:root {
    --lt-ink: #171923;
    --lt-paper: #fbfbfd;
    --lt-white: #fff;
    --lt-muted: #666a79;
    --lt-line: #e5e4ec;
    --lt-violet: #554cf2;
    --lt-violet-dark: #3f37d4;
    --lt-lilac: #efeeff;
    --lt-green: #147b61;
}

* { box-sizing: border-box; }
html { background: var(--lt-ink); scroll-behavior: smooth; }
body.learning-page {
    margin: 0;
    color: var(--lt-ink);
    background: var(--lt-paper);
    font: 16px/1.62 Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    -webkit-font-smoothing: antialiased;
}
.learning-page a { color: var(--lt-violet); }
.lt-wrap { width: min(1160px, calc(100% - 40px)); margin: 0 auto; }
.lt-header {
    position: sticky;
    top: 0;
    z-index: 40;
    color: var(--lt-ink);
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid var(--lt-line);
    box-shadow: 0 4px 20px rgba(16,24,40,.035);
    backdrop-filter: blur(18px);
}
.lt-header .lt-wrap { display: flex; align-items: center; justify-content: space-between; min-height: 70px; }
.lt-brand img { display: block; width: 155px; height: 40px; object-fit: contain; }
.lt-nav { display: flex; gap: 6px; align-items: center; }
.lt-nav a {
    padding: 9px 12px;
    border-radius: 999px;
    color: #475467;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
}
.lt-nav a:hover { color: #111827; background: #f2f4f7; }
.lt-nav a[aria-current="page"] { color: #4d49e5; background: #ecebff; }
.lt-mast { color: #fff; background: #15151f; }
.lt-mast__inner { display: grid; grid-template-columns: 1.02fr .98fr; min-height: 480px; }
.lt-mast__copy { display: flex; flex-direction: column; justify-content: center; padding: 70px 64px 64px 0; }
.lt-mast__media { position: relative; min-height: 420px; margin: 0; overflow: hidden; }
.lt-mast__media::after { position: absolute; inset: 0; content: ""; box-shadow: inset 70px 0 80px #15151f; pointer-events: none; }
.lt-mast__media img { width: 100%; height: 100%; object-fit: cover; filter: saturate(.82) contrast(1.04); }
.lt-kicker { display: block; margin-bottom: 12px; color: #6f67ff; font-size: 12px; font-weight: 850; letter-spacing: .15em; text-transform: uppercase; }
.lt-mast h1 { max-width: 720px; margin: 0 0 22px; font-size: clamp(44px, 5.4vw, 76px); line-height: .99; letter-spacing: -.055em; }
.lt-mast p { max-width: 680px; margin: 0 0 14px; color: #cac9d5; font-size: 18px; }
.lt-byline { color: #9f9eae !important; font-size: 13px !important; }
.lt-byline a { color: #fff; }
.lt-main { padding: 70px 0 96px; }
.lt-lede { max-width: 840px; margin: 0 0 48px; color: #3e414c; font-size: 19px; }
.lt-main h2 { margin: 72px 0 16px; font-size: clamp(31px, 3.8vw, 49px); line-height: 1.07; letter-spacing: -.045em; }
.lt-main h3 { margin: 0 0 10px; font-size: 21px; line-height: 1.2; }
.lt-main p { color: #454854; }
.speaking-priority {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 30px;
    align-items: center;
    margin: 0 0 56px;
    padding: 30px;
    color: #fff;
    background: var(--lt-ink);
    border-radius: 26px;
}
.speaking-priority h2 { margin: 0 0 8px; color: #fff; font-size: 28px; }
.speaking-priority p { max-width: 720px; margin: 0; color: #c7c8d1; }
.lt-button {
    display: inline-flex;
    min-height: 46px;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border: 0;
    border-radius: 999px;
    color: #fff !important;
    background: var(--lt-violet);
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
}
.lt-button:hover { background: var(--lt-violet-dark); }
.lt-button--quiet { color: var(--lt-ink) !important; background: var(--lt-white); border: 1px solid var(--lt-line); }
.score-layout { display: grid; grid-template-columns: minmax(0, .92fr) minmax(360px, 1.08fr); gap: 28px; align-items: start; }
.score-panel, .target-panel, .resource-viewer, .source-card {
