/* AI Training 2026 — layout glue and theme around FlexCore controls (fx-*). */
:root {
    --red: #ed1d24;
    --red-dark: #c4141a;
    --blue: #4876ba;
    --blue-dark: #2f5a9a;
    --ink: #111827;
    --ink-2: #374151;
    --muted: #6b7280;
    --night: #0f1b2d;
    --night-2: #16263f;
    --paper: #f7f8fb;
    --line: #e5e7eb;
    --card: #ffffff;
    --radius: 14px;
}

* { box-sizing: border-box; }

html { font-size: 16px; scroll-behavior: smooth; }

body {
    margin: 0;
    color: var(--ink);
    background: var(--paper);
    font-family: "Inter", "Segoe UI", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.55;
}

a { color: var(--blue-dark); }
a:hover { color: var(--red); }
:focus-visible { outline: 3px solid var(--blue); outline-offset: 2px; }

h1, h2, h3, h4 { line-height: 1.2; color: var(--ink); }
h1 { font-size: 2.4rem; margin: 0 0 12px; letter-spacing: -0.02em; }
h2 { font-size: 1.7rem; margin: 0 0 8px; letter-spacing: -0.01em; }
h3 { font-size: 1.15rem; margin: 22px 0 8px; }
h4 { font-size: 0.95rem; margin: 18px 0 6px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--ink-2); }
p { margin: 0 0 12px; }

.container { width: min(1240px, calc(100% - 40px)); margin: 0 auto; }
.narrow { width: min(900px, calc(100% - 40px)); }
.section { padding: 56px 0; }
.alt-band { background: #eef2f8; }
.muted { color: var(--muted); }
.small { font-size: 0.92rem; }
.lede { font-size: 1.15rem; color: var(--ink-2); max-width: 52rem; }
.button-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 18px; }
.badge-row { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 14px; }
.badge-row.center { justify-content: center; }

.skip-link { position: absolute; left: 12px; top: -40px; background: #fff; padding: 8px 12px; z-index: 5000; }
.skip-link:focus { top: 8px; }

.site-shell { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }

/* ---------- Top bar ---------- */
.top-bar {
    position: sticky; top: 0; z-index: 1000;
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--line);
}
.top-inner {
    width: min(1240px, calc(100% - 40px)); margin: 0 auto;
    display: flex; align-items: center; gap: 24px; min-height: 68px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; color: var(--ink); }
.brand-logo { height: 38px; width: auto; display: block; }
.brand-divider { width: 1px; height: 30px; background: var(--line); }
.brand-title { font-size: 1.15rem; font-weight: 600; white-space: nowrap; }
.brand-title strong { color: var(--red); }
.nav-links { display: flex; gap: 4px; margin-left: auto; white-space: nowrap; }
.nav-links a {
    text-decoration: none; color: var(--ink-2); font-weight: 500;
    padding: 8px 14px; border-radius: 999px;
}
.nav-links a:hover { background: #f1f5f9; color: var(--ink); }
.nav-links a.active { background: #eef2fb; color: var(--blue-dark); font-weight: 700; }

/* ---------- FlexCore button theming ---------- */
.site-shell .fx-button.btn-primary { background: var(--red); border-color: var(--red); color: #fff; font-weight: 600; border-radius: 8px; padding: 8px 16px; }
.site-shell .fx-button.btn-primary:hover:not(:disabled) { background: var(--red-dark); border-color: var(--red-dark); }
.site-shell .fx-button.btn-outline-primary { color: var(--blue-dark); border-color: var(--blue); border-radius: 8px; font-weight: 600; padding: 8px 16px; background: transparent; }
.site-shell .fx-button.btn-outline-primary:hover:not(:disabled) { background: var(--blue); color: #fff; }
.site-shell .fx-button.btn-secondary { border-radius: 8px; padding: 8px 14px; }
.site-shell .fx-button.cta-btn { white-space: nowrap; }
.site-shell .fx-button.cta-big { font-size: 1.1rem; padding: 14px 28px; }

/* ---------- Hero ---------- */
.hero {
    background:
        radial-gradient(1000px 500px at 85% 10%, rgba(72, 118, 186, 0.45), transparent 60%),
        radial-gradient(700px 400px at 0% 100%, rgba(237, 29, 36, 0.25), transparent 60%),
        linear-gradient(135deg, var(--night) 0%, var(--night-2) 100%);
    color: #fff;
    padding: 72px 0 84px;
    overflow: hidden;
}
.hero-inner { width: min(1240px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero h1 { color: #fff; font-size: 3.6rem; font-weight: 800; margin: 10px 0 16px; }
.hero h1 .accent { color: var(--red); }
.hero-lede { font-size: 1.2rem; color: #d7e1f0; max-width: 40rem; }
.eyebrow {
    display: inline-flex; align-items: center; gap: 10px;
    font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.08em; color: #c7d4ea;
}
.eyebrow.dark { color: var(--blue-dark); }
.eyebrow-logo { height: 34px; background: #fff; border-radius: 8px; padding: 3px 8px; }
.hero-search { display: flex; gap: 10px; margin-top: 26px; background: #fff; border-radius: 12px; padding: 6px; max-width: 640px; box-shadow: 0 12px 32px rgba(0,0,0,0.25); }
.hero-search > *:first-child { flex: 1; }
.hero-search input { border: none !important; font-size: 1rem; height: 44px; box-shadow: none !important; }
.hero-search .fx-button.hero-search-btn { white-space: nowrap; padding: 10px 20px; }
.hero-chips { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 16px; }
.muted-light { color: #9fb2cf; font-size: 0.9rem; }
.hero-chips .fx-chip { background: rgba(255,255,255,0.1); color: #fff; border-color: rgba(255,255,255,0.25); cursor: pointer; }
.hero-chips .fx-chip:hover { background: rgba(255,255,255,0.2); }
.hero-visual { position: relative; height: 380px; }
.hero-slide { position: absolute; border-radius: 14px; overflow: hidden; box-shadow: 0 24px 60px rgba(0,0,0,0.45); border: 1px solid rgba(255,255,255,0.15); }
.hero-slide img { display: block; width: 100%; }
.hero-slide-back { width: 78%; right: 0; top: 0; transform: rotate(3deg); opacity: 0.85; }
.hero-slide-front { width: 82%; left: 0; bottom: 10px; transform: rotate(-2deg); }
.hero-float {
    position: absolute; right: 6px; bottom: -6px; display: flex; gap: 10px; align-items: center;
    background: #fff; color: var(--ink); border-radius: 12px; padding: 10px 14px; box-shadow: 0 12px 30px rgba(0,0,0,0.3);
}
.hero-float strong { display: block; font-size: 0.95rem; }
.hero-float span { font-size: 0.8rem; color: var(--muted); }

