.page {
    max-width: 1180px;
}

.card {
    margin-top: 16px;
    padding: 22px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: var(--panel);
    box-shadow: var(--shadow);
}

.card h2 {
    margin: 0 0 10px;
    color: var(--accent);
    font-size: 20px;
}

.card h3 {
    margin: 18px 0 8px;
    color: var(--accent-2);
    font-size: 16px;
    font-weight: 700;
}

.card p, .card li {
    color: var(--muted);
    line-height: 1.7;
    font-size: 14px;
}

.card ul {
    margin: 10px 0 0;
    padding-left: 22px;
}

.card a {
    color: var(--accent);
    font-weight: 600;
}

.card.note {
    border-left: 4px solid #f59e0b;
}

.rule-list {
    display: grid;
    gap: 8px;
    margin-top: 12px;
}

.rule-item {
    padding: 10px 12px;
    border: 1px solid var(--line);
    border-radius: 10px;
    background: #fff;
}

.rule-item strong {
    color: var(--accent);
}

.rule-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
    background: #fff;
    font-size: 13px;
}

.rule-table th, .rule-table td {
    padding: 9px 10px;
    border: 1px solid var(--line);
    text-align: left;
    vertical-align: top;
}

.rule-table th {
    color: var(--accent);
    background: #f9fafb;
}

.rule-table td {
    color: var(--muted);
}

.table-wrap {
    overflow-x: auto;
}

.dina-year-groups {
    display: grid;
    gap: 18px;
    margin-top: 14px;
}

.dina-year-group {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: #fff;
}

.dina-year-group summary {
    padding: 11px 14px;
    color: var(--text);
    background: #f9fafb;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    letter-spacing: 0.03em;
    list-style: none;
}

.dina-year-group summary::-webkit-details-marker {
    display: none;
}

.dina-year-group summary::after {
    content: '+';
    float: right;
    color: var(--accent);
    font-size: 18px;
    line-height: 1;
}

.dina-year-group[open] summary::after {
    content: '−';
}

.dina-year-group summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: -2px;
}

.dina-year-group .rule-table {
    margin-top: 0;
}

.dina-year-group .rule-table th {
    position: sticky;
    top: 0;
}

.dina-year-group .rule-table th:first-child {
    width: 28%;
}

.dina-year-group .rule-table th:nth-child(2) {
    width: 15%;
}

.dina-year-group .rule-table td:nth-child(2) {
    text-align: center;
    font-weight: 700;
    color: var(--text);
}