/* Тёмная тема в духе «собеса»: тёплый чёрный фон, мятный акцент, моно-подписи. */
:root {
    --bg: #1a1917;
    --card: #211f1c;
    --card-2: #1d1b19;
    --border: #2e2b27;
    --border-hover: #4a463f;
    --text: #f5f2ec;
    --muted: #8c877e;
    --faint: #5f5b54;
    --accent: #3ef09a;
    --accent-dim: rgba(62, 240, 154, 0.12);
    --accent-ink: #0d1b14;
    --bad: #ff6b6b;
    --bad-dim: rgba(255, 107, 107, 0.1);
    --warn: #f0c24e;
    --mono: ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;
    --sans: "Inter", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { color: inherit; }
code { font-family: var(--mono); font-size: 0.92em; }

/* ---------- шапка ---------- */
.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 24px;
    max-width: 1000px;
    margin: 0 auto;
}
.brand {
    font-family: var(--mono);
    font-size: 0.78rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--muted);
    text-decoration: none;
}
.topbar nav { display: flex; gap: 20px; }
.topbar nav a {
    font-size: 0.9rem;
    color: var(--muted);
    text-decoration: none;
}
.topbar nav a:hover { color: var(--text); }

main { max-width: 1000px; margin: 0 auto; padding: 8px 24px 64px; }

/* ---------- заголовки страниц ---------- */
.eyebrow {
    font-family: var(--mono);
    font-size: 0.74rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--muted);
}
.page-head, .hero { margin: 12px 0 28px; }
.page-head h1, .hero h1 {
    margin: 10px 0 0;
    font-size: clamp(2rem, 5.4vw, 3.3rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.05;
}
.accent { color: var(--accent); }
.hero-sub { margin: 12px 0 0; color: var(--muted); max-width: 640px; }
.back-link { font-size: 0.85rem; color: var(--muted); text-decoration: none; display: inline-block; margin-bottom: 12px; }
.back-link:hover { color: var(--text); }

/* ---------- кнопки ---------- */
.btn {
    display: inline-block;
    padding: 10px 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text);
    font: inherit;
    font-size: 0.9rem;
    text-decoration: none;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}
.btn:hover { border-color: var(--border-hover); background: rgba(255, 255, 255, 0.03); }
.btn-accent { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 700; }
.btn-accent:hover { background: #6bf5b4; border-color: #6bf5b4; }
.btn-good { border-color: rgba(62, 240, 154, 0.5); color: var(--accent); }
.btn-bad { border-color: rgba(255, 107, 107, 0.5); color: var(--bad); }

.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 18px 34px;
    border: 0;
    border-radius: 999px;
    background: var(--accent);
    color: var(--accent-ink);
    font: inherit;
    font-size: 1.05rem;
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s, transform 0.05s;
}
.btn-primary:hover:not(:disabled) { background: #6bf5b4; }
.btn-primary:active:not(:disabled) { transform: translateY(1px); }
.btn-primary:disabled { background: #2b2926; color: var(--muted); cursor: not-allowed; }

/* ---------- карточка ---------- */
.card {
    position: relative;
    padding: 40px 48px 44px;
    border: 1px solid var(--border);
    border-radius: 32px;
    background:
        radial-gradient(700px 320px at 100% 0%, rgba(62, 240, 154, 0.07), transparent 65%),
        var(--card);
}
.card-empty { color: var(--muted); }
.empty-hint { color: var(--muted); font-size: 0.9rem; }

.session-top, .q-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-bottom: 26px;
}
.session-top .timer { color: var(--faint); }
.segments { display: flex; gap: 8px; margin-left: auto; }
.seg { width: 26px; height: 5px; border-radius: 99px; background: #3b3935; }
.seg.is-done, .seg.is-current { background: #3fbf86; }
.seg.is-current:not(.is-done) { box-shadow: 0 0 0 2px rgba(63, 191, 134, 0.25); }

