:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(148, 163, 184, 0.1);
    --accent: #3b82f6;
    --accent-glow: #60a5fa;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --gold: #fbbf24;
    --success: #10b981;
    --danger: #ef4444;
}

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

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at 50% 0%, #1e293b 0%, #0f172a 100%);
    color: var(--text-main);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 40px;
    padding-top: 20px;
}

h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3rem;
    color: var(--accent-glow);
    text-shadow: 0 0 20px rgba(59, 130, 246, 0.5);
    margin-bottom: 10px;
    letter-spacing: 2px;
}

header p {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* Controls */
.controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

input {
    padding: 12px 20px;
    border-radius: 50px;
    border: 1px solid var(--card-border);
    background: var(--card-bg);
    color: white;
    width: 300px;
    font-size: 1rem;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.3);
}

button {
    padding: 12px 25px;
    border: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--accent), #2563eb);
    color: white;
    cursor: pointer;
    font-weight: bold;
    font-size: 1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(59, 130, 246, 0.3);
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

/* Tabs */
.tabs {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 10px 20px;
    border-radius: 12px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.3s ease;
    font-weight: 500;
}

.tab-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-glow);
    border-color: var(--accent);
}

.tab-btn.active {
    background: var(--accent);
    color: white;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
    border-color: var(--accent);
}

/* Leaderboard Cards */
.leaderboard-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.player-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    overflow: hidden;
}

.player-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--accent);
    opacity: 0.5;
}

.player-card:nth-child(1)::before { background: var(--gold); opacity: 1; }
.player-card:nth-child(2)::before { background: #c0c0c0; opacity: 1; } /* Silver */
.player-card:nth-child(3)::before { background: #cd7f32; opacity: 1; } /* Bronze */

.player-card:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.3);
    border-color: rgba(148, 163, 184, 0.3);
}

.player-info {
    display: flex;
    align-items: center;
    gap: 20px;
}

.rank {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--text-muted);
    width: 40px;
    text-align: center;
}

.rank.top-3 {
    color: var(--gold);
    text-shadow: 0 0 10px rgba(251, 191, 36, 0.5);
}

.username {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-main);
}

.stats {
    text-align: right;
}

.elo {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-glow);
    margin-bottom: 4px;
}

.rank-badge {
    font-size: 0.9rem;
    color: var(--text-muted);
    background: rgba(255,255,255,0.05);
    padding: 4px 10px;
    border-radius: 20px;
    display: inline-block;
}

/* Search Results Table */
.search-results {
    margin-top: 40px;
    background: var(--card-bg);
    padding: 25px;
    border-radius: 16px;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.search-results h2 {
    margin-bottom: 20px;
    color: var(--accent-glow);
    font-family: 'Orbitron', sans-serif;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--card-border);
}

th {
    color: var(--accent-glow);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

tr:last-child td {
    border-bottom: none;
}

tr:hover td {
    background: rgba(255,255,255,0.02);
}

.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-muted);
    font-style: italic;
}

/* Responsive */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    .player-card { flex-direction: column; text-align: center; gap: 15px; }
    .player-info { flex-direction: column; }
    .stats { text-align: center; }
    input { width: 100%; }
}