@charset "UTF-8";

:root {
  --paper: #f7f8f5;
  --surface: #ffffff;
  --surface-soft: #f1f4ef;
  --surface-warm: #fbf7ed;
  --ink: #17241f;
  --ink-2: #40514a;
  --muted: #728078;
  --line: #e2e7e1;
  --line-strong: #cfd8d0;
  --green: #2d6a5a;
  --green-2: #3e8270;
  --green-soft: #e5f0eb;
  --lime: #c9e57c;
  --blue: #3569a8;
  --blue-soft: #eaf0f8;
  --amber: #a66321;
  --amber-soft: #fbf0df;
  --red: #b34c45;
  --red-soft: #fbecea;
  --purple: #72549b;
  --purple-soft: #f0ebf7;
  --code: #17231f;
  --code-ink: #e9f0eb;
  --shadow: 0 10px 35px rgba(31, 56, 45, .07);
  --shadow-lg: 0 24px 70px rgba(25, 47, 38, .14);
  --radius: 16px;
  --sidebar: 244px;
  --topbar: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
button, input, select, textarea { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
button { color: inherit; }
img, svg { display: block; max-width: 100%; }
::selection { background: #d7e8c2; color: #1e382d; }
:focus-visible { outline: 3px solid rgba(53, 105, 168, .3); outline-offset: 3px; }
.skip-link { position: fixed; z-index: 200; top: -60px; left: 16px; background: var(--ink); color: white; padding: 8px 16px; border-radius: 8px; }
.skip-link:focus { top: 12px; }
.icon { width: 19px; height: 19px; flex: 0 0 auto; stroke: currentColor; fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
[data-icon] { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto; }

.app-shell { min-height: 100vh; }
.sidebar {
  position: fixed; inset: 0 auto 0 0; z-index: 40;
  width: var(--sidebar); padding: 26px 18px 18px;
  background: #fbfcf9; border-right: 1px solid var(--line);
  display: flex; flex-direction: column;
}
.brand { display: flex; gap: 12px; align-items: center; padding: 0 8px 30px; }
.brand-mark { width: 40px; height: 40px; position: relative; display: block; background: var(--green); border-radius: 12px; overflow: hidden; box-shadow: inset 0 0 0 1px rgba(255,255,255,.16); }
.brand-mark span { position: absolute; height: 5px; background: var(--lime); border-radius: 5px; transform: rotate(-32deg); }
.brand-mark span:nth-child(1) { width: 23px; left: 6px; top: 22px; }
.brand-mark span:nth-child(2) { width: 20px; left: 16px; top: 14px; background: white; }
.brand-mark span:nth-child(3) { width: 10px; left: 12px; top: 10px; height: 10px; border-radius: 50%; background: white; opacity: .45; }
.brand strong { display: block; font-size: 17px; letter-spacing: .04em; line-height: 1.35; }
.brand small { display: block; color: var(--muted); font-size: 9px; letter-spacing: .2em; margin-top: 4px; font-weight: 700; }
.sidebar-caption { padding: 0 12px 9px; color: #9aa59e; font-size: 9px; font-weight: 800; letter-spacing: .16em; }
.sidebar-caption.second { margin-top: 24px; }
.main-nav { display: grid; gap: 4px; }
.main-nav a { display: flex; align-items: center; gap: 11px; min-height: 42px; padding: 9px 12px; color: #58675f; border-radius: 10px; font-size: 14px; font-weight: 550; transition: .18s ease; }
.main-nav a:hover { background: var(--surface-soft); color: var(--ink); }
.main-nav a.active { color: #234f42; background: var(--green-soft); font-weight: 700; }
.main-nav a.active [data-icon] { color: var(--green); }
.nav-count { margin-left: auto; min-width: 26px; padding: 0 6px; text-align: center; border-radius: 6px; color: var(--green); background: rgba(255,255,255,.7); font-size: 11px; line-height: 20px; }
.nav-count.subtle { background: transparent; color: var(--muted); }
.sidebar-progress { margin-top: auto; padding: 18px 12px 16px; }
.progress-label { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 9px; font-size: 12px; color: var(--muted); }
.progress-label strong { font-size: 14px; color: var(--ink); }
.progress-track { width: 100%; height: 5px; background: #e4e9e3; border-radius: 10px; overflow: hidden; }
.progress-track > span { display: block; height: 100%; border-radius: inherit; background: var(--green); transition: width .35s ease; }
.progress-note { color: var(--muted); font-size: 11px; margin-top: 9px; }
.sidebar-footer { border-top: 1px solid var(--line); padding: 17px 10px 2px; display: flex; gap: 8px; align-items: center; font-size: 10px; color: var(--muted); }
.status-dot { width: 6px; height: 6px; border-radius: 50%; background: #5d9a72; box-shadow: 0 0 0 3px #e4efe7; }
.workspace { min-height: 100vh; margin-left: var(--sidebar); }
.topbar { height: var(--topbar); position: sticky; top: 0; z-index: 30; display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 0 34px; background: rgba(247,248,245,.9); border-bottom: 1px solid rgba(220,227,220,.85); backdrop-filter: blur(18px); }
.search-trigger { border: 1px solid var(--line); background: rgba(255,255,255,.8); color: var(--muted); width: min(420px, 48vw); border-radius: 10px; padding: 8px 10px 8px 12px; display: flex; gap: 9px; align-items: center; cursor: pointer; text-align: left; font-size: 12px; transition: .18s; }
.search-trigger:hover { border-color: var(--line-strong); box-shadow: 0 3px 12px rgba(25,50,40,.04); }
.search-trigger .icon { width: 16px; }
kbd { margin-left: auto; border: 1px solid var(--line); background: var(--surface-soft); border-radius: 5px; min-width: 22px; padding: 0 6px; text-align: center; font-family: inherit; font-size: 11px; color: #89948d; }
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.source-badge { display: flex; align-items: center; gap: 7px; color: var(--muted); font-size: 11px; white-space: nowrap; }
.source-badge > span { width: 6px; height: 6px; background: var(--green-2); border-radius: 50%; }
.icon-button { width: 36px; height: 36px; border: 0; background: transparent; border-radius: 9px; display: inline-flex; align-items: center; justify-content: center; cursor: pointer; color: var(--muted); }