/* ---------- Stats ---------- */
.stats-band { margin-top: -40px; position: relative; z-index: 2; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.stats-grid > * { background: #fff; border-radius: var(--radius); box-shadow: 0 10px 30px rgba(15, 27, 45, 0.12); overflow: hidden; }
.site-shell .fx-chart-kpi-value { color: var(--blue-dark); }

/* ---------- Sections ---------- */
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 16px; margin-bottom: 22px; flex-wrap: wrap; }
.topic-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.topic-row .fx-chip { cursor: pointer; }

/* ---------- Course cards ---------- */
.course-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 22px; }
.course-grid.three { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.course-card, .course-card .fx-card { height: 100%; }
.course-card .fx-card { border-radius: var(--radius); transition: transform 0.18s ease, box-shadow 0.18s ease; }
.course-card .fx-card:hover { transform: translateY(-4px); box-shadow: 0 16px 34px rgba(15, 27, 45, 0.16); }
.course-card .fx-card-image { aspect-ratio: 16 / 9; overflow: hidden; background: #e5e7eb; }
.course-card .fx-card-image img { width: 100%; height: 100%; object-fit: cover; }
.course-card .fx-card-body { padding: 0; flex: 1; display: flex; }
.cc-body { padding: 14px 16px 16px; display: flex; flex-direction: column; gap: 6px; width: 100%; }
.cc-badges { display: flex; gap: 6px; flex-wrap: wrap; }
.cc-title { font-weight: 700; font-size: 1.05rem; line-height: 1.3; color: var(--ink); text-decoration: none; }
.cc-title:hover { color: var(--red); }
.cc-sub { color: var(--muted); font-size: 0.88rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.cc-meta { display: flex; flex-wrap: wrap; gap: 4px 12px; font-size: 0.84rem; color: var(--ink-2); margin-top: 2px; }
.cc-topic { font-size: 0.8rem; color: var(--blue-dark); font-weight: 600; }
.cc-foot { margin-top: auto; padding-top: 10px; border-top: 1px solid var(--line); display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.cc-price strong { font-size: 1.2rem; display: block; line-height: 1.1; }
.cc-price span { font-size: 0.75rem; color: var(--muted); }
.site-shell .fx-button.start-btn { padding: 7px 12px; font-size: 0.9rem; white-space: nowrap; }

/* ---------- Learning paths ---------- */
.path-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(330px, 1fr)); gap: 22px; }
.path-card .fx-card { height: 100%; border-radius: var(--radius); border-top: 4px solid var(--blue); }
.path-card:nth-child(3n+2) .fx-card { border-top-color: var(--red); }
.path-card:nth-child(3n+3) .fx-card { border-top-color: #10b981; }
.path-card .fx-card-body { padding: 18px 20px; display: flex; flex-direction: column; height: 100%; }
.path-head { display: flex; justify-content: space-between; gap: 10px; align-items: flex-start; }
.path-head h3 { margin: 0; }
.path-aud { font-weight: 600; color: var(--blue-dark); font-size: 0.9rem; margin: 6px 0; }
.path-desc { color: var(--ink-2); font-size: 0.93rem; }
.path-steps { list-style: none; counter-reset: step; padding: 0; margin: 4px 0 16px; }
.path-steps li { counter-increment: step; display: flex; gap: 10px; align-items: center; padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 0.92rem; }
.path-steps li::before { content: counter(step); width: 24px; height: 24px; border-radius: 50%; background: var(--night); color: #fff; font-size: 0.75rem; display: inline-flex; align-items: center; justify-content: center; flex: none; }
.path-steps a { text-decoration: none; color: var(--ink); flex: 1; }
.path-steps a:hover { color: var(--red); }
.step-code { font-size: 0.75rem; font-weight: 700; color: var(--muted); }
.step-hours { font-size: 0.8rem; color: var(--muted); }
.path-card .fx-button { margin-top: auto; align-self: flex-start; }
.stage-courses { margin-top: 20px; }

/* ---------- Instructor ---------- */
.instructor-band { display: grid; grid-template-columns: auto 1fr; gap: 36px; align-items: center; }
.instructor-band .fx-avatar, .profile-body .fx-avatar { background: linear-gradient(135deg, var(--blue), var(--night)); color: #fff; font-weight: 700; }

/* ---------- CTA + footer ---------- */
.cta-band { background: linear-gradient(120deg, var(--red) 0%, #b5121a 100%); color: #fff; padding: 44px 0; }
.cta-band h2 { color: #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.cta-band .fx-button.btn-primary { background: #fff; color: var(--red); border-color: #fff; }
.cta-band .fx-button.btn-primary:hover:not(:disabled) { background: #fde8e8; }

