/* ============================================================
   SnipVault marketing site — design system + layout
   Self-contained, no build step, no external fonts/requests.
   ============================================================ */

/* ---------- Theme tokens ---------- */
:root {
  /* Light palette (base) */
  --bg: #ffffff;
  --bg-2: #f6f7f9;
  --card: #ffffff;
  --fg: #14161c;
  --muted: #5b616e;
  --border: #e7e9ee;
  --accent: #7c3aed;
  --accent-2: #8b5cf6;
  --accent-weak: rgba(124, 58, 237, 0.10);
  --on-accent: #ffffff;
  --code-bg: #f3f3f6;
  --shadow: 0 1px 2px rgba(16,18,26,.04), 0 12px 32px rgba(16,18,26,.08);
  --shadow-lg: 0 24px 70px rgba(16,18,26,.18);

  --maxw: 1120px;
  --radius: 16px;
  --radius-sm: 10px;
  --font: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Cascadia Code", Menlo, Consolas, monospace;
}

/* Dark palette: applied when the OS prefers dark (and the user hasn't forced
   light), OR when the toggle explicitly sets data-theme="dark". */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0c11;
    --bg-2: #101219;
    --card: #14161f;
    --fg: #e8eaf0;
    --muted: #99a0ad;
    --border: #242836;
    --accent: #8b5cf6;
    --accent-2: #a78bfa;
    --accent-weak: rgba(139, 92, 246, 0.14);
    --on-accent: #ffffff;
    --code-bg: #0d0f16;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 14px 40px rgba(0,0,0,.45);
    --shadow-lg: 0 30px 80px rgba(0,0,0,.55);
  }
}
:root[data-theme="dark"] {
  --bg: #0b0c11;
  --bg-2: #101219;
  --card: #14161f;
  --fg: #e8eaf0;
  --muted: #99a0ad;
  --border: #242836;
  --accent: #8b5cf6;
  --accent-2: #a78bfa;
  --accent-weak: rgba(139, 92, 246, 0.14);
  --on-accent: #ffffff;
  --code-bg: #0d0f16;
  --shadow: 0 1px 2px rgba(0,0,0,.4), 0 14px 40px rgba(0,0,0,.45);
  --shadow-lg: 0 30px 80px rgba(0,0,0,.55);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--fg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.12; letter-spacing: -0.02em; margin: 0; }
p { margin: 0; }
code, kbd, pre, .mono { font-family: var(--mono); }

.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: 24px; }
.mut { color: var(--muted); }
.small { font-size: .875rem; }
.center { text-align: center; margin-inline: auto; }
.grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.skip-link {
  position: absolute; left: -999px; top: 8px; z-index: 200;
  background: var(--accent); color: var(--on-accent); padding: 8px 14px; border-radius: 8px;
}
.skip-link:focus { left: 12px; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 6px; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  font-weight: 600; font-size: .95rem; border-radius: 999px; cursor: pointer;
  padding: .7rem 1.15rem; border: 1px solid transparent; transition: transform .12s ease, background .15s ease, border-color .15s ease, box-shadow .15s ease;
  white-space: nowrap;
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--accent); color: var(--on-accent); box-shadow: 0 6px 20px var(--accent-weak); }
.btn--primary:hover { background: var(--accent-2); }
.btn--ghost { background: transparent; color: var(--fg); border-color: var(--border); }
.btn--ghost:hover { background: var(--bg-2); border-color: var(--muted); }
.btn--lg { padding: .9rem 1.5rem; font-size: 1rem; }
.btn--sm { padding: .5rem .9rem; font-size: .85rem; }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 38px; height: 38px; border-radius: 10px; cursor: pointer;
  background: transparent; color: var(--fg); border: 1px solid var(--border);
}
.icon-btn:hover { background: var(--bg-2); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}
.nav.is-scrolled { border-bottom-color: var(--border); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .55rem; font-weight: 700; letter-spacing: -.02em; }
.brand__glyph {
  font-family: var(--mono); font-weight: 700; font-size: .9rem; color: var(--on-accent);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  width: 30px; height: 30px; border-radius: 9px; display: grid; place-items: center;
}
.brand__name { font-size: 1.05rem; }
.nav__links { display: flex; gap: 1.4rem; font-size: .93rem; }
.nav__links a { color: var(--muted); transition: color .15s ease; }
.nav__links a:hover { color: var(--fg); }
.nav__actions { display: flex; align-items: center; gap: .6rem; }
.nav__burger { display: none; }
.i-moon { display: none; }
:root[data-theme="dark"] .i-sun { display: none; }
:root[data-theme="dark"] .i-moon { display: inline; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .i-sun { display: none; }
  :root:not([data-theme="light"]) .i-moon { display: inline; }
}
.nav__mobile { display: none; }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: clamp(3rem, 8vw, 6rem) 0 clamp(2rem, 5vw, 4rem); }
.hero::before {
  content: ""; position: absolute; inset: -30% 0 auto 0; height: 640px; z-index: -1;
  background:
    radial-gradient(60% 60% at 78% 8%, var(--accent-weak), transparent 60%),
    radial-gradient(50% 50% at 10% 0%, color-mix(in srgb, var(--accent) 8%, transparent), transparent 60%);
  pointer-events: none;
}
.hero__inner { display: grid; grid-template-columns: 1.05fr .95fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.eyebrow { text-transform: uppercase; letter-spacing: .12em; font-size: .74rem; font-weight: 700; color: var(--accent); margin-bottom: .9rem; }
.hero h1 { font-size: clamp(2.2rem, 5.4vw, 3.6rem); font-weight: 800; }
.lede { color: var(--muted); font-size: clamp(1.02rem, 1.6vw, 1.18rem); margin-top: 1.1rem; max-width: 34ch; }
.lede.center { max-width: 46ch; }
.hero__cta { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 1.6rem; }
.hero__cta--center { justify-content: center; }
.chips { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; margin: 1.5rem 0 0; }
.chips li {
  font-size: .8rem; font-weight: 600; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: .3rem .7rem; background: var(--card);
}

