/* QLite site — self-contained, no external fonts or scripts. */

:root {
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --bg-raised: #ffffff;
  --text: #1d1d1f;
  --text-soft: #6e6e73;
  --line: rgba(0, 0, 0, 0.10);
  --accent: #2f6bfd;
  --accent-soft: rgba(47, 107, 253, 0.10);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.14);
  --radius: 14px;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
          "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0d0d0f;
    --bg-soft: #151518;
    --bg-raised: #1c1c1f;
    --text: #f2f2f5;
    --text-soft: #9a9aa2;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #6c9bff;
    --accent-soft: rgba(108, 155, 255, 0.14);
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 78px; }

body {
  margin: 0;
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

code, pre, kbd { font-family: var(--mono); }

pre {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 13.5px;
  line-height: 1.7;
}
pre code { background: none; padding: 0; }

p code {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 0.9em;
}

/* ---------- header ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px max(20px, 5vw);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  font-weight: 600;
  color: var(--text);
  font-size: 17px;
}
.brand:hover { text-decoration: none; }
.brand img { border-radius: 7px; }

.site-header nav {
  display: flex;
  gap: 22px;
  margin-left: auto;
  font-size: 14.5px;
}
.site-header nav a { color: var(--text-soft); }
.site-header nav a:hover { color: var(--text); text-decoration: none; }

#lang-toggle {
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 13px;
  cursor: pointer;
}
#lang-toggle:hover { background: var(--accent-soft); border-color: var(--accent); }

/* ---------- hero ---------- */

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(0, 1.15fr);
  gap: 56px;
  align-items: center;
  padding: 76px max(20px, 5vw) 60px;
  max-width: 1240px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}

.lede { font-size: 19px; color: var(--text-soft); margin: 0 0 28px; }

.cta { display: flex; flex-wrap: wrap; gap: 12px; }

.button {
  display: inline-block;
  padding: 11px 22px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
}
.button:hover { text-decoration: none; border-color: var(--accent); }
.button.primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.button.primary:hover { filter: brightness(1.08); }

.meta { font-size: 13.5px; color: var(--text-soft); margin-top: 22px; }

/* ---------- app window rendering ---------- */

.window {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  font-size: 12.5px;
}

.titlebar {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--bg-soft);
}
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }
.titlebar .title { margin-left: 12px; font-weight: 600; color: var(--text-soft); }

.window-body { display: grid; grid-template-columns: 168px 1fr; min-height: 330px; }

.sidebar {
  background: var(--bg-soft);
  border-right: 1px solid var(--line);
  padding: 10px 8px;
}
.sidebar .search {
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 4px 9px;
  color: var(--text-soft);
  margin-bottom: 12px;
}
.sidebar .group {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-soft);
  margin: 12px 0 4px 8px;
}
.sidebar .row { padding: 4px 9px; border-radius: 6px; }
.sidebar .row.selected { background: var(--accent); color: #fff; }

.detail { display: flex; flex-direction: column; }

.detail-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
}
.detail-head strong { display: block; font-size: 14px; }
.detail-head small { color: var(--text-soft); font-size: 11.5px; }

.tabs { display: flex; gap: 2px; background: var(--bg-soft); border-radius: 8px; padding: 2px; }
.tab { padding: 3px 10px; border-radius: 6px; color: var(--text-soft); white-space: nowrap; }
.tab.active { background: var(--accent); color: #fff; }

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 14px;
  border-bottom: 1px solid var(--line);
}
.field {
  flex: 1;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 4px 10px;
  color: var(--text-soft);
  background: var(--bg-soft);
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.chip { padding: 4px 11px; border-radius: 7px; border: 1px solid var(--line); color: var(--text-soft); white-space: nowrap; }
.chip.solid { background: var(--accent); border-color: var(--accent); color: #fff; }

.grid { width: 100%; border-collapse: collapse; }
.grid th {
  text-align: left;
  font-weight: 500;
  color: var(--text-soft);
  padding: 7px 14px;
  border-bottom: 1px solid var(--line);
  font-size: 11.5px;
}
.grid td { padding: 7px 14px; border-bottom: 1px solid color-mix(in srgb, var(--line) 55%, transparent); }
.grid tbody tr:nth-child(even) { background: color-mix(in srgb, var(--bg-soft) 70%, transparent); }
.grid tr.empty td { height: 26px; }

.statusbar {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  padding: 7px 14px;
  border-top: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 11.5px;
}