.icon-button:hover { color: var(--green); background: var(--green-soft); }
.mobile-menu { display: none; }
#main-content { min-height: calc(100vh - var(--topbar)); }
.page { width: min(1240px, calc(100% - 64px)); margin: 0 auto; padding: 42px 0 70px; }
.page-narrow { width: min(1060px, calc(100% - 64px)); }

/* Shared typography and controls */
.eyebrow { color: var(--green); font-size: 11px; font-weight: 800; letter-spacing: .14em; text-transform: uppercase; display: flex; align-items: center; gap: 8px; margin-bottom: 14px; }
.eyebrow::before { content: ""; width: 20px; height: 2px; background: var(--green); }
h1, h2, h3, h4, p { margin-top: 0; }
h1 { font-size: clamp(30px, 4vw, 48px); line-height: 1.18; letter-spacing: -.045em; margin-bottom: 18px; }
h2 { font-size: 25px; line-height: 1.35; letter-spacing: -.025em; }
h3 { line-height: 1.45; }
.muted { color: var(--muted); }
.lead { color: var(--ink-2); font-size: 16px; line-height: 1.9; max-width: 750px; }
.section { margin-top: 48px; }
.section-heading { display: flex; justify-content: space-between; gap: 20px; align-items: end; margin-bottom: 20px; }
.section-heading h2 { margin-bottom: 5px; }
.section-heading p { color: var(--muted); margin: 0; font-size: 13px; }
.text-link { color: var(--green); font-weight: 700; font-size: 13px; display: inline-flex; align-items: center; gap: 5px; white-space: nowrap; }
.text-link:hover { color: var(--green-2); }
.text-link .icon { width: 15px; }
.btn { border: 1px solid transparent; border-radius: 10px; padding: 10px 17px; display: inline-flex; align-items: center; justify-content: center; gap: 8px; cursor: pointer; font-size: 13px; font-weight: 700; transition: .18s; }
.btn-primary { background: var(--green); color: white; box-shadow: 0 5px 14px rgba(45,106,90,.15); }
.btn-primary:hover { background: #245a4c; transform: translateY(-1px); }
.btn-secondary { background: white; border-color: var(--line-strong); color: var(--ink-2); }
.btn-secondary:hover { border-color: var(--green); color: var(--green); }
.btn-ghost { background: transparent; color: var(--muted); }
.btn-small { padding: 7px 11px; font-size: 12px; border-radius: 8px; }
.btn.completed { color: var(--green); background: var(--green-soft); border-color: transparent; }
.pill { display: inline-flex; align-items: center; gap: 5px; padding: 3px 9px; border-radius: 99px; background: var(--surface-soft); color: var(--ink-2); font-size: 11px; line-height: 1.6; white-space: nowrap; }
.pill.green { background: var(--green-soft); color: var(--green); }
.pill.blue { background: var(--blue-soft); color: var(--blue); }
.pill.amber { background: var(--amber-soft); color: var(--amber); }
.pill.purple { background: var(--purple-soft); color: var(--purple); }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); }
.divider { height: 1px; background: var(--line); margin: 28px 0; }
.empty-state { padding: 60px 30px; text-align: center; background: white; border: 1px dashed var(--line-strong); border-radius: var(--radius); }
.empty-state .empty-icon { margin: 0 auto 16px; width: 54px; height: 54px; border-radius: 16px; display: grid; place-items: center; color: var(--green); background: var(--green-soft); }
.empty-state .empty-icon .icon { width: 25px; height: 25px; }
.empty-state h3 { margin-bottom: 7px; }
.empty-state p { color: var(--muted); }

/* Home */
.home-page { padding-top: 34px; }
.hero { position: relative; overflow: hidden; min-height: 390px; border-radius: 22px; background: #e9efe6; border: 1px solid #dde6da; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(300px, .7fr); }
.hero-copy { padding: 50px 48px 42px; position: relative; z-index: 2; }
.hero h1 { max-width: 690px; font-size: clamp(35px, 4.3vw, 54px); }
.hero h1 em { font-style: normal; color: var(--green); position: relative; white-space: nowrap; }
.hero h1 em::after { content: ""; position: absolute; height: 7px; left: 2px; right: 2px; bottom: -1px; background: var(--lime); opacity: .8; z-index: -1; border-radius: 50%; transform: rotate(-1deg); }
.hero .lead { max-width: 600px; font-size: 15px; }
.hero-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 26px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 19px; margin-top: 28px; color: #607067; font-size: 11px; }
.hero-proof span { display: flex; gap: 6px; align-items: center; }
.hero-proof .icon { width: 14px; color: var(--green); }
.hero-visual { position: relative; display: flex; align-items: center; justify-content: center; padding: 30px 32px 30px 0; }
.hero-orbit { width: 300px; height: 300px; border: 1px solid rgba(45,106,90,.14); border-radius: 50%; position: relative; }
.hero-orbit::before, .hero-orbit::after { content: ""; position: absolute; border-radius: 50%; border: 1px solid rgba(45,106,90,.11); inset: 35px; }
.hero-orbit::after { inset: 76px; background: rgba(255,255,255,.42); }
.stack-node { position: absolute; z-index: 2; min-width: 94px; background: rgba(255,255,255,.92); border: 1px solid rgba(207,218,208,.9); box-shadow: 0 10px 30px rgba(34,66,52,.08); border-radius: 13px; padding: 11px 14px; }
.stack-node strong { display: block; font-size: 14px; line-height: 1.35; }
.stack-node small { color: var(--muted); font-size: 10px; }
.stack-node.go { top: 28px; left: -10px; }
.stack-node.vue { top: 53px; right: -17px; }
.stack-node.mysql { bottom: 38px; left: -5px; }
.stack-node.devops { bottom: 19px; right: -3px; }
.stack-center { position: absolute; z-index: 3; inset: 105px; display: grid; place-items: center; text-align: center; color: var(--green); font-size: 11px; font-weight: 800; line-height: 1.4; letter-spacing: .05em; }