.site-footer { background: var(--night); color: #b8c4d6; padding: 48px 0 20px; }
.footer-inner { width: min(1240px, calc(100% - 40px)); margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1.3fr; gap: 28px; }
.footer-logo { height: 44px; background: #fff; border-radius: 8px; padding: 4px 10px; margin-bottom: 12px; }
.footer-brand p { font-size: 0.9rem; max-width: 26rem; }
.footer-col { display: flex; flex-direction: column; gap: 6px; }
.footer-col h4 { color: #fff; margin: 0 0 6px; }
.footer-col a { color: #b8c4d6; text-decoration: none; font-size: 0.92rem; }
.footer-col a:hover { color: #fff; }
.footer-bottom { width: min(1240px, calc(100% - 40px)); margin: 32px auto 0; padding-top: 16px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 0.82rem; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero { background: linear-gradient(135deg, var(--night) 0%, var(--night-2) 100%); color: #fff; padding: 32px 0 40px; }
.page-hero h1 { color: #fff; }
.page-hero .lede { color: #d7e1f0; }
.page-hero .fx-breadcrumb a, .course-hero .fx-breadcrumb a { color: #c7d4ea; }
.page-hero .fx-breadcrumb, .course-hero .fx-breadcrumb { color: #9fb2cf; }

.page-hero .fx-breadcrumb-item.active .fx-breadcrumb-text, .course-hero .fx-breadcrumb-item.active .fx-breadcrumb-text,
.page-hero .fx-breadcrumb-item.active, .course-hero .fx-breadcrumb-item.active { color: #ffffff; font-weight: 600; }

/* ---------- Catalog filters ---------- */
.filter-panel { display: flex; flex-wrap: wrap; gap: 16px; align-items: flex-end; background: #fff; border: 1px solid var(--line); border-radius: var(--radius); padding: 18px; box-shadow: 0 4px 14px rgba(15,27,45,0.05); }
.field { display: flex; flex-direction: column; gap: 6px; }
.field.grow { flex: 1; min-width: 240px; }
.field label { font-weight: 600; font-size: 0.85rem; color: var(--ink-2); }
.result-bar { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin: 18px 0; color: var(--ink-2); }
.active-filters { display: flex; gap: 6px; flex-wrap: wrap; }

/* ---------- Course detail ---------- */
.course-hero { background: linear-gradient(135deg, var(--night) 0%, var(--night-2) 100%); color: #fff; padding: 30px 0 46px; }
.course-hero-inner { display: grid; grid-template-columns: 1fr 360px; gap: 40px; align-items: start; }
.course-hero h1 { color: #fff; font-size: 2.4rem; margin-top: 6px; }
.course-sub { font-size: 1.15rem; color: #c7d4ea; }
.course-summary { color: #e3eaf5; max-width: 46rem; }
.course-facts { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 12px; margin: 22px 0; }
.course-facts > div { background: rgba(255,255,255,0.07); border: 1px solid rgba(255,255,255,0.12); border-radius: 10px; padding: 10px 12px; }
.course-facts span { display: block; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; color: #9fb2cf; }
.course-facts strong { font-size: 0.98rem; }
.course-instructor { display: flex; align-items: center; gap: 10px; color: #c7d4ea; }
.course-instructor a { color: #fff; font-weight: 600; }
.enroll-card .fx-card { border-radius: var(--radius); color: var(--ink); }
.enroll-body { padding: 4px 2px; display: flex; flex-direction: column; gap: 8px; }
.enroll-price { font-size: 2rem; font-weight: 800; color: var(--ink); }
.enroll-price span { font-size: 0.9rem; font-weight: 500; color: var(--muted); }
.site-shell .fx-button.enroll-btn { width: 100%; padding: 11px 16px; font-size: 1rem; justify-content: center; }
.enroll-list { list-style: none; padding: 0; margin: 8px 0 0; font-size: 0.9rem; color: var(--ink-2); display: grid; gap: 4px; }

.course-tabs { background: #fff; border-radius: var(--radius); border: 1px solid var(--line); overflow: hidden; }
.tab-pad { padding: 8px 24px 24px; }
.two-col { display: grid; grid-template-columns: 1fr 320px; gap: 32px; }
.side-box { background: #f8fafc; border: 1px solid var(--line); border-radius: 12px; padding: 4px 18px 18px; align-self: start; margin-top: 16px; }
.chip-wrap { display: flex; flex-wrap: wrap; gap: 6px; }
.chip-wrap .fx-chip { border-radius: 8px; font-size: 0.82rem; line-height: 1.3; padding: 3px 9px; background: #fff; }
.chip-wrap .fx-chip button, .topic-row .fx-chip button, .hero-chips .fx-chip button { font-size: inherit; text-align: left; }
.filter-panel input { min-height: 36px; font-size: 0.95rem; }
.tool-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 8px; font-size: 0.9rem; }
.tool-list span { display: block; color: var(--muted); font-size: 0.82rem; }
.fact-list { margin: 0; padding-left: 1.2rem; }
.fact-list li { margin-bottom: 6px; }
.check-list { list-style: none; padding: 0; margin: 0; }
.check-list li { position: relative; padding: 6px 0 6px 30px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 6px; width: 20px; height: 20px; border-radius: 50%; background: #dcfce7; color: #15803d; font-weight: 700; font-size: 0.75rem; display: flex; align-items: center; justify-content: center; }
.lab-callout { margin-top: 10px; background: #fff7ed; border-left: 4px solid #f59e0b; padding: 8px 12px; border-radius: 6px; font-size: 0.93rem; }
.rubric { display: grid; gap: 8px; }
.rubric-row { display: grid; grid-template-columns: 200px 1fr; gap: 12px; background: #f8fafc; border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px; font-size: 0.93rem; }

