/* FitJ Help Center — AITA/FitJ visual language, dark by default, light on request. */
:root {
  --bg: #09090f;
  --bg-grad: radial-gradient(circle at 50% -10%, #1a1433 0, #09090f 44rem);
  --surface: #111118;
  --surface-2: #16151f;
  --border: rgba(255, 255, 255, .08);
  --border-hi: rgba(139, 92, 246, .45);
  --text: #f1f5f9;
  --text-2: #aab7c8;
  --muted: #7c8aa0;
  --accent: #a78bfa;
  --accent-strong: #8b5cf6;
  --accent-soft: rgba(139, 92, 246, .13);
  --cyan: #22d3ee;
  --cyan-soft: rgba(6, 182, 212, .12);
  --warn: #fbbf24;
  --warn-soft: rgba(251, 191, 36, .1);
  --pro: #ffd37a;
  --pro-soft: rgba(255, 211, 122, .1);
  --shadow: 0 18px 50px rgba(0, 0, 0, .45);
  --radius: 16px;
  --top: 64px;
  color-scheme: dark;
}
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    --bg: #f7f7fb; --bg-grad: radial-gradient(circle at 50% -10%, #ece7ff 0, #f7f7fb 40rem);
    --surface: #ffffff; --surface-2: #f2f0f9; --border: rgba(20, 16, 48, .1); --border-hi: rgba(124, 58, 237, .45);
    --text: #16122b; --text-2: #3f4659; --muted: #667085; --accent: #6d28d9; --accent-strong: #7c3aed;
    --accent-soft: rgba(124, 58, 237, .09); --cyan: #0e7490; --cyan-soft: rgba(8, 145, 178, .09);
    --warn: #92400e; --warn-soft: rgba(245, 158, 11, .12); --pro: #8a5a00; --pro-soft: rgba(245, 180, 40, .14);
    --shadow: 0 18px 50px rgba(30, 20, 80, .12); color-scheme: light;
  }
}
:root[data-theme="light"] {
  --bg: #f7f7fb; --bg-grad: radial-gradient(circle at 50% -10%, #ece7ff 0, #f7f7fb 40rem);
  --surface: #ffffff; --surface-2: #f2f0f9; --border: rgba(20, 16, 48, .1); --border-hi: rgba(124, 58, 237, .45);
  --text: #16122b; --text-2: #3f4659; --muted: #667085; --accent: #6d28d9; --accent-strong: #7c3aed;
  --accent-soft: rgba(124, 58, 237, .09); --cyan: #0e7490; --cyan-soft: rgba(8, 145, 178, .09);
  --warn: #92400e; --warn-soft: rgba(245, 158, 11, .12); --pro: #8a5a00; --pro-soft: rgba(245, 180, 40, .14);
  --shadow: 0 18px 50px rgba(30, 20, 80, .12); color-scheme: light;
}

* { box-sizing: border-box; }
html { scroll-padding-top: calc(var(--top) + 16px); -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--bg); background-image: var(--bg-grad); background-attachment: fixed;
  color: var(--text); font: 16px/1.7 Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
}
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--cyan); outline-offset: 2px; border-radius: 6px; }
h1, h2, h3 { font-family: "Space Grotesk", Inter, sans-serif; color: var(--text); letter-spacing: -.02em; line-height: 1.2; }
kbd {
  font: 600 11px/1 Inter, sans-serif; padding: 4px 6px; border-radius: 6px; border: 1px solid var(--border);
  background: var(--surface-2); color: var(--muted);
}
svg { flex: none; }
.muted { color: var(--muted); }
.skip { position: absolute; left: -999px; top: 8px; z-index: 100; background: var(--accent-strong); color: #fff; padding: 8px 14px; border-radius: 8px; }
.skip:focus { left: 12px; }

/* Top bar */
.topbar {
  position: sticky; top: 0; z-index: 40; height: var(--top);
  background: color-mix(in srgb, var(--bg) 82%, transparent); backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.topbar-inner { max-width: 1440px; margin: 0 auto; height: 100%; display: flex; align-items: center; gap: 12px; padding: 0 16px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--text); text-decoration: none; font: 600 17px "Space Grotesk", sans-serif; white-space: nowrap; }
.brand img { border-radius: 8px; }
.brand b { color: var(--accent); font-weight: 600; }
.search-trigger {
  margin-left: auto; display: flex; align-items: center; gap: 10px; min-width: 0; width: min(360px, 40vw);
  padding: 9px 12px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface);
  color: var(--muted); font: inherit; font-size: 14px; cursor: pointer; text-align: left;
}
.search-trigger span { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-trigger:hover { border-color: var(--border-hi); }
.top-links { display: flex; gap: 18px; font-size: 14px; }
.top-links a { color: var(--text-2); text-decoration: none; }
.top-links a:hover { color: var(--text); }
.icon-btn {
  display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-2); cursor: pointer;
}
.icon-btn:hover { color: var(--text); border-color: var(--border-hi); }
.menu-btn { display: none; }