.stack-center strong { display: block; font-size: 25px; letter-spacing: -.05em; }
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); margin: 22px 0 0; border: 1px solid var(--line); background: white; border-radius: 15px; }
.stat { padding: 19px 25px; display: flex; gap: 13px; align-items: center; border-right: 1px solid var(--line); }
.stat:last-child { border: 0; }
.stat strong { font-size: 25px; line-height: 1.2; letter-spacing: -.04em; }
.stat span { display: block; color: var(--muted); font-size: 11px; }
.stat-number { min-width: 56px; }
.stat-icon { width: 35px; height: 35px; border-radius: 10px; background: var(--green-soft); color: var(--green); display: grid; place-items: center; }
.truth-banner { margin-top: 20px; border: 1px solid #e8dcc2; background: var(--surface-warm); border-radius: 13px; padding: 14px 18px; display: flex; gap: 12px; align-items: flex-start; color: #67553a; font-size: 12px; }
.truth-banner [data-icon] { margin-top: 3px; color: var(--amber); }
.truth-banner strong { color: #59462b; }
.track-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.track-card { position: relative; overflow: hidden; padding: 24px; min-height: 268px; display: flex; flex-direction: column; transition: .2s ease; }
.track-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--line-strong); }
.track-top { display: flex; justify-content: space-between; align-items: start; }
.track-icon { width: 43px; height: 43px; border-radius: 12px; display: grid; place-items: center; background: var(--green-soft); color: var(--green); }
.track-card.frontend .track-icon { color: var(--blue); background: var(--blue-soft); }
.track-card.engineering .track-icon { color: var(--amber); background: var(--amber-soft); }
.track-index { font-family: Georgia, serif; font-size: 30px; color: #e0e6df; font-style: italic; }
.track-card h3 { margin: 18px 0 6px; font-size: 18px; }
.track-card > p { color: var(--muted); font-size: 12px; min-height: 42px; margin-bottom: 16px; }
.tech-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.track-bottom { display: flex; justify-content: space-between; align-items: center; margin-top: auto; padding-top: 18px; color: var(--muted); font-size: 11px; }
.track-bottom a { color: var(--green); font-weight: 700; }
.continue-card { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center; padding: 22px 25px; background: var(--green); color: white; border: 0; }
.continue-symbol { width: 48px; height: 48px; display: grid; place-items: center; background: rgba(255,255,255,.1); border-radius: 13px; }
.continue-card small { color: #c5d9d0; }
.continue-card h3 { margin: 3px 0; font-size: 17px; }
.continue-card p { margin: 0; color: #d9e6e0; font-size: 12px; }
.continue-card .btn { background: var(--lime); color: #243b2b; }
.compare-preview { display: grid; grid-template-columns: 1fr 52px 1fr; align-items: stretch; overflow: hidden; }
.compare-side { padding: 24px 28px; }
.compare-side.target { background: #f2f6f1; }
.compare-side .pill { margin-bottom: 13px; }
.compare-side h3 { font-size: 17px; margin-bottom: 9px; }
.compare-side p { color: var(--muted); font-size: 12px; margin: 0; }
.compare-arrow { display: grid; place-items: center; color: var(--green); background: white; z-index: 2; }
.compare-arrow span { width: 32px; height: 32px; display: grid; place-items: center; border-radius: 50%; border: 1px solid var(--line); }
.mini-code { margin-top: 16px; font: 11px/1.75 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; color: #52635b; white-space: pre-wrap; }

/* Catalog */
.page-header { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
.page-header h1 { font-size: 36px; margin-bottom: 9px; }
.page-header p { margin: 0; color: var(--muted); }
.filter-panel { padding: 17px 20px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 22px; }
.filter-search { flex: 1; min-width: 210px; display: flex; align-items: center; gap: 8px; background: var(--paper); border: 1px solid var(--line); border-radius: 9px; padding: 7px 11px; }
.filter-search .icon { width: 16px; color: var(--muted); }
.filter-search input { border: 0; outline: 0; width: 100%; background: transparent; color: var(--ink); font-size: 12px; }
.filter-select { border: 1px solid var(--line); background: var(--paper); color: var(--ink-2); border-radius: 9px; padding: 8px 30px 8px 11px; font-size: 12px; }
.track-tabs { display: flex; gap: 5px; margin-bottom: 26px; border-bottom: 1px solid var(--line); }
.track-tab { border: 0; border-bottom: 2px solid transparent; background: transparent; padding: 10px 17px 12px; color: var(--muted); cursor: pointer; font-size: 13px; }
.track-tab.active { color: var(--green); border-bottom-color: var(--green); font-weight: 700; }
.track-tab span { margin-left: 5px; font-size: 10px; opacity: .65; }
.catalog-layout { display: grid; grid-template-columns: 220px 1fr; gap: 28px; align-items: start; }
.chapter-nav { position: sticky; top: calc(var(--topbar) + 24px); padding: 17px; }
.chapter-nav h3 { margin: 0 0 12px; font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .08em; }
.chapter-nav a { display: block; padding: 7px 9px; border-radius: 7px; color: var(--ink-2); font-size: 12px; line-height: 1.45; }
.chapter-nav a:hover { background: var(--green-soft); color: var(--green); }
.chapter-nav .chapter-count { float: right; color: #9ca79f; }
.course-chapter { margin-bottom: 32px; scroll-margin-top: 95px; }
.chapter-title { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.chapter-title span { width: 25px; height: 25px; display: grid; place-items: center; border-radius: 7px; background: var(--green-soft); color: var(--green); font-size: 10px; font-weight: 800; }
