body {
    background-color: #0f172a; /* Darker background for neon effects */
    color: #f8fafc;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

.navbar {
    background-color: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #1e293b !important;
}

.navbar-brand, .nav-link, .text-muted {
    color: #94a3b8 !important;
}

.navbar-brand {
    color: #f8fafc !important;
}

.game-container {
    display: inline-block;
    border-radius: 8px;
    background: #000;
    border: 2px solid #1e293b !important;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5), 0 0 10px rgba(59, 130, 246, 0.2);
    overflow: hidden;
}

#tetris, #opponent-tetris {
    display: block;
    background-color: #000;
}

.card {
    background-color: #1e293b;
    border: 1px solid #334155;
    border-radius: 8px;
    color: #f8fafc;
}

.card-title {
    color: #f8fafc;
}

.btn {
    border-radius: 6px;
    transition: all 0.2s ease-in-out;
}

.btn-primary {
    background-color: #3b82f6;
    border-color: #3b82f6;
}

.btn-primary:hover {
    background-color: #2563eb;
    border-color: #2563eb;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.5);
}

.btn-dark {
    background-color: #0f172a;
    border-color: #334155;
}

.btn-outline-dark {
    color: #94a3b8;
    border-color: #334155;
}

.btn-outline-dark:hover {
    background-color: #334155;
    color: #f8fafc;
}

.btn-outline-info {
    color: #3b82f6;
    border-color: #3b82f6;
}

.btn-outline-info:hover {
    background-color: #3b82f6;
    color: #f8fafc;
}

.next-piece-container {
    background-color: #0f172a !important;
    border: 1px solid #334155 !important;
    border-radius: 6px;
}

#next-piece {
    background-color: transparent !important;
}

.list-group-item {
    background-color: transparent;
    border-color: #334155;
    color: #94a3b8;
}

.form-control {
    background-color: #0f172a;
    border: 1px solid #334155;
    color: #f8fafc;
}

.form-control:focus {
    background-color: #0f172a;
    border-color: #3b82f6;
    color: #f8fafc;
    box-shadow: 0 0 0 0.25rem rgba(59, 130, 246, 0.25);
}

.form-control::placeholder {
    color: #64748b;
}

/* Multiplayer specific */
#multiplayer-status-bar {
    border-radius: 8px;
    font-weight: 600;
    background-color: #1e293b;
    border: 1px solid #3b82f6;
    color: #3b82f6;
}

#opponent-column {
    transition: opacity 0.5s ease;
}

#player-label, #opponent-label {
    letter-spacing: 0.15em;
    font-size: 0.7rem;
    color: #64748b;
}

#score-val, #level-val, #opponent-score-val {
    color: #3b82f6;
    font-weight: 700;
}

.badge.bg-dark {
    background-color: #0f172a !important;
    border: 1px solid #334155;
}

hr {
    border-color: #334155;
    opacity: 0.5;
}