/* ---------- Course player (Analytics Vidhya-style curriculum panel + slide stage) ---------- */
:root {
    --av-ink: #3b3e4f;
    --av-ink-2: #5d6070;
    --av-blue: #1e9be9;
    --av-panel: #f2f2f4;
    --av-line: #d6d8dd;
    --av-active: #d5d6da;
}
.player {
    display: grid; grid-template-columns: 380px minmax(0, 1fr);
    background: #fff; border: 1px solid var(--line); border-radius: 14px; overflow: hidden;
    box-shadow: 0 16px 40px rgba(15, 27, 45, 0.12);
    height: 820px;
}
.player-standalone { height: calc(100vh - 68px - 64px); min-height: 640px; border-radius: 0; border-left: none; border-right: none; box-shadow: none; }
.player-full { position: fixed; inset: 0; z-index: 4000; height: 100vh; border-radius: 0; border: none; }

.cp-panel { background: var(--av-panel); border-right: 1px solid var(--av-line); overflow-y: auto; padding: 14px 0 24px; font-family: "Lato", "Segoe UI", -apple-system, "Helvetica Neue", Arial, sans-serif; color: var(--av-ink); }
.cp-card { background: #fff; margin: 0 14px 0 0; border-radius: 0 6px 6px 0; padding: 22px 18px 20px; box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12); }
.cp-title { font-size: 1.55rem; line-height: 1.25; font-weight: 800; color: var(--av-ink); margin: 0 0 16px; letter-spacing: -0.01em; }
.cp-progress { height: 6px; background: #e3e5ea; border-radius: 3px; overflow: hidden; }
.cp-progress-fill { height: 100%; background: var(--av-blue); border-radius: 3px; transition: width 0.25s ease; }
.cp-complete { margin: 8px 0 18px; font-size: 1.05rem; color: var(--av-ink); }
.cp-complete strong { font-weight: 800; }
.site-shell .fx-button.cp-action {
    width: 100%; display: flex; align-items: center; justify-content: center; gap: 10px;
    background: var(--av-ink); color: #fff; border: none; border-radius: 4px; padding: 13px 14px;
    text-transform: uppercase; font-weight: 700; font-size: 0.92rem; letter-spacing: 0.01em; cursor: pointer;
}
.site-shell .fx-button.cp-action:hover:not(:disabled) { background: #2a2c39; }

/* Course outline: FlexCore TreeViewControl in Outline mode, themed to the AV panel */
.cp-note { margin: 12px 0 0; font-size: 0.86rem; color: var(--av-ink-2); }
.cp-note a { color: var(--av-blue); font-weight: 700; }
.site-shell .fx-button.cp-action:disabled { background: #8d909c; color: #f3f4f6; cursor: not-allowed; opacity: 1; }
.cp-outline {
    margin-top: 18px;
    --fx-tree-outline-ink: var(--av-ink);
    --fx-tree-outline-muted: var(--av-ink-2);
    --fx-tree-outline-accent: var(--av-blue);
    --fx-tree-outline-selected-bg: var(--av-active);
    --fx-tree-outline-hover-bg: #e7e8eb;
    --fx-tree-outline-divider: var(--av-line);
    --fx-tree-outline-inset: 12px;
}
.cp-outline .fx-treeview-search { margin: 0 14px 8px 10px; }
.cp-outline .fx-treeview-outline { font-size: 1rem; }