.chapter-title h2 { font-size: 17px; margin: 0; }
.lesson-list { overflow: hidden; }
.lesson-row { display: grid; grid-template-columns: 36px 1fr auto; gap: 13px; align-items: center; padding: 17px 20px; border-bottom: 1px solid var(--line); transition: .15s; }
.lesson-row:last-child { border: 0; }
.lesson-row:hover { background: #fafbf8; }
.lesson-status { width: 25px; height: 25px; display: grid; place-items: center; border: 1px solid var(--line-strong); border-radius: 50%; color: transparent; }
.lesson-status.done { color: white; background: var(--green); border-color: var(--green); }
.lesson-status .icon { width: 13px; }
.lesson-main h3 { font-size: 14px; margin: 0 0 3px; font-weight: 650; }
.lesson-main p { margin: 0; color: var(--muted); font-size: 11px; max-width: 650px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.lesson-meta { display: flex; gap: 8px; align-items: center; margin-top: 7px; color: var(--muted); font-size: 10px; }
.lesson-actions { display: flex; gap: 6px; align-items: center; }
.lesson-actions .icon-button { width: 30px; height: 30px; }
.lesson-actions .bookmarked { color: var(--amber); background: var(--amber-soft); }
.result-count { color: var(--muted); font-size: 12px; margin-bottom: 12px; }

/* Lesson */
.lesson-page { padding-top: 26px; }
.breadcrumbs { display: flex; gap: 7px; align-items: center; color: var(--muted); font-size: 11px; margin-bottom: 23px; }
.breadcrumbs a:hover { color: var(--green); }
.lesson-layout { display: grid; grid-template-columns: minmax(0, 1fr) 245px; gap: 34px; align-items: start; }
.lesson-article { min-width: 0; }
.lesson-header { padding: 32px 36px 28px; margin-bottom: 20px; position: relative; overflow: hidden; }
.lesson-header::after { content: ""; position: absolute; width: 180px; height: 180px; right: -55px; top: -75px; border: 35px solid var(--green-soft); border-radius: 50%; opacity: .65; }
.lesson-header-top { position: relative; z-index: 1; display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 15px; }
.lesson-header h1 { position: relative; z-index: 1; font-size: clamp(27px, 3vw, 37px); max-width: 780px; margin-bottom: 12px; }
.lesson-subtitle { position: relative; z-index: 1; color: var(--ink-2); max-width: 760px; margin-bottom: 20px; }
.lesson-info { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; color: var(--muted); font-size: 11px; }
.lesson-info span { display: flex; align-items: center; gap: 5px; }
.lesson-info .icon { width: 14px; }
.lesson-header-actions { display: flex; gap: 8px; margin-top: 22px; position: relative; z-index: 1; }
.objectives { padding: 22px 28px; margin-bottom: 20px; background: #f0f5ee; border-color: #dce7d9; }
.objectives h2 { font-size: 15px; margin-bottom: 12px; display: flex; gap: 8px; align-items: center; }
.objectives ul { margin: 0; padding: 0; display: grid; gap: 9px; list-style: none; }
.objectives li { display: flex; gap: 9px; font-size: 13px; color: var(--ink-2); }
.objectives li::before { content: ""; width: 16px; height: 16px; flex: 0 0 auto; margin-top: 4px; border-radius: 50%; background: var(--green); clip-path: polygon(14% 44%, 0 61%, 38% 100%, 100% 22%, 84% 7%, 36% 67%); }
.lesson-block { padding: 28px 34px; margin-bottom: 17px; scroll-margin-top: 92px; }
.lesson-block > h2 { font-size: 20px; margin-bottom: 15px; padding-bottom: 13px; border-bottom: 1px solid var(--line); }
.lesson-block > p { color: #384a41; line-height: 2; white-space: pre-line; margin-bottom: 0; }
.content-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; counter-reset: item; }
.content-list li { position: relative; padding-left: 26px; color: #384a41; line-height: 1.85; }
.content-list.bulleted li::before { content: ""; position: absolute; top: 11px; left: 5px; width: 6px; height: 6px; border-radius: 2px; background: var(--green-2); }
.content-list.numbered { counter-reset: step; }
.content-list.numbered li { counter-increment: step; padding-left: 35px; }
.content-list.numbered li::before { content: counter(step); position: absolute; left: 0; top: 2px; width: 22px; height: 22px; display: grid; place-items: center; background: var(--green-soft); color: var(--green); border-radius: 6px; font-size: 10px; font-weight: 800; }
.code-wrap { margin: 18px -10px -4px; border-radius: 12px; overflow: hidden; background: var(--code); border: 1px solid #24362e; }
.code-toolbar { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 13px; color: #aabbb2; background: #202f29; border-bottom: 1px solid #31433a; font-size: 10px; }
.code-toolbar > span { display: flex; align-items: center; gap: 7px; }
.code-lang { text-transform: uppercase; letter-spacing: .1em; color: #7f9a8c; }
.code-dots { display: inline-flex; gap: 4px; }
.code-dots i { width: 6px; height: 6px; border-radius: 50%; background: #53685d; }
.copy-code { border: 0; color: #b9c9c0; background: transparent; cursor: pointer; padding: 3px 6px; display: flex; align-items: center; gap: 5px; font-size: 10px; border-radius: 5px; }
.copy-code:hover { background: #35483e; color: white; }
.copy-code .icon { width: 13px; }
pre { margin: 0; padding: 19px 20px 22px; overflow: auto; color: var(--code-ink); font: 12px/1.85 ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace; tab-size: 4; }
pre code { font: inherit; white-space: pre; }
.tok-keyword { color: #a9d18e; }
.tok-string { color: #e8cb91; }
.tok-comment { color: #748c80; font-style: italic; }
.tok-number { color: #b5b3ed; }
.tok-tag { color: #88c9ba; }
.compare-block { margin-top: 18px; }
.compare-codes { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.compare-code-panel { min-width: 0; border: 1px solid var(--line); border-radius: 12px; overflow: hidden; background: var(--code); }
