:root {
    --learn-navy: #10233c;
    --learn-navy-deep: #0b1a2e;
    --learn-ink: #16324f;
    --learn-muted: #5b6f86;
    --learn-line: #d7e1ec;
    --learn-paper: #f4f7fb;
    --learn-card: #ffffff;
    --learn-teal: #0d8a7b;
    --learn-teal-soft: #e4f6f3;
    --learn-blue: #2563eb;
    --learn-blue-soft: #e8efff;
    --learn-amber: #b45309;
    --learn-amber-soft: #fff4e5;
    --learn-rose: #b42318;
    --learn-rose-soft: #fdecea;
    --learn-violet: #6d28d9;
    --learn-focus: #2563eb;
    --learn-radius: 16px;
    --learn-shadow: 0 16px 40px rgba(16, 35, 60, 0.08);
    --learn-font: "Source Sans 3", "Segoe UI", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
    margin: 0;
    min-height: 100%;
    background: var(--learn-paper);
    color: var(--learn-ink);
    font-family: var(--learn-font);
    font-size: 16px;
    line-height: 1.5;
}

button, input, select, textarea { font: inherit; }

.learn-skip {
    position: absolute;
    left: 12px;
    top: -40px;
    z-index: 20;
    background: #fff;
    color: var(--learn-navy);
    padding: 8px 12px;
    border-radius: 8px;
}
.learn-skip:focus { top: 12px; }

.learn-shell {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    min-height: 100vh;
}

.learn-rail {
    background: var(--learn-navy-deep);
    color: #dce7f3;
    padding: 22px 18px 18px;
    display: flex;
    flex-direction: column;
    gap: 18px;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow: auto;
}

.learn-brand p { margin: 4px 0 0; color: #9db0c6; font-size: 14px; }
.learn-logo {
    color: #fff;
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.02em;
    font-size: 18px;
}
.learn-version { font-size: 12px !important; }

.learn-progress__meta {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    margin-bottom: 8px;
}
.learn-progress__track {
    height: 8px;
    border-radius: 999px;
    background: rgba(255,255,255,.12);
    overflow: hidden;
}
.learn-progress__track span {
    display: block;
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, #2dd4bf, #60a5fa);
    transition: width .25s ease;
}

.learn-nav { display: flex; flex-direction: column; gap: 16px; }
.learn-part { margin: 0; }
.learn-part__title {
    margin: 0 0 8px;
    font-size: 11px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: #8aa0b8;
}
.learn-part__list { list-style: none; margin: 0; padding: 0; display: grid; gap: 4px; }
.learn-nav-btn {
    width: 100%;
    text-align: left;
    border: 0;
    background: transparent;
    color: #d5e2f0;
    border-radius: 10px;
    padding: 8px 10px;
    display: flex;
    gap: 8px;
    align-items: flex-start;
    cursor: pointer;
}
.learn-nav-btn:hover { background: rgba(255,255,255,.06); }
.learn-nav-btn.is-current { background: rgba(255,255,255,.12); color: #fff; }
.learn-nav-btn.is-done { color: #b7f0e4; }
.learn-nav-btn small { display: block; color: #8aa0b8; font-size: 12px; }
.learn-dot {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    border: 1.5px solid #6d8299;
    flex: 0 0 18px;
    margin-top: 2px;
    display: grid;
    place-items: center;
    font-size: 10px;
}
.learn-nav-btn.is-done .learn-dot { background: #0d8a7b; border-color: #0d8a7b; color: #fff; }
.learn-nav-btn.is-current .learn-dot { border-color: #7dd3fc; }

.learn-rail-foot { margin-top: auto; color: #8aa0b8; font-size: 12px; }
.learn-text-btn {
    background: none;
    border: 0;
    color: #9fd8cf;
    padding: 0 0 8px;
    cursor: pointer;
    text-decoration: underline;
}

.learn-stage { display: flex; flex-direction: column; min-width: 0; }
.learn-top {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 22px;
    background: #fff;
    border-bottom: 1px solid var(--learn-line);
    position: sticky;
    top: 0;
    z-index: 3;
}
.learn-top__crumb span { display: block; font-size: 12px; color: var(--learn-muted); }
.learn-top__crumb strong { font-size: 15px; }
.learn-top__tools { margin-left: auto; display: flex; gap: 10px; align-items: center; }
.learn-icon-btn {
    display: none;
    border: 1px solid var(--learn-line);
    background: #fff;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
}
.learn-pill {
    background: var(--learn-blue-soft);
    color: var(--learn-blue);
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
}
.learn-ghost {
    color: var(--learn-teal);
    font-weight: 600;
    text-decoration: none;
    font-size: 14px;
}