    padding: 30px;
    border: 1px solid var(--lt-line);
    border-radius: 26px;
    background: var(--lt-white);
    box-shadow: 0 22px 60px rgba(28,25,62,.08);
}
.score-panel h2, .target-panel h2, .resource-viewer h2 { margin: 0 0 10px; font-size: 31px; }
.score-inputs { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; margin: 24px 0; }
.score-inputs label, .target-controls label { color: var(--lt-muted); font-size: 13px; font-weight: 800; }
.score-inputs select, .target-controls select {
    display: block;
    width: 100%;
    min-height: 50px;
    margin-top: 7px;
    padding: 9px 14px;
    border: 1px solid var(--lt-line);
    border-radius: 13px;
    color: var(--lt-ink);
    background: var(--lt-paper);
    font: inherit;
    font-size: 17px;
    font-weight: 750;
}
.overall-result { display: flex; align-items: flex-end; gap: 16px; margin: 28px 0; padding-top: 24px; border-top: 1px solid var(--lt-line); }
.overall-result strong { font-size: 88px; line-height: .8; letter-spacing: -.07em; }
.overall-result span { color: var(--lt-muted); font-weight: 750; }
.raw-average { margin: 0; color: var(--lt-muted) !important; font-size: 13px; }
.score-bars { display: grid; gap: 15px; padding: 30px; color: #fff; background: var(--lt-ink); border-radius: 26px; }
.score-bar__label { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; font-weight: 750; }
.score-bar__track { height: 10px; overflow: hidden; border-radius: 999px; background: rgba(255,255,255,.11); }
.score-bar__fill { width: 0; height: 100%; border-radius: inherit; background: #746dff; transition: width 360ms cubic-bezier(.2,.8,.2,1); }
.score-impact { margin: 6px 0 0 !important; color: #c7c8d1 !important; font-size: 14px; }
.target-panel { margin-top: 28px; }
.target-controls { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 22px 0; }
.target-output { padding: 20px; border-left: 4px solid var(--lt-violet); background: var(--lt-lilac); }
.target-output strong { color: var(--lt-violet-dark); }
.rule-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin: 34px 0; overflow: hidden; border: 1px solid var(--lt-line); border-radius: 20px; background: var(--lt-line); }
.rule-strip div { padding: 22px; background: #fff; }
.rule-strip strong, .rule-strip span { display: block; }
.rule-strip strong { margin-bottom: 7px; font-size: 20px; }
.rule-strip span { color: var(--lt-muted); font-size: 13px; }
.official-note { margin: 38px 0; padding: 20px 22px; border-left: 4px solid var(--lt-violet); background: #f4f3f9; }
.official-note p { margin: 0; font-size: 14px; }
.resource-jump { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; margin: 32px 0 64px; }
.resource-jump a { min-height: 150px; padding: 24px; border: 1px solid var(--lt-line); border-radius: 22px; color: var(--lt-ink); background: #fff; text-decoration: none; }
.resource-jump a:hover { border-color: var(--lt-violet); transform: translateY(-2px); }
.resource-jump strong, .resource-jump span { display: block; }
.resource-jump strong { margin-bottom: 10px; font-size: 20px; }
.resource-jump span { color: var(--lt-muted); font-size: 14px; }
.resource-browser { display: grid; grid-template-columns: 300px minmax(0,1fr); gap: 22px; align-items: start; }
.resource-list { display: grid; gap: 9px; }
.resource-select {
    width: 100%;
    padding: 16px;
    border: 1px solid var(--lt-line);
    border-radius: 16px;
    color: var(--lt-ink);
    background: #fff;
    text-align: left;
    cursor: pointer;
}
.resource-select[aria-pressed="true"] { color: #fff; border-color: var(--lt-violet); background: var(--lt-violet); }
.resource-select strong, .resource-select span { display: block; }
.resource-select span { margin-top: 4px; font-size: 12px; opacity: .74; }
.resource-viewer { padding: 18px; }