.compare-code-panel > header { padding: 9px 13px; background: #f1f3ee; color: var(--ink-2); font-size: 11px; font-weight: 700; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; }
.compare-code-panel.target > header { background: var(--green-soft); color: var(--green); }
.compare-code-panel .code-wrap { margin: 0; border: 0; border-radius: 0; }
.compare-explanation { margin-top: 12px; padding: 13px 16px; background: var(--blue-soft); border-left: 3px solid #7897bd; border-radius: 5px; color: #3f566f; font-size: 12px; line-height: 1.85; white-space: pre-line; }
.table-scroll { overflow-x: auto; border: 1px solid var(--line); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; font-size: 12px; line-height: 1.7; }
th { background: var(--surface-soft); color: var(--ink-2); font-weight: 700; text-align: left; white-space: nowrap; }
th, td { padding: 11px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
tr:last-child td { border-bottom: 0; }
td { color: #485950; min-width: 110px; }
td:first-child { color: var(--ink); font-weight: 650; }
.warning-block { padding: 22px 25px; background: var(--amber-soft); border: 1px solid #ebd8bb; border-radius: 13px; display: flex; gap: 14px; }
.warning-icon { width: 33px; height: 33px; flex: 0 0 auto; display: grid; place-items: center; border-radius: 9px; color: var(--amber); background: rgba(255,255,255,.65); }
.warning-block h3 { font-size: 15px; margin: 1px 0 6px; color: #795021; }
.warning-block p { margin: 0; color: #765d3b; font-size: 12px; line-height: 1.9; white-space: pre-line; }
.practice-card { padding: 28px 32px; margin-top: 28px; border-color: #cdddcf; }
.practice-card h2 { font-size: 20px; display: flex; align-items: center; gap: 9px; }
.practice-card h2 [data-icon] { color: var(--green); }
.practice-text { color: var(--ink-2); line-height: 1.9; white-space: pre-line; }
details.answer { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 14px; }
details.answer summary { cursor: pointer; color: var(--green); font-size: 12px; font-weight: 700; }
.answer-body { padding: 15px; margin-top: 10px; background: var(--surface-soft); border-radius: 9px; color: var(--ink-2); white-space: pre-wrap; font-size: 12px; line-height: 1.85; }
.quiz-card { padding: 28px 32px; margin-top: 17px; }
.quiz-card h2 { font-size: 20px; }
.quiz-question { font-weight: 650; margin-bottom: 16px; }
.quiz-options { display: grid; gap: 9px; }
.quiz-option { display: flex; gap: 11px; align-items: flex-start; text-align: left; border: 1px solid var(--line); background: white; border-radius: 9px; padding: 11px 14px; cursor: pointer; font-size: 12px; line-height: 1.7; }
.quiz-option:hover:not(:disabled) { border-color: var(--green); background: #f8fbf7; }
.quiz-option .option-letter { flex: 0 0 auto; width: 22px; height: 22px; display: grid; place-items: center; border-radius: 6px; background: var(--surface-soft); color: var(--muted); font-size: 10px; font-weight: 800; margin-top: 1px; }
.quiz-option.correct { border-color: #80aa94; background: var(--green-soft); color: #275344; }
.quiz-option.correct .option-letter { background: var(--green); color: white; }
.quiz-option.wrong { border-color: #dca39c; background: var(--red-soft); }
.quiz-option:disabled { cursor: default; }
.quiz-explain { margin-top: 13px; padding: 13px 16px; border-radius: 9px; background: var(--blue-soft); color: #3f566f; font-size: 12px; }
.source-note { margin-top: 17px; color: var(--muted); font-size: 11px; padding: 0 5px; }
.source-note strong { color: var(--ink-2); }
.source-note code { background: var(--surface-soft); padding: 2px 5px; border-radius: 4px; }
.lesson-pagination { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-top: 25px; }
.lesson-pagination a { padding: 15px 18px; background: white; border: 1px solid var(--line); border-radius: 11px; min-width: 0; }
.lesson-pagination a.next { text-align: right; }
.lesson-pagination small { display: block; color: var(--muted); font-size: 10px; }
.lesson-pagination strong { display: block; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-size: 12px; margin-top: 4px; }
.lesson-pagination a:hover { border-color: var(--green); color: var(--green); }
.lesson-aside { position: sticky; top: calc(var(--topbar) + 24px); display: grid; gap: 14px; }
.toc-card { padding: 20px; max-height: 52vh; overflow: auto; }
.toc-card h3, .note-card h3 { font-size: 12px; margin: 0 0 12px; }
.toc-card a { display: block; color: var(--muted); font-size: 11px; line-height: 1.5; padding: 6px 0 6px 11px; border-left: 1px solid var(--line); }
.toc-card a:hover { color: var(--green); border-left-color: var(--green); }
.note-card { padding: 18px; }
.note-card textarea { width: 100%; min-height: 115px; resize: vertical; border: 1px solid var(--line); background: var(--paper); border-radius: 8px; padding: 10px; color: var(--ink); font-size: 11px; line-height: 1.7; outline: 0; }
.note-card textarea:focus { border-color: var(--green); background: white; }
.note-footer { display: flex; justify-content: space-between; align-items: center; margin-top: 8px; color: var(--muted); font-size: 9px; }

/* Path, architecture, source, glossary */
.path-intro { padding: 30px 34px; background: #eaf0e6; border-color: #dce5d8; display: flex; justify-content: space-between; align-items: center; gap: 25px; }
.path-intro h2 { margin-bottom: 8px; }
.path-intro p { margin: 0; color: var(--ink-2); max-width: 720px; }
.path-score { text-align: center; flex: 0 0 auto; }
.path-score strong { display: block; color: var(--green); font-size: 34px; line-height: 1; }
.path-score small { color: var(--muted); }
.roadmap { position: relative; margin-top: 30px; }
