.rules {
    position: relative;
    z-index: 1;
    max-width: 880px;
    margin: 0 auto;
    padding: 120px 22px 40px;
}

.rules-hero {
    text-align: center;
    margin-bottom: 48px;
}

.rules-hero h1 {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(2.6rem, 8vw, 4.4rem);
    line-height: 1;
    margin: 0 0 16px;
    letter-spacing: -1px;
    background: linear-gradient(180deg, #fff 0%, #c9b8ff 60%, var(--brand) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.rules-hero p {
    color: var(--muted);
    font-size: 1.1rem;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.rule-group {
    background: rgba(15, 10, 25, 0.5);
    border: 1px solid var(--glass-brd);
    border-radius: var(--radius);
    margin-bottom: 18px;
    overflow: hidden;
}

.rule-group > summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 22px 26px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.45rem;
    transition: background 0.2s ease;
}

.rule-group > summary::-webkit-details-marker {
    display: none;
}

.rule-group > summary:hover {
    background: rgba(255, 255, 255, 0.03);
}

.rule-group > summary .sum-icon {
    font-size: 1.5rem;
}

.rule-group > summary .chevron {
    margin-left: auto;
    width: 22px;
    height: 22px;
    color: var(--muted);
    transition: transform 0.3s ease;
}

.rule-group[open] > summary .chevron {
    transform: rotate(180deg);
}

.rule-group-body {
    padding: 4px 22px 22px;
}

.group-date {
    text-align: right;
    color: var(--muted);
    font-size: 0.85rem;
    margin: 6px 4px 0;
}

.rule-card {
    display: flex;
    gap: 20px;
    background: rgba(20, 14, 30, 0.62);
    backdrop-filter: blur(12px);
    border: 1px solid var(--glass-brd);
    border-radius: var(--radius);
    padding: 26px 28px;
    margin-bottom: 18px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.rule-card:hover {
    border-color: rgba(255, 255, 255, 0.22);
}

.rule-num {
    flex: 0 0 auto;
    width: 46px;
    height: 46px;
    display: grid;
    place-items: center;
    border-radius: 13px;
    background: rgba(139, 92, 246, 0.16);
    border: 1px solid rgba(139, 92, 246, 0.4);
    color: var(--brand);
    font-family: var(--font-display);
    font-weight: 800;
    font-size: 1.2rem;
}

.rule-body {
    flex: 1;
    min-width: 0;
}

.rule-body h2 {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
    margin: 4px 0 12px;
}

.rule-body ul {
    margin: 0;
    padding-left: 1.1em;
}

.rule-body li {
    color: var(--muted);
    line-height: 1.65;
    margin-bottom: 8px;
}

.rule-body li b {
    color: var(--ink);
    font-weight: 600;
}

.rules-note {
    text-align: center;
    color: var(--muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-top: 34px;
    padding: 22px;
    border: 1px solid var(--glass-brd);
    border-radius: 16px;
    background: var(--glass);
}

.rules-note a {
    color: var(--brand-2);
}

@media (max-width: 560px) {
    .rule-card { flex-direction: column; gap: 14px; padding: 22px; }
}