;
  transition: all 0.15s;
  text-decoration: none;
}
.nav-links a:hover { color: var(--ink); background: var(--paper-3); }
.nav-links a.active { color: var(--ink); }
.nav-links a.nav-cta {
  color: #fff;
  background: #16a34a;
  border-radius: 4px;
  margin-left: 0.25rem;
}
.nav-links a.nav-cta:hover { background: #15803d; color: #fff; }
.nav-links a.nav-cta.active { background: #15803d; color: #fff; }

@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0.25rem;
    background: rgba(253,250,243,0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--rule-soft);
    padding: 0.75rem 6vw 1rem;
    box-shadow: 0 8px 24px -4px rgba(15,23,42,0.12);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 0.6rem 0.75rem; }
  .nav-links a.nav-cta { margin-left: 0; }
}

/* ── LANG SWITCHER ── */
.lang-switcher {
  display: flex;
  align-items: center;
  border: 1px solid var(--rule-soft);
  border-radius: 4px;
  overflow: hidden;
  flex-shrink: 0;
}
.lang-btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.62rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.28rem 0.55rem;
  transition: color 0.15s, background 0.15s;
  line-height: 1;
}
.lang-btn:hover { color: var(--ink); background: var(--paper-3); }
.lang-btn--active { color: var(--gold); background: rgba(22,163,74,0.08); }
.lang-btn + .lang-btn { border-left: 1px solid var(--rule-soft); }

/* Footer variant */
.lang-switcher--footer {
  margin-top: 0.75rem;
}
@media (min-width: 768px) {
  .lang-switcher--footer {
    margin-top: 0;
  }
}

/* ── OVERLINE ── */
.overline {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
.overline::before { content: ''; width: 24px; height: 1px; background: var(--gold); }

/* ── SECTION LABEL ── */
.section-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.section-label::before { content: ''; width: 18px; height: 1px; background: var(--gold); }

/* ── PAGE HERO ── */
.page-hero {
  padding: 5rem 6vw 4rem;
  border-bottom: 1px solid var(--rule-soft);
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(22,163,74,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22,163,74,0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.page-hero-inner { max-width: 1100px; margin: 0 auto; position: relative; }
.page-hero h1 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: clamp(2.4rem, 5vw, 4.2rem);
  line-height: 0.97;
  letter-spacing: -0.02em;
  font-weight: 500;
  margin-bottom: 1.5rem;
  color: var(--ink);
}
.page-hero h1 em { font-style: italic; color: var(--gold); font-weight: 400; }
.page-hero .lead { font-size: 1.05rem; color: var(--ink-2); max-width: 44rem; line-height: 1.65; }

/* ── BUTTONS ── */
.btn {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.78rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  display: inline-block;
}
.btn-primary { background: var(--gold); color: #fff; border: 1.5px solid var(--gold); }
.btn-primary:hover { background: #15803D; border-color: #15803D; }
.btn-ghost { background: transparent; color: var(--ink-2); border: 1.5px solid var(--rule); }
.btn-ghost:hover { border-color: var(--gold); color: var(--gold); background: rgba(22,163,74,0.06); }
.btn-light { background: #fff; color: var(--ink); border: 1.5px solid #fff; }
.btn-light:hover { background: var(--gold-soft); border-color: var(--gold-soft); color: #0F172A; }
.btn-outline { background: transparent; color: rgba(248,250,252,0.65); border: 1.5px solid rgba(248,250,252,0.2); }
.btn-outline:hover { color: #fff; border-color: rgba(248,250,252,0.5); }