.roadmap::before { content: ""; position: absolute; left: 26px; top: 20px; bottom: 30px; width: 1px; background: var(--line-strong); }
.roadmap-stage { position: relative; display: grid; grid-template-columns: 54px 1fr; gap: 20px; margin-bottom: 25px; }
.stage-number { position: relative; z-index: 2; width: 54px; height: 54px; display: grid; place-items: center; background: var(--paper); border: 1px solid var(--line-strong); border-radius: 50%; color: var(--green); font-weight: 800; }
.stage-body { padding: 24px 27px; }
.stage-head { display: flex; justify-content: space-between; align-items: start; gap: 15px; }
.stage-head h2 { font-size: 19px; margin-bottom: 6px; }
.stage-head p { color: var(--muted); font-size: 12px; margin: 0; }
.stage-lessons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.stage-lessons a { display: inline-flex; align-items: center; gap: 6px; padding: 6px 10px; border-radius: 8px; border: 1px solid var(--line); color: var(--ink-2); font-size: 11px; }
.stage-lessons a:hover { border-color: var(--green); color: var(--green); }
.stage-lessons a.done { background: var(--green-soft); color: var(--green); }
.arch-diagram { padding: 28px; overflow: hidden; }
.arch-flow { display: grid; grid-template-columns: repeat(6, 1fr); gap: 20px; position: relative; margin: 12px 0 28px; }
.arch-flow::before { content: ""; position: absolute; height: 1px; background: var(--line-strong); top: 35px; left: 7%; right: 7%; }
.arch-node { position: relative; z-index: 1; background: transparent; border: 0; cursor: pointer; padding: 0; text-align: center; }
.arch-node-icon { margin: 0 auto 10px; width: 70px; height: 70px; display: grid; place-items: center; border-radius: 18px; background: var(--surface-soft); border: 1px solid var(--line); color: var(--ink-2); transition: .18s; }
.arch-node:hover .arch-node-icon, .arch-node.active .arch-node-icon { background: var(--green); color: white; border-color: var(--green); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(45,106,90,.18); }
.arch-node strong { display: block; font-size: 12px; }
.arch-node small { color: var(--muted); font-size: 9px; }
.arch-detail { padding: 20px 23px; background: var(--paper); border-radius: 12px; border: 1px solid var(--line); }
.arch-detail h3 { font-size: 16px; margin-bottom: 8px; }
.arch-detail p { margin-bottom: 10px; color: var(--ink-2); font-size: 12px; }
.arch-detail ul { margin: 0; padding-left: 18px; color: var(--muted); font-size: 11px; }
.arch-layers { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-top: 22px; }
.arch-layer { padding: 19px; border-radius: 11px; background: var(--surface-soft); border: 1px solid var(--line); }
.arch-layer strong { display: block; color: var(--green); font-size: 12px; }
.arch-layer code { display: block; margin: 5px 0; font-size: 11px; }
.arch-layer p { font-size: 10px; color: var(--muted); margin: 0; }
.source-layout { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(300px, .8fr); gap: 20px; align-items: start; }
.file-tree-card { padding: 25px; }
.file-tree { font: 12px/1.95 ui-monospace, SFMono-Regular, Menlo, monospace; white-space: pre-wrap; color: #45584e; margin: 0; }
.file-tree .dir { color: var(--green); font-weight: 700; }
.file-tree .file { color: var(--blue); }
.source-facts { display: grid; gap: 12px; }
.fact-card { padding: 20px 22px; }
.fact-card h3 { font-size: 14px; margin-bottom: 7px; display: flex; align-items: center; gap: 8px; }
.fact-card p { margin: 0; color: var(--muted); font-size: 11px; }
.fact-card code { color: var(--green); word-break: break-all; }
.diff-table td:nth-child(2) { color: var(--red); }
.diff-table td:nth-child(3) { color: var(--green); }
.glossary-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
.term-card { padding: 19px 21px; }
.term-card h3 { font-size: 15px; margin-bottom: 5px; }
.term-card .term-en { color: var(--green); font-size: 9px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
.term-card p { margin: 8px 0 0; color: var(--muted); font-size: 11px; line-height: 1.8; }
.term-card a { display: inline-block; margin-top: 9px; color: var(--green); font-size: 10px; font-weight: 700; }
.notes-list { display: grid; gap: 14px; }
.note-item { padding: 21px 24px; }
.note-item-head { display: flex; justify-content: space-between; gap: 15px; }
.note-item h3 { font-size: 14px; margin-bottom: 4px; }
.note-item time { color: var(--muted); font-size: 10px; white-space: nowrap; }
.note-item p { color: var(--ink-2); font-size: 12px; white-space: pre-wrap; margin: 12px 0 0; padding-top: 12px; border-top: 1px solid var(--line); }

/* Search and toast */
.search-modal { position: fixed; inset: 0; z-index: 100; background: rgba(18,31,25,.35); backdrop-filter: blur(5px); padding: 10vh 20px 20px; }
.search-modal[hidden] { display: none; }
.search-panel { width: min(680px, 100%); max-height: 76vh; margin: 0 auto; background: white; border-radius: 16px; box-shadow: var(--shadow-lg); overflow: hidden; border: 1px solid rgba(255,255,255,.7); }
.search-input-wrap { display: flex; align-items: center; gap: 11px; padding: 16px 18px; border-bottom: 1px solid var(--line); }
.search-input-wrap [data-icon] { color: var(--green); }
.search-input-wrap input { flex: 1; min-width: 0; border: 0; outline: 0; font-size: 15px; color: var(--ink); }
.key-button { border: 1px solid var(--line); background: var(--surface-soft); color: var(--muted); border-radius: 5px; font-size: 9px; padding: 3px 6px; cursor: pointer; }
.search-meta { display: flex; justify-content: space-between; padding: 9px 18px; background: #fafbf9; color: var(--muted); font-size: 10px; }
.search-results { max-height: 55vh; overflow: auto; padding: 8px; }