.resource-viewer__head { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 8px 8px 18px; }
.resource-viewer__head h2 { margin: 0; font-size: 23px; }
.resource-frame { display: block; width: 100%; height: 680px; border: 1px solid var(--lt-line); border-radius: 16px; background: #f2f2f7; }
.source-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 18px; }
.source-card { box-shadow: none; }
.source-card__meta { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 18px; }
.source-badge { padding: 5px 9px; border-radius: 999px; color: var(--lt-muted); background: #f0eff5; font-size: 11px; font-weight: 850; letter-spacing: .05em; text-transform: uppercase; }
.source-badge--official { color: #0f6c54; background: #e5f6f0; }
.source-card .lt-button { margin-top: 12px; }
.format-story { margin: 34px 0 44px; padding: 34px; border-radius: 26px; color: #fff; background: #171923; }
.format-story h2 { margin: 0 0 8px !important; color: #fff !important; font-size: 32px !important; }
.format-story > p { margin: 0 0 24px; color: #c7c8d1; }
.format-story__stage { display: grid; grid-template-columns: 260px minmax(0,1fr); overflow: hidden; border: 1px solid rgba(255,255,255,.12); border-radius: 20px; }
.format-story__steps { display: flex; flex-direction: column; border-right: 1px solid rgba(255,255,255,.12); }
.format-story__step { min-height: 66px; padding: 14px 18px; border: 0; border-bottom: 1px solid rgba(255,255,255,.08); color: #c8cad4; background: transparent; text-align: left; cursor: pointer; }
.format-story__step[aria-selected="true"] { color: #fff; background: #30313b; }
.format-story__panel { min-height: 270px; padding: 38px; background: #242052; }
.format-story__panel[hidden] { display: none; }
.format-story__panel strong { color: #847eff; font-size: 12px; letter-spacing: .13em; text-transform: uppercase; }
.format-story__panel h3 { margin: 12px 0 !important; color: #fff !important; font-size: 36px !important; }
.format-story__panel p { max-width: 630px; color: #d4d3df; }
.lt-footer { padding: 36px 0; color: #a9abb6; background: #17181d; }
.lt-footer .lt-wrap { display: flex; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.lt-footer a { color: #d2d3da; }

@media (max-width: 860px) {
    .lt-mast__inner, .score-layout, .resource-browser { grid-template-columns: 1fr; }
    .lt-mast__copy { order: 2; padding: 34px 0 48px; }
    .lt-mast__media { min-height: 310px; }
    .lt-mast__media::after { box-shadow: inset 0 -90px 80px #15151f; }
    .speaking-priority { grid-template-columns: 1fr; }
    .resource-jump { grid-template-columns: 1fr; }
    .resource-frame { height: 560px; }
}

@media (max-width: 620px) {
    .lt-wrap { width: min(100% - 30px, 1160px); }
    .lt-header .lt-wrap { min-height: 68px; }
    .lt-nav a { display: none; }
    .lt-nav a:first-child, .lt-nav a:nth-child(2) { display: inline-flex; padding: 8px 9px; font-size: 12px; }
    .lt-mast h1 { font-size: 45px; }
    .lt-mast__media { min-height: 260px; }
    .lt-main { padding-top: 48px; }
    .score-inputs, .target-controls, .source-grid, .rule-strip { grid-template-columns: 1fr; }
    .overall-result strong { font-size: 72px; }
    .score-panel, .target-panel, .source-card { padding: 22px; }
    .resource-frame { height: 480px; }
    .format-story { padding: 24px 0; border-radius: 20px; }
    .format-story > h2, .format-story > p { margin-left: 20px !important; margin-right: 20px !important; }
    .format-story__stage { grid-template-columns: 1fr; border-right: 0; border-left: 0; border-radius: 0; }
    .format-story__steps { overflow-x: auto; flex-direction: row; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
    .format-story__step { min-width: 145px; }
    .format-story__panel { padding: 30px 22px; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}