/* ==============================================================
   QiFlux marketing site v2 — shared stylesheet
   Aligned with app screens: Geist + Instrument Serif italic
   + JetBrains Mono · peach / plum / midnight · pearl-radial.
   Loads tokens from ../colors_and_type.css
   ============================================================== */

@import url('/colors_and_type.css');

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--qf-font-en);
  font-size: 16px;
  line-height: 1.6;
  color: var(--qf-fg-1);
  background: var(--qf-surface);
  -webkit-font-smoothing: antialiased;
  font-feature-settings: "ss01", "cv11";
}

/* Dark mode base */
[data-theme="dark"] body {
  background: var(--qf-secondary-900);
  color: var(--qf-fg-1);
}

/* ---------- Type ---------- */
.eyebrow {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--qf-fg-3); margin: 0;
}
.serif {
  font-family: var(--qf-font-editorial);
  font-style: italic; font-weight: 400;
  letter-spacing: -0.005em;
  color: var(--qf-primary-700);
}
.mono {
  font-family: var(--qf-font-mono);
  font-variant-numeric: tabular-nums;
}
h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600; letter-spacing: -0.02em; line-height: 1.05;
  color: var(--qf-fg-1);
  text-wrap: balance;
}
h1 { font-size: clamp(40px, 6vw, 76px); letter-spacing: -0.03em; }
h2 { font-size: clamp(28px, 3.6vw, 44px); letter-spacing: -0.025em; }
h3 { font-size: 22px; letter-spacing: -0.015em; }
p  { margin: 0; line-height: 1.6; color: var(--qf-fg-2); text-wrap: pretty; }
a  { color: var(--qf-fg-link); text-decoration: none; transition: opacity 200ms; }
a:hover { opacity: 0.7; }

/* ---------- Layout primitives ---------- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 28px; }
.container-narrow { max-width: 800px; margin: 0 auto; padding: 0 28px; }
.section { padding: 96px 0; }
.section-tight { padding: 56px 0; }
.divider { height: 1px; background: var(--qf-border-1); border: 0; margin: 0; }

.row-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px; }
.row-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.row-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
@media (max-width: 880px) {
  .row-2, .row-3, .row-4 { grid-template-columns: 1fr; gap: 20px; }
  .section { padding: 64px 0; }
}

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  padding: 16px 28px;
  background: rgba(252, 250, 253, 0.78);
  backdrop-filter: blur(14px) saturate(1.05);
  -webkit-backdrop-filter: blur(14px) saturate(1.05);
  border-bottom: 1px solid var(--qf-border-1);
}
[data-theme="dark"] .nav {
  background: rgba(38, 24, 73, 0.72);
  border-bottom-color: rgba(255,255,255,0.06);
}
.nav .brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 600; font-size: 17px; letter-spacing: -0.02em;
  color: var(--qf-fg-1);
}
.nav .brand img {
  width: 28px; height: 28px; border-radius: 50%;
  box-shadow: var(--qf-shadow-e1);
}
.nav .links {
  display: flex; gap: 22px;
  font-size: 14px;
}
.nav .links a { color: var(--qf-fg-2); }
.nav .links a:hover { color: var(--qf-fg-1); opacity: 1; }
.nav .actions { display: flex; gap: 10px; align-items: center; }
@media (max-width: 760px) { .nav .links { display: none; } }

