.leaderboard-modal {
    position: fixed;
    inset: 0;
    z-index: 2200;
    background: rgba(0,0,0,0.78);
    backdrop-filter: blur(8px);
    padding: 20px;
}

.leaderboard-modal[hidden] { display: none; }

.leaderboard-modal-content {
    width: min(100%, 680px);
    max-height: min(86dvh, 760px);
    margin: 5vh auto;
    overflow-y: auto;
    background: #ffffff;
    color: #1e1e2f;
    border-radius: 24px;
    padding: 28px;
    position: relative;
    box-shadow: 0 25px 55px rgba(0,0,0,0.38);
}

.leaderboard-heading {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-right: 40px;
}

.leaderboard-heading h2 {
    font-size: 1.8rem;
    line-height: 1.15;
}

.leaderboard-close {
    position: absolute;
    right: 18px;
    top: 14px;
    border: 0;
    background: transparent;
    color: #6b6d7d;
    cursor: pointer;
    font-size: 2rem;
    line-height: 1;
    min-width: 44px;
    min-height: 44px;
}

#leaderboard-refresh {
    min-height: 44px;
    border: 0;
    border-radius: 999px;
    padding: 10px 18px;
    background: linear-gradient(135deg, #ff4757, #ffa502);
    color: white;
    font-weight: 800;
    cursor: pointer;
}

#leaderboard-refresh:disabled {
    opacity: 0.55;
    cursor: not-allowed;
}

.leaderboard-close:focus-visible,
#leaderboard-refresh:focus-visible,
#leaderboard-open:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(255,71,87,0.22);
}

.leaderboard-status {
    margin: 12px 0 18px;
    color: #595b6e;
    line-height: 1.45;
}

.leaderboard-my-rank {
    margin-bottom: 20px;
    padding: 16px;
    border: 1px solid #e5e7ef;
    border-radius: 18px;
    background: #f8f9fc;
}

.leaderboard-my-rank h3 {
    margin-bottom: 10px;
    color: #1e1e2f;
}

.leaderboard-my-card {
    display: grid;
    gap: 10px;
}

.leaderboard-my-card > strong {
    font-size: 1.15rem;
    overflow-wrap: anywhere;
}

.leaderboard-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 10px;
}

.leaderboard-stat-grid span {
    display: grid;
    gap: 2px;
    padding: 10px;
    border-radius: 14px;
    background: white;
}

.leaderboard-stat-grid strong {
    font-size: 1.1rem;
    color: #ff4757;
}

.leaderboard-activity {
    color: #66687a;
    font-size: 0.9rem;
}

.leaderboard-list {
    display: grid;
    gap: 8px;
    list-style: none;
    max-height: 420px;
    overflow-y: auto;
    padding: 0;
}

.leaderboard-row {
    display: grid;
    grid-template-columns: 58px minmax(0, 1fr) 96px 78px;
    gap: 10px;
    align-items: center;
    padding: 12px;
    border: 1px solid #e8e9f2;
    border-radius: 14px;
    background: #ffffff;
}

.leaderboard-row.is-current {
    border-color: #ff4757;
    background: #fff5f5;
}

.leaderboard-rank {
    font-weight: 900;
    color: #ff4757;
}

.leaderboard-player {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 800;
}

.leaderboard-points,
.leaderboard-quizzes {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

.leaderboard-empty {
    padding: 16px;
    border-radius: 14px;
    background: #f8f9fc;
    color: #595b6e;
}

body.light-mode .leaderboard-modal-content {
    background: #ffffff;
    color: #1e1e2f;
}

@media (max-width: 768px) {
    .leaderboard-modal { padding: 12px; }
    .leaderboard-modal-content {
        margin: 3vh auto;
        padding: 22px 16px;
        border-radius: 20px;
    }
    .leaderboard-heading {
        align-items: flex-start;
        flex-direction: column;
        padding-right: 42px;
    }
    .leaderboard-stat-grid {
        grid-template-columns: 1fr;
    }
    .leaderboard-row {
        grid-template-columns: 48px minmax(0, 1fr);
    }
    .leaderboard-points,
    .leaderboard-quizzes {
        text-align: left;
        font-size: 0.92rem;
    }
}

@media (prefers-reduced-motion: reduce) {
    .leaderboard-modal-content,
    #leaderboard-refresh {
        transition: none;
        animation: none;
    }
}