.search-hint { padding: 38px 25px; text-align: center; color: var(--muted); font-size: 12px; }
.search-result { display: block; padding: 12px 13px; border-radius: 9px; }
.search-result:hover, .search-result.active { background: var(--green-soft); }
.search-result-top { display: flex; align-items: center; gap: 8px; }
.search-result strong { font-size: 12px; }
.search-result p { color: var(--muted); margin: 3px 0 0; font-size: 10px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-result mark { background: #e5efbd; color: inherit; border-radius: 2px; }
.toast-region { position: fixed; z-index: 120; right: 24px; bottom: 24px; display: grid; gap: 8px; }
.toast { background: #203a30; color: white; border-radius: 10px; padding: 11px 16px; box-shadow: var(--shadow-lg); font-size: 12px; display: flex; gap: 8px; align-items: center; animation: toast-in .2s ease; }
.toast .icon { color: var(--lime); width: 15px; }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: none; } }
.mobile-backdrop { display: none; }
.noscript { position: fixed; inset: 0; z-index: 300; background: white; padding: 20vh 10vw; text-align: center; }

@media (max-width: 1100px) {
  :root { --sidebar: 218px; }
  .page { width: calc(100% - 40px); }
  .hero-copy { padding: 40px 34px; }
  .hero { grid-template-columns: 1fr 290px; }
  .hero-visual { transform: scale(.88); transform-origin: center; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .lesson-layout { grid-template-columns: minmax(0, 1fr) 210px; gap: 20px; }
  .arch-flow { gap: 8px; }
  .arch-node-icon { width: 58px; height: 58px; }
  .arch-flow::before { top: 29px; }
}

@media (max-width: 860px) {
  :root { --sidebar: 244px; }
  .sidebar { transform: translateX(-100%); transition: transform .22s ease; box-shadow: var(--shadow-lg); }
  body.nav-open .sidebar { transform: translateX(0); }
  .mobile-backdrop { position: fixed; inset: 0; z-index: 35; background: rgba(20,35,28,.32); }
  body.nav-open .mobile-backdrop { display: block; }
  .workspace { margin-left: 0; }
  .mobile-menu { display: inline-flex; }
  .topbar { padding: 0 20px; }
  .search-trigger { width: min(420px, 65vw); }
  .hero { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
  .track-grid { grid-template-columns: 1fr; }
  .track-card { min-height: 230px; }
  .catalog-layout { grid-template-columns: 1fr; }
  .chapter-nav { display: none; }
  .lesson-layout { grid-template-columns: 1fr; }
  .lesson-aside { position: static; grid-template-columns: 1fr 1fr; }
  .toc-card { max-height: 280px; }
  .arch-flow { grid-template-columns: repeat(3, 1fr); row-gap: 25px; }
  .arch-flow::before { display: none; }
  .arch-layers { grid-template-columns: 1fr 1fr; }
  .source-layout { grid-template-columns: 1fr; }
  .glossary-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 600px) {
  body { font-size: 14px; }
  .topbar { height: 62px; padding: 0 12px; gap: 8px; }
  .source-badge { display: none; }
  .search-trigger { flex: 1; width: auto; }
  .search-trigger > span:nth-child(2) { overflow: hidden; white-space: nowrap; text-overflow: ellipsis; }
  .search-trigger kbd { display: none; }
  .page, .page-narrow { width: calc(100% - 24px); padding-top: 24px; }
  .hero { border-radius: 16px; min-height: auto; }
  .hero-copy { padding: 30px 23px; }
  .hero h1 { font-size: 33px; }
  .hero .lead { font-size: 13px; }
  .hero-proof { gap: 10px; }
  .stats-row { margin-top: 12px; }
  .stat { padding: 15px; }
  .stat strong { font-size: 21px; }
  .stat-icon { display: none; }
  .section { margin-top: 35px; }
  .section-heading { align-items: start; }
  .section-heading h2 { font-size: 21px; }
  .section-heading p { display: none; }
  .truth-banner { padding: 12px; }
  .continue-card { grid-template-columns: auto 1fr; padding: 20px; }
  .continue-card .btn { grid-column: 1 / -1; }
  .compare-preview { grid-template-columns: 1fr; }
  .compare-arrow { height: 35px; }
  .compare-arrow .icon { transform: rotate(90deg); }
  .page-header { align-items: start; }
  .page-header h1 { font-size: 29px; }
  .page-header .btn { display: none; }
  .filter-panel { padding: 13px; gap: 9px; }
  .filter-search { flex-basis: 100%; }
  .filter-select { flex: 1; min-width: 0; }
  .track-tabs { overflow-x: auto; }
  .track-tab { padding: 9px 11px; white-space: nowrap; }
  .lesson-row { grid-template-columns: 28px 1fr; padding: 15px 13px; gap: 9px; }
  .lesson-main p { max-width: 74vw; }
  .lesson-actions { grid-column: 2; justify-content: flex-start; }
  .lesson-header { padding: 25px 22px; }
  .lesson-header h1 { font-size: 27px; }
  .lesson-header-actions { flex-wrap: wrap; }
  .objectives, .lesson-block, .practice-card, .quiz-card { padding: 21px 19px; }
  .lesson-block > h2 { font-size: 18px; }
  .compare-codes { grid-template-columns: 1fr; }
  pre { font-size: 11px; padding: 16px; }
  .code-wrap { margin-left: -5px; margin-right: -5px; }
  .lesson-aside { grid-template-columns: 1fr; }
  .toc-card { display: none; }
  .lesson-pagination { grid-template-columns: 1fr; }
  .path-intro { padding: 23px; align-items: start; }
  .path-score { display: none; }
  .roadmap-stage { grid-template-columns: 37px 1fr; gap: 11px; }
  .roadmap::before { left: 18px; }
  .stage-number { width: 37px; height: 37px; font-size: 11px; }
  .stage-body { padding: 19px; }
  .stage-head { display: block; }
  .arch-diagram { padding: 19px 13px; }
  .arch-flow { grid-template-columns: repeat(2, 1fr); }
  .arch-layers { grid-template-columns: 1fr; }
  .glossary-grid { grid-template-columns: 1fr; }
  .file-tree-card { padding: 17px; }
  .file-tree { font-size: 10px; }
  .search-modal { padding: 5vh 10px 10px; }
