/* Voltage — site styles. Mirrors the app's VoltTheme: icy grounds, navy ink,
   spark yellow, chunky ink borders with offset shadows. */

:root {
  --cream: #EAF4FE;
  --cream-deep: #DAEAF8;
  --card: #FFFFFF;
  --ink: #14224A;
  --ink-soft: #4A5878;
  --ink-faint: #8494B0;
  --navy: #232E7A;
  --spark: #FAC947;
  --spark-deep: #ED941F;
  --butter: #FFF2C2;
  --sky: #C7E6FF;
  --mint: #C2EDD6;
  --lilac: #DBD9FF;
  --border: var(--ink);
  --radius: 18px;
  --display: "Archivo Black", "Arial Black", system-ui, sans-serif;
  --body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --cream: #0D1221;
    --cream-deep: #1A2135;
    --card: #1A2238;
    --ink: #EEF1FA;
    --ink-soft: #B4BED6;
    --ink-faint: #7E89A6;
    --butter: #29251A;
    --sky: #13233B;
    --mint: #11291F;
    --lilac: #1E1C38;
    --border: #3A4870;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font: 400 17px/1.6 var(--body);
}

a { color: inherit; text-decoration-thickness: 2px; text-underline-offset: 3px; text-decoration-color: var(--spark-deep); }
a:hover { text-decoration-color: var(--spark); }

img { max-width: 100%; height: auto; display: block; }

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
.prose-wrap { max-width: 760px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header { padding: 18px 0; }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--display); font-size: 22px; letter-spacing: .01em; }
.brand img { width: 36px; height: 36px; border-radius: 9px; border: 2px solid var(--border); }
.nav { display: flex; gap: 18px; font-weight: 600; font-size: 15px; flex-wrap: wrap; }
.nav a { text-decoration: none; color: var(--ink-soft); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); text-decoration: underline; text-decoration-color: var(--spark); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--ink); color: var(--cream);
  font-weight: 800; font-size: 17px; text-decoration: none;
  padding: 14px 22px; border-radius: 16px;
  box-shadow: 0 5px 0 var(--spark-deep);
  transition: transform .12s ease, box-shadow .12s ease;
}
.btn:hover { transform: translateY(2px); box-shadow: 0 3px 0 var(--spark-deep); }
.btn svg { width: 20px; height: 20px; }

/* Hero */
.hero { padding: 40px 0 64px; background: linear-gradient(180deg, var(--cream) 0%, var(--butter) 100%); }
.hero .wrap { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items: center; }
.eyebrow { display: inline-block; background: var(--spark); color: #14224A; font-weight: 800; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; padding: 5px 12px; border-radius: 999px; border: 2px solid #14224A; }
h1, h2, h3 { line-height: 1.1; margin: 0; }
.hero h1 { font-family: var(--display); font-size: clamp(38px, 6vw, 64px); margin: 18px 0 16px; text-transform: uppercase; letter-spacing: -.01em; }
.hero h1 mark { background: none; color: var(--spark); -webkit-text-stroke: 2px var(--ink); paint-order: stroke fill; }
.hero p.lede { font-size: 20px; color: var(--ink-soft); max-width: 34ch; margin: 0 0 28px; }
.hero .shot { max-width: 360px; margin-left: auto; border-radius: 28px; border: 3px solid var(--border); box-shadow: 10px 10px 0 var(--ink); overflow: hidden; }
.fineprint { font-size: 14px; color: var(--ink-faint); margin-top: 14px; }

/* Feature cards */
.section { padding: 64px 0; }
.section h2 { font-family: var(--display); font-size: clamp(28px, 4vw, 40px); text-transform: uppercase; margin-bottom: 28px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card {
  background: var(--card); border: 2.5px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: 5px 5px 0 var(--border);
}
.card h3 { font-size: 19px; font-weight: 800; margin-bottom: 8px; }
.card p { margin: 0; color: var(--ink-soft); font-size: 16px; }
.card .dot { width: 42px; height: 42px; border-radius: 12px; border: 2px solid var(--border); display: grid; place-items: center; margin-bottom: 14px; font-size: 20px; }
.bg-sky { background: var(--sky); } .bg-mint { background: var(--mint); } .bg-butter { background: var(--butter); } .bg-lilac { background: var(--lilac); }

.shots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.shots img { border-radius: 22px; border: 2.5px solid var(--border); }

.pro { background: var(--navy); color: #EEF1FA; border-radius: 26px; padding: 36px; border: 3px solid #14224A; box-shadow: 8px 8px 0 var(--spark); }
.pro h2 { color: var(--spark); margin-bottom: 12px; }
.pro p { color: #C9D1EA; margin: 0 0 10px; }
.pro ul { margin: 0 0 16px; padding-left: 20px; }

/* Documents (privacy, terms, support) */
.doc { padding: 24px 0 72px; }
.doc h1 { font-family: var(--display); font-size: clamp(34px, 5vw, 48px); text-transform: uppercase; margin: 16px 0 6px; }
.doc .updated { color: var(--ink-faint); font-size: 15px; margin: 0 0 28px; }
.doc h2 { font-size: 24px; font-weight: 800; margin: 44px 0 12px; scroll-margin-top: 20px; }
.doc h3 { font-size: 18px; font-weight: 800; margin: 26px 0 8px; }
.doc p, .doc li { color: var(--ink); }
.doc ul { padding-left: 22px; }
.doc li { margin-bottom: 6px; }
.doc .summary { background: var(--card); border: 2.5px solid var(--border); border-radius: var(--radius); box-shadow: 5px 5px 0 var(--border); padding: 18px 22px; }
.doc .summary ul { margin: 8px 0 0; }
.doc .toc { background: var(--cream-deep); border-radius: 14px; padding: 14px 20px; font-size: 15px; }
.doc .toc ol { margin: 6px 0 0; padding-left: 20px; columns: 2; column-gap: 28px; }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; margin: 12px 0; display: block; overflow-x: auto; }
.doc th, .doc td { text-align: left; vertical-align: top; padding: 10px 12px; border-bottom: 1.5px solid var(--cream-deep); }
.doc th { font-weight: 800; background: var(--cream-deep); }
.callout { background: var(--butter); border: 2px solid var(--border); border-radius: 14px; padding: 14px 18px; margin: 18px 0; }
.caps { text-transform: uppercase; font-size: 15px; }

details.faq { background: var(--card); border: 2px solid var(--border); border-radius: 14px; padding: 14px 18px; margin-bottom: 12px; }
details.faq summary { font-weight: 800; cursor: pointer; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: "+"; font-size: 22px; line-height: 1; }
details.faq[open] summary::after { content: "–"; }
details.faq p { margin: 10px 0 0; color: var(--ink-soft); }

/* Footer */
.site-footer { border-top: 2px solid var(--cream-deep); padding: 32px 0 48px; font-size: 14px; color: var(--ink-faint); }
.site-footer .wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.site-footer nav { display: flex; gap: 16px; flex-wrap: wrap; }
.site-footer a { color: var(--ink-soft); }

@media (max-width: 820px) {
  .hero .wrap { grid-template-columns: 1fr; }
  .hero .shot { margin: 0 auto; max-width: 300px; }
  .cards { grid-template-columns: 1fr; }
  .shots { grid-template-columns: 1fr 1fr; }
  .shots img:nth-child(3) { display: none; }
  .doc .toc ol { columns: 1; }
  .pro { padding: 24px; }
}