/* Layout */
.layout { max-width: 1440px; margin: 0 auto; display: grid; grid-template-columns: 272px minmax(0, 1fr) 220px; }
.home .layout { grid-template-columns: 272px minmax(0, 1fr); }
.sidebar { position: sticky; top: var(--top); height: calc(100vh - var(--top)); border-right: 1px solid var(--border); }
.sidebar-scroll { height: 100%; overflow-y: auto; padding: 20px 12px 40px; }
.nav-home, .nav-group summary {
  display: flex; align-items: center; gap: 10px; padding: 8px 10px; border-radius: 10px;
  color: var(--text); font-weight: 600; font-size: 14px; text-decoration: none; cursor: pointer; list-style: none;
}
.nav-group summary::-webkit-details-marker { display: none; }
.nav-group summary::after { content: ""; margin-left: auto; width: 7px; height: 7px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: rotate(-45deg); transition: transform .2s; }
.nav-group[open] summary::after { transform: rotate(45deg); }
.nav-home:hover, .nav-group summary:hover { background: var(--surface-2); }
.nav-home svg, .nav-group summary svg { color: var(--accent); }
.nav-group ul { list-style: none; margin: 2px 0 8px; padding: 0 0 0 20px; border-left: 1px solid var(--border); margin-left: 19px; }
.nav-group li a { display: block; padding: 6px 10px; border-radius: 8px; color: var(--text-2); font-size: 14px; line-height: 1.4; text-decoration: none; }
.nav-group li a:hover { color: var(--text); background: var(--surface-2); }
.nav-group li a[aria-current="page"], .nav-home[aria-current="page"] { color: var(--accent); background: var(--accent-soft); }
.scrim { display: none; }

.content { min-width: 0; padding: 32px clamp(16px, 4vw, 56px) 0; outline: none; }
.crumbs { display: flex; gap: 8px; flex-wrap: wrap; font-size: 13px; color: var(--muted); margin-bottom: 18px; }
.crumbs a { color: var(--muted); text-decoration: none; }
.crumbs a:hover { color: var(--text); }

/* Article */
.article { max-width: 860px; }
.kicker { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; font-weight: 600; color: var(--cyan); background: var(--cyan-soft); padding: 4px 10px; border-radius: 999px; }
.article-head h1 { font-size: clamp(30px, 4.5vw, 44px); margin: 14px 0 10px; }
.lead { font-size: 18px; color: var(--text-2); margin: 0 0 18px; max-width: 720px; }
.article-tools { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-2);
  font: 500 13px Inter, sans-serif; text-decoration: none; cursor: pointer; line-height: 1.3;
}
.chip:hover { color: var(--text); border-color: var(--border-hi); }
.chip.is-done { color: var(--cyan); border-color: var(--cyan); }

.prose { color: var(--text-2); }
.prose h2 { font-size: 24px; margin: 40px 0 12px; padding-top: 4px; }
.prose h3 { font-size: 18px; margin: 28px 0 8px; }
.prose p { margin: 12px 0; }
.prose strong { color: var(--text); font-weight: 600; }
.prose code { font-size: .9em; padding: 2px 6px; border-radius: 6px; background: var(--surface-2); color: var(--text); }
.prose ul { padding-left: 22px; }
.prose li { margin: 6px 0; }
.prose ul li::marker { color: var(--accent); }
.prose ol { list-style: none; counter-reset: step; padding: 0; margin: 18px 0; }
.prose ol > li { counter-increment: step; position: relative; padding: 2px 0 14px 48px; margin: 0; }
.prose ol > li::before {
  content: counter(step); position: absolute; left: 0; top: 0; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; font: 700 14px "Space Grotesk", sans-serif; color: #fff;
  background: linear-gradient(135deg, var(--accent-strong), #06b6d4);
}
.prose ol > li:not(:last-child)::after { content: ""; position: absolute; left: 15px; top: 36px; bottom: 2px; width: 2px; background: var(--border); }
.table-wrap { overflow-x: auto; margin: 18px 0; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); }
.prose table { border-collapse: collapse; width: 100%; font-size: 14.5px; }
.prose th, .prose td { padding: 11px 14px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--border); }
.prose th { color: var(--text); font-weight: 600; background: var(--surface-2); white-space: nowrap; }
.prose tr:last-child td { border-bottom: 0; }
.prose td[align="center"], .prose th[align="center"] { text-align: center; }
.compare td:not(:first-child) { font-weight: 600; color: var(--text); }
.compare th:last-child, .compare td:last-child { background: var(--pro-soft); }