/* ---------- App-window mockup ---------- */
.hero__art { position: relative; }
.win {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); overflow: hidden; position: relative;
}
.win__bar { display: flex; align-items: center; gap: .5rem; padding: .7rem .9rem; border-bottom: 1px solid var(--border); background: var(--bg-2); }
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot--r { background: #ff5f57; } .dot--y { background: #febc2e; } .dot--g { background: #28c840; }
.win__search { margin-left: .6rem; flex: 1; font-size: .82rem; color: var(--muted); background: var(--card); border: 1px solid var(--border); border-radius: 8px; padding: .35rem .6rem; }
.win__search kbd { border: 1px solid var(--border); border-radius: 5px; padding: 0 .3rem; font-size: .72rem; }
.win__body { padding: 1rem; display: grid; gap: .8rem; }
.pcard {
  border: 1px solid var(--border); border-left: 4px solid var(--c, var(--accent));
  border-radius: 12px; padding: .8rem .9rem; background: var(--bg);
}
.pcard__title { font-weight: 700; font-size: .95rem; }
.pcard__code { color: var(--muted); font-size: .82rem; margin: .35rem 0 .55rem; }
.pcard__code.mono { font-family: var(--mono); }
.pcard__meta { display: flex; gap: .4rem; flex-wrap: wrap; }
.tag { font-size: .72rem; font-weight: 600; color: var(--muted); background: var(--bg-2); border-radius: 6px; padding: .12rem .45rem; }
.tag--model { color: var(--accent); background: var(--accent-weak); }
.badge { font-size: .72rem; font-weight: 700; color: var(--accent); background: var(--accent-weak); border-radius: 6px; padding: .12rem .45rem; }
.fill {
  position: absolute; right: -14px; bottom: -14px; width: 250px;
  background: var(--card); border: 1px solid var(--border); border-radius: 14px;
  box-shadow: var(--shadow-lg); padding: .85rem; display: grid; gap: .5rem;
}
.fill__head { font-weight: 700; font-size: .85rem; }
.fill__row { display: flex; align-items: center; gap: .5rem; font-size: .78rem; }
.fill__row .mono { color: var(--accent); white-space: nowrap; }
.fill__row input, .fill__row select {
  flex: 1; min-width: 0; font: inherit; font-size: .78rem; color: var(--fg);
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: .3rem .45rem;
}
.fill__btn { width: 100%; margin-top: .15rem; }