  .toast-region { left: 15px; right: 15px; bottom: 15px; }
}

/* Email authentication and server synchronization */
.sync-status { color: var(--muted); font-size: 10px; white-space: nowrap; }
.sync-status.failed { color: var(--red); }
.user-chip { max-width: 210px; display: inline-flex; align-items: center; gap: 6px; padding: 5px 9px; border-radius: 8px; background: var(--green-soft); color: var(--green); font-size: 10px; }
.user-chip > span:last-child { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.user-chip .icon { width: 14px; }
.site-announcement { margin: 16px 34px -10px; padding: 11px 15px; border: 1px solid #e6d8b9; border-radius: 10px; background: var(--amber-soft); color: #765d3b; font-size: 12px; line-height: 1.7; white-space: pre-wrap; }

.auth-body { min-height: 100vh; background: #f4f6f1; }
.auth-shell { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(420px, .88fr); }
.auth-story { position: relative; overflow: hidden; padding: 42px 54px 34px; display: flex; flex-direction: column; background: #e7eee3; border-right: 1px solid #d9e3d6; }
.auth-story::before { content: ""; position: absolute; width: 480px; height: 480px; right: -170px; top: -190px; border: 1px solid rgba(45,106,90,.12); border-radius: 50%; box-shadow: 0 0 0 70px rgba(45,106,90,.025), 0 0 0 140px rgba(45,106,90,.02); }
.auth-story::after { content: ""; position: absolute; width: 230px; height: 230px; left: -100px; bottom: -100px; border: 45px solid rgba(201,229,124,.22); border-radius: 50%; }
.auth-brand { position: relative; z-index: 1; padding: 0; width: max-content; }
.auth-story-copy { position: relative; z-index: 1; margin: auto 0 42px; max-width: 660px; }
.auth-story-copy h1 { font-size: clamp(40px, 5.2vw, 65px); margin-bottom: 24px; }
.auth-story-copy h1 em { font-style: normal; color: var(--green); }
.auth-story-copy p { max-width: 570px; color: var(--ink-2); font-size: 15px; line-height: 2; }
.auth-learning-map { position: relative; z-index: 1; display: grid; gap: 9px; max-width: 650px; }
.auth-learning-map > div { display: grid; grid-template-columns: 35px 125px 1fr; gap: 11px; align-items: center; padding: 13px 16px; border: 1px solid rgba(194,207,192,.8); border-radius: 11px; background: rgba(255,255,255,.48); }
.auth-learning-map span { color: var(--green); font: italic 18px Georgia, serif; }
.auth-learning-map strong { font-size: 13px; }
.auth-learning-map small { color: var(--muted); font-size: 10px; }
.auth-story-footer { position: relative; z-index: 1; display: flex; gap: 24px; margin-top: 28px; color: var(--muted); font-size: 10px; }
.auth-story-footer span::before { content: "·"; color: var(--green); margin-right: 7px; }
.auth-panel { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: 40px 48px 20px; background: #fbfcf9; }
.auth-card { width: min(410px, 100%); margin: auto 0; }
.auth-card h2 { font-size: 33px; margin: 16px 0 8px; letter-spacing: -.035em; }
.auth-intro { color: var(--muted); font-size: 13px; margin-bottom: 29px; }
.auth-mobile-brand { display: none; }
.auth-label { display: block; margin-bottom: 8px; color: var(--ink-2); font-size: 12px; font-weight: 700; }
.auth-input-wrap { display: flex; align-items: center; gap: 10px; padding: 12px 14px; border: 1px solid var(--line-strong); border-radius: 11px; background: white; transition: .18s; }
.auth-input-wrap:focus-within { border-color: var(--green); box-shadow: 0 0 0 3px rgba(45,106,90,.09); }
.auth-input-wrap .icon { width: 18px; color: var(--muted); }
.auth-input-wrap input { min-width: 0; flex: 1; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: 14px; }
.auth-input-wrap input::placeholder { color: #a6afa9; }
.auth-field-hint { margin: 8px 0 19px; color: var(--muted); font-size: 10px; line-height: 1.7; }
.auth-submit { width: 100%; padding: 12px 17px; justify-content: space-between; }
.auth-submit:disabled { cursor: wait; opacity: .7; transform: none; }
.auth-error { margin: -7px 0 14px; padding: 9px 11px; border: 1px solid #edc9c4; border-radius: 8px; background: var(--red-soft); color: var(--red); font-size: 11px; }
.auth-announcement { margin-bottom: 20px; padding: 11px 13px; border: 1px solid #e6d8b9; border-radius: 9px; background: var(--amber-soft); color: #765d3b; font-size: 11px; white-space: pre-wrap; }
.auth-assurances { display: flex; justify-content: space-between; gap: 8px; margin-top: 20px; color: var(--green); font-size: 9px; }
.auth-privacy { margin-top: 26px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); font-size: 10px; line-height: 1.85; }
.auth-panel-footer { width: 100%; display: flex; justify-content: space-between; color: var(--muted); font-size: 9px; }
.auth-panel-footer a:hover { color: var(--green); }

@media (max-width: 1100px) {
  .sync-status { display: none; }
  .user-chip { max-width: 150px; }
  .auth-story { padding: 34px; }
  .auth-panel { padding: 35px; }
  .auth-learning-map > div { grid-template-columns: 32px 105px 1fr; }
}
@media (max-width: 860px) {
  .auth-shell { grid-template-columns: 1fr; }
  .auth-story { display: none; }
  .auth-panel { min-height: 100vh; padding: 30px 24px 20px; }
  .auth-mobile-brand { display: flex; align-items: center; gap: 11px; margin-bottom: 45px; }
  .auth-mobile-brand .brand-mark { width: 36px; height: 36px; }
  .site-announcement { margin: 12px 20px -5px; }
}
@media (max-width: 600px) {
  .user-chip { max-width: 105px; padding: 5px 7px; }
  .user-chip [data-icon] { display: none; }
  .topbar-actions { gap: 4px; }
  .auth-panel { padding: 24px 20px 16px; }
  .auth-card h2 { font-size: 29px; }
  .auth-assurances { flex-wrap: wrap; justify-content: flex-start; gap: 8px 15px; }
  .site-announcement { margin: 10px 12px 0; }
}