/* ============================================================
   Oupah — Design System
   ============================================================ */

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

/* ---- Tokens ---- */
:root {
  /* light body palette */
  --bg: #f5f8fb;
  --surface: #ffffff;
  --surface-2: #eef2f7;
  --border: #e2e8f0;
  --border-strong: #d2dae4;
  --ink: #0c1320;
  --ink-soft: #51606f;
  --ink-faint: #8995a4;

  /* dark palette */
  --dark: #080b11;
  --dark-2: #0c111a;
  --dark-surface: #111927;
  --dark-surface-2: #16202f;
  --dark-border: rgba(255,255,255,0.10);
  --dark-border-strong: rgba(255,255,255,0.18);
  --on-dark: #e9f0f8;
  --on-dark-soft: #98a6b8;
  --on-dark-faint: #61708380;

  /* accents (tweakable) */
  --accent: #2bb3ff;
  --accent-2: #5cc8ff;
  --accent-ink: #0a86d8;     /* readable accent on light */
  --accent-soft: #e2f3ff;
  --green: #27c499;
  --green-ink: #128c68;
  --green-soft: #def6ee;
  --warn: #ff6b5e;
  --warn-soft: #ffe6e3;

  --glow: color-mix(in oklab, var(--accent) 55%, transparent);

  /* shape */
  --r-xl: 22px;
  --r-lg: 16px;
  --r-md: 11px;
  --r-sm: 7px;

  --shadow-sm: 0 1px 2px rgba(13,20,32,.06), 0 1px 1px rgba(13,20,32,.04);
  --shadow-md: 0 8px 24px -12px rgba(13,20,32,.18), 0 2px 6px rgba(13,20,32,.05);
  --shadow-lg: 0 30px 60px -24px rgba(8,17,32,.32), 0 8px 20px -12px rgba(8,17,32,.18);
  --shadow-glow: 0 0 0 1px color-mix(in oklab, var(--accent) 40%, transparent), 0 18px 50px -18px var(--glow);

  --maxw: 1180px;
  --gut: clamp(20px, 5vw, 56px);

  --font-display: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'Hanken Grotesk', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
::selection { background: color-mix(in oklab, var(--accent) 30%, transparent); }

/* ---- Layout ---- */
.wrap { max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gut); }
.section { padding-block: clamp(64px, 9vw, 116px); position: relative; }
.section.tight { padding-block: clamp(48px, 6vw, 80px); }
.grid { display: grid; gap: 22px; }

/* ---- Type ---- */
h1,h2,h3,h4 { font-family: var(--font-display); font-weight: 600; line-height: 1.06; letter-spacing: -0.02em; margin: 0; color: var(--ink); }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.1rem); font-weight: 700; letter-spacing: -0.035em; }
h2 { font-size: clamp(1.9rem, 3.6vw, 2.9rem); letter-spacing: -0.03em; }
h3 { font-size: clamp(1.2rem, 1.8vw, 1.45rem); }
p { margin: 0; }
.lead { font-size: clamp(1.06rem, 1.5vw, 1.28rem); color: var(--ink-soft); line-height: 1.6; }
.muted { color: var(--ink-soft); }
.faint { color: var(--ink-faint); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent-ink);
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-weight: 500;
}
.eyebrow::before {
  content: ""; width: 7px; height: 7px; border-radius: 2px;
  background: var(--accent); box-shadow: 0 0 0 3px color-mix(in oklab, var(--accent) 22%, transparent);
}
.section-head { max-width: 720px; }
.section-head h2 { margin-top: 16px; }
.section-head .lead { margin-top: 16px; }

.hl { color: var(--accent-ink); }
.grad-text {
  background: linear-gradient(100deg, var(--accent), var(--green));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--font-display); font-weight: 600; font-size: .98rem;
  padding: 13px 22px; border-radius: var(--r-md); border: 1px solid transparent;
  transition: transform .18s cubic-bezier(.2,.8,.3,1), box-shadow .25s, background .2s, border-color .2s, color .2s;
  white-space: nowrap; line-height: 1;
}
.btn svg { width: 17px; height: 17px; }
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #04121f; box-shadow: var(--shadow-glow);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px var(--accent), 0 24px 60px -16px var(--glow); }
.btn-ghost {
  background: var(--surface); color: var(--ink); border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.btn-lg { padding: 16px 28px; font-size: 1.05rem; }

/* on-dark button variants */
.on-dark .btn-ghost, .btn-ghost.on { background: rgba(255,255,255,.04); color: var(--on-dark); border-color: var(--dark-border-strong); }
.on-dark .btn-ghost:hover, .btn-ghost.on:hover { background: rgba(255,255,255,.09); border-color: var(--accent); }