/* ---------- Bands / sections ---------- */
.band { border-block: 1px solid var(--border); background: var(--bg-2); padding: 1.6rem 0; }
.flow { display: flex; align-items: center; justify-content: center; gap: 1.2rem; flex-wrap: wrap; }
.flow__item { display: flex; align-items: center; gap: .6rem; color: var(--muted); font-weight: 500; max-width: 22ch; }
.flow__ico { font-size: 1.3rem; }
.flow__arrow { color: var(--accent); font-weight: 700; font-size: 1.2rem; }

.section { padding: clamp(3.5rem, 8vw, 6rem) 0; }
.section--muted { background: var(--bg-2); border-block: 1px solid var(--border); }
.section--accent { background: linear-gradient(180deg, var(--accent-weak), transparent); border-top: 1px solid var(--border); }
.section--cta { text-align: center; }
.section__head { max-width: 40ch; margin-bottom: 2.6rem; }
.section__head h2 { font-size: clamp(1.7rem, 3.4vw, 2.4rem); font-weight: 800; margin-top: .5rem; }
.section__head--sm { margin: 3.5rem auto 1.6rem; text-align: center; }
.section__head--sm h3 { font-size: 1.3rem; font-weight: 700; color: var(--muted); }

/* ---------- Feature rows ---------- */
.feat { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; padding: 2rem 0; }
.feat--rev .feat__text { order: 2; }
.feat h3 { font-size: clamp(1.35rem, 2.6vw, 1.7rem); font-weight: 700; }
.feat p { color: var(--muted); margin-top: .8rem; font-size: 1.02rem; }
.feat code, .privacy code, .faq code, .lede code { font-family: var(--mono); font-size: .86em; background: var(--code-bg); border: 1px solid var(--border); border-radius: 6px; padding: .05rem .35rem; color: var(--fg); }

.panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 1.1rem; }
.panel__title { font-weight: 700; font-size: .9rem; margin-bottom: .7rem; }
.frow { display: flex; align-items: center; gap: .7rem; margin-bottom: .5rem; font-size: .85rem; }
.frow .mono { color: var(--accent); min-width: 72px; }
.inp { flex: 1; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: .35rem .55rem; }
.inp--sel { color: var(--fg); }
.preview { margin-top: .7rem; background: var(--bg-2); border: 1px solid var(--border); border-radius: 10px; padding: .7rem; font-size: .88rem; }
.runrow, .linkrow { display: flex; align-items: center; gap: .45rem; flex-wrap: wrap; font-size: .85rem; color: var(--muted); margin-bottom: .8rem; }
.pill { color: var(--fg); background: var(--bg-2); border: 1px solid var(--border); border-radius: 999px; padding: .2rem .6rem; font-weight: 600; font-size: .78rem; }
.lnk { color: var(--accent); font-weight: 600; }
.swatches { display: flex; align-items: center; gap: .45rem; }
.sw { width: 22px; height: 22px; border-radius: 50%; background: var(--c); display: inline-block; }
.sw--on { outline: 2px solid var(--accent); outline-offset: 2px; }
.panel--diff { font-family: var(--mono); font-size: .84rem; }
.diff { padding: .18rem .5rem; border-radius: 6px; white-space: pre-wrap; }
.diff--add { background: rgba(34,197,94,.14); color: #16a34a; }
.diff--del { background: rgba(239,68,68,.14); color: #dc2626; }
.panel__foot { margin-top: .6rem; font-family: var(--font); font-size: .82rem; }

/* ---------- And-much-more grid ---------- */
.grid { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(4, 1fr); gap: 1rem; }
.cell { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem; transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease; }
.cell:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 40%, var(--border)); box-shadow: var(--shadow); }
.cell__ico { font-size: 1.3rem; display: block; margin-bottom: .5rem; }
.cell b { display: block; font-size: .98rem; }
.cell p { color: var(--muted); font-size: .86rem; margin-top: .25rem; }

/* ---------- Privacy ---------- */
.privacy { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.privacy__list { list-style: none; padding: 0; margin: 0; display: grid; gap: .7rem; }
.privacy__list li { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: .85rem 1rem; font-size: .95rem; color: var(--muted); }
.privacy__list b { color: var(--fg); }