.cp-main { display: flex; flex-direction: column; min-width: 0; min-height: 0; padding: 16px 20px 12px; outline: none; overflow-y: auto; }
.cp-main:focus-visible { box-shadow: inset 0 0 0 3px var(--blue); }
.cp-lesson-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.cp-lesson-head h3 { margin: 2px 0 4px; font-size: 1.35rem; color: var(--av-ink); }
.lesson-type { display: inline-flex; align-items: center; gap: 6px; font-size: 0.74rem; letter-spacing: 0.03em; color: var(--av-ink-2); }
.cp-body { flex: 1; min-height: 0; display: flex; flex-direction: column; }
.cp-body-text, .cp-body-video, .cp-body-downloads, .cp-body-quiz { overflow-y: auto; padding-right: 6px; }
.lesson-text { max-width: 860px; color: #273043; line-height: 1.6; font-size: 1rem; }
.lesson-text h2, .lesson-text h3 { color: var(--av-ink); margin: 1.2em 0 0.4em; }
.lesson-text h2 { font-size: 1.25rem; } .lesson-text h3 { font-size: 1.08rem; }
.lesson-text table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 0.9rem; }
.lesson-text th, .lesson-text td { border: 1px solid #d6d8dd; padding: 6px 8px; text-align: left; vertical-align: top; }
.lesson-text th { background: #f2f2f4; }
.lesson-text pre { background: #0f1b2d; color: #e5edf7; padding: 12px 14px; border-radius: 8px; overflow-x: auto; font-size: 0.82rem; line-height: 1.45; }
.lesson-text code { font-size: 0.88em; }
.lesson-text :not(pre) > code { background: #eef1f6; padding: 1px 5px; border-radius: 4px; }
.lesson-script { margin-top: 18px; border-top: 1px solid var(--av-line); padding-top: 8px; }
.lesson-script h4 { color: var(--av-ink-2); text-transform: uppercase; font-size: 0.78rem; letter-spacing: 0.06em; }
.lesson-video-wrap { background: #0b1220; border-radius: 8px; overflow: hidden; }
.lesson-video { display: block; width: 100%; max-height: 520px; background: #000; }
.video-soon { aspect-ratio: 16 / 7; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: #dbe4f0; text-align: center; padding: 24px; }
.video-soon h4 { color: #fff; font-size: 1.4rem; margin: 6px 0 0; }
.video-soon p { margin: 0; max-width: 520px; color: #b8c4d6; }
.video-soon code { margin-top: 6px; font-size: 0.75rem; color: #8ea0b8; }
.download-list { list-style: none; margin: 12px 0; padding: 0; max-width: 760px; }
.download-list li { display: grid; grid-template-columns: 40px 1fr auto; align-items: center; gap: 12px; padding: 12px 14px; border: 1px solid var(--av-line); border-radius: 8px; margin-bottom: 8px; background: #fff; }
.dl-icon { color: var(--av-blue); display: inline-flex; justify-content: center; }
.dl-text { display: flex; flex-direction: column; }
.dl-text small { color: var(--av-ink-2); font-size: 0.78rem; }
.dl-link { display: inline-flex; align-items: center; gap: 6px; font-weight: 700; color: var(--av-blue); text-decoration: none; padding: 6px 10px; border-radius: 6px; }
.dl-link:hover { background: #eaf5fd; }
.slide-bar { display: flex; align-items: center; gap: 10px; margin-top: 10px; }
.slide-bar .sv-thumbs { flex: 1; padding: 4px 2px; }
.slide-bar .sv-counter small { color: var(--av-ink-2); }
.lesson-nav { border-top: 1px solid var(--av-line); padding-top: 12px; }
.site-shell .fx-button.btn-complete { display: inline-flex; align-items: center; gap: 8px; border: 2px solid var(--av-blue); background: #fff; color: var(--av-blue); font-weight: 700; padding: 7px 16px; border-radius: 6px; }
.site-shell .fx-button.btn-complete.done { background: var(--av-blue); color: #fff; }
.complete-state { display: inline-flex; align-items: center; gap: 8px; color: var(--av-ink-2); font-size: 0.92rem; }
.complete-state.done { color: #0f7b3f; font-weight: 700; }

/* Quiz */
.quiz { max-width: 880px; }
.quiz-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; }
.quiz-head h4 { margin: 0 0 2px; font-size: 1.15rem; color: var(--av-ink); text-transform: none; letter-spacing: 0; }
.quiz-questions { list-style: none; padding: 0; margin: 12px 0; }
.quiz-q { border: 1px solid var(--av-line); border-radius: 8px; padding: 14px 16px; margin-bottom: 12px; background: #fff; }
.quiz-q-meta { font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--av-ink-2); font-weight: 700; }
.quiz-q-text { margin: 6px 0 10px; font-weight: 600; color: var(--av-ink); }
.quiz-submit { display: flex; justify-content: flex-end; align-items: center; gap: 14px; margin: 8px 0 18px; }
.quiz-score { display: grid; grid-template-columns: auto 1fr auto; gap: 18px; align-items: center; padding: 16px 18px; border-radius: 10px; margin: 12px 0; }
.quiz-score p { margin: 2px 0 0; font-size: 0.9rem; }
.quiz-score.pass { background: #e8f6ee; border: 1px solid #9ad3b2; color: #0f5132; }
.quiz-score.fail { background: #fff6e5; border: 1px solid #f0c36d; color: #7a4b00; }
.quiz-score-num { font-size: 2.1rem; font-weight: 800; line-height: 1; }
.quiz-feedback { list-style: none; padding: 0; margin: 8px 0 18px; }
.quiz-feedback li { display: grid; grid-template-columns: 28px 1fr; gap: 10px; padding: 12px 14px; border-radius: 8px; margin-bottom: 8px; border: 1px solid var(--av-line); background: #fff; }
.quiz-feedback li.correct { border-left: 4px solid #1f9d55; }
.quiz-feedback li.incorrect { border-left: 4px solid #d93025; }
.qf-mark { width: 24px; height: 24px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; color: #fff; }
.correct .qf-mark { background: #1f9d55; } .incorrect .qf-mark { background: #d93025; }
.qf-q { font-weight: 600; color: var(--av-ink); }
.qf-n { color: var(--av-ink-2); font-weight: 800; margin-right: 4px; }
.qf-line { font-size: 0.9rem; margin-top: 4px; }
.qf-tag { font-size: 0.7rem; text-transform: uppercase; font-weight: 800; letter-spacing: 0.05em; margin-left: 6px; }
.correct .qf-tag { color: #1f9d55; } .incorrect .qf-tag { color: #d93025; }
.qf-why { margin-top: 6px; font-size: 0.9rem; color: #3d4556; background: #f6f7f9; border-radius: 6px; padding: 8px 10px; }
.quiz-history-title { margin: 18px 0 8px; color: var(--av-ink); }
.cp-crumb { font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; font-weight: 700; color: var(--av-blue); }
.sv-group { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.sv-stage-wrap { display: grid; grid-template-columns: minmax(0, 1fr); gap: 12px; flex: 1; min-height: 0; }
.sv-stage-wrap.with-notes { grid-template-columns: minmax(0, 1fr) 300px; }
.sv-stage { position: relative; background: #0b1220; border-radius: 8px; overflow: hidden; min-height: 0; display: flex; align-items: center; justify-content: center; }
.sv-image { display: block; max-width: 100%; max-height: 100%; width: 100%; height: 100%; object-fit: contain; }
.sv-preload { display: none; }
.player button.sv-hit { position: absolute; top: 0; bottom: 0; width: 22%; border: none; cursor: pointer; padding: 0; opacity: 0; z-index: 2; }
.player button.sv-hit:hover:not(:disabled) { opacity: 1; }
.player button.sv-hit-left { left: 0; cursor: w-resize; background: linear-gradient(90deg, rgba(0,0,0,0.25), transparent); }
.player button.sv-hit-right { right: 0; cursor: e-resize; background: linear-gradient(270deg, rgba(0,0,0,0.25), transparent); }
.player button.sv-hit:disabled { display: none; }
.sv-notes { background: #f8fafc; color: var(--av-ink); border-radius: 8px; padding: 12px 16px; overflow-y: auto; font-size: 0.92rem; border: 1px solid var(--line); }
.sv-notes h4 { color: var(--av-ink-2); margin-top: 4px; }
.cp-nav { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-top: 12px; }
.cp-nav-mid { display: flex; align-items: center; gap: 14px; flex: 1; justify-content: center; }
.sv-counter { font-variant-numeric: tabular-nums; min-width: 110px; text-align: center; color: var(--av-ink); }
.sv-slider { flex: 1; max-width: 360px; }
.site-shell .fx-button.sv-btn { padding: 7px 14px; font-size: 0.92rem; }
.sv-thumbs { display: flex; gap: 8px; overflow-x: auto; padding: 12px 2px 4px; scrollbar-width: thin; flex: none; }
.player button.sv-thumb { position: relative; flex: none; width: 112px; padding: 0; border: 2px solid transparent; border-radius: 6px; overflow: hidden; background: #000; cursor: pointer; opacity: 0.7; }
.player button.sv-thumb img { display: block; width: 100%; height: 63px; object-fit: cover; }
.player button.sv-thumb:hover { opacity: 1; }
.player button.sv-thumb.active { border-color: var(--red); opacity: 1; }
.sv-thumb-n { position: absolute; left: 4px; bottom: 3px; background: rgba(0,0,0,0.7); color: #fff; font-size: 0.7rem; padding: 0 5px; border-radius: 4px; }
.sv-hint { color: var(--muted); font-size: 0.78rem; margin: 6px 2px 0; }

