/* ReadingTrack Help Center. Colors follow src/web/src/design-tokens.css ("Quiet Growth"). */
:root {
  --bg: #FAFAF9;
  --panel: #FFFFFF;
  --surface: #F1F5F4;
  --primary: #2F7D6D;
  --primary-ink: #24675A;
  --primary-soft: #E3F1EE;
  --accent: #F4C430;
  --accent-soft: #FDF6DC;
  --text: #1F2933;
  --muted: #5F6B76;
  --border: #E5E7EB;
  --border-strong: #D3D8DD;
  --code-bg: #F3F5F4;
  --warn: #B45309;
  --warn-soft: #FEF3E2;
  --danger: #B91C1C;
  --danger-soft: #FDECEC;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 8px 24px rgba(16, 24, 40, .06);
  --radius: 12px;
  --topbar: 60px;
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --serif: 'Source Serif 4', Georgia, serif;
  --mono: 'JetBrains Mono', ui-monospace, 'Cascadia Code', Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #111615; --panel: #171D1C; --surface: #1C2423; --primary: #5FB8A5; --primary-ink: #7CCAB8;
    --primary-soft: #1D3430; --accent: #F4C430; --accent-soft: #2E2814; --text: #E6EAE9; --muted: #9AA6A3;
    --border: #273130; --border-strong: #34403E; --code-bg: #1C2423; --warn: #F0A85A; --warn-soft: #2D2215;
    --danger: #F08A8A; --danger-soft: #2E1A1A; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.3);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #111615; --panel: #171D1C; --surface: #1C2423; --primary: #5FB8A5; --primary-ink: #7CCAB8;
  --primary-soft: #1D3430; --accent: #F4C430; --accent-soft: #2E2814; --text: #E6EAE9; --muted: #9AA6A3;
  --border: #273130; --border-strong: #34403E; --code-bg: #1C2423; --warn: #F0A85A; --warn-soft: #2D2215;
  --danger: #F08A8A; --danger-soft: #2E1A1A; --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.3);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--topbar) + 16px); -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.65 var(--font); }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
img { max-width: 100%; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--panel); padding: 8px 12px; z-index: 100; }
.skip:focus { left: 8px; }
:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

/* Top bar */
.topbar { position: sticky; top: 0; z-index: 30; height: var(--topbar); background: color-mix(in srgb, var(--panel) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); }
.topbar-inner { display: flex; align-items: center; gap: 12px; height: 100%; max-width: 1440px; margin: 0 auto; padding: 0 20px; } /* lines up with .layout */
.brand { display: flex; align-items: center; gap: 9px; color: var(--text); font-weight: 700; font-size: 17px; letter-spacing: -.01em; }
.brand:hover { text-decoration: none; }
.brand img { object-fit: contain; } /* the ReadingTrack owl (src/web/public/logo.png) */
.brand em { font-style: normal; font-weight: 500; color: var(--muted); }
.topbar-spacer { flex: 1; }
.icon-btn { display: inline-grid; place-items: center; width: 36px; height: 36px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; }
.icon-btn:hover { background: var(--surface); color: var(--text); }
.menu-btn { display: none; }
.theme-btn .moon { display: none; }
:root[data-theme="dark"] .theme-btn .sun { display: none; }
:root[data-theme="dark"] .theme-btn .moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-btn .sun { display: none; }
  :root:not([data-theme="light"]) .theme-btn .moon { display: block; }
}
.switcher { position: relative; }
.switcher-btn { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 12px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); color: var(--text); font: 500 13px var(--font); cursor: pointer; }
.switcher-btn:hover { border-color: var(--border-strong); }
.switcher-menu { position: absolute; top: 40px; left: 0; width: 320px; padding: 6px; background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); }
.switcher-menu a { display: flex; gap: 12px; align-items: flex-start; padding: 10px; border-radius: 8px; color: var(--text); }
.switcher-menu a:hover, .switcher-menu a[aria-current] { background: var(--surface); text-decoration: none; }
.switcher-menu strong { display: block; font-size: 14px; font-weight: 600; }
.switcher-menu small { display: block; color: var(--muted); font-size: 12.5px; line-height: 1.4; }
.sw-icon { display: inline-grid; place-items: center; flex: none; width: 28px; height: 28px; border-radius: 8px; background: var(--primary-soft); color: var(--primary); font-size: 15px; }
.search-btn { display: flex; align-items: center; gap: 8px; width: 260px; height: 36px; padding: 0 10px; border: 1px solid var(--border); border-radius: 9px; background: var(--panel); color: var(--muted); font: 14px var(--font); cursor: pointer; }
.search-btn:hover { border-color: var(--border-strong); }
.search-btn span { flex: 1; text-align: left; }
kbd { font: 500 11px var(--font); padding: 2px 6px; border: 1px solid var(--border); border-bottom-width: 2px; border-radius: 5px; background: var(--surface); color: var(--muted); white-space: nowrap; }
.open-app { height: 34px; display: inline-flex; align-items: center; padding: 0 14px; border-radius: 8px; background: var(--primary); color: #fff; font-weight: 600; font-size: 13.5px; }
.open-app:hover { text-decoration: none; background: var(--primary-ink); }
:root[data-theme="dark"] .open-app { color: #0E1514; }

