:root {
    --ink: #1c2430;
    --muted: #5c6b7a;
    --paper: #f6f1e7;
    --card: #fffdf8;
    --line: #e4d8c4;
    --accent: #e36a2e;
    --accent-ink: #fff7f2;
    --ok: #1f7a4d;
    --bad: #a33b32;
    --shadow: 0 18px 40px rgba(40, 28, 12, 0.08);
    font-family: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    color: var(--ink);
    background:
        radial-gradient(900px 400px at 10% -10%, #ffe7c7, transparent 60%),
        radial-gradient(700px 380px at 110% 0%, #f7d7c4, transparent 55%),
        var(--paper);
    min-height: 100vh;
}
a { color: inherit; }
button, input, select { font: inherit; }

.top {
    display: flex;
    align-items: center;
    gap: 24px;
    padding: 18px 28px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; text-decoration: none; letter-spacing: -0.03em; }
.brand img { height: 38px; width: auto; display: block; }
.login-mark { height: 84px; width: auto; display: block; margin-bottom: 12px; }
.dash { display: grid; grid-template-columns: minmax(260px, 400px) 1fr; gap: 22px; align-items: start; }
.summit { position: relative; border-radius: 28px; overflow: hidden; box-shadow: var(--shadow); }
.summit-art { width: 100%; height: auto; display: block; }
.climber { position: absolute; margin: 0; transform: translate(-50%, -100%); }
.climber img { width: 100%; height: auto; display: block; filter: drop-shadow(0 14px 10px rgba(28, 36, 48, 0.35)); }
.climber figcaption {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translate(-50%, -120%);
    white-space: nowrap;
    background: rgba(255, 253, 248, 0.94);
    border-radius: 999px;
    padding: 4px 8px;
    font-family: ui-sans-serif, system-ui, sans-serif;
    font-size: 12px;
}
.climber.is-you figcaption { background: var(--ink); color: #fff; }
.dash-side .subject, .dash-side article { margin-top: 16px; }
.top nav { display: flex; gap: 16px; }
.top nav a { text-decoration: none; color: var(--muted); }
.who { margin-left: auto; display: flex; gap: 14px; align-items: center; }
.who a { color: var(--muted); }
.grade {
    font-family: ui-sans-serif, system-ui, sans-serif;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.score-rule { margin: -4px 0 16px; color: var(--muted); font-family: ui-sans-serif, system-ui, sans-serif; }
.catalog { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 16px; }
.subject, .catalog article { padding: 22px 24px; }
.lesson-card {
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    text-decoration: none;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    padding: 16px 18px;
}
.lesson-card span { display: grid; }
.lesson-card em { font-style: normal; color: var(--muted); }
.lesson-card:hover { background: #fff6ea; }
select.is-right, input.is-right, label.is-right { box-shadow: 0 0 0 2px var(--ok); background: #e7f6ee; }
select.is-wrong, input.is-wrong, label.is-wrong { box-shadow: 0 0 0 2px var(--bad); background: #fde8e4; }
.chip {
    font-family: ui-sans-serif, system-ui, sans-serif;
    font-size: 13px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 6px 10px;
}
.timer { font-variant-numeric: tabular-nums; }

main { width: min(920px, calc(100% - 32px)); margin: 10px auto 64px; }
.kicker { letter-spacing: 0.12em; text-transform: uppercase; font-size: 12px; color: var(--accent); margin: 0 0 8px; font-family: ui-sans-serif, system-ui, sans-serif; }
h1 { font-size: clamp(36px, 6vw, 58px); line-height: 0.95; margin: 0 0 12px; letter-spacing: -0.03em; }
h2, h3 { margin: 0 0 8px; }
.lead, .prompt { font-size: 20px; line-height: 1.45; }
.muted { color: var(--muted); }