.learn-bar { display: flex; align-items: center; gap: 14px; height: 64px; padding: 0 20px; background: #fff; border-bottom: 1px solid var(--line); }
.learn-title { font-size: 1.15rem; margin: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.learn-meta { margin-left: auto; color: var(--muted); font-size: 0.9rem; white-space: nowrap; }
.learn-wrap + * { display: none; }

@media (max-width: 1100px) {
    .player, .player-standalone { grid-template-columns: 1fr; height: auto; }
    .cp-panel { max-height: 420px; }
    .sv-stage { aspect-ratio: 16 / 9; }
    .sv-stage-wrap.with-notes { grid-template-columns: 1fr; }
    .learn-meta { display: none; }
}

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 340px 1fr; gap: 40px; align-items: start; }
.about-profile .fx-card { border-radius: var(--radius); }
.profile-body { display: flex; flex-direction: column; align-items: center; text-align: center; padding: 16px 8px; }
.profile-body h2 { margin-top: 14px; }
.profile-logo { height: 40px; margin-top: 16px; }

#blazor-error-ui { background: #fff6e8; bottom: 0; box-shadow: 0 -1px 2px rgba(0,0,0,0.2); display: none; left: 0; padding: 0.6rem 1.25rem; position: fixed; width: 100%; z-index: 10000; }
#blazor-error-ui .dismiss { cursor: pointer; position: absolute; right: 0.75rem; top: 0.5rem; }

@media (max-width: 960px) {
    .hero-inner, .course-hero-inner, .two-col, .about-grid, .instructor-band { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .hero h1 { font-size: 2.6rem; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-inner { grid-template-columns: 1fr 1fr; }
    .nav-links { display: none; }
}

/* Anchors land below the sticky header; tighten the gap between the viewer and the tabs. */
[id] { scroll-margin-top: 84px; }
.section.tight-top { padding-top: 0; }


/* ---------- Sign-in, user chip ---------- */
.site-shell .fx-button.signin-btn { padding: 7px 14px; margin-left: 8px; }
.user-chip { display: inline-flex; align-items: center; gap: 8px; margin-left: 12px; font-size: 0.9rem; color: var(--ink); }
.avatar { width: 32px; height: 32px; border-radius: 50%; background: var(--blue); color: #fff; display: inline-flex; align-items: center; justify-content: center; font-weight: 800; font-size: 0.8rem; flex: none; }
.avatar.instructor { background: var(--red); }
.signin .lead { max-width: 760px; }
.persona-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 14px; margin: 12px 0 24px; }
.persona { display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.persona small { display: block; color: var(--muted); }
.signin-form { display: grid; gap: 12px; max-width: 420px; }
.signin-form label { display: grid; gap: 4px; font-weight: 600; font-size: 0.9rem; }
.signed-in { display: flex; align-items: center; gap: 12px; }