/* Layout */
.layout { display: grid; grid-template-columns: 272px minmax(0, 1fr); max-width: 1440px; margin: 0 auto; }
.sidebar { position: sticky; top: var(--topbar); height: calc(100vh - var(--topbar)); overflow-y: auto; padding: 22px 14px 40px 20px; border-right: 1px solid var(--border); }
.sidebar-section { display: flex; align-items: center; gap: 10px; padding: 0 8px 14px; margin-bottom: 8px; border-bottom: 1px solid var(--border); font-weight: 600; }
.nav-group { margin: 6px 0 10px; }
.nav-group summary { list-style: none; cursor: pointer; padding: 6px 8px; font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); display: flex; align-items: center; gap: 6px; }
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary::before { content: ''; width: 6px; height: 6px; border-right: 1.5px solid currentColor; border-bottom: 1.5px solid currentColor; transform: rotate(-45deg); transition: transform .15s; margin-right: 2px; }
.nav-group[open] summary::before { transform: rotate(45deg); }
.nav-group ul { list-style: none; margin: 2px 0 0; padding: 0 0 0 10px; border-left: 1px solid var(--border); margin-left: 11px; }
.nav-group li a { display: block; padding: 5px 10px; margin-left: -1px; border-left: 2px solid transparent; color: var(--muted); font-size: 14px; line-height: 1.45; }
.nav-group li a:hover { color: var(--text); text-decoration: none; }
.nav-group li a[aria-current] { color: var(--primary); border-left-color: var(--primary); font-weight: 600; }

main { display: grid; grid-template-columns: minmax(0, 1fr) 220px; gap: 48px; padding: 36px 48px 80px; }
.doc { min-width: 0; max-width: 760px; }

