:root {
    --bg-1: #070b16;
    --bg-2: #101a31;
    --accent: #56f0d0;
    --accent-2: #f7a64a;
    --glass: rgba(255, 255, 255, 0.08);
    --text: #f6f9ff;
    --muted: #b6c4de;
    --danger: #ff6f8e;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
    --radius: 20px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    font-family: "Space Grotesk", "Segoe UI", sans-serif;
    background: radial-gradient(circle at 12% 12%, #25447a 0%, transparent 35%),
                radial-gradient(circle at 88% 5%, #5f2e67 0%, transparent 28%),
                linear-gradient(130deg, var(--bg-1), var(--bg-2));
}

.shell {
    width: min(1100px, 92vw);
    margin: 36px auto;
}

.hero-card,
.result-card,
.question-card,
.test-header {
    background: var(--glass);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-card,
.result-card {
    padding: 34px;
}

.eyebrow {
    text-transform: uppercase;
    letter-spacing: 0.18em;
    font-size: 0.74rem;
    color: var(--accent);
    margin: 0 0 8px;
}

h1 {
    margin: 0 0 12px;
    font-size: clamp(1.7rem, 3vw, 2.7rem);
}

.subtitle {
    color: var(--muted);
    max-width: 800px;
}

.name-form {
    margin-top: 26px;
    display: grid;
    gap: 18px;
}

label {
    font-weight: 600;
}

input[type="text"] {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 14px 16px;
    background: rgba(0, 0, 0, 0.25);
    color: var(--text);
    font-size: 1rem;
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.level-option {
    position: relative;
    display: block;
    cursor: pointer;
}

.level-option input {
    position: absolute;
    opacity: 0;
}

.level-option span {
    display: grid;
    gap: 5px;
    padding: 16px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.02);
    transition: transform .2s ease, border-color .2s ease;
}

.level-option:hover span {
    transform: translateY(-3px);
}

.level-option input:checked + span {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(86, 240, 208, 0.25);
}

.level-option small,
.level-option em {
    color: var(--muted);
    font-style: normal;
    font-size: .9rem;
}

.primary-btn,
.ghost-btn {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    border: 0;
    border-radius: 12px;
    padding: 12px 18px;
    font-weight: 700;
    text-decoration: none;
    cursor: pointer;
}

.primary-btn {
    color: #052222;
    background: linear-gradient(130deg, var(--accent), #9afde8);
}

.ghost-btn {
    color: var(--text);
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: transparent;
}

.test-shell {
    display: grid;
    gap: 18px;
}

.test-header {
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.timer {
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-2);
}

.question-list {
    display: grid;
    gap: 14px;
}

.question-card {
    padding: 20px;
}

.question-top {
    display: grid;
    gap: 8px;
}

.pill {
    width: fit-content;
    border-radius: 999px;
    padding: 6px 10px;
    font-size: .78rem;
    color: #0d2320;
    background: linear-gradient(120deg, #84f3de, #ffc078);
    font-weight: 700;
}

.question-card h2 {
    margin: 0;
    font-size: 1.1rem;
}

.option-grid {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
}

.option-item {
    display: block;
    cursor: pointer;
}

.option-item input {
    position: absolute;
    opacity: 0;
}

.option-item span {
    display: block;
    padding: 12px 12px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.14);
    transition: border-color .18s ease;
}

.option-item input:checked + span {
    border-color: var(--accent-2);
}

.submit-btn {
    margin-top: 6px;
}

.result-card .score-block {
    margin: 16px 0 24px;
}

.result-counters {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 18px;
}

.counter {
    border-radius: 12px;
    padding: 14px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: rgba(255, 255, 255, 0.04);
}

.counter h2 {
    margin: 0 0 6px;
    font-size: 1rem;
}

.counter p {
    margin: 0;
    font-size: 1.4rem;
    font-weight: 800;
}

.counter.ok {
    border-color: rgba(86, 240, 208, 0.3);
}

.counter.bad {
    border-color: rgba(255, 111, 142, 0.45);
}

.score-block span {
    display: block;
    font-size: 3rem;
    font-weight: 800;
}

.score-block small {
    color: var(--muted);
}

.timeout-note {
    margin: 0 0 18px;
    color: var(--danger);
    font-weight: 600;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 12px;
    margin-bottom: 22px;
}

.category-grid article {
    padding: 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.category-grid h2 {
    margin: 0 0 6px;
    font-size: 1rem;
}

.category-grid p {
    margin: 0;
    color: var(--muted);
}

.actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.answer-review {
    margin: 0 0 22px;
    display: grid;
    gap: 10px;
}

.answer-review > h2 {
    margin: 0 0 4px;
}

.answer-review-item {
    padding: 14px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
}

.answer-review-item.correct {
    border-color: rgba(86, 240, 208, 0.35);
}

.answer-review-item.incorrect {
    border-color: rgba(255, 111, 142, 0.45);
}

.answer-review-item p {
    margin: 6px 0 0;
}

.answer-review-title {
    margin-top: 0;
    font-weight: 700;
}

.answer-review-meta {
    color: var(--muted);
    font-size: .92rem;
}

@media (max-width: 940px) {
    .level-grid,
    .category-grid,
    .option-grid {
        grid-template-columns: 1fr;
    }

    .test-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
}