/* ---------- Certificate (printable) ---------- */
.cert-page { padding: 24px 16px 48px; background: #eef1f6; }
.cert-actions { max-width: 1000px; margin: 0 auto 14px; display: flex; justify-content: space-between; }
.certificate { max-width: 1000px; margin: 0 auto; background: #fff; padding: 18px; box-shadow: 0 8px 30px rgba(15, 27, 45, 0.15); aspect-ratio: 1.414 / 1; }
.cert-border { height: 100%; box-sizing: border-box; border: 3px solid var(--night); outline: 1px solid var(--red); outline-offset: -10px; padding: 34px 56px; display: flex; flex-direction: column; align-items: center; text-align: center; }
.cert-logo { height: 54px; }
.cert-kicker { margin-top: 10px; letter-spacing: 0.3em; text-transform: uppercase; font-size: 0.8rem; color: var(--blue); font-weight: 700; }
.cert-title { font-family: Georgia, "Times New Roman", serif; font-size: 2.6rem; color: var(--night); margin: 6px 0 14px; }
.cert-presented { margin: 4px 0; color: #4b5563; font-style: italic; }
.cert-name { font-family: Georgia, "Times New Roman", serif; font-size: 2.3rem; color: var(--red); border-bottom: 1px solid #cbd5e1; padding: 0 30px 4px; margin: 4px 0 8px; }
.cert-course { font-size: 1.35rem; font-weight: 800; color: var(--night); max-width: 760px; }
.cert-meta { color: #4b5563; font-size: 0.92rem; }
.cert-foot { margin-top: auto; width: 100%; display: grid; grid-template-columns: 1fr auto 1fr; align-items: end; gap: 24px; }
.cert-sign small { color: #4b5563; }
.cert-signature { font-family: "Brush Script MT", "Segoe Script", cursive; font-size: 1.9rem; color: var(--night); }
.cert-date { font-size: 1.05rem; font-weight: 700; color: var(--night); }
.cert-line { border-top: 1px solid #94a3b8; margin: 4px 20px; }
.cert-seal { color: var(--red); }
.cert-number { margin-top: 14px; font-size: 0.75rem; color: #6b7280; letter-spacing: 0.04em; }
.cert-checklist li.ok { color: #0f7b3f; font-weight: 700; }
@media print {
    @page { size: landscape; margin: 0.4in; }
    .top-bar, .site-footer, .no-print, .skip-link, #blazor-error-ui { display: none !important; }
    .cert-page { background: #fff; padding: 0; }
    .certificate { box-shadow: none; max-width: none; }
}

/* ---------- Instructor results ---------- */
.results-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 18px; flex-wrap: wrap; }
.results h2 { margin: 26px 0 10px; font-size: 1.2rem; }
.stat-row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; margin-top: 16px; }
.stat { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.stat span { display: block; font-size: 1.7rem; font-weight: 800; color: var(--night); }
.stat small { color: var(--muted); }
.accuracy-list { list-style: none; padding: 0; margin: 0; border: 1px solid var(--line); border-radius: 10px; background: #fff; }
.accuracy-list li { display: grid; grid-template-columns: minmax(0, 1fr) 180px 60px 50px 150px; gap: 12px; align-items: center; padding: 8px 14px; border-bottom: 1px solid #eef0f3; font-size: 0.88rem; }
.accuracy-list li:last-child { border-bottom: none; }
.acc-q small { color: var(--muted); margin: 0 4px; }
.acc-bar { height: 10px; background: #eef0f3; border-radius: 5px; overflow: hidden; }
.acc-fill { display: block; height: 100%; background: #1f9d55; }
.acc-fill.mid { background: #e0a100; } .acc-fill.low { background: #d93025; }
.acc-num { font-weight: 800; text-align: right; } .acc-n { color: var(--muted); text-align: right; } .acc-wrong { color: #a14a00; font-size: 0.8rem; }
@media (max-width: 900px) { .stat-row { grid-template-columns: repeat(2, 1fr); } .accuracy-list li { grid-template-columns: 1fr 80px 50px; } .acc-n, .acc-wrong { display: none; } }

.results, .quiz { --fx-grid-font-size: 13px; --fx-font-size: 0.9rem; }
.dl-links { display: inline-flex; gap: 4px; }
.user-chip { white-space: nowrap; }

/* ---------- Course materials strip (course page) ---------- */
.course-materials { display: grid; grid-template-columns: repeat(auto-fill, minmax(118px, 1fr)); gap: 10px; margin: -8px 0 22px; }
.course-materials a { display: flex; flex-direction: column; text-decoration: none; color: #fff; background: rgba(237,29,36,0.12); border: 1px solid rgba(237,29,36,0.35); border-radius: 10px; padding: 9px 12px; }
.course-materials a:hover { background: rgba(237,29,36,0.22); color: #fff; }
.course-materials strong { font-size: 1.35rem; line-height: 1.1; }
.course-materials span { font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.06em; color: #e3e9f3; font-weight: 700; }
.course-materials small { font-size: 0.72rem; color: #9fb2cf; }

/* ---------- Quiz: timer and choose-two ---------- */
.quiz-start { display: grid; gap: 12px; justify-items: start; margin: 10px 0 18px; }
.quiz-timer { position: sticky; top: 0; z-index: 3; display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 4px 10px; background: #fff; border: 1px solid var(--av-line); border-radius: 8px; padding: 8px 12px; margin-bottom: 12px; color: var(--av-ink); }
.quiz-timer strong { font-variant-numeric: tabular-nums; font-size: 1.05rem; }
.quiz-timer .quiz-timer-bar { grid-column: 1 / -1; }
.quiz-timer.low { border-color: var(--red); color: var(--red-dark); }
.quiz-multi { display: grid; gap: 8px; }
.quiz-multi-count { font-size: 0.8rem; }

