* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    -webkit-tap-highlight-color: transparent;
}

:root {
    --bg-a: #042f2e;
    --bg-b: #0f172a;
    --card: rgba(255, 255, 255, 0.92);
    --soft: rgba(255, 255, 255, 0.16);
    --text: #0f172a;
    --muted: #64748b;
    --primary: #0f766e;
    --primary-2: #14b8a6;
    --warn: #f59e0b;
    --danger: #e11d48;
    --ok: #16a34a;
    --line: rgba(15, 23, 42, 0.12);
    --shadow: 0 28px 90px rgba(2, 6, 23, 0.38);
}

html,
body {
    width: 100%;
    min-height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
    background:
        radial-gradient(circle at 16% 12%, rgba(20, 184, 166, 0.38), transparent 28%),
        radial-gradient(circle at 86% 18%, rgba(56, 189, 248, 0.24), transparent 32%),
        linear-gradient(135deg, var(--bg-a), var(--bg-b));
    color: #fff;
    user-select: none;
    touch-action: manipulation;
}

button {
    border: 0;
    font: inherit;
    cursor: pointer;
}

#app {
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: clamp(14px, 3vw, 28px);
}

.screen {
    display: none;
    width: min(100%, 760px);
}

.screen.active {
    display: block;
}

.card,
.panel {
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 32px;
    background: var(--card);
    color: var(--text);
    box-shadow: var(--shadow);
    backdrop-filter: blur(20px);
}

.hero,
.result-card {
    padding: clamp(24px, 5vw, 44px);
    text-align: center;
}

.eyebrow {
    color: var(--primary);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.16em;
    text-transform: uppercase;
}

h1 {
    margin-top: 10px;
    font-size: clamp(36px, 8vw, 66px);
    line-height: 1;
    letter-spacing: -0.06em;
}

h2 {
    font-size: clamp(22px, 5vw, 34px);
    letter-spacing: -0.04em;
}

.lead {
    max-width: 600px;
    margin: 16px auto 0;
    color: #475569;
    line-height: 1.75;
}

.notice {
    margin: 22px auto 0;
    max-width: 620px;
    display: grid;
    gap: 8px;
    padding: 16px;
    border: 1px solid #fed7aa;
    border-radius: 20px;
    background: #fff7ed;
    color: #9a3412;
    text-align: left;
    line-height: 1.65;
}

.rules,
.summary-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 24px 0;
}

.rules article,
.summary-grid article {
    padding: 16px 12px;
    border: 1px solid var(--line);
    border-radius: 20px;
    background: #f8fafc;
}

.rules b,
.summary-grid b {
    display: block;
    color: var(--primary);
    font-size: 24px;
}

.rules span,
.summary-grid span {
    display: block;
    margin-top: 6px;
    color: var(--muted);
    font-size: 13px;
    line-height: 1.45;
}

.btn {
    min-height: 52px;
    border-radius: 18px;
    padding: 0 26px;
    font-weight: 900;
    color: #fff;
    transition: transform 0.16s ease, filter 0.16s ease;
}

.btn:active {
    transform: scale(0.96);
}

.btn.primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    box-shadow: 0 16px 34px rgba(15, 118, 110, 0.28);
}

.btn.ghost {
    width: 100%;
    margin-top: 12px;
    color: #334155;
    background: #e2e8f0;
}

.panel {
    padding: clamp(14px, 3vw, 24px);
}

.hud {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
}

.hud div {
    padding: 12px;
    border-radius: 18px;
    background: #f1f5f9;
    text-align: center;
}

.hud b {
    display: block;
    color: var(--primary);
    font-size: 20px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hud span {
    color: var(--muted);
    font-size: 12px;
}

.bar {
    height: 10px;
    margin: 14px 0 18px;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}

#barFill {
    width: 0%;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), #38bdf8);
    transition: width 0.25s ease;
}

.question {
    text-align: center;
}

#hintText {
    margin-top: 6px;
    color: var(--muted);
}

#plate {
    display: block;
    width: min(100%, 520px);
    aspect-ratio: 1;
    margin: 18px auto;
    border-radius: 999px;
    background: #f8fafc;
    box-shadow: inset 0 0 0 1px var(--line), 0 20px 46px rgba(15, 23, 42, 0.14);
}

.options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
}

.option {
    min-height: 54px;
    border-radius: 18px;
    background: #f8fafc;
    color: var(--text);
    border: 1px solid #cbd5e1;
    font-weight: 900;
}

.option.correct {
    color: #fff;
    background: var(--ok);
    border-color: var(--ok);
}

.option.wrong {
    color: #fff;
    background: var(--danger);
    border-color: var(--danger);
}

.axis-report {
    display: grid;
    gap: 12px;
    margin: 18px 0;
    text-align: left;
}

.axis-row {
    display: grid;
    grid-template-columns: 110px 1fr 92px;
    gap: 12px;
    align-items: center;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: #fff;
}

.axis-row strong {
    color: #0f172a;
}

.axis-bar {
    height: 12px;
    overflow: hidden;
    border-radius: 999px;
    background: #e2e8f0;
}

.axis-fill {
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, var(--primary), var(--ok));
}

.axis-score {
    color: var(--primary);
    font-weight: 950;
    text-align: right;
}

.deep-btn {
    grid-column: 1 / -1;
    min-height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-2));
    color: #fff;
    font-weight: 900;
}

.recommendation {
    padding: 16px;
    border-radius: 20px;
    background: #eef2ff;
    color: #334155;
    line-height: 1.75;
    text-align: left;
}

@media (max-width: 560px) {
    .rules,
    .summary-grid,
    .hud,
    .options {
        grid-template-columns: 1fr;
    }

    .axis-row {
        grid-template-columns: 1fr;
    }

    .axis-score {
        text-align: left;
    }
}