/* Qvault site. System fonts only; light and dark follow the OS setting. */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f7fb;
  --bg-card: #ffffff;
  --text: #0f172a;
  --text-soft: #475569;
  --line: #e2e8f0;
  --accent: #1d4ed8;
  --accent-text: #ffffff;
  --accent-soft: #e0e8ff;
  --ok: #047857;
  --warn-bg: #fff7e6;
  --warn-line: #f2c46d;
  --code-bg: #f1f5f9;
  --redact: #0f172a;
  --shadow: 0 1px 2px rgb(15 23 42 / 6%), 0 8px 24px rgb(15 23 42 / 6%);
  --radius: 12px;
  --wrap: 1120px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1120;
    --bg-soft: #111a2e;
    --bg-card: #131d33;
    --text: #e5e9f2;
    --text-soft: #a3aec2;
    --line: #26324a;
    --accent: #7aa2ff;
    --accent-text: #0b1120;
    --accent-soft: #1b2a4d;
    --ok: #4ade80;
    --warn-bg: #2a2110;
    --warn-line: #7a5b1c;
    --code-bg: #0f1729;
    --redact: #000000;
    --shadow: 0 1px 2px rgb(0 0 0 / 30%), 0 8px 24px rgb(0 0 0 / 25%);
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 var(--font);
  overflow-wrap: break-word;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 0.5em; }
h1 { font-size: clamp(1.9rem, 4.6vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3.2vw, 2.1rem); }
h3 { font-size: 1.15rem; }
p, ul, ol { margin: 0 0 1em; }
code, kbd, pre { font-family: var(--mono); font-size: 0.88em; }
code { background: var(--code-bg); padding: 0.1em 0.35em; border-radius: 5px; overflow-wrap: anywhere; }
pre {
  background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 16px; overflow-x: auto; line-height: 1.5;
}
pre code { background: none; padding: 0; overflow-wrap: normal; }
table { border-collapse: collapse; width: 100%; font-size: 0.95rem; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 600; color: var(--text-soft); }
.table-scroll { overflow-x: auto; margin: 0 0 1.5em; border: 1px solid var(--line); border-radius: 10px; }
.table-scroll table { margin: 0; }
.table-scroll tr:last-child td { border-bottom: 0; }

.wrap { max-width: var(--wrap); margin: 0 auto; padding: 0 16px; }
@media (min-width: 720px) { .wrap { padding: 0 28px; } }
.muted { color: var(--text-soft); }
.small { font-size: 0.9rem; }

.skip { position: absolute; left: -9999px; top: 8px; background: var(--accent); color: var(--accent-text); padding: 8px 12px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }

/* Header */
.site-header { border-bottom: 1px solid var(--line); background: var(--bg); }
@media (min-width: 720px) { .site-header { position: sticky; top: 0; z-index: 5; } [id] { scroll-margin-top: 110px; } }
.header-row { display: flex; align-items: center; gap: 12px; min-height: 60px; }
.brand { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; font-size: 1.2rem; color: var(--text); text-decoration: none; margin-right: auto; }
.logo { width: 28px; height: 28px; color: var(--accent); }
.logo .cut { fill: none; stroke: var(--bg); stroke-width: 2.6; stroke-linecap: round; }
.lang { display: flex; gap: 2px; font-size: 0.85rem; }
.lang a { color: var(--text-soft); text-decoration: none; padding: 4px 7px; border-radius: 6px; font-weight: 600; }
.lang a[aria-current] { color: var(--text); background: var(--bg-soft); }
.main-nav { display: flex; flex-wrap: wrap; gap: 4px 18px; padding-bottom: 10px; font-size: 0.95rem; }
.main-nav a { color: var(--text-soft); text-decoration: none; white-space: nowrap; padding: 2px 0; }
.main-nav a:hover, .main-nav a[aria-current] { color: var(--text); }
.main-nav a[aria-current] { box-shadow: inset 0 -2px 0 var(--accent); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: var(--accent); color: var(--accent-text); text-decoration: none; font-weight: 600;
  padding: 12px 20px; border-radius: 10px; border: 1px solid var(--accent); line-height: 1.2;
}
.btn:hover { filter: brightness(1.08); }
.btn-ghost { background: transparent; color: var(--accent); }
.btn-small { padding: 7px 12px; font-size: 0.9rem; border-radius: 8px; }
.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin: 1.5em 0 0.75em; }

/* Sections */
section { padding: 64px 0; }
section.alt { background: var(--bg-soft); }
.section-head { max-width: 760px; margin-bottom: 32px; }
.section-head p { color: var(--text-soft); font-size: 1.05rem; }
.eyebrow { display: inline-block; font-size: 0.8rem; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }

.hero { padding: 64px 0 48px; }
.hero-grid { display: grid; gap: 40px; align-items: center; }
@media (min-width: 960px) { .hero-grid { grid-template-columns: 1.05fr 1fr; } }
.hero .lead { font-size: 1.2rem; color: var(--text-soft); max-width: 40em; }
.hero-note { font-size: 0.9rem; color: var(--text-soft); }
.shot { border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); background: var(--bg-card); overflow: hidden; }
figure { margin: 0; }
figcaption { font-size: 0.9rem; color: var(--text-soft); margin-top: 10px; }

