:root {
    color-scheme: dark;
    --bg: #0d1220;
    --bg-soft: #151b2d;
    --card: rgba(255,255,255,.08);
    --card-strong: rgba(255,255,255,.12);
    --text: #f7f7fb;
    --muted: #aeb7c8;
    --line: rgba(255,255,255,.14);
    --primary: #7dd3fc;
    --primary-dark: #0ea5e9;
    --ok: #86efac;
    --bad: #fca5a5;
    --close: #fde68a;
    --shadow: 0 24px 80px rgba(0,0,0,.35);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background:
        radial-gradient(circle at top left, rgba(125, 211, 252, .22), transparent 35rem),
        radial-gradient(circle at bottom right, rgba(192, 132, 252, .20), transparent 32rem),
        var(--bg);
    color: var(--text);
}

.app-shell {
    width: min(980px, calc(100% - 32px));
    margin: 0 auto;
    padding: 44px 0 28px;
}

.app-shell.narrow { width: min(1080px, calc(100% - 32px)); }

.hero {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 24px;
    align-items: center;
    margin-bottom: 24px;
}

.hero.compact { grid-template-columns: 1fr auto; }

.eyebrow {
    margin: 0 0 8px;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: .14em;
    font-size: .76rem;
    font-weight: 800;
}

h1, h2 { margin: 0; line-height: 1.1; }
h1 { font-size: clamp(2rem, 5vw, 4rem); max-width: 760px; }
h2 { font-size: clamp(1.35rem, 3vw, 2rem); }

.subtle { color: var(--muted); font-size: 1.05rem; max-width: 620px; }
.small, small { color: var(--muted); }

.card,
.stats-card {
    background: linear-gradient(145deg, var(--card), rgba(255,255,255,.045));
    border: 1px solid var(--line);
    border-radius: 28px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(12px);
}

.card { padding: clamp(20px, 4vw, 36px); }

.stats-card {
    min-width: 170px;
    padding: 18px 20px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.stats-card span, .stats-card small { color: var(--muted); }
.stats-card strong { font-size: 2.4rem; line-height: 1; }

.trainer-card { min-height: 430px; }
.card-topline { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 20px; }
.pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    padding: 7px 11px;
    background: rgba(125, 211, 252, .16);
    color: #d9f3ff;
    border: 1px solid rgba(125, 211, 252, .25);
    font-size: .82rem;
    font-weight: 700;
}
.pill.muted { background: rgba(255,255,255,.08); color: var(--muted); border-color: var(--line); }
.pill.phrase { background: rgba(134, 239, 172, .13); color: #dcfce7; border-color: rgba(134, 239, 172, .24); }

.cz-sentence {
    margin: 24px 0 28px;
    font-size: clamp(1.7rem, 5vw, 3rem);
    font-weight: 800;
    letter-spacing: -.03em;
}

.answer-form,
.admin-form { display: grid; gap: 14px; }
label { color: var(--muted); font-weight: 700; }
textarea, input, select {
    width: 100%;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(255,255,255,.08);
    color: var(--text);
    padding: 15px 16px;
    font: inherit;
    outline: none;
    margin-top: 7px;
}
textarea:focus, input:focus, select:focus {
    border-color: rgba(125, 211, 252, .65);
    box-shadow: 0 0 0 4px rgba(125, 211, 252, .12);
}
textarea { resize: vertical; }

.form-actions { display: flex; gap: 10px; flex-wrap: wrap; }
.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 18px;
    border-radius: 999px;
    border: 0;
    text-decoration: none;
    cursor: pointer;
    font-weight: 850;
    font: inherit;
}
.button.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #05111f;
}
.button.secondary {
    background: rgba(255,255,255,.10);
    color: var(--text);
    border: 1px solid var(--line);
}