/* ---------- sections ---------- */

.section {
  max-width: 1140px;
  margin: 0 auto;
  padding: 72px max(20px, 5vw);
}
.section h2 {
  font-size: clamp(26px, 3vw, 34px);
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}
.section-lede { color: var(--text-soft); max-width: 68ch; margin: 0 0 30px; }

.section.highlight {
  max-width: none;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section.highlight > .split { max-width: 1140px; margin: 0 auto; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 18px;
  margin-top: 32px;
}
.card {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
}
.card h3 { margin: 0 0 8px; font-size: 17px; }
.card p { margin: 0; color: var(--text-soft); font-size: 15px; }

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 44px;
  align-items: start;
}
.split h3 { margin-top: 0; }
.split ul { color: var(--text-soft); padding-left: 20px; margin: 18px 0 0; }
.split li { margin-bottom: 9px; }
.split p { color: var(--text-soft); }

.panel {
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
  font-size: 14px;
}
.panel-head { font-weight: 600; margin-bottom: 10px; }
.panel-row {
  display: flex;
  justify-content: space-between;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-soft);
}
.panel-row code { font-size: 13px; color: var(--text); }
.panel-note { margin-top: 14px; color: var(--text-soft); font-size: 13.5px; }
.panel-action {
  display: inline-block;
  margin-top: 12px;
  padding: 6px 14px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: var(--bg-soft);
  font-size: 13.5px;
}

.note { font-size: 14.5px; }

/* ---------- QuickLook demo ---------- */

.ql-demo { display: flex; flex-direction: column; align-items: center; gap: 16px; }

.ql-card {
  width: min(620px, 100%);
  background: var(--bg-raised);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px 22px;
}
.ql-title { font-size: 19px; font-weight: 600; }
.ql-sub { color: var(--text-soft); font-size: 14px; margin-bottom: 18px; }
.ql-table {
  background: var(--bg-soft);
  border-radius: 10px;
  padding: 12px 14px;
  margin-bottom: 12px;
}
.ql-table-head { display: flex; justify-content: space-between; font-weight: 600; font-size: 15px; }
.ql-table-head span:last-child { font-weight: 400; color: var(--text-soft); font-size: 13px; }
.ql-cols { color: var(--text-soft); font-size: 12.5px; margin-top: 4px; }
.ql-rows { margin-top: 10px; font-family: var(--mono); font-size: 12px; }
.ql-rows > div { display: grid; grid-template-columns: 40px 110px 1fr 70px; gap: 8px; padding: 2px 0; }
.ql-rows span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.caption { color: var(--text-soft); font-size: 14px; text-align: center; max-width: 62ch; }

/* ---------- FAQ ---------- */

.faq { margin-top: 26px; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); }
.faq summary {
  cursor: pointer;
  padding: 16px 4px;
  font-weight: 500;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; color: var(--text-soft); font-size: 20px; line-height: 1; }
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 0 4px 18px; color: var(--text-soft); max-width: 78ch; }

/* ---------- shortcuts ---------- */

.keys {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 12px 26px;
  margin-top: 26px;
}
.keys > div {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line);
  color: var(--text-soft);
  font-size: 15px;
}
kbd {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-bottom-width: 2px;
  border-radius: 6px;
  padding: 2px 7px;
  font-size: 12.5px;
  color: var(--text);
  white-space: nowrap;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: 40px max(20px, 5vw);
  display: flex;
  flex-direction: column;
  gap: 14px;
  align-items: center;
  text-align: center;
  color: var(--text-soft);
  font-size: 14px;
}
.site-footer > div { display: flex; align-items: center; gap: 8px; font-weight: 600; color: var(--text); }
.site-footer img { border-radius: 6px; }
.site-footer nav { display: flex; flex-wrap: wrap; gap: 20px; justify-content: center; }
.site-footer p { margin: 0; }

/* ---------- responsive ---------- */

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; padding-top: 52px; gap: 40px; }
  .site-header nav { display: none; }
  .site-header { gap: 12px; }
  #lang-toggle { margin-left: auto; }
  .window-body { grid-template-columns: 140px 1fr; }
  .tabs .tab:nth-child(n + 4) { display: none; }
}

@media (max-width: 560px) {
  body { font-size: 16px; }
  .window-body { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .ql-rows > div { grid-template-columns: 30px 90px 1fr; }
  .ql-rows span:last-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}