/* ---------- Theme toggle button ---------- */
.theme-btn {
  width: 32px; height: 32px; border-radius: 50%;
  border: 1px solid var(--qf-border-2);
  background: var(--qf-surface-raised);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  color: var(--qf-fg-2);
  transition: background 200ms, border-color 200ms;
}
.theme-btn:hover { background: var(--qf-primary-50); border-color: var(--qf-primary-300); }
[data-theme="dark"] .theme-btn { background: var(--qf-secondary-800); border-color: rgba(255,255,255,0.10); color: var(--qf-fg-1); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 20px;
  border-radius: 9999px;
  font-size: 14px; font-weight: 500;
  border: 0; cursor: pointer;
  transition: transform 100ms, box-shadow 200ms, background 200ms;
  text-decoration: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--qf-primary-700);
  color: var(--qf-fg-on-primary);
  box-shadow: var(--qf-shadow-e2);
}
.btn-primary:hover { background: var(--qf-primary-800); box-shadow: var(--qf-shadow-e3); }
.btn-primary:active { transform: scale(0.97); }
.btn-secondary {
  background: var(--qf-surface-raised);
  color: var(--qf-fg-1);
  border: 1px solid var(--qf-border-2);
}
.btn-secondary:hover { border-color: var(--qf-primary-400); color: var(--qf-primary-700); }
.btn-ghost {
  background: transparent; color: var(--qf-fg-2);
  padding: 10px 16px;
}
[data-theme="dark"] .btn-secondary { background: var(--qf-secondary-800); color: var(--qf-fg-1); border-color: rgba(255,255,255,0.12); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 80px 0 96px;
  background: var(--qf-grad-pearl-radial);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 80% 90%, rgba(38,24,73,0.10), transparent 60%);
  pointer-events: none;
}
.hero .inner { position: relative; z-index: 1; max-width: 980px; margin: 0 auto; padding: 0 28px; }
.hero h1 { color: #fff; }
.hero h1 .serif { color: rgba(253, 216, 211, 0.95); }
.hero p.lede { color: rgba(255,255,255,0.85); font-size: 19px; max-width: 560px; margin-top: 20px; line-height: 1.55; }
.hero .cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 36px; }
.hero .hero-eyebrow { color: rgba(253, 216, 211, 0.85); margin-bottom: 22px; }

/* ---------- Cards ---------- */
.card {
  padding: 28px;
  border-radius: 24px;
  background: var(--qf-surface-raised);
  border: 1px solid var(--qf-border-1);
  box-shadow: var(--qf-shadow-e1);
}
.card-glass {
  padding: 28px;
  border-radius: 24px;
  background: var(--qf-glass-light);
  backdrop-filter: blur(24px);
  border: 1px solid var(--qf-border-glass);
  box-shadow: var(--qf-shadow-e3), var(--qf-shadow-inner-pearl);
}
[data-theme="dark"] .card { background: var(--qf-secondary-800); border-color: rgba(255,255,255,0.06); }

/* Tabular promise stats */
.stat-num {
  font-family: var(--qf-font-editorial);
  font-style: italic; font-weight: 400;
  font-size: clamp(56px, 8vw, 92px);
  line-height: 1; letter-spacing: -0.02em;
  color: var(--qf-primary-700);
}
.stat-lbl {
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--qf-fg-3); margin-top: 12px;
}
.stat-desc { font-size: 14px; color: var(--qf-fg-2); margin-top: 6px; line-height: 1.5; }

/* Pill chip */
.chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 12px; border-radius: 9999px;
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.10em; text-transform: uppercase;
  background: var(--qf-primary-50); color: var(--qf-primary-700);
}
.chip-mauve { background: rgba(184,159,205,0.18); color: var(--qf-secondary-700); }
.chip-success { background: rgba(107,157,126,0.16); color: var(--qf-success); }

/* On-device pill */
.on-device-pill {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 9999px;
  background: rgba(255,255,255,0.16);
  border: 1px solid rgba(255,255,255,0.22);
  color: rgba(255,255,255,0.92);
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.10em; text-transform: uppercase;
}
.on-device-pill .dot { width: 6px; height: 6px; border-radius: 50%; background: #6B9D7E; box-shadow: 0 0 0 3px rgba(107,157,126,0.30); }

/* ---------- Phone mockup ---------- */
.phone {
  width: 280px; height: 580px;
  background: #0a0410; border-radius: 44px;
  padding: 12px;
  box-shadow: var(--qf-shadow-e5), 0 0 0 1px rgba(0,0,0,0.4);
  position: relative;
}
.phone .screen {
  width: 100%; height: 100%;
  border-radius: 32px;
  overflow: hidden;
  background: var(--qf-grad-pearl-radial);
  position: relative;
  display: flex; flex-direction: column; padding: 36px 18px 18px;
}
.phone .notch {
  position: absolute; top: 18px; left: 50%; transform: translateX(-50%);
  width: 90px; height: 26px; background: #000; border-radius: 9999px; z-index: 5;
}

/* ---------- Code block ---------- */
.code {
  font-family: var(--qf-font-mono);
  font-size: 12px;
  background: var(--qf-secondary-900);
  color: #FDD8D3;
  padding: 14px 18px;
  border-radius: 12px;
  overflow-x: auto;
  line-height: 1.5;
}
[data-theme="dark"] .code { background: #1a0e26; }