.learn-main {
    padding: 22px;
    display: grid;
    grid-template-columns: minmax(280px, 380px) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}
.learn-coach, .learn-practice {
    background: var(--learn-card);
    border: 1px solid var(--learn-line);
    border-radius: var(--learn-radius);
    box-shadow: var(--learn-shadow);
}
.learn-coach { padding: 22px 22px 18px; }
.learn-kicker {
    margin: 0 0 6px;
    font-size: 12px;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--learn-teal);
    font-weight: 700;
}
.learn-coach h1, .learn-practice h2 { margin: 0 0 8px; font-size: 28px; line-height: 1.2; }
.learn-lead { margin: 0 0 14px; color: var(--learn-muted); }
.learn-teach { display: grid; gap: 10px; }
.learn-teach p, .learn-teach li { margin: 0; }
.learn-teach ol, .learn-teach ul { padding-left: 18px; margin: 0; display: grid; gap: 6px; }
.learn-remember {
    margin-top: 16px;
    background: var(--learn-amber-soft);
    border-radius: 12px;
    padding: 12px 14px;
    color: #7a3e04;
}
.learn-remember strong { display: block; margin-bottom: 4px; }
.learn-feedback {
    margin-top: 14px;
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--learn-teal-soft);
    color: #0b5c52;
}
.learn-feedback.is-error { background: var(--learn-rose-soft); color: var(--learn-rose); }

.learn-practice { overflow: hidden; }
.learn-practice__head {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    padding: 18px 20px 0;
}
.learn-practice__head p { margin: 0; color: var(--learn-muted); }
.learn-badge {
    align-self: flex-start;
    background: var(--learn-navy);
    color: #fff;
    border-radius: 999px;
    padding: 4px 10px;
    font-size: 11px;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.learn-canvas { padding: 16px 20px 20px; }

.learn-foot {
    margin-top: auto;
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 22px 18px;
    border-top: 1px solid var(--learn-line);
    background: #fff;
    position: sticky;
    bottom: 0;
}
.learn-foot__status { margin: 0 auto; color: var(--learn-muted); font-size: 14px; text-align: center; }

.learn-btn {
    border: 0;
    border-radius: 12px;
    padding: 11px 16px;
    font-weight: 700;
    cursor: pointer;
}
.learn-btn:disabled { opacity: .45; cursor: not-allowed; }
.learn-btn--primary { background: var(--learn-teal); color: #fff; }
.learn-btn--ghost { background: #edf2f7; color: var(--learn-ink); }
.learn-btn--danger { background: var(--learn-rose); color: #fff; }
.learn-btn--tiny { padding: 7px 10px; font-size: 13px; border-radius: 9px; }

.learn-scrim {
    position: fixed;
    inset: 0;
    background: rgba(11, 26, 46, .45);
    z-index: 20;
}
.learn-modal {
    position: fixed;
    z-index: 21;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: min(420px, calc(100vw - 32px));
    background: #fff;
    border-radius: 16px;
    padding: 22px;
    box-shadow: var(--learn-shadow);
}
.learn-modal__actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }

/* Mock chrome */
.mock {
    border: 1px solid var(--learn-line);
    border-radius: 14px;
    overflow: hidden;
    background: #f8fafc;
}
.mock-bar {
    background: var(--learn-navy);
    color: #fff;
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}
.mock-bar small { color: #9db0c6; }
.mock-body { padding: 14px; display: grid; gap: 12px; }
.mock-admin { background: linear-gradient(180deg, #f3f6fb, #eef3f8); }

