/* AdaptiveAPI marketing site
   Color scheme: warm cream + terracotta + sage
   Style: editorial, generous whitespace, hairline dividers, no decoration without purpose
*/

:root {
  --bg: #F8F4ED;
  --bg-elev: #FFFFFF;
  --bg-soft: #F1E8D6;
  --bg-code: #F4ECDB;
  --text: #1A1612;
  --text-strong: #0F0B07;
  --text-muted: #6B6259;
  --text-faint: #9A8F82;
  --border: #E5DBC8;
  --border-strong: #D4C5A8;
  --accent: #C8553D;
  --accent-hover: #A84432;
  --accent-soft: #F5DCD3;
  --secondary: #5C7A52;
  --secondary-soft: #DCE6D7;
  --code-key: #8B4A2B;
  --code-str: #5C7A52;
  --code-num: #C8553D;
  --code-com: #9A8F82;
  --shadow-sm: 0 1px 2px rgba(40, 28, 18, 0.04);
  --shadow-md: 0 4px 24px rgba(40, 28, 18, 0.06);
  --radius: 10px;
  --radius-lg: 16px;
  --maxw: 1140px;
  --font-sans: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  --font-serif: 'Instrument Serif', Georgia, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --bg: #161310;
  --bg-elev: #1F1A14;
  --bg-soft: #251E16;
  --bg-code: #1B1610;
  --text: #EDE6D8;
  --text-strong: #FFFAEC;
  --text-muted: #9D9388;
  --text-faint: #6B6259;
  --border: #2E2620;
  --border-strong: #3D3328;
  --accent: #E07A60;
  --accent-hover: #ED8970;
  --accent-soft: #3A2620;
  --secondary: #8FA985;
  --secondary-soft: #2A3528;
  --code-key: #D9A678;
  --code-str: #8FA985;
  --code-num: #E07A60;
  --code-com: #6B6259;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.35);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

h1, h2, h3 { color: var(--text-strong); letter-spacing: -0.01em; line-height: 1.15; margin: 0; }
h1 { font-size: clamp(2.4rem, 4.5vw, 3.6rem); font-weight: 600; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.6rem, 2.8vw, 2.2rem); font-weight: 600; }
h3 { font-size: 1.15rem; font-weight: 600; }

h1 em, h2 em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--text-strong);
}

pre code {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: 0.85rem;
  display: block;
  white-space: pre;
  color: var(--text-strong);
}

.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

/* ---------- nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(248, 244, 237, 0.85);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--border);
}
[data-theme="dark"] .nav { background: rgba(22, 19, 16, 0.85); }

.nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 14px 28px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-strong);
  font-weight: 600;
  font-size: 1.05rem;
  letter-spacing: -0.01em;
}
.brand:hover { color: var(--text-strong); }

.brand-mark {
  color: var(--accent);
  font-size: 0.95em;
}
.brand-name em {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 22px;
  margin-left: 24px;
}
.nav-links a {
  color: var(--text-muted);
  font-size: 0.92rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text-strong); }

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 34px;
  height: 34px;
  border-radius: 8px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  transition: border-color 120ms, color 120ms;
}
.theme-toggle:hover { border-color: var(--border-strong); color: var(--text-strong); }
.theme-icon-dark { display: none; }
[data-theme="dark"] .theme-icon-light { display: none; }
[data-theme="dark"] .theme-icon-dark { display: inline; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 120ms, color 120ms, border-color 120ms;
  text-decoration: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #FFF7F0;
}
.btn-primary:hover { background: var(--accent-hover); color: #FFF7F0; }
[data-theme="dark"] .btn-primary { color: #1A1612; }
[data-theme="dark"] .btn-primary:hover { color: #1A1612; }

.btn-ghost {
  background: transparent;
  color: var(--text-strong);
  border-color: var(--border);
}
.btn-ghost:hover {
  border-color: var(--border-strong);
  background: var(--bg-soft);
  color: var(--text-strong);
}
.btn-lg {
  padding: 12px 20px;
  font-size: 0.98rem;
}