.admonition { margin: 20px 0; padding: 14px 18px 14px 18px; border-radius: 14px; border: 1px solid var(--border); border-left: 4px solid var(--accent); background: var(--accent-soft); }
.admonition > p { margin: 6px 0; }
.admonition > ul { margin: 6px 0; }
.admonition-title { font-weight: 700; color: var(--text); margin: 0 0 4px !important; display: flex; align-items: center; gap: 8px; }
.admonition-title::before { content: "i"; display: inline-grid; place-items: center; width: 20px; height: 20px; border-radius: 50%; font: 700 12px Inter, sans-serif; color: #fff; background: var(--accent-strong); }
.admonition.tip { border-left-color: var(--cyan); background: var(--cyan-soft); }
.admonition.tip .admonition-title::before { content: "✓"; background: #0891b2; }
.admonition.warning { border-left-color: var(--warn); background: var(--warn-soft); }
.admonition.warning .admonition-title::before { content: "!"; background: #d97706; }
.admonition.pro { border-left-color: var(--pro); background: var(--pro-soft); }
.admonition.pro .admonition-title::before { content: "★"; background: #b7791f; }

.prose details { margin: 10px 0; border: 1px solid var(--border); border-radius: 14px; background: var(--surface); overflow: hidden; }
.prose details[open] { border-color: var(--border-hi); }
.prose summary { cursor: pointer; padding: 14px 44px 14px 18px; font-weight: 600; color: var(--text); position: relative; list-style: none; }
.prose summary::-webkit-details-marker { display: none; }
.prose summary::after { content: "+"; position: absolute; right: 18px; top: 50%; transform: translateY(-50%); font-size: 22px; color: var(--accent); transition: transform .2s; }
.prose details[open] summary::after { transform: translateY(-50%) rotate(45deg); }
.prose details > :not(summary) { padding: 0 18px; }
.prose details > :last-child { padding-bottom: 12px; }
.levels ul { list-style: none; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 10px; }
.levels li { margin: 0; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--border); background: var(--surface); }
.levels li:nth-child(1) { border-left: 4px solid #22c55e; }
.levels li:nth-child(2) { border-left: 4px solid #06b6d4; }
.levels li:nth-child(3) { border-left: 4px solid #f59e0b; }
.levels li:nth-child(4) { border-left: 4px solid #94a3b8; }

.feedback { margin: 48px 0 24px; padding: 20px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.feedback h2 { font-size: 18px; margin: 0 0 12px; }
.fb-actions { display: flex; gap: 10px; }
.fb-thanks { margin: 12px 0 0; color: var(--text-2); }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 24px 0 8px; }
.pager a { display: flex; flex-direction: column; gap: 2px; padding: 14px 18px; border-radius: 14px; border: 1px solid var(--border); background: var(--surface); text-decoration: none; }
.pager a:hover { border-color: var(--border-hi); }
.pager small { color: var(--muted); font-size: 12px; }
.pager span { color: var(--text); font-weight: 600; }
.pager .next { text-align: right; grid-column: 2; }

.toc { position: sticky; top: var(--top); align-self: start; padding: 32px 16px 24px 8px; max-height: calc(100vh - var(--top)); overflow-y: auto; font-size: 13.5px; }
.toc p { margin: 0 0 10px; font-weight: 700; color: var(--text); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.toc ul { list-style: none; margin: 0; padding: 0; border-left: 1px solid var(--border); }
.toc a { display: block; padding: 5px 0 5px 14px; margin-left: -1px; border-left: 2px solid transparent; color: var(--muted); text-decoration: none; line-height: 1.4; }
.toc a:hover { color: var(--text); }
.toc a.is-active { color: var(--accent); border-left-color: var(--accent); }