.tag { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; padding: 3px 10px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }
.tag-diff-junior { color: var(--accent); border-color: rgba(62, 240, 154, 0.35); }
.tag-diff-middle { color: var(--warn); border-color: rgba(240, 194, 78, 0.35); }
.tag-diff-senior { color: var(--bad); border-color: rgba(255, 107, 107, 0.35); }

/* ---------- интервьюер ---------- */
.interviewer { margin-bottom: 26px; }
.interviewer .eyebrow { margin-bottom: 10px; }
.bubble {
    display: block;
    max-width: 680px;
    padding: 16px 22px;
    border: 1px solid var(--border);
    border-radius: 22px 22px 22px 6px;
    background: #26231f;
    font-size: 1.12rem;
    font-weight: 500;
    line-height: 1.5;
}

.q-title {
    margin: 0 0 24px;
    font-size: clamp(1.45rem, 3.4vw, 2.1rem);
    font-weight: 900;
    letter-spacing: -0.03em;
    line-height: 1.2;
}

/* чипы с кодом */
.chip {
    padding: 2px 8px;
    border-radius: 8px;
    background: rgba(62, 240, 154, 0.1);
    color: var(--accent);
    white-space: nowrap;
}
.bubble .chip { background: #34312b; color: var(--text); }

/* ---------- варианты ответа ---------- */
.options { display: flex; flex-direction: column; gap: 14px; width: 100%; }
.opt {
    position: relative;
    display: flex;
    width: 100%;
    align-items: center;
    gap: 18px;
    padding: 16px 22px;
    border: 1px solid var(--border);
    border-radius: 20px;
    background: var(--card-2);
    font-size: 1.06rem;
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s, opacity 0.15s;
}
.mcq-form .opt:hover { border-color: var(--border-hover); }
.opt input[type="radio"] { position: absolute; opacity: 0; pointer-events: none; }
.opt-key {
    flex: 0 0 44px;
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border: 1px solid #3a3731;
    border-radius: 14px;
    font-family: var(--mono);
    font-size: 0.9rem;
    color: var(--muted);
    transition: all 0.15s;
}
.opt-text { flex: 1; }
.opt.is-selected { border-color: var(--accent); background: var(--accent-dim); }
.opt.is-selected .opt-key { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 800; }

.options.is-answered .opt { cursor: default; }
.opt.is-correct { border-color: var(--accent); background: var(--accent-dim); }
.opt.is-correct .opt-key { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); font-weight: 800; }
.opt.is-wrong { border-color: var(--bad); background: var(--bad-dim); }
.opt.is-wrong .opt-key { background: var(--bad); border-color: var(--bad); color: #2a0d0d; font-weight: 800; }
.opt.is-dim { opacity: 0.5; }
.opt-mark { font-weight: 800; }
.opt.is-correct .opt-mark { color: var(--accent); }
.opt.is-wrong .opt-mark { color: var(--bad); }

.verdict { margin: 24px 0 0; padding: 20px 24px; border-radius: 20px; border: 1px solid var(--border); background: var(--card-2); }
.verdict p { margin: 8px 0 0; color: #d8d4cc; }
.verdict.is-ok { border-color: rgba(62, 240, 154, 0.35); }
.verdict.is-ok .eyebrow { color: var(--accent); }
.verdict.is-bad { border-color: rgba(255, 107, 107, 0.35); }
.verdict.is-bad .eyebrow { color: var(--bad); }

.actions { display: flex; align-items: center; flex-wrap: wrap; gap: 16px 22px; margin-top: 28px; }
.hint { color: var(--muted); font-size: 0.88rem; }

/* карточки «знал / не знал» (вопросы без вариантов) */
.card-answer { margin: 8px 0 24px; padding: 14px 20px; border: 1px solid var(--border); border-radius: 18px; background: var(--card-2); }
.card-answer summary { cursor: pointer; color: var(--accent); font-weight: 600; }
.card-answer p { margin: 12px 0 0; color: #d8d4cc; }
.card-actions { display: flex; gap: 12px; justify-content: flex-end; }

