/* ============================================
   RESET & BASE
============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0a0e17;
    color: #e4e8ef;
    min-height: 100vh;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================
   HEADER
============================================ */
header {
    background: linear-gradient(135deg, #0f1a2e, #1a2a4a);
    padding: 30px 0;
    border-bottom: 2px solid #2a4a7a;
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(90deg, #f7971e, #ffd200);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: #8aa4c8;
    font-size: 1.1rem;
    margin-top: 5px;
}

header .badge {
    display: inline-block;
    background: #00c853;
    color: #fff;
    font-size: 0.75rem;
    padding: 4px 12px;
    border-radius: 20px;
    margin-top: 10px;
    font-weight: 600;
    letter-spacing: 0.5px;
}

/* ============================================
   STATS BAR
============================================ */
.stats-bar {
    background: #111e30;
    padding: 20px 0;
    border-bottom: 1px solid #1a3050;
}

.stats-bar .container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    text-align: center;
}

.stat-item {
    background: #0a1628;
    padding: 15px;
    border-radius: 12px;
    border: 1px solid #1a3050;
}

.stat-label {
    display: block;
    font-size: 0.85rem;
    color: #8aa4c8;
    margin-bottom: 4px;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    color: #fff;
}

/* ============================================
   TABS
============================================ */
.tabs-section {
    background: #0f1a2e;
    padding: 15px 0;
    border-bottom: 1px solid #1a3050;
}

.tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

.tab-btn {
    background: transparent;
    color: #8aa4c8;
    border: 2px solid #1a3050;
    padding: 10px 25px;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.tab-btn:hover {
    background: #1a3050;
    color: #fff;
}

.tab-btn.active {
    background: #f7971e;
    color: #0a0e17;
    border-color: #f7971e;
}

/* ============================================
   LEADERBOARD
============================================ */
.leaderboard-section {
    padding: 40px 0;
}

#leaderboard {
    background: #111e30;
    border-radius: 16px;
    padding: 20px;
    border: 1px solid #1a3050;
    min-height: 300px;
}

/* ============================================
   LEADERBOARD ITEMS
============================================ */
.leaderboard-item {
    display: flex;
    align-items: center;
    padding: 14px 16px;
    border-bottom: 1px solid #1a2a4a;
    transition: background 0.2s;
}

.leaderboard-item:last-child {
    border-bottom: none;
}

.leaderboard-item:hover {
    background: #162a44;
}

.rank {
    font-size: 1.2rem;
    font-weight: 700;
    width: 50px;
    color: #8aa4c8;
}

.rank.gold { color: #ffd700; }
.rank.silver { color: #c0c0c0; }
.rank.bronze { color: #cd7f32; }

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: #2a4a7a;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    color: #fff;
    margin-right: 15px;
    flex-shrink: 0;
}

.info {
    flex: 1;
}

.info .name {
    font-weight: 600;
    font-size: 1.05rem;
}

.info .sub {
    font-size: 0.85rem;
    color: #8aa4c8;
}

.score {
    font-weight: 700;
    font-size: 1.1rem;
    color: #f7971e;
}

.badges {
    display: flex;
    gap: 6px;
    margin-left: 15px;
}

.badge-icon {
    font-size: 1.2rem;
}

.loading {
    text-align: center;
    padding: 60px 0;
    color: #8aa4c8;
    font-size: 1.1rem;
}

.empty {
    text-align: center;
    padding: 60px 0;
    color: #8aa4c8;
}

/* ============================================
   FOOTER
============================================ */
footer {
    background: #0a0e17;
    padding: 25px 0;
    text-align: center;
    border-top: 1px solid #1a3050;
    color: #5a7a9a;
    font-size: 0.9rem;
}

footer .small {
    font-size: 0.75rem;
    margin-top: 4px;
    color: #3a5a7a;
}

/* ============================================
   RESPONSIVE
============================================ */
@media (max-width: 768px) {
    header h1 {
        font-size: 1.8rem;
    }

    .stats-bar .container {
        grid-template-columns: repeat(2, 1fr);
    }

    .stat-value {
        font-size: 1.4rem;
    }

    .tabs {
        gap: 6px;
    }

    .tab-btn {
        padding: 6px 14px;
        font-size: 0.85rem;
    }

    .leaderboard-item {
        flex-wrap: wrap;
        gap: 8px;
    }

    .rank {
        width: 35px;
        font-size: 1rem;
    }

    .badges {
        margin-left: 0;
        width: 100%;
        padding-left: 50px;
    }
}