.btn-link { color: var(--accent-ink); font-family: var(--font-display); font-weight: 600; display: inline-flex; align-items: center; gap: 7px; }
.btn-link svg { width: 16px; height: 16px; transition: transform .2s; }
.btn-link:hover svg { transform: translateX(4px); }

/* ---- Chips / badges ---- */
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: .76rem; letter-spacing: .02em;
  padding: 7px 12px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--surface); color: var(--ink-soft);
}
.chip .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 3px var(--green-soft); }
.on-dark .chip { background: rgba(255,255,255,.04); border-color: var(--dark-border); color: var(--on-dark-soft); }

/* ---- Cards ---- */
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--r-lg);
  padding: 26px; box-shadow: var(--shadow-sm);
  transition: transform .22s cubic-bezier(.2,.8,.3,1), box-shadow .25s, border-color .25s;
}
.card.hover:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--border-strong); }
.card h3 { margin-bottom: 8px; }
.card p { color: var(--ink-soft); font-size: .98rem; }

/* icon tile */
.itile {
  width: 46px; height: 46px; border-radius: var(--r-md);
  display: grid; place-items: center; margin-bottom: 18px;
  background: var(--accent-soft); color: var(--accent-ink);
  border: 1px solid color-mix(in oklab, var(--accent) 26%, var(--border));
}
.itile svg { width: 23px; height: 23px; }
.itile.green { background: var(--green-soft); color: var(--green-ink); border-color: color-mix(in oklab, var(--green) 28%, var(--border)); }

/* ---- Dark sections ---- */
.dark-bg {
  background: var(--dark); color: var(--on-dark);
}
.dark-bg h1, .dark-bg h2, .dark-bg h3 { color: var(--on-dark); }
.dark-bg .lead, .dark-bg .muted { color: var(--on-dark-soft); }
.dark-bg .eyebrow { color: var(--accent-2); }
.dark-bg .hl { color: var(--accent-2); }

/* grid + glow backdrop helper */
.tech-bg { position: relative; isolation: isolate; }
.tech-bg::before {
  content: ""; position: absolute; inset: 0; z-index: -2;
  background-image:
    linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 54px 54px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
  mask-image: radial-gradient(120% 90% at 70% 0%, #000 30%, transparent 78%);
}
.tech-bg::after {
  content: ""; position: absolute; z-index: -1; inset: 0;
  background:
    radial-gradient(60% 50% at 78% 8%, color-mix(in oklab, var(--accent) 26%, transparent), transparent 70%),
    radial-gradient(50% 45% at 12% 88%, color-mix(in oklab, var(--green) 18%, transparent), transparent 70%);
  opacity: .7; pointer-events: none;
}

/* ---- Reveal ----
   CRITICAL: opacity is ALWAYS 1 and is never animated. Preview/offscreen iframes
   freeze CSS animations at their first frame, so any fade-from-0 would leave content
   stuck invisible. The entrance animates TRANSFORM ONLY — frozen worst-case is a tiny
   harmless offset; content is always readable. Real browsers get a smooth slide-up. */
.reveal { opacity: 1; }
@media (prefers-reduced-motion: no-preference) {
  .reveal.in { animation: revealIn .6s cubic-bezier(.2,.8,.3,1) both; }
  .reveal.in[data-d="1"] { animation-delay: .06s; }
  .reveal.in[data-d="2"] { animation-delay: .12s; }
  .reveal.in[data-d="3"] { animation-delay: .18s; }
  .reveal.in[data-d="4"] { animation-delay: .24s; }
  .reveal.in[data-d="5"] { animation-delay: .30s; }
}
@keyframes revealIn {
  from { transform: translateY(10px); }
  to   { transform: none; }
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 60;
  background: color-mix(in oklab, var(--dark) 82%, transparent);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--dark-border);
}
.nav { display: flex; align-items: center; gap: 28px; height: 66px; }
.brand { display: flex; align-items: center; gap: 11px; color: var(--on-dark); font-family: var(--font-display); font-weight: 700; font-size: 1.18rem; letter-spacing: -.02em; }
.brand .mark { width: 32px; height: 32px; flex: none; }
.brand .brand-suffix { color: var(--accent); font-style: normal; margin-left: 4px; }
.nav-links { display: flex; align-items: center; gap: 4px; margin-left: 8px; }
.nav-links a {
  font-size: .92rem; color: var(--on-dark-soft); padding: 8px 13px; border-radius: 8px;
  font-weight: 500; transition: color .18s, background .18s; position: relative;
}
.nav-links a:hover { color: var(--on-dark); background: rgba(255,255,255,.05); }
.nav-links a.active { color: var(--on-dark); }
.nav-links a.active::after {
  content: ""; position: absolute; left: 13px; right: 13px; bottom: 2px; height: 2px;
  background: var(--accent); border-radius: 2px;
}
.nav-right { margin-left: auto; display: flex; align-items: center; gap: 12px; }