.login {
    min-height: 100vh;
    display: grid;
    grid-template-columns: minmax(280px, 1.1fr) minmax(320px, 460px);
    align-items: center;
    gap: 48px;
    padding: 48px 8vw;
}
.login-hero h1 { font-size: clamp(64px, 8vw, 108px); }
.login-card, article, .theory, .task, .stats, .rating-list, .task-list {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: 28px;
    box-shadow: var(--shadow);
}
.login-card { width: min(460px, 100%); padding: 36px; }
form { display: grid; gap: 14px; }
label { display: grid; gap: 6px; font-family: ui-sans-serif, system-ui, sans-serif; font-size: 14px; }
input {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 14px;
    padding: 12px 14px;
    font-size: 18px;
}
button, .button, a.ghost, button.ghost {
    border: 0;
    background: var(--accent);
    color: var(--accent-ink);
    border-radius: 999px;
    padding: 12px 18px;
    text-decoration: none;
    cursor: pointer;
    font-family: ui-sans-serif, system-ui, sans-serif;
}
.ghost, a.ghost, button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.alert { background: #fde8e4; color: var(--bad); padding: 10px 12px; border-radius: 12px; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px; padding: 8px; margin: 18px 0; }
.stats div { padding: 16px; }
.stats strong { display: block; font-size: 34px; }
.stats span { color: var(--muted); font-family: ui-sans-serif, system-ui, sans-serif; }
.pair { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 16px; margin-top: 18px; }
.pair article, .theory { padding: 22px 24px; }
.theory p, .pair li { line-height: 1.5; }
.section-title { margin: 28px 8px 10px; }
.task-list, .rating-list { list-style: none; margin: 0; padding: 8px; }
.task-list a, .rating-list a {
    display: flex; gap: 14px; align-items: center; text-decoration: none;
    padding: 12px 14px; border-radius: 18px;
}
.task-list a:hover, .rating-list a:hover { background: #fff6ea; }
.task-list .num { width: 36px; height: 36px; border-radius: 12px; display: grid; place-items: center; background: #fff1e4; }
.task-list em, .badge { font-style: normal; color: var(--muted); font-family: ui-sans-serif, system-ui, sans-serif; font-size: 13px; }
.task-list a span:nth-child(2) { display: grid; }
.badge { margin-left: auto; }
.badge.ok { color: var(--ok); }
.badge.try { color: var(--accent); }
.rating-list a { justify-content: space-between; }

.task { padding: 28px; }
.hud { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.blank-line { margin: 16px 0; font-size: 20px; line-height: 1.75; }
.blank-line .gap { white-space: nowrap; }
.blank-line select { display: inline-block; width: auto; margin: 0 0.15em; vertical-align: middle; }
.blank-line .tail { margin-left: 0.1em; }
select {
    border: 1px solid var(--line);
    background: #fff;
    border-radius: 14px;
    padding: 10px 12px;
    font-size: 18px;
}
.blank-line select, .compare-row select { min-width: 11rem; }
.fields { display: grid; gap: 12px; }
.choices { display: grid; gap: 8px; }
.choices label { display: flex; gap: 10px; align-items: center; background: #fff; border: 1px solid var(--line); border-radius: 14px; padding: 10px 12px; }
blockquote { margin: 0 0 16px; padding: 16px 18px; background: #fff8ee; border-radius: 18px; }
.set-rows { display: grid; gap: 8px; margin-bottom: 10px; }
.compare-row { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; margin: 8px 0; font-size: 22px; }
.compare-row span:last-child { text-align: right; }
.signs button { margin: 0 4px; min-width: 44px; }
.signs button.on { background: var(--ink); color: white; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 18px; }
.actions .next { margin-left: auto; background: var(--ink); color: #fff; }
#result { margin-top: 16px; padding: 16px 18px; border-radius: 18px; }
#result p { margin: 0; }
#result.ok { background: #e7f6ee; color: var(--ok); }
#result.bad { background: #fde8e4; color: var(--bad); }
#result.pending { background: #fff6ea; color: var(--ink); }
#result .next-go { display: inline-block; margin-top: 12px; background: var(--ink); color: #fff; }
.done-note { color: var(--ok); }
.theme-danya { --accent: #2f6f9f; --accent-ink: #f3f9fd; }

@media (max-width: 720px) {
    .pair, .stats, .login, .catalog, .dash { grid-template-columns: 1fr; }
    .login { padding: 28px 18px; gap: 12px; }
    .login-hero h1 { font-size: 64px; }
    .top { flex-wrap: wrap; }
    .compare-row { font-size: 18px; }
    .actions .next { margin-left: 0; }
}