/* ---------- hero ---------- */

.hero {
  padding: 80px 0 60px;
  border-bottom: 1px solid var(--border);
}
.hero-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
}
@media (max-width: 920px) {
  .hero-grid { grid-template-columns: 1fr; gap: 48px; }
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--secondary);
  margin-bottom: 18px;
}

.lede {
  font-size: 1.08rem;
  color: var(--text-muted);
  max-width: 56ch;
  margin: 18px 0 0;
}
.lede + .lede { margin-top: 14px; }

.hero h1 { margin-bottom: 6px; }

.hero-ctas {
  display: flex;
  gap: 12px;
  margin: 32px 0 24px;
  flex-wrap: wrap;
}

.hero-bullets {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--text-muted);
  font-size: 0.96rem;
}
.hero-bullets .check {
  color: var(--secondary);
  font-weight: 600;
  margin-right: 8px;
}

/* hero mock */
.hero-mock { width: 100%; }
.mock-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
.mock-head {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
}
.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--border-strong);
}
.dot-a { background: #D9776A; }
.dot-b { background: #D9B36A; }
.dot-c { background: #8FB07A; }
.mock-title {
  margin-left: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.mock-body {
  padding: 20px 22px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}
.lane {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background: var(--bg-soft);
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.lane-back { background: var(--accent-soft); border-color: transparent; }
[data-theme="dark"] .lane-back { background: var(--accent-soft); }
.lane code {
  background: transparent;
  border: 0;
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-strong);
}
.lane code.muted { color: var(--text-muted); font-style: italic; }
.lane-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 2px;
}
.lane-tag.lane-mid { color: var(--accent); }
.arrow {
  color: var(--text-faint);
  font-size: 0.95rem;
  margin: 2px 0;
}
.mock-foot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--border);
  background: var(--bg-elev);
}
.pill {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--secondary);
  background: var(--secondary-soft);
  padding: 3px 9px;
  border-radius: 999px;
}

/* ---------- problem ---------- */

.problem {
  padding: 90px 0;
  border-bottom: 1px solid var(--border);
  text-align: center;
}
.quote {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  line-height: 1.25;
  color: var(--text-strong);
  max-width: 22ch;
  margin: 0 auto 24px;
  letter-spacing: -0.01em;
}
.problem-sub {
  max-width: 60ch;
  margin: 0 auto;
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ---------- section heads ---------- */

.section-head {
  text-align: center;
  margin: 0 auto 56px;
  max-width: 720px;
}
.section-head h2 { margin-top: 6px; }

/* ---------- how ---------- */

.how { padding: 90px 0; border-bottom: 1px solid var(--border); }
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
@media (max-width: 920px) {
  .steps { grid-template-columns: 1fr; }
}
.step {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  position: relative;
}
.step-num {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.4rem;
  color: var(--accent);
  display: block;
  margin-bottom: 10px;
}
.step h3 { margin-bottom: 10px; }
.step p { color: var(--text-muted); margin: 0; font-size: 0.96rem; }

/* ---------- examples / tabs ---------- */

.examples { padding: 90px 0; border-bottom: 1px solid var(--border); }
.tabs {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  max-width: 920px;
  margin: 0 auto;
}
.tablist {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--bg-soft);
  overflow-x: auto;
}
.tab {
  background: transparent;
  border: 0;
  padding: 14px 22px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
  transition: color 120ms, border-color 120ms;
}
.tab:hover { color: var(--text-strong); }
.tab.is-active {
  color: var(--text-strong);
  border-bottom-color: var(--accent);
}
.tabpanels { background: var(--bg-code); }
.tabpanel {
  display: none;
  margin: 0;
  padding: 24px 28px;
  overflow-x: auto;
  font-size: 0.85rem;
  background: var(--bg-code);
}
.tabpanel.is-active { display: block; }
.t-key { color: var(--code-key); font-weight: 500; }
.t-str { color: var(--code-str); }
.t-num { color: var(--code-num); }
.t-com { color: var(--code-com); font-style: italic; }