/* ---------- Footer ---------- */
.footer {
  padding: 64px 0 40px;
  background: var(--qf-secondary-900);
  color: rgba(255,255,255,0.65);
  font-size: 13px;
}
.footer h4 {
  font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase;
  color: rgba(255,255,255,0.45); margin-bottom: 14px; font-weight: 600;
}
.footer a { color: rgba(255,255,255,0.85); display: block; padding: 4px 0; }
.footer a:hover { color: #FDD8D3; opacity: 1; }
.footer .grid {
  display: grid; grid-template-columns: 1.5fr repeat(4, 1fr);
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255,255,255,0.10);
}
@media (max-width: 880px) {
  .footer .grid { grid-template-columns: 1fr 1fr; }
}
.footer .brand-block {
  display: flex; flex-direction: column; gap: 14px; max-width: 280px;
}
.footer .brand-block .name { color: #fff; font-size: 18px; font-weight: 600; letter-spacing: -0.02em; }
.footer .legal {
  margin-top: 28px; display: flex; justify-content: space-between; gap: 16px;
  font-size: 12px; color: rgba(255,255,255,0.45);
  flex-wrap: wrap;
}
.footer .legal .lang-switch {
  display: flex; gap: 14px;
}
.footer .legal .lang-switch a { display: inline; color: rgba(255,255,255,0.6); padding: 0; }

/* ---------- TOC sidebar (privacy/terms) ---------- */
.toc {
  position: sticky; top: 84px;
  max-height: calc(100vh - 100px); overflow-y: auto;
  font-size: 13px;
  padding-right: 16px;
}
.toc h4 {
  font-size: 11px; font-weight: 600;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--qf-fg-3); margin: 0 0 14px;
}
.toc ol { list-style: none; padding: 0; margin: 0; counter-reset: ch; }
.toc ol li { counter-increment: ch; padding: 6px 0; }
.toc ol li::before {
  content: counter(ch, decimal-leading-zero) "  ";
  font-family: var(--qf-font-mono); color: var(--qf-fg-4); margin-right: 8px;
}
.toc ol li a { color: var(--qf-fg-2); }
.toc ol li a:hover { color: var(--qf-primary-700); opacity: 1; }

/* ---------- Long-form prose ---------- */
.prose h2 { margin-top: 64px; margin-bottom: 14px; font-family: var(--qf-font-editorial); font-style: italic; font-weight: 400; color: var(--qf-primary-700); font-size: 36px; letter-spacing: -0.015em; }
.prose h3 { margin-top: 32px; margin-bottom: 10px; font-size: 18px; }
.prose p, .prose ul, .prose ol { margin-bottom: 16px; color: var(--qf-fg-2); font-size: 16px; }
.prose ul, .prose ol { padding-left: 24px; }
.prose li { margin-bottom: 6px; }
.prose strong { color: var(--qf-fg-1); font-weight: 600; }
.prose blockquote {
  margin: 24px 0; padding: 14px 22px;
  border-left: 3px solid var(--qf-primary-300);
  background: var(--qf-primary-50); border-radius: 0 12px 12px 0;
  color: var(--qf-fg-1); font-style: italic;
}
[data-theme="dark"] .prose blockquote { background: rgba(253, 216, 211, 0.06); }
.prose .last-verified {
  display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px;
  border-radius: 9999px; background: rgba(107,157,126,0.16); color: var(--qf-success);
  font-size: 11px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 18px;
}

/* ---------- FAQ accordion ---------- */
.faq { border-top: 1px solid var(--qf-border-1); }
.faq details {
  border-bottom: 1px solid var(--qf-border-1);
  padding: 22px 0;
}
.faq details[open] summary { color: var(--qf-primary-700); }
.faq summary {
  cursor: pointer; list-style: none;
  font-size: 18px; font-weight: 500; letter-spacing: -0.01em;
  color: var(--qf-fg-1);
  display: flex; justify-content: space-between; align-items: flex-start; gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: '+'; font-size: 20px; color: var(--qf-fg-3);
  transition: transform 200ms;
  flex-shrink: 0;
}
.faq details[open] summary::after { content: '−'; color: var(--qf-primary-700); }
.faq .answer { padding-top: 14px; color: var(--qf-fg-2); line-height: 1.65; }
.faq .answer p { margin-bottom: 12px; color: var(--qf-fg-2); }