.result-card { display: grid; gap: 20px; }
.result-card.ok { border-color: rgba(134, 239, 172, .45); }
.result-card.close { border-color: rgba(253, 230, 138, .45); }
.result-card.bad { border-color: rgba(252, 165, 165, .45); }
.result-head { display: flex; justify-content: space-between; gap: 16px; align-items: flex-start; }
.score-badge {
    white-space: nowrap;
    border-radius: 999px;
    padding: 8px 12px;
    background: rgba(255,255,255,.08);
    color: var(--muted);
    border: 1px solid var(--line);
}
.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}
.compare-grid > div,
.explanation {
    border-radius: 22px;
    background: rgba(255,255,255,.07);
    border: 1px solid var(--line);
    padding: 16px;
}
.compare-grid span { color: var(--muted); font-size: .9rem; }
.compare-grid p { font-size: 1.2rem; font-weight: 750; margin: 8px 0 0; }
.explanation p { color: var(--muted); margin-bottom: 0; }

.error-card { border-color: rgba(252, 165, 165, .5); }
.notice { padding: 12px 14px; border-radius: 16px; background: rgba(255,255,255,.08); }
.ok-text { color: var(--ok); }
.bad-text { color: var(--bad); }

.admin-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 120px;
    gap: 12px;
}
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; border-bottom: 1px solid var(--line); padding: 10px; vertical-align: top; }
th { color: var(--muted); font-size: .9rem; }

.footer {
    display: flex;
    justify-content: center;
    gap: 10px;
    color: var(--muted);
    margin-top: 22px;
}
a { color: var(--primary); }

@media (max-width: 760px) {
    .hero, .hero.compact { grid-template-columns: 1fr; }
    .stats-card { min-width: 0; }
    .compare-grid, .admin-grid { grid-template-columns: 1fr; }
    .app-shell { width: min(100% - 20px, 980px); padding-top: 20px; }
    .card { border-radius: 22px; }
}

/* UI patch: kratší hlavička, klikací nápověda, výběr levelu */
.compact-hero {
    margin-bottom: 18px;
}
.compact-hero h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    max-width: 560px;
}
.compact-hero .subtle {
    margin-top: 10px;
}

.hint-card {
    margin-bottom: 22px;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.055);
    overflow: hidden;
}
.hint-card summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    cursor: pointer;
    padding: 13px 16px;
    color: var(--text);
    font-weight: 800;
    user-select: none;
}
.hint-card summary::-webkit-details-marker { display: none; }
.hint-card summary small {
    color: var(--muted);
    font-weight: 650;
}
.hint-card[open] summary {
    border-bottom: 1px solid var(--line);
}
.hint-content {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 14px 16px 16px;
}

.next-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 12px;
    align-items: end;
}
.inline-level-form {
    min-width: 120px;
}
.level-select {
    display: grid;
    gap: 4px;
    margin: 0;
}
.level-select span {
    color: var(--muted);
    font-size: .82rem;
    font-weight: 800;
}
.level-select select {
    margin: 0;
    height: 46px;
    min-width: 110px;
    padding: 0 14px;
    border-radius: 999px;
}

@media (max-width: 760px) {
    .next-row { grid-template-columns: 1fr; }
    .inline-level-form { min-width: 0; }
}

/* Retry patch: druhý pokus bez prozrazení správné odpovědi */
.retry-card {
    border-color: rgba(253, 230, 138, .45);
}
.retry-notice {
    margin-bottom: 20px;
    padding: 18px;
    border-radius: 22px;
    background: linear-gradient(135deg, rgba(253, 230, 138, .15), rgba(255,255,255,.06));
    border: 1px solid rgba(253, 230, 138, .28);
}
.retry-notice h2 {
    margin-bottom: 8px;
}
.retry-notice p:last-child {
    margin-bottom: 0;
    color: var(--muted);
}
.retry-notice strong {
    color: var(--close);
}

/* Patch: viditelné štítky + schovaná konkrétní nápověda */
.visible-tags {
    margin-bottom: 14px;
}
.visible-tags + .hint-card {
    margin-bottom: 22px;
}

.source-sentence {
    margin: 1rem 0;
    padding: 1rem;
    border: 1px solid var(--line);
    background: rgba(255,255,255,.06);
    border-radius: 1.2rem;
}

.source-sentence span {
    display: block;
    color: var(--muted);
    font-size: .78rem;
    margin-bottom: .35rem;
}

.source-sentence p {
    margin: 0;
    font-size: clamp(1.2rem, 3vw, 1.9rem);
    font-weight: 800;
}