:root {
    --bg-primary: #0f0f1a;
    --bg-secondary: #1a1a2e;
    --bg-card: #16213e;
    --bg-card-hover: #1f3460;
    --bg-input: #0f0f1a;
    --text-primary: #eaeaea;
    --text-secondary: #8892b0;
    --text-muted: #5a6380;
    --primary: #ff6b35;
    --primary-glow: rgba(255, 107, 53, 0.3);
    --secondary: #7c3aed;
    --secondary-glow: rgba(124, 58, 237, 0.3);
    --success: #10b981;
    --success-glow: rgba(16, 185, 129, 0.3);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.3);
    --warning: #f59e0b;
    --info: #3b82f6;
    --border: rgba(255,255,255,0.08);
    --border-light: rgba(255,255,255,0.12);
    --shadow: 0 10px 40px rgba(0,0,0,0.4);
    --shadow-lg: 0 25px 60px rgba(0,0,0,0.5);
    --radius: 16px;
    --radius-sm: 10px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
}
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 4px; }
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}
.auth-box {
    background: var(--bg-card);
    padding: 48px;
    border-radius: var(--radius);
    width: 100%;
    max-width: 440px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border);
}
.auth-header { text-align: center; margin-bottom: 36px; }
.auth-header h1 {
    font-size: 32px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--warning));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}
.auth-header p { color: var(--text-secondary); }
.form-group { margin-bottom: 24px; }
.form-group label {
    display: block;
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
}
.form-control {
    width: 100%;
    padding: 16px 20px;
    background: var(--bg-input);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 15px;
    transition: var(--transition);
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
}
.form-control::placeholder { color: var(--text-muted); }
.btn {
    padding: 16px 32px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    text-decoration: none;
}
.btn-primary {
    background: linear-gradient(135deg, var(--primary), #ff8c42);
    color: white;
    box-shadow: 0 4px 20px var(--primary-glow);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px var(--primary-glow); }
.btn-secondary { background: var(--bg-card-hover); color: var(--text-primary); border: 1px solid var(--border-light); }
.btn-success { background: linear-gradient(135deg, var(--success), #34d399); color: white; }
.btn-danger { background: linear-gradient(135deg, var(--danger), #f87171); color: white; }
.btn-purple { background: linear-gradient(135deg, var(--secondary), #a78bfa); color: white; }
.btn-warning { background: linear-gradient(135deg, var(--warning), #fbbf24); color: #000; }
.btn-sm { padding: 10px 20px; font-size: 13px; }
.btn-block { width: 100%; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.alert { padding: 16px 20px; border-radius: var(--radius-sm); margin-bottom: 24px; }
.alert-error { background: rgba(239,68,68,0.15); color: #fca5a5; border: 1px solid rgba(239,68,68,0.3); }
.alert-success { background: rgba(16,185,129,0.15); color: #6ee7b7; border: 1px solid rgba(16,185,129,0.3); }
.auth-link { text-align: center; margin-top: 28px; color: var(--text-secondary); }
.auth-link a { color: var(--primary); text-decoration: none; font-weight: 600; }
.app-layout { display: flex; min-height: 100vh; }
.sidebar {
    width: 280px;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
}
.sidebar-header { padding: 24px; border-bottom: 1px solid var(--border); }
.sidebar-brand {
    font-size: 22px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--warning));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 12px;
}
.sidebar-brand svg { width: 32px; height: 32px; stroke: var(--primary); }
.sidebar-nav { flex: 1; padding: 20px 16px; overflow-y: auto; }
.nav-section { margin-bottom: 24px; }
.nav-section-title { font-size: 11px; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; padding: 0 12px; margin-bottom: 12px; }
.nav-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    font-weight: 500;
    margin-bottom: 4px;
}
.nav-link svg { width: 20px; height: 20px; }
.nav-link:hover { background: var(--bg-card-hover); color: var(--text-primary); }
.nav-link.active { background: linear-gradient(135deg, var(--primary), #ff8c42); color: white; box-shadow: 0 4px 15px var(--primary-glow); }
.sidebar-footer { padding: 20px; border-top: 1px solid var(--border); }
.user-card { display: flex; align-items: center; gap: 12px; padding: 12px; background: var(--bg-input); border-radius: var(--radius-sm); }
.user-avatar { width: 42px; height: 42px; border-radius: 50%; background: linear-gradient(135deg, var(--primary), var(--secondary)); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.user-info { flex: 1; }
.user-info h4 { font-size: 14px; font-weight: 600; }
.user-info p { font-size: 12px; color: var(--text-muted); }
.main-content { flex: 1; margin-left: 280px; padding: 32px; min-height: 100vh; }
.page-header { margin-bottom: 32px; display: flex; justify-content: space-between; align-items: center; }