/* ── FOOTER ── */
.site-footer {
  border-top: 1.5px solid var(--rule);
  background: var(--paper-3);
  padding: 4rem 6vw 2.5rem;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2.5rem;
  margin-bottom: 3rem;
}
.footer-col {
  display: flex;
  flex-direction: column;
}
.footer-col-title {
  font-family: 'Space Grotesk', sans-serif;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
  padding-bottom: 0.6rem;
  margin-bottom: 0.75rem;
  border-bottom: 1px solid var(--rule);
  display: block;
}
a.footer-col-title:hover { color: var(--gold); }
.footer-col a {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.68rem;
  letter-spacing: 0.03em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
  padding: 0.22rem 0;
  display: block;
}
.footer-col a:hover { color: var(--ink); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  border-top: 1px solid var(--rule-soft);
  padding-top: 1.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
@media (max-width: 860px) {
  .footer-nav { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .footer-nav { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ── DARK MODE ── */
@media (prefers-color-scheme: dark) {

  :root {
    --paper:      #0F172A;
    --paper-2:    #1E293B;
    --paper-3:    #162133;
    --ink:        #F1F5F9;
    --ink-2:      #CBD5E1;
    --muted:      #94A3B8;
    --rule:       #334155;
    --rule-soft:  #243044;
    --gold:       #22C55E;
    --gold-soft:  #4ADE80;
    --shadow:     0 1px 3px rgba(0,0,0,0.4), 0 4px 12px -2px rgba(0,0,0,0.5);
    --shadow-deep: 0 4px 6px rgba(0,0,0,0.4), 0 12px 40px -8px rgba(0,0,0,0.6);
  }

  body {
    background-image:
      radial-gradient(circle at 15% 0%, rgba(34,197,94,0.11) 0%, transparent 50%),
      radial-gradient(circle at 85% 100%, rgba(2,132,199,0.07) 0%, transparent 45%);
  }

  /* Nav backdrop */
  .site-nav {
    background: rgba(15,23,42,0.92);
    border-bottom-color: var(--rule-soft);
  }
  .nav-links {
    background: rgba(15,23,42,0.97);
  }

  /* Grid pattern on hero + page-hero backgrounds */
  .hero::before {
    background-image:
      linear-gradient(rgba(34,197,94,0.07) 1px, transparent 1px),
      linear-gradient(90deg, rgba(34,197,94,0.07) 1px, transparent 1px) !important;
  }
  .page-hero::before {
    background-image:
      linear-gradient(rgba(34,197,94,0.07) 1px, transparent 1px),
      linear-gradient(90deg, rgba(34,197,94,0.07) 1px, transparent 1px) !important;
  }

  /* Terminal / JSON code blocks — page bg is now the same dark as the block was in light
     mode, so brighten them slightly to maintain the card-like contrast */
  .hero-code {
    background: #1A2846 !important;
    border-color: #2A3F5F !important;
    box-shadow: 0 20px 60px -15px rgba(0,0,0,0.6), 0 4px 16px rgba(0,0,0,0.4) !important;
  }
  .code-header {
    background: #213256 !important;
    border-bottom-color: #2D4263 !important;
  }
  .ex-json {
    background: #1A2846 !important;
  }
  .json-toolbar {
    background: #213256 !important;
    border-bottom-color: #2D4263 !important;
  }

  /* CTA banner — distinguish from the dark page bg */
  .cta-banner {
    background: linear-gradient(135deg, #0B1425 0%, #091A0F 60%, #0B2113 100%) !important;
    border-top: 1px solid rgba(34,197,94,0.2);
  }

  /* btn-light is used inside the already-dark CTA banner, keep it white */
  .btn-light { background: #fff; color: #0F172A; border-color: #fff; }
  .btn-light:hover { background: var(--gold-soft); border-color: var(--gold-soft); }

  /* Ghost button hover tint */
  .btn-ghost:hover { background: rgba(34,197,94,0.08); }

  /* Footer — darker than body to ground it visually */
  .site-footer {
    background: #080D18;
    border-top-color: #1E2D45;
  }
  .footer-col-title {
    color: #E2E8F0;
    border-bottom-color: #1E2D45;
  }
  .footer-col a { color: #64748B; }
  .footer-col a:hover { color: #E2E8F0; }
  .footer-bottom { border-top-color: #1A2438; color: #475569; }
}