/* Article typography */
.crumbs { display: flex; flex-wrap: wrap; gap: 8px; font-size: 13px; color: var(--muted); margin-bottom: 14px; }
.crumbs a { color: var(--muted); }
.doc h1 { font: 600 36px/1.15 var(--serif); letter-spacing: -.015em; margin: 0 0 12px; }
.lede { font-size: 17.5px; color: var(--muted); margin: 0 0 28px; }
.doc h2 { font-size: 23px; line-height: 1.3; letter-spacing: -.01em; margin: 44px 0 12px; padding-top: 4px; position: relative; }
.doc h3 { font-size: 17.5px; margin: 30px 0 8px; position: relative; }
.doc h4 { font-size: 15px; margin: 22px 0 6px; }
.anchor { position: absolute; left: -22px; color: var(--border-strong); opacity: 0; font-weight: 400; }
h2:hover .anchor, h3:hover .anchor { opacity: 1; }
.anchor:hover { text-decoration: none; color: var(--primary); }
.doc p, .doc ul, .doc ol { margin: 0 0 14px; }
.doc ul, .doc ol { padding-left: 22px; }
.doc li { margin: 4px 0; }
.doc li::marker { color: var(--muted); }
.doc strong { font-weight: 600; }
.doc hr { border: 0; border-top: 1px solid var(--border); margin: 36px 0; }
code { font: 500 .86em var(--mono); background: var(--code-bg); border: 1px solid var(--border); padding: .1em .38em; border-radius: 5px; overflow-wrap: anywhere; }
pre { position: relative; margin: 0 0 18px; padding: 16px 18px; background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px; overflow-x: auto; font: 13px/1.6 var(--mono); }
pre code { background: none; border: 0; padding: 0; font-size: inherit; overflow-wrap: normal; }
.copy-btn { position: absolute; top: 8px; right: 8px; padding: 3px 9px; font: 500 12px var(--font); color: var(--muted); background: var(--panel); border: 1px solid var(--border); border-radius: 6px; cursor: pointer; opacity: 0; transition: opacity .15s; }
pre:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.ui { font-weight: 600; color: var(--text); background: var(--surface); border: 1px solid var(--border); padding: 0 .4em; border-radius: 5px; font-size: .92em; white-space: nowrap; }

table { width: 100%; border-collapse: collapse; margin: 0 0 20px; font-size: 14px; }
@media (max-width: 600px) { table { display: block; overflow-x: auto; } }
th, td { text-align: left; padding: 9px 12px; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-weight: 600; background: var(--surface); }
thead th:first-child { border-top-left-radius: 8px; }
thead th:last-child { border-top-right-radius: 8px; }
td .yes { color: var(--primary); font-weight: 700; }
td .no { color: var(--muted); }

/* Callouts */
.callout { display: flex; gap: 12px; margin: 0 0 18px; padding: 14px 16px; border-radius: 10px; background: var(--primary-soft); border: 1px solid color-mix(in srgb, var(--primary) 22%, transparent); }
.callout::before { content: 'i'; flex: none; width: 20px; height: 20px; margin-top: 2px; border-radius: 50%; background: var(--primary); color: var(--panel); font: 700 12px/20px var(--serif); text-align: center; }
.callout > div > :last-child { margin-bottom: 0; }
.callout.tip { background: var(--accent-soft); border-color: color-mix(in srgb, var(--accent) 45%, transparent); }
.callout.tip::before { content: '★'; background: var(--accent); color: #3a2e00; font: 700 11px/20px var(--font); }
.callout.warn { background: var(--warn-soft); border-color: color-mix(in srgb, var(--warn) 30%, transparent); }
.callout.warn::before { content: '!'; background: var(--warn); }
.callout strong:first-child { display: block; margin-bottom: 2px; }

/* Numbered tutorial steps */
ol.steps { list-style: none; counter-reset: step; padding: 0; margin: 8px 0 22px; }
ol.steps > li { counter-increment: step; position: relative; padding: 0 0 18px 46px; margin: 0; }
ol.steps > li::before { content: counter(step); position: absolute; left: 0; top: 0; width: 28px; height: 28px; border-radius: 50%; background: var(--primary); color: #fff; font: 600 13px/28px var(--font); text-align: center; }
:root[data-theme="dark"] ol.steps > li::before { color: #0E1514; }
ol.steps > li::after { content: ''; position: absolute; left: 13.5px; top: 34px; bottom: 6px; width: 1px; background: var(--border-strong); }
ol.steps > li:last-child::after { display: none; }
ol.steps > li > strong:first-child { display: block; font-size: 15.5px; margin-bottom: 2px; }
ol.steps > li > p { margin: 0 0 8px; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 14px; margin: 6px 0 26px; }
.cards.two { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.card { display: flex; flex-direction: column; gap: 4px; padding: 18px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--panel); color: var(--text); transition: border-color .15s, box-shadow .15s, transform .15s; position: relative; }
.card:hover { text-decoration: none; border-color: color-mix(in srgb, var(--primary) 45%, var(--border)); box-shadow: var(--shadow); transform: translateY(-1px); }
.card strong { font-size: 15px; font-weight: 600; padding-right: 22px; }
.card strong::after { content: '→'; position: absolute; right: 16px; top: 16px; color: var(--muted); transition: transform .15s, color .15s; }
.card:hover strong::after { transform: translateX(3px); color: var(--primary); }
.card span { color: var(--muted); font-size: 13.5px; line-height: 1.5; }
.card .logo { width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center; margin-bottom: 8px; font: 700 15px var(--font); color: #fff; }

