/* Trang chủ – hero, section, danh sách đề thi */

.hero {
    text-align: center;
    padding: 48px 24px;
    background: var(--primary-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    margin-bottom: 32px;
}

.hero h1 {
    font-size: 24px;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--text);
    letter-spacing: -0.02em;
}

.hero p {
    color: var(--text-secondary);
    margin: 0 0 24px;
    font-size: 15px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.hero .btn-lg {
    margin-top: 0;
}

.section h2 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.quiz-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 20px;
}

.quiz-card {
    transition: box-shadow 0.2s ease, border-color 0.2s ease;
}

.quiz-card:hover {
    box-shadow: var(--shadow);
    border-color: var(--border-strong);
}

.quiz-card .quiz-meta {
    font-size: 13px;
    color: var(--text-tertiary);
    margin-bottom: 16px;
}

.quiz-card .quiz-meta span {
    margin-right: 16px;
}