.mock-field { display: grid; gap: 4px; }
.mock-field span, .mock-field label { font-size: 13px; font-weight: 600; }
.mock-field small { color: var(--learn-muted); font-weight: 400; }
.mock-input, .mock-select, .mock-textarea {
    width: 100%;
    border: 1px solid #c9d6e4;
    border-radius: 10px;
    padding: 9px 11px;
    background: #fff;
}
.mock-input:focus, .mock-select:focus, .mock-textarea:focus, .learn-nav-btn:focus-visible, .learn-btn:focus-visible, .learn-choice:focus-within, .learn-icon-btn:focus-visible {
    outline: 3px solid rgba(37, 99, 235, .28);
    outline-offset: 1px;
}
.mock-grid { display: grid; gap: 10px; }
.mock-grid.is-2 { grid-template-columns: 1fr 1fr; }
.mock-grid.is-3 { grid-template-columns: repeat(3, 1fr); }
.mock-note {
    background: #e8f4ff;
    border-radius: 10px;
    padding: 10px 12px;
    font-size: 14px;
}
.mock-kpis { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 8px; }
.mock-kpi {
    background: #fff;
    border: 1px solid var(--learn-line);
    border-radius: 12px;
    padding: 10px;
}
.mock-kpi span { display: block; font-size: 12px; color: var(--learn-muted); }
.mock-kpi strong { font-size: 20px; }

.learn-choice, .learn-check {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    border: 1px solid var(--learn-line);
    border-radius: 12px;
    padding: 10px 12px;
    background: #fff;
    cursor: pointer;
}
.learn-choice.is-on, .learn-toggle.is-on {
    border-color: #7dd3c7;
    background: var(--learn-teal-soft);
}
.learn-choice input, .learn-check input { margin-top: 3px; }

.learn-toggle {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border: 1px solid var(--learn-line);
    border-radius: 12px;
    padding: 12px;
    background: #fff;
}
.learn-switch {
    width: 46px;
    height: 26px;
    border-radius: 999px;
    border: 0;
    background: #c5d0dc;
    position: relative;
    cursor: pointer;
}
.learn-switch::after {
    content: "";
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: #fff;
    top: 3px;
    left: 3px;
    transition: left .15s ease;
}
.learn-toggle.is-on .learn-switch { background: var(--learn-teal); }
.learn-toggle.is-on .learn-switch::after { left: 23px; }

.mock-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; }
.mock-table th, .mock-table td { padding: 8px 10px; border-bottom: 1px solid var(--learn-line); text-align: left; font-size: 14px; }
.mock-table th { font-size: 12px; color: var(--learn-muted); background: #f7fafc; }

.mark-row { display: flex; gap: 4px; flex-wrap: wrap; }
.mark-chip {
    border: 1px solid var(--learn-line);
    background: #fff;
    border-radius: 999px;
    padding: 4px 8px;
    font-size: 12px;
    cursor: pointer;
}
.mark-chip.is-present { background: #dcfce7; border-color: #86efac; }
.mark-chip.is-late { background: #fef3c7; border-color: #fcd34d; }
.mark-chip.is-absent { background: #fee2e2; border-color: #fca5a5; }
.mark-chip.is-excused { background: #e0e7ff; border-color: #a5b4fc; }

.quiz-option {
    width: 100%;
    text-align: left;
    border: 1px solid var(--learn-line);
    background: #fff;
    border-radius: 12px;
    padding: 10px 12px;
    cursor: pointer;
}
.quiz-option.is-right { background: var(--learn-teal-soft); border-color: #7dd3c7; }
.quiz-option.is-wrong { background: var(--learn-rose-soft); border-color: #f5b5b0; }

.hotspot {
    border: 1px dashed #94a3b8;
    background: #fff;
    border-radius: 10px;
    padding: 10px 12px;
    text-align: left;
    cursor: pointer;
    width: 100%;
}
.hotspot.is-target { border-style: solid; border-color: #38bdf8; box-shadow: 0 0 0 3px rgba(56, 189, 248, .2); }
.hotspot.is-done { background: var(--learn-teal-soft); border-color: #0d8a7b; }

.scan-box {
    min-height: 120px;
    border-radius: 14px;
    background: #0b1a2e;
    color: #9fd8cf;
    display: grid;
    place-items: center;
    text-align: center;
    padding: 16px;
}
.scan-result { background: #fff; border-radius: 12px; padding: 12px; border: 1px solid var(--learn-line); }

.milestone { display: flex; gap: 10px; align-items: flex-start; padding: 8px 0; }
.milestone i { color: #94a3b8; margin-top: 3px; }
.milestone.is-done i { color: var(--learn-teal); }

.school-tile {
    display: grid;
    gap: 6px;
    background: #fff;
    border: 1px solid var(--learn-line);
    border-radius: 14px;
    padding: 14px;
}
.school-tile.is-ready { border-color: #7dd3c7; }