/* ---------- Activities lesson ---------- */
.activities { display: grid; gap: 16px; }
.act-signin { margin: 0; }
.act-toc { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 0.88rem; }
.act-toc-item { text-decoration: none; color: var(--av-ink); display: inline-flex; align-items: center; gap: 6px; }
.act-card { border: 1px solid var(--av-line); border-radius: 10px; background: #fff; padding: 14px 18px 16px; scroll-margin-top: 12px; }
.act-head { display: flex; flex-wrap: wrap; align-items: center; gap: 6px 10px; }
.act-head h4 { margin: 0; font-size: 1.05rem; color: var(--av-ink); flex: 1 1 260px; }
.act-meta { font-size: 0.75rem; color: var(--av-ink-2); text-transform: uppercase; letter-spacing: 0.04em; }
.act-kind { font-size: 0.68rem; font-weight: 800; text-transform: uppercase; letter-spacing: 0.06em; padding: 2px 8px; border-radius: 99px; background: #eef2f8; color: var(--blue-dark); white-space: nowrap; }
.act-kind-poll { background: #e8f4fd; color: #126aa3; }
.act-kind-sort { background: #eef8ee; color: #2e7d32; }
.act-kind-scenario { background: #fff3e0; color: #b45309; }
.act-kind-reflection { background: #f3e8ff; color: #6b21a8; }
.act-kind-prompt-improve { background: #fdecec; color: var(--red-dark); }
.act-instructions { color: var(--av-ink-2); font-size: 0.92rem; margin: 8px 0; }
.act-body { display: grid; gap: 10px; }
.act-question { font-weight: 600; color: var(--av-ink); margin: 4px 0; }
.act-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; }
.act-tally h5, .act-sample h5, .act-model h5, .act-weak h5, .act-check h5 { margin: 4px 0 6px; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--av-ink-2); }
.act-tally-row { display: grid; grid-template-columns: minmax(160px, 2fr) 3fr 32px; gap: 10px; align-items: center; font-size: 0.86rem; margin: 3px 0; }
.act-tally-bar { height: 10px; background: #eef0f3; border-radius: 6px; overflow: hidden; }
.act-tally-bar span { display: block; height: 100%; background: var(--av-blue); }
.act-tally-row.is-correct .act-tally-bar span { background: #2e7d32; }
.act-tally-n { text-align: right; font-variant-numeric: tabular-nums; }
.act-discussion { background: #f7f8fb; border-left: 3px solid var(--av-blue); padding: 8px 12px; margin: 0; font-size: 0.92rem; }
.act-buckets { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; font-size: 0.85rem; color: var(--av-ink-2); }
.act-bucket { background: #eef2f8; border-radius: 6px; padding: 2px 8px; font-weight: 600; color: var(--av-ink); }
.act-sort { margin: 0; padding-left: 22px; display: grid; gap: 10px; }
.act-sort li { padding: 6px 8px; border-radius: 6px; }
.act-sort li.correct { background: #f0f8f0; }
.act-sort li.incorrect { background: #fdf2f2; }
.act-sort-text { display: block; margin-bottom: 4px; color: var(--av-ink); }
.act-sort-fb { font-size: 0.86rem; color: var(--av-ink-2); margin-top: 4px; display: flex; gap: 6px; align-items: baseline; }
.act-steps { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.act-step { border-left: 3px solid var(--av-line); padding: 4px 0 4px 12px; }
.act-step.done { opacity: 0.92; }
.act-situation { margin: 0 0 8px; color: var(--av-ink); }
.act-options { display: grid; gap: 8px; }
.site-shell .fx-button.act-option { justify-content: flex-start; text-align: left; white-space: normal; height: auto; padding: 8px 12px; }
.act-choice { display: flex; gap: 6px; align-items: baseline; font-size: 0.92rem; }
.act-choice.correct { color: #2e7d32; }
.act-choice.incorrect { color: var(--red-dark); }
.act-step-fb { margin: 4px 0 0; font-size: 0.9rem; color: var(--av-ink-2); }
.act-guide { margin: 0; padding-left: 20px; font-size: 0.9rem; color: var(--av-ink-2); }
.act-textarea { width: 100%; }
.act-sample, .act-model { background: #f7f8fb; border-radius: 8px; padding: 8px 12px; }
.act-sample p { margin: 0; }
.act-weak pre, .act-model pre { white-space: pre-wrap; margin: 0; font-size: 0.88rem; background: #fff; border: 1px solid var(--av-line); border-radius: 6px; padding: 8px 10px; }
.act-context { font-size: 0.88rem; color: var(--av-ink-2); margin: 0; }
.act-hints summary { cursor: pointer; font-weight: 600; color: var(--blue-dark); }
.act-check { display: grid; gap: 6px; }

/* practice exam: compact one-row sticky timer that never covers the question you scrolled to */
.quiz-timer { display: flex; align-items: center; gap: 14px; top: 8px; margin: 0 0 20px; padding: 8px 14px; box-shadow: 0 0 0 8px #fff, 0 8px 14px -8px rgba(15, 23, 42, .35); }
.quiz-timer .quiz-timer-label { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.quiz-timer .fx-progress.quiz-timer-bar { flex: 1; display: flex; align-items: center; gap: 10px; margin: 0; padding: 0; border: 0; background: none; box-shadow: none; }
.quiz-timer .quiz-timer-bar .fx-progress-track { flex: 1; margin: 0; }
.quiz-timer .quiz-timer-bar .fx-progress-detail { margin: 0; font-variant-numeric: tabular-nums; min-width: 3.2em; text-align: right; }
.quiz-q { scroll-margin-top: 96px; }
/* lab guides: instructor-only blocks (instructors only; stripped server-side for learners) */
details.instructor-only { border: 1px dashed var(--av-line); border-left: 4px solid var(--red, #c8102e); border-radius: 8px; background: #fff8f0; padding: 8px 14px; margin: 12px 0; }
details.instructor-only > summary { cursor: pointer; font-weight: 600; color: var(--av-ink); }
details.instructor-only[open] > summary { margin-bottom: 8px; }
.instructor-hidden-note { font-size: .85rem; margin: 0 0 8px; }