.lang-toggle { display: inline-flex; border: 1px solid var(--dark-border); border-radius: 8px; overflow: hidden; font-family: var(--font-mono); }
.lang-toggle button { background: transparent; color: var(--on-dark-soft); border: none; padding: 6px 10px; font-size: .76rem; font-weight: 500; letter-spacing: .04em; transition: background .15s, color .15s; }
.lang-toggle button.on { background: var(--accent); color: #04121f; }

.nav .btn-primary { padding: 10px 18px; font-size: .9rem; }
.burger { display: none; background: transparent; border: 1px solid var(--dark-border); border-radius: 8px; width: 40px; height: 38px; color: var(--on-dark); }
.burger svg { width: 20px; height: 20px; margin: auto; }

@media (max-width: 940px) {
  .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; flex-direction: column; gap: 2px; padding: 14px var(--gut) 22px; background: var(--dark-2); border-bottom: 1px solid var(--dark-border); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 13px; font-size: 1rem; }
  .nav-links a.active::after { left: 13px; right: auto; width: 18px; bottom: 8px; }
  .burger { display: grid; }
  .nav .btn-primary.desktop-cta { display: none; }
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer { background: var(--dark); color: var(--on-dark-soft); padding-block: 64px 34px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
.site-footer h4 { color: var(--on-dark); font-family: var(--font-mono); font-size: .74rem; letter-spacing: .18em; text-transform: uppercase; font-weight: 500; margin-bottom: 16px; }
.site-footer a { display: block; padding: 5px 0; color: var(--on-dark-soft); font-size: .95rem; transition: color .15s; }
.site-footer a:hover { color: var(--accent-2); }
.site-footer .brand { display: flex; align-items: center; margin-bottom: 14px; }
.foot-note { color: var(--on-dark-faint); font-size: .9rem; max-width: 280px; }
.foot-bottom { margin-top: 46px; padding-top: 22px; border-top: 1px solid var(--dark-border); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: .84rem; color: var(--on-dark-faint); font-family: var(--font-mono); }
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 460px) { .footer-grid { grid-template-columns: 1fr; } }

/* ============================================================
   Style switcher (variations)
   ============================================================ */
.styler { position: fixed; right: 18px; bottom: 18px; z-index: 80; font-family: var(--font-body); }
.styler-btn {
  width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--border-strong);
  background: var(--surface); color: var(--ink); box-shadow: var(--shadow-md); display: grid; place-items: center;
  transition: transform .2s; 
}
.styler-btn:hover { transform: rotate(20deg) scale(1.05); }
.styler-btn svg { width: 22px; height: 22px; }
.styler-panel {
  position: absolute; right: 0; bottom: 60px; width: 246px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--r-lg); box-shadow: var(--shadow-lg);
  padding: 18px; opacity: 0; transform: translateY(8px) scale(.98); pointer-events: none; transition: .2s;
}
.styler.open .styler-panel { opacity: 1; transform: none; pointer-events: auto; }
.styler-panel .lbl { font-family: var(--font-mono); font-size: .68rem; letter-spacing: .16em; text-transform: uppercase; color: var(--ink-faint); margin: 4px 0 9px; }
.styler-panel .lbl:not(:first-child) { margin-top: 18px; }
.swatches { display: flex; gap: 9px; }
.swatch { width: 34px; height: 34px; border-radius: 9px; border: 2px solid var(--border); cursor: pointer; transition: transform .15s; position: relative; }
.swatch:hover { transform: scale(1.08); }
.swatch.on { border-color: var(--ink); }
.swatch.on::after { content: "✓"; position: absolute; inset: 0; display: grid; place-items: center; color: #fff; font-size: .8rem; font-weight: 700; }
.seg { display: flex; gap: 6px; }
.seg button { flex: 1; padding: 9px; border-radius: 9px; border: 1px solid var(--border); background: var(--surface-2); color: var(--ink-soft); font-size: .82rem; font-weight: 600; transition: .15s; }
.seg button.on { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ============================================================
   Reusable content blocks
   ============================================================ */
/* problem ticker / pills */
.pills { display: flex; flex-wrap: wrap; gap: 10px; }
.pill {
  display: inline-flex; align-items: center; gap: 9px; padding: 9px 14px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); font-size: .92rem; color: var(--ink-soft);
}
.pill .x { color: var(--warn); font-weight: 700; }
.on-dark .pill, .dark-bg .pill { background: rgba(255,255,255,.03); border-color: var(--dark-border); color: var(--on-dark-soft); }