/* Home */
.hero { padding: 36px 0 12px; max-width: 860px; }
.eyebrow { color: var(--cyan); font-weight: 600; font-size: 13px; letter-spacing: .12em; text-transform: uppercase; margin: 0; }
.hero h1 { font-size: clamp(36px, 6vw, 60px); margin: 10px 0 12px; }
.hero h1 span { background: linear-gradient(90deg, var(--accent), var(--cyan)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero-search {
  display: flex; align-items: center; gap: 12px; width: 100%; max-width: 640px; margin: 8px 0 18px; padding: 16px 18px;
  border-radius: 16px; border: 1px solid var(--border-hi); background: var(--surface); color: var(--muted);
  font: inherit; font-size: 17px; cursor: pointer; box-shadow: var(--shadow); text-align: left;
}
.hero-search span { flex: 1; }
.hero-search svg { color: var(--accent); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.section-head { margin: 56px 0 18px; }
.section-head h2 { font-size: 26px; margin: 0 0 4px; }
.section-head p { margin: 0; color: var(--muted); }
.tour-box { border: 1px solid var(--border); border-radius: 22px; background: var(--surface); padding: 18px; }
.tour-tabs { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; padding: 6px; border-radius: 16px; background: var(--surface-2); margin-bottom: 18px; }
.tour-tabs button {
  display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 10px 4px; border: 0; border-radius: 12px;
  background: transparent; color: var(--muted); font: 600 13px Inter, sans-serif; cursor: pointer;
}
.tour-tabs button:hover { color: var(--text); }
.tour-tabs button[aria-selected="true"] { background: var(--accent-soft); color: var(--accent); }
.tab-panel { display: grid; grid-template-columns: 240px 1fr; gap: 32px; align-items: center; animation: fade .25s ease; }
.tab-panel[hidden] { display: none; }
.phone { border-radius: 30px; border: 7px solid var(--surface-2); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 9 / 18.5; background: var(--bg); }
.phone img { width: 100%; height: 100%; object-fit: cover; object-position: top; display: block; }
.screen-ph { height: 100%; display: grid; place-content: center; justify-items: center; gap: 10px; color: var(--accent); background: var(--accent-soft); font: 600 18px "Space Grotesk", sans-serif; }
.tab-text h3 { font-size: 26px; margin: 0 0 8px; }
.tab-text p { color: var(--text-2); font-size: 17px; margin: 0 0 14px; }
.tab-text ul { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; }
.tab-text a { display: inline-block; font-weight: 600; text-decoration: none; }
.tab-text a:hover { text-decoration: underline; }
.big-steps { list-style: none; counter-reset: s; display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; padding: 0; margin: 0; }
.big-steps li { counter-increment: s; }
.big-steps a { position: relative; display: flex; flex-direction: column; height: 100%; padding: 20px 18px 18px 64px; border-radius: 16px; border: 1px solid var(--border); background: var(--surface); text-decoration: none; }
.big-steps a::before { content: counter(s); position: absolute; left: 18px; top: 18px; width: 32px; height: 32px; border-radius: 50%; display: grid; place-items: center; color: #fff; font: 700 15px "Space Grotesk", sans-serif; background: linear-gradient(135deg, var(--accent-strong), #06b6d4); }
.big-steps a:hover { border-color: var(--border-hi); }
.big-steps b { color: var(--text); }
.big-steps span { color: var(--muted); font-size: 14px; }
.cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; }
.card { padding: 20px; border-radius: 18px; border: 1px solid var(--border); background: var(--surface); scroll-margin-top: calc(var(--top) + 16px); }
.card:target { border-color: var(--border-hi); }
.card-icon { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; color: var(--accent); background: var(--accent-soft); }
.card h2 { font-size: 19px; margin: 14px 0 2px; }
.card p { margin: 0 0 10px; color: var(--muted); font-size: 14px; }
.card ul { list-style: none; padding: 0; margin: 0; }
.card li a { display: block; padding: 5px 0; font-size: 14.5px; text-decoration: none; }
.card li a:hover { text-decoration: underline; }

.footer { margin: 56px 0 0; padding: 24px 0 40px; border-top: 1px solid var(--border); font-size: 14px; color: var(--text-2); }
.footer p { margin: 4px 0; }

