/* TimeStamp Camera — User Guide
   Two-column layout, sticky sidebar, search, dark/light mode. */

:root {
  --accent: #ff8a3d;
  --accent-2: #e94560;
  --bg: #ffffff;
  --bg-elev: #f6f7f9;
  --bg-elev-2: #ecedf1;
  --text: #18181b;
  --text-mute: #5d6068;
  --border: #e3e5e9;
  --code-bg: #f1f2f5;
  --shadow: 0 8px 28px rgba(20,20,30,.06);
  --radius: 14px;
  --maxw: 760px;
  --sidebar: 280px;
  --topbar: 56px;
}

[data-theme="dark"] {
  --bg: #0e0f13;
  --bg-elev: #16181d;
  --bg-elev-2: #1d2027;
  --text: #f4f4f6;
  --text-mute: #9ca0a8;
  --border: #2a2d35;
  --code-bg: #1d2027;
  --shadow: 0 8px 28px rgba(0,0,0,.4);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e0f13;
    --bg-elev: #16181d;
    --bg-elev-2: #1d2027;
    --text: #f4f4f6;
    --text-mute: #9ca0a8;
    --border: #2a2d35;
    --code-bg: #1d2027;
    --shadow: 0 8px 28px rgba(0,0,0,.4);
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--topbar) + 16px); }
body {
  margin: 0;
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-text-size-adjust: 100%;
}

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

code {
  background: var(--code-bg);
  padding: 1px 6px;
  border-radius: 6px;
  font-size: 0.92em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

hr { border: 0; border-top: 1px solid var(--border); margin: 48px 0; }

/* Top bar -------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--topbar);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.brand-icon { width: 28px; height: 28px; }
.brand-text { font-size: 16px; }
.brand:hover { text-decoration: none; }

.topbar-nav { display: flex; align-items: center; gap: 6px; }

.menu-toggle, .theme-toggle {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  border-radius: 10px;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .15s ease;
}
.menu-toggle:hover, .theme-toggle:hover { background: var(--bg-elev); }
.menu-toggle { display: none; }

@media (max-width: 860px) {
  .menu-toggle { display: inline-flex; }
}

/* Layout --------------------------------------------------------------- */

.layout {
  display: grid;
  grid-template-columns: var(--sidebar) minmax(0, 1fr);
  gap: 0;
  align-items: start;
}

.sidebar {
  position: sticky;
  top: var(--topbar);
  height: calc(100vh - var(--topbar));
  overflow-y: auto;
  border-right: 1px solid var(--border);
  padding: 20px 14px 28px;
  background: var(--bg);
}

.sidebar-search input {
  width: 100%;
  padding: 9px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-elev);
  color: var(--text);
  font: inherit;
  font-size: 14px;
  outline: none;
}
.sidebar-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent);
}

.nav-group {
  margin-top: 18px;
}
.nav-group h4 {
  margin: 0 0 6px 8px;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.nav-group a {
  display: block;
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  transition: background .12s, color .12s;
}
.nav-group a:hover {
  background: var(--bg-elev);
  text-decoration: none;
}
.nav-group a.active {
  background: color-mix(in srgb, var(--accent) 18%, transparent);
  color: var(--accent);
  font-weight: 600;
}
.nav-group.hidden { display: none; }

@media (max-width: 860px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: fixed;
    top: var(--topbar);
    left: 0;
    right: 0;
    height: calc(100vh - var(--topbar));
    transform: translateX(-100%);
    transition: transform .25s ease;
    border-right: 0;
    border-bottom: 1px solid var(--border);
    z-index: 40;
    width: min(320px, 86vw);
    box-shadow: 0 0 0 100vmax rgba(0,0,0,0);
    pointer-events: none;
  }
  .sidebar.open {
    transform: translateX(0);
    pointer-events: auto;
    box-shadow: 0 0 0 100vmax rgba(0,0,0,.45);
  }
}

/* Content -------------------------------------------------------------- */

.content {
  padding: 32px 32px 80px;
  max-width: calc(var(--maxw) + 64px);
}

@media (max-width: 860px) {
  .content { padding: 22px 18px 60px; }
}

.content section {
  scroll-margin-top: calc(var(--topbar) + 16px);
  margin-bottom: 36px;
}

h1 {
  font-size: clamp(28px, 4vw, 38px);
  letter-spacing: -0.02em;
  margin: 4px 0 6px;
}
h2 {
  font-size: clamp(22px, 2.6vw, 28px);
  letter-spacing: -0.015em;
  margin: 28px 0 8px;
}
h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 18px 0 6px;
}

.lede {
  font-size: 17px;
  color: var(--text-mute);
  margin: 4px 0 24px;
  max-width: 640px;
}

p, ul, ol { margin: 8px 0 12px; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }

.tip {
  border-left: 3px solid var(--accent);
  background: color-mix(in srgb, var(--accent) 9%, transparent);
  padding: 10px 14px;
  border-radius: 8px;
  margin: 14px 0;
  color: var(--text);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0 16px;
  font-size: 14.5px;
}
table th, table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
table th {
  font-size: 13px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--text-mute);
  background: var(--bg-elev);
  font-weight: 700;
}
table.perms td:nth-child(3) { white-space: nowrap; }

details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin: 8px 0;
  background: var(--bg-elev);
}
details summary {
  cursor: pointer;
  font-weight: 600;
  list-style: none;
}
details summary::-webkit-details-marker { display: none; }
details[open] summary { color: var(--accent); }
details summary::before {
  content: "+";
  display: inline-block;
  width: 18px;
  font-weight: 700;
  color: var(--accent);
}
details[open] summary::before { content: "−"; }
details p { margin: 8px 0 0; color: var(--text-mute); font-size: 14.5px; }

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}
@media (max-width: 720px) {
  .grid { grid-template-columns: 1fr; gap: 14px; }
}

/* Hero ----------------------------------------------------------------- */

.hero {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 18px 0 6px;
}
@media (max-width: 720px) {
  .hero { grid-template-columns: 1fr; }
}
.hero-card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  box-shadow: var(--shadow);
}
.hero-card-title {
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-card-text {
  color: var(--text-mute);
  font-size: 14.5px;
  line-height: 1.5;
}

footer {
  margin-top: 48px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  color: var(--text-mute);
  font-size: 13px;
  text-align: center;
}
footer a { color: var(--text-mute); }