/* Home hero */
.hero { padding: 28px 30px; margin: 0 0 32px; border-radius: 16px; background: radial-gradient(120% 140% at 100% 0%, var(--accent-soft) 0%, transparent 45%), linear-gradient(135deg, var(--primary-soft), var(--surface)); border: 1px solid var(--border); }
.hero p { font-size: 17px; color: var(--muted); max-width: 600px; margin: 0 0 18px; }
.hero-search { display: flex; align-items: center; gap: 10px; max-width: 460px; height: 46px; padding: 0 14px; background: var(--panel); border: 1px solid var(--border-strong); border-radius: 11px; color: var(--muted); cursor: text; font: 15px var(--font); width: 100%; }
.hero-search:hover { border-color: var(--primary); }
.hero-search span { flex: 1; text-align: left; }

/* Platform badges */
.badges { display: flex; flex-wrap: wrap; gap: 6px; margin: -12px 0 24px; }
.badge { font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 999px; background: var(--surface); border: 1px solid var(--border); color: var(--muted); }
.badge.pro { background: var(--accent-soft); color: #8a6a00; border-color: color-mix(in srgb, var(--accent) 50%, transparent); }
:root[data-theme="dark"] .badge.pro { color: var(--accent); }

/* Mock UI illustration, used in place of screenshots */
.mock { margin: 4px 0 22px; border: 1px solid var(--border); border-radius: 12px; overflow: hidden; background: var(--panel); box-shadow: var(--shadow); font-size: 13px; }
.mock-bar { display: flex; align-items: center; gap: 6px; padding: 9px 12px; background: var(--surface); border-bottom: 1px solid var(--border); color: var(--muted); font-size: 12px; }
.mock-bar i { width: 10px; height: 10px; border-radius: 50%; background: var(--border-strong); }
.mock-bar b { margin-left: 10px; font-weight: 500; flex: 1; background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 2px 10px; }
.mock-body { padding: 16px; }
.mock-row { display: flex; align-items: center; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--border); }
.mock-row:last-child { border-bottom: 0; }
.mock-row .t { flex: 1; font-weight: 500; }
.mock-row .m { color: var(--muted); font-size: 12px; }
.pill { font-size: 11px; font-weight: 600; padding: 1px 8px; border-radius: 999px; background: var(--primary-soft); color: var(--primary); }
.pill.y { background: var(--accent-soft); color: #8a6a00; }
:root[data-theme="dark"] .pill.y { color: var(--accent); }
figure { margin: 0 0 22px; }
figure img { display: block; border-radius: 12px; border: 1px solid var(--border); }
figcaption { font-size: 13px; color: var(--muted); margin-top: 8px; text-align: center; }
.video iframe { display: block; width: 100%; aspect-ratio: 16 / 9; border: 1px solid var(--border); border-radius: 12px; background: var(--code-bg); }

/* FAQ accordions */
details.faq { border: 1px solid var(--border); border-radius: 10px; margin: 0 0 10px; background: var(--panel); }
details.faq summary { cursor: pointer; padding: 13px 16px; font-weight: 600; list-style: none; display: flex; justify-content: space-between; gap: 12px; }
details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after { content: '+'; color: var(--muted); font-weight: 400; font-size: 18px; line-height: 1; }
details.faq[open] summary::after { content: '–'; }
details.faq > div { padding: 0 16px 14px; }
details.faq > div > :last-child { margin-bottom: 0; }