/* ---------- features ---------- */

.features { padding: 90px 0; border-bottom: 1px solid var(--border); }
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 920px) {
  .feature-grid { grid-template-columns: 1fr; }
}
.feature {
  padding: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.feature h3 { margin-bottom: 8px; }
.feature p { color: var(--text-muted); font-size: 0.94rem; margin: 0; }
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 1.2rem;
  margin-bottom: 16px;
}

/* ---------- quickstart ---------- */

.quickstart { padding: 90px 0; border-bottom: 1px solid var(--border); }
.quick-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 32px;
  align-items: stretch;
}
@media (max-width: 920px) {
  .quick-grid { grid-template-columns: 1fr; }
}
.quick-code {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin: 0;
  padding: 24px 26px;
  overflow-x: auto;
  font-size: 0.88rem;
}
.quick-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
}
.quick-list li {
  color: var(--text-muted);
  font-size: 0.98rem;
}
.quick-list strong { color: var(--text-strong); font-weight: 600; }
.bullet {
  color: var(--accent);
  margin-right: 10px;
  font-weight: 600;
}

/* ---------- deploy ---------- */

.deploy { padding: 90px 0; border-bottom: 1px solid var(--border); }
.deploy-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 920px) {
  .deploy-grid { grid-template-columns: 1fr; }
}
.deploy-card {
  padding: 28px;
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.deploy-card h3 { margin-bottom: 10px; }
.deploy-card > p { color: var(--text-muted); font-size: 0.95rem; }
.deploy-card ul {
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.92rem;
  color: var(--text-muted);
}
.deploy-card .check { color: var(--secondary); font-weight: 600; margin-right: 8px; }

/* ---------- faq ---------- */

.faq { padding: 90px 0; border-bottom: 1px solid var(--border); }
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
}
.faq-list details {
  border-top: 1px solid var(--border);
  padding: 18px 4px;
}
.faq-list details:last-child { border-bottom: 1px solid var(--border); }
.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--text-strong);
  font-size: 1.02rem;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  color: var(--accent);
  font-weight: 400;
  font-size: 1.4rem;
  line-height: 1;
  transition: transform 200ms;
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p {
  margin: 12px 0 4px;
  color: var(--text-muted);
  font-size: 0.96rem;
}

/* ---------- cta ---------- */

.cta {
  padding: 100px 0;
  text-align: center;
}
.cta-inner {
  max-width: 720px;
}
.cta h2 {
  font-family: var(--font-serif);
  font-style: italic;
  font-weight: 400;
  font-size: clamp(2rem, 3.6vw, 2.8rem);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.cta p { color: var(--text-muted); font-size: 1.05rem; margin-bottom: 28px; }
.cta-actions {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

/* ---------- footer ---------- */

.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 40px 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 24px;
}
@media (max-width: 720px) {
  .footer-inner {
    grid-template-columns: 1fr;
    text-align: center;
    justify-items: center;
  }
}
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-strong);
  font-weight: 600;
}
.footer-meta {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin: 0;
}
.footer-links {
  display: inline-flex;
  gap: 18px;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
}
.footer-links a:hover { color: var(--accent); }

/* ---------- selection / focus ---------- */

::selection { background: var(--accent-soft); color: var(--text-strong); }

a:focus-visible,
button:focus-visible,
.btn:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 6px;
}

/* ---------- small responsive tweaks ---------- */

@media (max-width: 720px) {
  .nav-links { display: none; }
  .nav-inner { gap: 12px; }
  .hero { padding: 60px 0 40px; }
  .problem, .how, .examples, .features, .quickstart, .deploy, .faq, .cta {
    padding: 60px 0;
  }
}