:root {
    --disco-color-1: #ff00ff;
    --disco-color-2: #00ffff;
    --disco-color-3: #ffff00;
    --disco-color-4: #ff0000;
}

body {
    background-color: #000;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.disco-lights::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, 
        rgba(255, 0, 255, 0.2),
        rgba(0, 255, 255, 0.2),
        rgba(255, 255, 0, 0.2));
    animation: disco-bg 8s infinite;
    z-index: -1;
}

@keyframes disco-bg {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.container {
    max-width: 800px;
}

.disco-text {
    color: white;
    font-weight: 700;
    text-shadow: 2px 2px 4px var(--disco-color-1),
                 -2px -2px 4px var(--disco-color-2);
    animation: disco-text 1s infinite;
}

@keyframes disco-text {
    0% { text-shadow: 2px 2px 4px var(--disco-color-1), -2px -2px 4px var(--disco-color-2); }
    33% { text-shadow: 2px 2px 4px var(--disco-color-2), -2px -2px 4px var(--disco-color-3); }
    66% { text-shadow: 2px 2px 4px var(--disco-color-3), -2px -2px 4px var(--disco-color-4); }
    100% { text-shadow: 2px 2px 4px var(--disco-color-1), -2px -2px 4px var(--disco-color-2); }
}

.disco-card {
    border-radius: 15px;
    border: 2px solid var(--disco-color-1);
    background-color: rgba(0, 0, 0, 0.8);
    box-shadow: 0 0 15px var(--disco-color-1);
    animation: disco-border 4s infinite;
}

@keyframes disco-border {
    0% { border-color: var(--disco-color-1); box-shadow: 0 0 15px var(--disco-color-1); }
    33% { border-color: var(--disco-color-2); box-shadow: 0 0 15px var(--disco-color-2); }
    66% { border-color: var(--disco-color-3); box-shadow: 0 0 15px var(--disco-color-3); }
    100% { border-color: var(--disco-color-1); box-shadow: 0 0 15px var(--disco-color-1); }
}

.disco-input {
    background-color: rgba(255, 255, 255, 0.9);
    border: none;
    color: #000;
}

.disco-btn {
    background: linear-gradient(45deg, var(--disco-color-1), var(--disco-color-2));
    border: none;
    animation: disco-btn 2s infinite;
}

@keyframes disco-btn {
    0% { background: linear-gradient(45deg, var(--disco-color-1), var(--disco-color-2)); }
    50% { background: linear-gradient(45deg, var(--disco-color-3), var(--disco-color-4)); }
    100% { background: linear-gradient(45deg, var(--disco-color-1), var(--disco-color-2)); }
}

.list-group-item {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.2);
    margin-bottom: 8px;
    border-radius: 8px !important;
    transition: all 0.3s ease;
}

.list-group-item:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: scale(1.02);
}

.list-group-item.completed .item-name {
    text-decoration: line-through;
    color: rgba(255, 255, 255, 0.5);
}

.disco-spinner {
    color: var(--disco-color-1) !important;
    animation: disco-spin 1s linear infinite;
}

.disco-spin {
    animation: disco-spin 2s linear infinite;
}

@keyframes disco-spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.alert {
    background-color: rgba(0, 0, 0, 0.8);
    border: 1px solid var(--disco-color-1);
    color: white;
}

.btn-sm {
    background: transparent;
    border: 1px solid var(--disco-color-1);
    color: white;
    transition: all 0.3s ease;
}

.btn-sm:hover {
    background: var(--disco-color-1);
    transform: scale(1.1);
}

@media (max-width: 576px) {
    .container {
        padding: 0 15px;
    }
    
    h1 {
        font-size: 1.8rem;
    }
}