/* ---------- Sync ---------- */
.sync { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(1.5rem, 4vw, 3.5rem); align-items: center; }
.ticks { list-style: none; padding: 0; margin: 1.2rem 0 0; display: grid; gap: .5rem; }
.ticks li { padding-left: 1.7rem; position: relative; color: var(--muted); }
.ticks li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 800; }
.term { background: var(--code-bg); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden; }
.term__bar { display: flex; align-items: center; gap: .45rem; padding: .55rem .7rem .55rem .8rem; border-bottom: 1px solid var(--border); background: var(--bg-2); }
.term__title { margin-left: .5rem; font-size: .78rem; color: var(--muted); }
.term__copy {
  margin-left: auto; display: inline-flex; align-items: center; gap: .35rem;
  font: inherit; font-size: .76rem; font-weight: 600; cursor: pointer;
  color: var(--muted); background: var(--card); border: 1px solid var(--border);
  border-radius: 8px; padding: .28rem .6rem; transition: color .15s ease, border-color .15s ease, background .15s ease;
}
.term__copy:hover { color: var(--fg); border-color: var(--muted); }
.term__body { margin: 0; padding: .95rem 1.1rem 1.05rem; font-family: var(--mono); font-size: .82rem; line-height: 1.75; }
.term__cmd { display: block; color: var(--fg); white-space: pre-wrap; overflow-wrap: anywhere; }
.term__cmd::before { content: "$ "; color: var(--accent); font-weight: 700; }
.term__out { display: block; margin-top: .55rem; color: var(--muted); white-space: pre-wrap; }

/* ---------- Download ---------- */
.dl { text-align: center; }
.dl .section__head { max-width: 46ch; margin-inline: auto; }
.dl__os { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1rem; max-width: 620px; margin: 0 auto 1.4rem; }
.oscard { display: grid; place-items: center; gap: .25rem; text-align: center; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.6rem 1rem; transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease; }
.oscard:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); box-shadow: var(--shadow); }
.oscard__ico { font-size: 1.8rem; }
.oscard b { font-size: 1.05rem; }
.oscard.is-you { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-weak); }

/* ---------- FAQ ---------- */
.acc { display: grid; gap: .6rem; }
.acc details { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: .2rem 1rem; }
.acc summary { cursor: pointer; font-weight: 600; padding: .85rem 0; list-style: none; display: flex; justify-content: space-between; align-items: center; }
.acc summary::-webkit-details-marker { display: none; }
.acc summary::after { content: "+"; color: var(--accent); font-weight: 800; font-size: 1.2rem; }
.acc details[open] summary::after { content: "–"; }
.acc details p { color: var(--muted); padding: 0 0 .95rem; margin: 0; max-width: 62ch; }

/* ---------- CTA ---------- */
.cta h2 { font-size: clamp(2rem, 5vw, 3rem); font-weight: 800; }

/* ---------- Footer ---------- */
.footer { border-top: 1px solid var(--border); background: var(--bg-2); padding: 3rem 0 2rem; }
.footer__inner { display: grid; grid-template-columns: 1.4fr 2fr; gap: 2rem; }
.footer__brand .brand { margin-bottom: .6rem; }
.footer__cols { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.footer__cols h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: .7rem; }
.footer__cols a { display: block; color: var(--muted); padding: .22rem 0; font-size: .92rem; }
.footer__cols a:hover { color: var(--fg); }
.footer__base { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; padding-top: 1.4rem; border-top: 1px solid var(--border); }

/* ---------- Scroll reveal ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.is-in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .nav__links { display: none; }
  .nav__burger { display: inline-flex; }
  .nav__mobile { display: none; flex-direction: column; gap: .3rem; padding: .8rem 24px 1rem; border-bottom: 1px solid var(--border); background: var(--bg); }
  .nav__mobile.is-open { display: flex; }
  .nav__mobile a { padding: .55rem 0; color: var(--muted); }
  .nav__mobile a.btn { color: var(--on-accent); justify-content: center; margin-top: .4rem; }

  .hero__inner, .feat, .feat--rev .feat__text, .privacy, .sync { grid-template-columns: 1fr; }
  .feat--rev .feat__text { order: 0; }
  .hero__art { margin-top: 1.5rem; }
  .fill { position: static; width: auto; margin: .8rem 1rem 1rem; box-shadow: var(--shadow); }
  .grid { grid-template-columns: repeat(2, 1fr); }
  .footer__inner { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .grid, .dl__os, .footer__cols { grid-template-columns: 1fr; }
  .flow__arrow { transform: rotate(90deg); }
  .lede { max-width: none; }
}