.learn-map { display: grid; gap: 8px; }
.learn-map div {
    display: flex;
    gap: 10px;
    align-items: center;
    background: #f8fafc;
    border-radius: 12px;
    padding: 10px 12px;
}
.learn-map span {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--learn-navy);
    color: #fff;
    display: grid;
    place-items: center;
    font-size: 13px;
    font-weight: 700;
}

@media (max-width: 1080px) {
    .learn-main { grid-template-columns: 1fr; }
    .mock-kpis, .mock-grid.is-3 { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 820px) {
    .learn-shell { grid-template-columns: 1fr; }
    .learn-rail {
        position: fixed;
        z-index: 15;
        transform: translateX(-105%);
        transition: transform .2s ease;
        width: min(320px, 88vw);
    }
    .learn-app.is-rail-open .learn-rail { transform: none; }
    .learn-icon-btn { display: inline-grid; place-items: center; }
    .mock-grid.is-2, .mock-grid.is-3, .mock-kpis { grid-template-columns: 1fr; }
    .learn-foot { flex-wrap: wrap; }
    .learn-foot__status { order: 3; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}

/* ---- Steps with screenshots, checks, mistakes, lightbox (tutorial content pass) ---- */
.learn-steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 20px; }
.learn-steps > li { display: grid; gap: 10px; }
.learn-step__text { display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 10px; align-items: start; }
.learn-step__num { width: 28px; height: 28px; border-radius: 50%; background: var(--learn-navy); color: #fff; font-weight: 700; font-size: 14px; display: inline-flex; align-items: center; justify-content: center; margin-top: 1px; }
.learn-step__text p { margin: 0; }
.learn-step__note { color: var(--learn-muted); font-size: 14px; margin-top: 4px !important; }
.learn-figure { margin: 0 0 0 40px; }
.learn-figure__zoom { display: block; width: 100%; padding: 0; border: 1px solid var(--learn-line); border-radius: 12px; background: var(--learn-card); overflow: hidden; cursor: zoom-in; }
.learn-figure__zoom:focus-visible { outline: 3px solid var(--learn-focus); outline-offset: 2px; }
.learn-figure__zoom img { display: block; width: 100%; height: auto; }
.learn-figure figcaption { margin-top: 6px; font-size: 13px; color: var(--learn-muted); }
.learn-teach > .learn-figure { margin-left: 0; margin-bottom: 18px; }
.learn-checks, .learn-mistakes { margin-top: 18px; border: 1px solid var(--learn-line); border-radius: 12px; padding: 12px 14px; }
.learn-checks { background: var(--learn-teal-soft); border-color: #bfe6df; }
.learn-mistakes { background: var(--learn-amber-soft); border-color: #f3d9b1; }
.learn-checks h3, .learn-mistakes h3 { margin: 0 0 8px; font-size: 13px; letter-spacing: .06em; text-transform: uppercase; display: flex; gap: 8px; align-items: center; }
.learn-checks h3 { color: #0b5c52; }
.learn-mistakes h3 { color: #7a3e04; }
.learn-checks ul, .learn-mistakes ul { margin: 0; padding-left: 18px; display: grid; gap: 6px; }
.learn-lightbox { position: fixed; inset: 0; z-index: 60; background: rgba(11, 26, 46, 0.88); display: grid; place-items: center; align-content: center; padding: 24px; }
.learn-lightbox[hidden] { display: none; }
.learn-lightbox img { max-width: min(1400px, 96vw); max-height: 84vh; width: auto; height: auto; border-radius: 10px; background: #fff; box-shadow: 0 30px 80px rgba(0, 0, 0, 0.4); }
.learn-lightbox__caption { color: #dbe6f3; margin: 10px 0 0; font-size: 14px; text-align: center; max-width: 900px; }
.learn-lightbox__close { position: absolute; top: 14px; right: 18px; width: 44px; height: 44px; border-radius: 50%; border: 0; background: rgba(255, 255, 255, 0.14); color: #fff; font-size: 28px; line-height: 1; cursor: pointer; }
.learn-lightbox__close:hover { background: rgba(255, 255, 255, 0.26); }
@media (max-width: 820px) {
    .learn-figure { margin-left: 0; }
    .learn-lightbox { padding: 12px; }
}