*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: system-ui, sans-serif;
    background: #f4f4f0;
    color: #222;
    line-height: 1.6;
}

/* ── Header ─────────────────────────────────────────────── */
header {
    background: #2c5f2e;
    color: #fff;
    padding: 2rem 1.5rem 1.5rem;
    text-align: center;
}

header h1 {
    font-size: 2.2rem;
    letter-spacing: 0.02em;
}

header p {
    margin-top: 0.4rem;
    opacity: 0.85;
}

/* ── Main ────────────────────────────────────────────────── */
main {
    max-width: 720px;
    margin: 2rem auto;
    padding: 0 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* ── Info box ────────────────────────────────────────────── */
.info-box {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.info-box h2 {
    font-size: 1.3rem;
    color: #2c5f2e;
    margin-bottom: 0.75rem;
}

.info-box h3 {
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #2c5f2e;
    margin: 1rem 0 0.35rem;
}

.info-box p {
    color: #444;
}

.info-box ul {
    padding-left: 1.4rem;
    color: #444;
}

.info-box li {
    margin-bottom: 0.25rem;
}

.info-box a {
    color: #2c5f2e;
    font-weight: 600;
}

.info-box a:hover {
    opacity: 0.8;
}

/* ── Game card ───────────────────────────────────────────── */
.game-card {
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.game-card__header {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 1rem;
}

.game-card__header:hover {
    background: #f0f7f0;
}

.game-card__title {
    font-size: 1.15rem;
    font-weight: 700;
    flex: 1;
}

.game-card__meta {
    font-size: 0.85rem;
    color: #666;
}

.game-card__toggle {
    font-size: 0.85rem;
    color: #888;
    transition: transform 0.2s;
    flex-shrink: 0;
}

.game-card__header[aria-expanded="true"] .game-card__toggle {
    transform: rotate(180deg);
}

.game-card__body {
    padding: 0 1.25rem 1.25rem;
    border-top: 1px solid #eee;
}

.game-card__body h3 {
    margin: 1rem 0 0.35rem;
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: #2c5f2e;
}

.game-card__body ul,
.game-card__body ol {
    padding-left: 1.4rem;
}

.game-card__body li {
    margin-bottom: 0.25rem;
}

.game-card__summary {
    margin-top: 0.75rem;
    color: #444;
    font-style: italic;
}

.game-card__tip {
    margin-top: 1rem;
    background: #f0f7f0;
    border-left: 4px solid #2c5f2e;
    padding: 0.6rem 0.9rem;
    border-radius: 0 4px 4px 0;
    font-size: 0.9rem;
}