/* Search */
.search-dialog { position: fixed; inset: 0; z-index: 60; background: rgba(5, 5, 12, .6); backdrop-filter: blur(4px); display: flex; justify-content: center; align-items: flex-start; padding: 10vh 16px 16px; }
.search-dialog[hidden] { display: none; }
.search-panel { width: min(640px, 100%); border-radius: 18px; border: 1px solid var(--border-hi); background: var(--surface); box-shadow: var(--shadow); overflow: hidden; }
.search-field { display: flex; align-items: center; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); color: var(--accent); }
.search-field input { flex: 1; min-width: 0; border: 0; outline: 0; background: transparent; color: var(--text); font: 17px Inter, sans-serif; }
.search-field input::-webkit-search-cancel-button { display: none; }
.esc { border: 1px solid var(--border); background: var(--surface-2); color: var(--muted); font: 600 11px Inter, sans-serif; padding: 5px 8px; border-radius: 6px; cursor: pointer; }
.search-results { list-style: none; margin: 0; padding: 8px; max-height: 56vh; overflow-y: auto; }
.search-results li a { display: block; padding: 10px 12px; border-radius: 10px; text-decoration: none; color: var(--text-2); }
.search-results li a small { display: block; color: var(--cyan); font-size: 12px; font-weight: 600; }
.search-results li a b { color: var(--text); font-weight: 600; }
.search-results li a span { display: block; font-size: 13.5px; line-height: 1.5; color: var(--muted); }
.search-results li a[aria-selected="true"], .search-results li a:hover { background: var(--accent-soft); }
.search-results mark { background: rgba(34, 211, 238, .22); color: inherit; border-radius: 3px; padding: 0 1px; }
.search-empty { padding: 18px 12px; color: var(--muted); }
.search-hint { margin: 0; padding: 10px 16px; border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); }

@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } html { scroll-behavior: auto; } }

@media (max-width: 1180px) {
  .layout { grid-template-columns: 250px minmax(0, 1fr); }
  .toc { display: none; }
}
@media (max-width: 900px) {
  .layout, .home .layout { grid-template-columns: minmax(0, 1fr); }
  .menu-btn { display: inline-grid; }
  .sidebar { position: fixed; top: var(--top); left: 0; bottom: 0; height: auto; width: min(320px, 86vw); z-index: 50; background: var(--bg); transform: translateX(-102%); transition: transform .25s ease; }
  .sidebar.is-open { transform: none; box-shadow: var(--shadow); }
  .scrim { display: block; position: fixed; inset: var(--top) 0 0 0; z-index: 45; background: rgba(0, 0, 0, .5); }
  .scrim[hidden] { display: none; }
  .top-links { display: none; }
  .search-trigger { width: auto; flex: 1; }
  .search-trigger kbd { display: none; }
  .tab-panel { grid-template-columns: 1fr; }
  .phone { max-width: 220px; margin: 0 auto; }
  .big-steps { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .brand span { display: none; }
  .content { padding-top: 22px; }
  .tour-tabs { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .tour-tabs button { font-size: 11px; padding: 8px 2px; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { grid-column: 1; }
  .hero-search kbd { display: none; }
}
@media print {
  .topbar, .sidebar, .toc, .feedback, .pager, .article-tools, .search-dialog, .scrim, .footer { display: none !important; }
  body { background: #fff; color: #000; }
  .layout { display: block; }
  .prose, .lead { color: #000; }
  a { color: #000; }
}

/* Comparison table: keep the feature column visible while scrolling on phones. */
.compare table { min-width: 560px; }
.compare th:first-child, .compare td:first-child { position: sticky; left: 0; z-index: 1; background: var(--surface); box-shadow: 1px 0 0 var(--border); }
.compare th:first-child { background: var(--surface-2); }

/* Phone screenshots inside articles: a row of captioned device frames. */
.shots { display: flex; flex-wrap: wrap; gap: 20px; margin: 22px 0 26px; }
.prose > .shot, .shots .shot { margin: 0; width: 220px; flex: 0 0 auto; }
.prose > .shot { margin: 22px 0; }
.shot img { width: 100%; height: auto; display: block; border-radius: 22px; border: 6px solid var(--surface-2); box-shadow: var(--shadow); background: var(--surface); }
.shot figcaption { margin-top: 10px; font-size: 13px; line-height: 1.45; color: var(--muted); }
@media (max-width: 560px) {
  .shots { flex-wrap: nowrap; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 8px; margin-right: -16px; }
  .shots .shot { width: 62vw; scroll-snap-align: start; }
  .prose > .shot { width: 72vw; }
}