/* ---------- итог ---------- */
.result { padding: 8px 0 0; }
.result-score { margin: 14px 0 6px; font-weight: 900; letter-spacing: -0.05em; }
.result-score .big { font-size: clamp(4rem, 12vw, 6.5rem); color: var(--accent); line-height: 1; }
.result-score .of { font-size: clamp(1.4rem, 4vw, 2rem); color: var(--muted); font-weight: 700; letter-spacing: -0.02em; }
.result-text { font-size: 1.15rem; max-width: 560px; }
.result-time { color: var(--muted); }

/* ---------- темы ---------- */
.topic-list { display: grid; gap: 12px; }
.topic-row {
    display: grid;
    grid-template-columns: minmax(180px, 1.2fr) minmax(120px, 1fr) auto;
    align-items: center;
    gap: 22px;
    padding: 18px 24px;
    border: 1px solid var(--border);
    border-radius: 22px;
    background: var(--card);
}
.topic-info { display: flex; flex-direction: column; gap: 2px; }
.topic-name { font-weight: 800; font-size: 1.1rem; letter-spacing: -0.02em; }
.topic-meta { color: var(--muted); font-size: 0.85rem; }
.topic-bar { height: 6px; border-radius: 99px; background: #34312b; overflow: hidden; }
.topic-bar-fill { height: 100%; background: #3fbf86; border-radius: 99px; }
.topic-actions { display: flex; gap: 10px; }
.all-topics { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.empty { color: var(--muted); }

/* ---------- статистика ---------- */
.stats-table { width: 100%; border-collapse: collapse; border: 1px solid var(--border); border-radius: 22px; overflow: hidden; background: var(--card); }
.stats-table th, .stats-table td { padding: 14px 20px; text-align: left; border-bottom: 1px solid var(--border); }
.stats-table th { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); font-weight: 500; }
.stats-table tr:last-child td { border-bottom: 0; }

/* ---------- настройка mock ---------- */
.mock-form { display: grid; gap: 24px; max-width: 640px; padding: 32px; border: 1px solid var(--border); border-radius: 28px; background: var(--card); }
.mock-field { display: grid; gap: 10px; }
.mock-label { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); }
.mock-topics { display: flex; flex-wrap: wrap; gap: 10px; }
.mock-check { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px; cursor: pointer; font-size: 0.92rem; }
.mock-check:has(input:checked) { border-color: var(--accent); background: var(--accent-dim); }
.mock-check input { accent-color: var(--accent); }
.mock-form select { padding: 10px 14px; border-radius: 14px; border: 1px solid var(--border); background: var(--card-2); color: var(--text); font: inherit; max-width: 160px; }

/* ---------- мобильные ---------- */
@media (max-width: 720px) {
    .card { padding: 26px 20px 30px; border-radius: 26px; }
    .segments { margin-left: 0; width: 100%; }
    .seg { flex: 1; width: auto; }
    .opt { padding: 14px 16px; gap: 14px; font-size: 1rem; }
    .opt-key { flex-basis: 38px; width: 38px; height: 38px; }
    .topic-row { grid-template-columns: 1fr; gap: 12px; }
    .topbar { padding: 14px 16px; }
    main { padding: 4px 16px 48px; }
    .btn-primary { width: 100%; justify-content: center; }
}

/* Entry point to the independent learning programme. */
.course-entry { display:flex; align-items:center; justify-content:space-between; gap:24px; padding:24px; margin:0 0 30px; border:1px solid #2b7852; border-radius:20px; background:var(--accent-dim); }
.course-entry h2 { margin:6px 0; font-size:1.3rem; }
.course-entry p { margin:0; color:#b5b0a7; font-size:.9rem; }
.course-entry .btn { flex-shrink:0; }
@media(max-width:720px) { .topbar { flex-wrap:wrap; } .topbar nav { flex-wrap:wrap; gap:16px; } .course-entry { align-items:start; flex-direction:column; } }