.page-header h1 { font-size: 28px; font-weight: 800; }
.page-header p { color: var(--text-secondary); margin-top: 6px; }
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 24px; margin-bottom: 32px; }
.stat-card { background: var(--bg-card); padding: 28px; border-radius: var(--radius); border: 1px solid var(--border); transition: var(--transition); position: relative; overflow: hidden; }
.stat-card::before { content: ''; position: absolute; top: 0; left: 0; width: 4px; height: 100%; }
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.stat-card .icon { width: 52px; height: 52px; border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.stat-card .icon svg { width: 26px; height: 26px; }
.stat-card h3 { font-size: 36px; font-weight: 800; margin-bottom: 6px; }
.stat-card p { color: var(--text-secondary); font-size: 14px; }
.stat-card.orange::before { background: var(--primary); }
.stat-card.orange .icon { background: var(--primary-glow); }
.stat-card.orange .icon svg { stroke: var(--primary); }
.stat-card.orange h3 { color: var(--primary); }
.stat-card.green::before { background: var(--success); }
.stat-card.green .icon { background: var(--success-glow); }
.stat-card.green .icon svg { stroke: var(--success); }
.stat-card.green h3 { color: var(--success); }
.stat-card.red::before { background: var(--danger); }
.stat-card.red .icon { background: var(--danger-glow); }
.stat-card.red .icon svg { stroke: var(--danger); }
.stat-card.red h3 { color: var(--danger); }
.stat-card.purple::before { background: var(--secondary); }
.stat-card.purple .icon { background: var(--secondary-glow); }
.stat-card.purple .icon svg { stroke: var(--secondary); }
.stat-card.purple h3 { color: var(--secondary); }
.card { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); overflow: hidden; margin-bottom: 24px; }
.card-header { padding: 24px 28px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; background: rgba(255,255,255,0.02); }
.card-header h2 { font-size: 18px; font-weight: 700; display: flex; align-items: center; gap: 12px; }
.card-header h2 svg { width: 22px; height: 22px; stroke: var(--primary); }
.card-body { padding: 28px; }
.game-modes { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 16px; }
.game-mode { background: var(--bg-input); border: 2px solid var(--border); border-radius: var(--radius-sm); padding: 24px 16px; text-align: center; cursor: pointer; transition: var(--transition); }
.game-mode:hover { border-color: var(--primary); transform: translateY(-4px); }
.game-mode.selected { border-color: var(--primary); background: var(--primary-glow); }
.game-mode h4 { font-size: 20px; font-weight: 800; margin-bottom: 6px; }
.game-mode p { color: var(--text-muted); font-size: 12px; }
.maps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr)); gap: 12px; }
.map-item { background: var(--bg-input); border: 2px solid var(--border); border-radius: var(--radius-sm); padding: 18px 12px; text-align: center; cursor: pointer; transition: var(--transition); font-weight: 600; }
.map-item:hover { border-color: var(--primary); transform: translateY(-2px); }
.map-item.selected { border-color: var(--primary); background: var(--primary-glow); }
.lobbies-grid { display: grid; gap: 16px; }
.lobby-card { background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 24px; display: flex; justify-content: space-between; align-items: center; transition: var(--transition); }
.lobby-card:hover { border-color: var(--primary); transform: translateX(4px); box-shadow: var(--shadow); }
.lobby-info h4 { font-size: 17px; font-weight: 700; margin-bottom: 6px; }
.lobby-info p { color: var(--text-muted); font-size: 13px; }
.lobby-meta { display: flex; gap: 12px; align-items: center; }
.lobby-meta span { background: var(--bg-card); padding: 8px 16px; border-radius: 20px; font-size: 13px; font-weight: 600; }
.lobby-players { color: var(--success) !important; }
.lobby-detail { max-width: 900px; margin: 0 auto; }
.lobby-header-card { background: linear-gradient(135deg, var(--bg-card), var(--bg-card-hover)); border-radius: var(--radius); padding: 48px; text-align: center; border: 1px solid var(--border); margin-bottom: 24px; }
.lobby-code { font-size: 56px; font-weight: 900; letter-spacing: 12px; background: linear-gradient(135deg, var(--primary), var(--warning)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.lobby-mode { color: var(--text-secondary); font-size: 18px; margin-top: 12px; }
.lobby-status { display: inline-flex; align-items: center; gap: 8px; padding: 10px 24px; border-radius: 30px; font-size: 14px; font-weight: 600; margin-top: 20px; }
.lobby-status::before { content: ''; width: 10px; height: 10px; border-radius: 50%; animation: blink 1.5s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }
.lobby-status.waiting { background: var(--primary-glow); color: var(--primary); }
.lobby-status.waiting::before { background: var(--primary); }
.lobby-status.starting { background: rgba(245,158,11,0.2); color: var(--warning); }