.grid { display: grid; gap: 20px; }
@media (min-width: 680px) { .grid-2 { grid-template-columns: repeat(2, 1fr); } .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 980px) { .grid-3 { grid-template-columns: repeat(3, 1fr); } }
.card { background: var(--bg-card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { display: flex; align-items: center; gap: 10px; }
.card p:last-child, .card ul:last-child { margin-bottom: 0; }
.card .meta { font-size: 0.85rem; color: var(--text-soft); border-top: 1px solid var(--line); padding-top: 10px; margin-top: 14px; }
.num { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; flex: none; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: 0.95rem; }
.tag { display: inline-block; font-size: 0.72rem; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; padding: 2px 8px; border-radius: 999px; background: var(--accent-soft); color: var(--accent); }

.checks { list-style: none; padding: 0; }
.checks li { position: relative; padding-left: 28px; margin-bottom: 0.6em; }
.checks li::before { content: ""; position: absolute; left: 4px; top: 0.5em; width: 12px; height: 7px; border-left: 2.5px solid var(--ok); border-bottom: 2.5px solid var(--ok); transform: rotate(-45deg); }

.steps { counter-reset: step; list-style: none; padding: 0; }
.steps > li { counter-increment: step; position: relative; padding: 0 0 18px 46px; }
.steps > li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 30px; height: 30px; border-radius: 50%; background: var(--accent-soft); color: var(--accent); font-weight: 700; display: flex; align-items: center; justify-content: center; }

.callout { border: 1px solid var(--warn-line); background: var(--warn-bg); border-radius: 10px; padding: 14px 18px; margin: 0 0 1.5em; }
.callout p:last-child { margin: 0; }

.redact { background: var(--redact); color: transparent; border-radius: 2px; padding: 0 2px; user-select: none; }

.demo-grid { display: grid; gap: 24px; }
@media (min-width: 760px) { .demo-grid { grid-template-columns: 1fr 1fr; } }
.demo-grid .shot img { width: 100%; }

.shots { display: grid; gap: 24px; }
@media (min-width: 900px) { .shots { grid-template-columns: 1fr 1fr; } .shots figure:first-child { grid-column: 1 / -1; } }

.download { text-align: center; }
.download .section-head { margin-left: auto; margin-right: auto; }
.download .btn-row { justify-content: center; }
.platforms { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; color: var(--text-soft); font-size: 0.95rem; padding: 0; list-style: none; }

/* Document pages */
.doc { max-width: 780px; padding: 48px 16px 64px; }
@media (min-width: 720px) { .doc { padding: 56px 28px 72px; } }
.doc h1 { font-size: clamp(1.9rem, 4.2vw, 2.6rem); }
.doc h2 { font-size: 1.45rem; margin-top: 1.8em; padding-top: 0.2em; }
.doc h3 { margin-top: 1.4em; }
.doc .lead { font-size: 1.12rem; color: var(--text-soft); }
.doc li { margin-bottom: 0.35em; }
.toc { background: var(--bg-soft); border: 1px solid var(--line); border-radius: 10px; padding: 14px 18px 4px; margin-bottom: 2em; font-size: 0.95rem; }
.toc ol { padding-left: 1.2em; }
.hash { font-family: var(--mono); font-size: 0.82rem; overflow-wrap: anywhere; }
.diagram { background: var(--code-bg); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; overflow-x: auto; font-size: 0.82rem; line-height: 1.45; }

/* Footer */
.site-footer { border-top: 1px solid var(--line); padding: 36px 0 44px; font-size: 0.92rem; color: var(--text-soft); background: var(--bg-soft); }
.site-footer p { margin: 0 0 0.6em; }
.site-footer strong { color: var(--text); }
.footer-grid { display: grid; gap: 20px; }
@media (min-width: 760px) { .footer-grid { grid-template-columns: 2fr 1fr; } }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; align-content: flex-start; }
.footer-links a { color: var(--text-soft); }
.footer-links a:hover { color: var(--text); }
.grid + .callout { margin-top: 20px; }

/* Article pages */
.doc .byline { color: var(--text-soft); font-size: 0.95rem; margin-top: -0.4em; }
.flow { width: 100%; height: auto; display: block; font-family: var(--font); }
.flow .bg { fill: var(--bg-soft); stroke: var(--line); }
.flow .box { fill: var(--bg-card); stroke: var(--text-soft); stroke-opacity: 0.55; stroke-width: 1.25; }
.flow .group { fill: none; }
.flow .opt { stroke-dasharray: 4 4; }
.flow .main { fill: var(--accent-soft); stroke: var(--accent); stroke-opacity: 1; stroke-width: 2; }
.flow .name { fill: var(--text); font-size: 13px; font-weight: 600; text-anchor: middle; }
.flow .body { fill: var(--text-soft); font-size: 11.5px; text-anchor: middle; }
.flow .body.strong { fill: var(--text); }
.flow .note { fill: var(--text-soft); font-size: 11.5px; }
.flow .edge { fill: none; stroke: var(--text-soft); stroke-width: 1.25; }
.flow .arrowhead { fill: var(--text-soft); }
.flow .title { fill: var(--text); font-size: 15px; font-weight: 600; }
.hero-article { font-size: 0.95rem; margin-top: 0.4em; }
.hero-article a { font-weight: 600; }