/* Help box + pager */
.help-box { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; margin: 56px 0 0; padding: 18px 20px; border: 1px solid var(--border); border-radius: var(--radius); background: var(--surface); }
.help-box strong { display: block; }
.help-box span { color: var(--muted); font-size: 14px; }
.help-box a { font-weight: 600; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 18px; }
.pager a { display: block; padding: 14px 16px; border: 1px solid var(--border); border-radius: 10px; color: var(--text); font-weight: 600; }
.pager a:hover { border-color: var(--primary); text-decoration: none; }
.pager small { display: block; color: var(--muted); font-weight: 400; font-size: 12.5px; }
.pager .next { text-align: right; grid-column: 2; }

/* On this page */
.toc { position: sticky; top: calc(var(--topbar) + 36px); align-self: start; max-height: calc(100vh - var(--topbar) - 60px); overflow-y: auto; font-size: 13px; }
.toc p { font-weight: 600; margin: 0 0 8px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a { display: block; padding: 4px 12px; margin-left: -1px; border-left: 2px solid transparent; color: var(--muted); line-height: 1.4; }
.toc .toc-h3 a { padding-left: 24px; }
.toc a:hover { color: var(--text); text-decoration: none; }
.toc a.active { color: var(--primary); border-left-color: var(--primary); }

/* Search */
.search-dialog { position: fixed; inset: 0; z-index: 50; background: rgba(10, 20, 18, .45); display: flex; justify-content: center; align-items: flex-start; padding: 10vh 16px 16px; }
.search-dialog[hidden] { display: none; }
.search-panel { width: 100%; max-width: 640px; background: var(--panel); border: 1px solid var(--border); border-radius: 14px; box-shadow: 0 24px 64px rgba(0,0,0,.25); overflow: hidden; }
.search-input { display: flex; align-items: center; gap: 10px; padding: 0 16px; border-bottom: 1px solid var(--border); color: var(--muted); }
.search-input input { flex: 1; height: 54px; border: 0; outline: 0; background: transparent; color: var(--text); font: 16px var(--font); }
.search-input input::-webkit-search-cancel-button { display: none; }
.search-results { list-style: none; margin: 0; padding: 8px; max-height: 60vh; overflow-y: auto; }
.search-results:empty { display: none; }
.search-results a { display: block; padding: 10px 12px; border-radius: 8px; color: var(--text); }
.search-results a:hover, .search-results li[aria-selected="true"] a { background: var(--primary-soft); text-decoration: none; }
.search-results small { display: block; color: var(--muted); font-size: 12px; }
.search-results .snip { display: block; color: var(--muted); font-size: 13px; margin-top: 2px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-results mark { background: var(--accent-soft); color: inherit; border-radius: 3px; padding: 0 1px; }
.search-empty { padding: 18px; color: var(--muted); text-align: center; }

/* Responsive */
@media (max-width: 1180px) {
  main { grid-template-columns: minmax(0, 1fr); padding: 32px 36px 72px; }
  .toc { display: none; }
}
@media (max-width: 900px) {
  .layout { grid-template-columns: minmax(0, 1fr); }
  .menu-btn { display: inline-grid; margin-left: -8px; }
  .sidebar { position: fixed; top: var(--topbar); left: 0; bottom: 0; height: auto; width: 290px; max-width: 85vw; z-index: 25; background: var(--panel); transform: translateX(-100%); transition: transform .2s; box-shadow: var(--shadow); }
  body.nav-open .sidebar { transform: none; }
  body.nav-open::after { content: ''; position: fixed; inset: var(--topbar) 0 0 0; background: rgba(0,0,0,.3); z-index: 20; }
  .search-btn { width: auto; }
  .search-btn span, .search-btn kbd { display: none; }
  .open-app { display: none; }
}
@media (max-width: 600px) {
  .topbar-inner { padding: 0 16px; gap: 6px; }
  .brand em, .brand span { display: none; }
  .switcher-menu { position: fixed; left: 16px; right: 16px; width: auto; top: calc(var(--topbar) - 6px); }
  main { padding: 24px 16px 64px; }
  .doc h1 { font-size: 29px; }
  .hero { padding: 22px 18px; }
  .anchor { display: none; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; }
}