/* ---------- Promise card ---------- */
.promise-card {
  padding: 32px;
  border-radius: 24px;
  background: var(--qf-surface-raised);
  border: 1px solid var(--qf-border-1);
  display: flex; flex-direction: column; gap: 18px;
  transition: border-color 200ms, transform 200ms;
}
.promise-card:hover { border-color: var(--qf-primary-300); }
.promise-card .head { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.promise-card .id {
  font-family: var(--qf-font-mono); font-size: 11px;
  color: var(--qf-primary-700); letter-spacing: 0.06em;
}
.promise-card h3 { font-size: 22px; }
.promise-card p { font-size: 14px; }
.promise-card .verified {
  display: inline-flex; gap: 6px; align-items: center;
  font-size: 11px; font-weight: 600; letter-spacing: 0.10em;
  text-transform: uppercase; color: var(--qf-success);
}
.promise-card .verified .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--qf-success); }
[data-theme="dark"] .promise-card { background: var(--qf-secondary-800); border-color: rgba(255,255,255,0.06); }

/* ---------- Pricing card ---------- */
.pricing-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px;
  max-width: 800px; margin: 0 auto;
}
@media (max-width: 720px) { .pricing-grid { grid-template-columns: 1fr; } }
.price-card {
  padding: 32px;
  border-radius: 24px;
  border: 1px solid var(--qf-border-2);
  background: var(--qf-surface-raised);
  display: flex; flex-direction: column; gap: 16px;
}
.price-card.featured {
  background: var(--qf-grad-pearl-radial); color: #fff;
  border: 0; box-shadow: var(--qf-shadow-e4);
}
.price-card.featured h3, .price-card.featured .price { color: #fff; }
.price-card.featured .meta { color: rgba(255,255,255,0.80); }
.price-card .price { font-size: 36px; font-weight: 600; letter-spacing: -0.02em; color: var(--qf-fg-1); font-family: var(--qf-font-mono); font-variant-numeric: tabular-nums; }
.price-card .price-usd { font-size: 12px; color: var(--qf-fg-3); margin-left: 8px; font-family: var(--qf-font-mono); }
.price-card .meta { font-size: 13px; color: var(--qf-fg-3); }
.price-card ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }
.price-card ul li { font-size: 14px; color: var(--qf-fg-2); padding-left: 22px; position: relative; }
.price-card ul li::before { content: '✓'; position: absolute; left: 0; color: var(--qf-success); font-weight: 600; }
.price-card.featured ul li { color: rgba(255,255,255,0.92); }
.price-card.featured ul li::before { color: rgba(253,216,211,1); }
[data-theme="dark"] .price-card { background: var(--qf-secondary-800); border-color: rgba(255,255,255,0.10); }

/* ---------- Page header (non-hero pages) ---------- */
.page-header {
  padding: 88px 0 56px;
  border-bottom: 1px solid var(--qf-border-1);
}
.page-header .eyebrow { margin-bottom: 14px; }
.page-header h1 {
  font-size: clamp(36px, 5vw, 60px);
  letter-spacing: -0.025em;
}
.page-header p.lede {
  margin-top: 18px; font-size: 18px; color: var(--qf-fg-2); max-width: 640px;
  line-height: 1.5;
}

/* ---------- Tabular SDK / data table ---------- */
.t-table {
  width: 100%; border-collapse: collapse;
  font-size: 13px;
}
.t-table th {
  text-align: left; padding: 14px 16px;
  font-size: 11px; font-weight: 600; letter-spacing: 0.10em;
  text-transform: uppercase; color: var(--qf-fg-3);
  border-bottom: 1px solid var(--qf-border-2);
}
.t-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--qf-border-1);
  vertical-align: top;
  color: var(--qf-fg-2);
}
.t-table td.k { color: var(--qf-fg-1); font-weight: 500; }
.t-table td .mono { font-size: 12px; color: var(--qf-primary-700); }

/* ---------- Misc ---------- */
.kbd {
  font-family: var(--qf-font-mono);
  font-size: 11px; font-weight: 500;
  padding: 2px 6px; border-radius: 6px;
  background: var(--qf-primary-50); color: var(--qf-primary-700);
}
.skip-link {
  position: absolute; left: -9999px;
}
.skip-link:focus { left: 16px; top: 16px; padding: 8px 14px; background: var(--qf-fg-1); color: #fff; z-index: 100; border-radius: 8px; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0ms !important; animation-duration: 0ms !important; }
  html { scroll-behavior: auto; }
}