/* check list */
.checks { display: grid; gap: 13px; }
.checks li { display: flex; gap: 13px; align-items: flex-start; list-style: none; }
.checks .ck { flex: none; width: 24px; height: 24px; border-radius: 7px; background: var(--green-soft); color: var(--green-ink); display: grid; place-items: center; margin-top: 1px; }
.checks .ck svg { width: 14px; height: 14px; }
.dark-bg .checks .ck { background: color-mix(in oklab, var(--green) 22%, transparent); color: var(--green); }
ul.clean { list-style: none; padding: 0; margin: 0; }

/* section divider gradient line */
.hr-grad { height: 1px; border: 0; background: linear-gradient(90deg, transparent, var(--border-strong), transparent); margin: 0; }

/* feature grid helper */
.cols-2 { grid-template-columns: repeat(2, 1fr); }
.cols-3 { grid-template-columns: repeat(3, 1fr); }
.cols-4 { grid-template-columns: repeat(4, 1fr); }
.cols-5 { grid-template-columns: repeat(5, 1fr); }
@media (max-width: 980px){ .cols-3,.cols-4,.cols-5 { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 640px){ .cols-2,.cols-3,.cols-4,.cols-5 { grid-template-columns: 1fr; } }

/* CTA band */
.cta-band { position: relative; overflow: hidden; border-radius: var(--r-xl); padding: clamp(36px,5vw,64px); }
.cta-band .btn-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }

.btn-row { display: flex; gap: 14px; flex-wrap: wrap; }
@media (max-width: 540px) {
  .btn-row { flex-direction: column; align-items: stretch; }
  .btn-row .btn { width: 100%; justify-content: center; }
}

/* stat */
.stat .n { font-family: var(--font-display); font-weight: 700; font-size: clamp(2rem,3vw,2.6rem); letter-spacing: -.03em; color: var(--ink); }
.dark-bg .stat .n { color: var(--on-dark); }
.stat .n .u { color: var(--accent-ink); }
.dark-bg .stat .n .u { color: var(--accent-2); }
.stat .k { color: var(--ink-soft); font-size: .92rem; margin-top: 4px; }
.dark-bg .stat .k { color: var(--on-dark-soft); }

/* page hero (interior) */
.phero { padding-top: clamp(56px, 8vw, 96px); padding-bottom: clamp(56px, 8vw, 92px); }
.phero h1 { max-width: 16ch; }
.phero .lead { max-width: 56ch; margin-top: 20px; }
.phero .btn-row { margin-top: 30px; }

/* accordion (faq) */
.faq { border-top: 1px solid var(--border); }
.faq details { border-bottom: 1px solid var(--border); }
.faq summary { list-style: none; cursor: pointer; padding: 22px 4px; display: flex; justify-content: space-between; align-items: center; gap: 18px; font-family: var(--font-display); font-weight: 600; font-size: 1.1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary .pm { flex: none; width: 26px; height: 26px; border-radius: 50%; border: 1px solid var(--border-strong); display: grid; place-items: center; transition: .25s; color: var(--accent-ink); }
.faq details[open] summary .pm { transform: rotate(45deg); background: var(--accent); color: #fff; border-color: var(--accent); }
.faq .ans { padding: 0 4px 24px; color: var(--ink-soft); max-width: 70ch; }

/* tag row above section heads */
.krow { display: flex; gap: 10px; flex-wrap: wrap; }

/* ============================================================
   Variation presets (style switcher)
   ============================================================ */
html[data-accent="blue"] {
  --accent: #4f7cff; --accent-2: #82a0ff; --accent-ink: #3a5fe0; --accent-soft: #e9edff;
}
html[data-accent="teal"] {
  --accent: #22d3ee; --accent-2: #67e3f4; --accent-ink: #0a9fb8; --accent-soft: #defafe;
}
/* ambiance: minimal = calmer textures, softer chrome */
html[data-amb="minimal"] .tech-bg::before { opacity: .45; }
html[data-amb="minimal"] .tech-bg::after { opacity: .4; }
html[data-amb="minimal"] .eyebrow::before { box-shadow: none; }
html[data-amb="minimal"] .btn-primary { box-shadow: 0 0 0 1px color-mix(in oklab, var(--accent) 30%, transparent), 0 10px 30px -16px var(--glow); }
html[data-amb="minimal"] { --r-xl: 14px; --r-lg: 11px; --r-md: 9px; }
html[data-amb="minimal"] .grad-text { background: none; -webkit-background-clip: border-box; background-clip: border-box; color: var(--accent-ink); }
html[data-amb="minimal"] .dark-bg .grad-text { color: var(--accent-2); }