.lobby-status.starting::before { background: var(--warning); }
.lobby-status.playing { background: var(--success-glow); color: var(--success); }
.lobby-status.playing::before { background: var(--success); }
.players-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 12px; margin-top: 20px; }
.player-card { background: var(--bg-input); padding: 16px 20px; border-radius: var(--radius-sm); display: flex; align-items: center; gap: 14px; border: 1px solid var(--border); }
.player-card .avatar { width: 44px; height: 44px; border-radius: 50%; background: linear-gradient(135deg, var(--secondary), var(--primary)); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.player-card .name { font-weight: 600; }
.player-card .badge { font-size: 11px; padding: 4px 10px; border-radius: 12px; background: var(--primary-glow); color: var(--primary); margin-left: auto; }
.server-box { background: linear-gradient(135deg, var(--success-glow), rgba(16,185,129,0.05)); border: 1px solid rgba(16,185,129,0.3); border-radius: var(--radius); padding: 32px; text-align: center; margin-top: 24px; }
.server-box h4 { color: var(--success); font-size: 16px; margin-bottom: 16px; display: flex; align-items: center; justify-content: center; gap: 10px; }
.connect-cmd { font-family: monospace; font-size: 18px; background: var(--bg-primary); padding: 20px; border-radius: var(--radius-sm); margin-bottom: 16px; color: var(--success); border: 1px solid var(--border); }
.table-container { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 16px 20px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: var(--bg-input); font-weight: 700; font-size: 12px; color: var(--text-muted); text-transform: uppercase; }
tr { transition: var(--transition); }
tr:hover { background: var(--bg-card-hover); }
.badge { padding: 6px 14px; border-radius: 20px; font-size: 12px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; }
.badge-success { background: var(--success-glow); color: var(--success); }
.badge-success::before { background: var(--success); }
.badge-danger { background: var(--danger-glow); color: var(--danger); }
.badge-danger::before { background: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.2); color: var(--warning); }
.badge-warning::before { background: var(--warning); }
.modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); backdrop-filter: blur(4px); z-index: 1000; align-items: center; justify-content: center; padding: 20px; }
.modal.active { display: flex; }
.modal-content { background: var(--bg-card); border-radius: var(--radius); width: 100%; max-width: 520px; max-height: 90vh; overflow-y: auto; border: 1px solid var(--border); }
.modal-header { padding: 24px 28px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-header h3 { font-size: 20px; font-weight: 700; }
.modal-close { width: 36px; height: 36px; border-radius: 50%; background: var(--bg-input); border: none; color: var(--text-secondary); font-size: 20px; cursor: pointer; display: flex; align-items: center; justify-content: center; }
.modal-close:hover { background: var(--danger); color: white; }
.modal-body { padding: 28px; }
.modal-footer { padding: 20px 28px; border-top: 1px solid var(--border); display: flex; gap: 12px; justify-content: flex-end; }
#toast-container { position: fixed; top: 24px; right: 24px; z-index: 9999; display: flex; flex-direction: column; gap: 12px; }
.toast { background: var(--bg-card); padding: 16px 24px; border-radius: var(--radius-sm); border-left: 4px solid var(--success); box-shadow: var(--shadow); display: flex; align-items: center; gap: 12px; min-width: 300px; animation: slideIn 0.3s ease; }
.toast-error { border-left-color: var(--danger); }
.toast-warning { border-left-color: var(--warning); }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }
.footer { text-align: center; padding: 24px; color: var(--text-muted); font-size: 13px; border-top: 1px solid var(--border); margin-top: 40px; }
.footer strong { color: var(--primary); }
.empty-state { text-align: center; padding: 60px 20px; color: var(--text-muted); }
.empty-state svg { width: 64px; height: 64px; stroke: var(--text-muted); margin-bottom: 20px; }
.empty-state h3 { font-size: 20px; margin-bottom: 8px; color: var(--text-secondary); }
.actions { display: flex; gap: 8px; }
.tabs { display: flex; gap: 4px; background: var(--bg-input); padding: 6px; border-radius: var(--radius-sm); margin-bottom: 24px; }
.tab { flex: 1; padding: 12px 20px; border: none; background: transparent; color: var(--text-secondary); font-weight: 600; cursor: pointer; border-radius: 8px; transition: var(--transition); }
.tab:hover { color: var(--text-primary); }
.tab.active { background: var(--primary); color: white; }
@media (max-width: 1024px) { .sidebar { transform: translateX(-100%); } .sidebar.active { transform: translateX(0); } .main-content { margin-left: 0; } }
@media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } .lobby-card { flex-direction: column; gap: 16px; text-align: center; } .auth-box { padding: 32px 24px; } }