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

body {
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: #e2e8f0;
    min-height: 100vh;
    line-height: 1.6;
}

a { color: #38bdf8; text-decoration: none; }
a:hover { color: #7dd3fc; }

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 20px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    background: rgba(15, 23, 42, 0.9);
    border-bottom: 1px solid #334155;
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: #f8fafc;
}

.navbar .nav-links {
    display: flex;
    gap: 16px;
    align-items: center;
}

.balance-badge {
    background: linear-gradient(135deg, #059669, #10b981);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
}

.card {
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid #334155;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    backdrop-filter: blur(8px);
}

.card h2, .card h3 {
    margin-bottom: 16px;
    color: #f1f5f9;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-primary { background: #2563eb; color: #fff; }
.btn-primary:hover { background: #1d4ed8; }
.btn-success { background: #059669; color: #fff; }
.btn-danger { background: #dc2626; color: #fff; }
.btn-outline {
    background: transparent;
    border: 1px solid #475569;
    color: #e2e8f0;
}
.btn-outline:hover { border-color: #94a3b8; }

.form-group { margin-bottom: 16px; }
.form-group label {
    display: block;
    margin-bottom: 6px;
    color: #94a3b8;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #475569;
    border-radius: 8px;
    background: #0f172a;
    color: #f1f5f9;
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: #38bdf8;
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.alert-success { background: rgba(16, 185, 129, 0.15); border: 1px solid #10b981; color: #6ee7b7; }
.alert-error { background: rgba(239, 68, 68, 0.15); border: 1px solid #ef4444; color: #fca5a5; }
.alert-info { background: rgba(56, 189, 248, 0.15); border: 1px solid #38bdf8; color: #7dd3fc; }

.game-panel {
    border: 1px solid #334155;
    border-radius: 12px;
    padding: 20px;
    background: rgba(15, 23, 42, 0.5);
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.countdown {
    font-size: 1.5rem;
    font-weight: 700;
    color: #fbbf24;
    font-variant-numeric: tabular-nums;
}

.choice-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.choice-btn {
    flex: 1;
    padding: 16px;
    border: 2px solid #475569;
    border-radius: 12px;
    background: transparent;
    color: #e2e8f0;
    font-size: 1.2rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}

.choice-btn:hover { border-color: #38bdf8; }
.choice-btn.selected { border-color: #38bdf8; background: rgba(56, 189, 248, 0.15); }

.choice-btn input { display: none; }

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

th, td {
    padding: 10px 12px;
    text-align: left;
    border-bottom: 1px solid #334155;
}

th { color: #94a3b8; font-weight: 600; }

.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
}

.tag-odd { background: rgba(239, 68, 68, 0.2); color: #fca5a5; }
.tag-even { background: rgba(59, 130, 246, 0.2); color: #93c5fd; }
.tag-won { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }
.tag-lost { background: rgba(100, 116, 139, 0.3); color: #94a3b8; }
.tag-pending { background: rgba(251, 191, 36, 0.2); color: #fcd34d; }

.auth-box {
    max-width: 400px;
    margin: 60px auto;
}

.rule-box {
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 8px;
    padding: 14px;
    font-size: 0.9rem;
    color: #94a3b8;
    margin-bottom: 16px;
}

.rule-box strong { color: #7dd3fc; }

footer {
    text-align: center;
    padding: 24px;
    color: #64748b;
    font-size: 0.85rem;
}

.btn-verify {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    background: rgba(56, 189, 248, 0.15);
    border: 1px solid #38bdf8;
    color: #7dd3fc;
    margin-left: 4px;
}

.btn-verify:hover {
    background: rgba(56, 189, 248, 0.3);
    color: #bae6fd;
}

@media (max-width: 600px) {
    .navbar { flex-direction: column; gap: 12px; }
    .choice-group { flex-direction: column; }
}