:root {
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-color: #333;
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --trade-border: #ff8c00;
    --trade-bg: #fff4e6;
    --rarity-common: #bdc3c7;
    --rarity-rare: #3498db;
    --rarity-epic: #9b59b6;
    --rarity-legendary: #f1c40f;
    --transition-speed: 0.3s;
}

body.dark-mode {
    --bg-color: #1a1a1a;
    --card-bg: #2d2d2d;
    --text-color: #f0f2f5;
    --primary-color: #375a7f;
    --trade-bg: #3d2b1f;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color var(--transition-speed), color var(--transition-speed);
    padding-bottom: 50px;
}

header {
    background: linear-gradient(135deg, var(--primary-color), #6610f2);
    color: white;
    padding: 2rem 1rem;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Controls & Filters */
.controls {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    margin-top: -2rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    position: sticky;
    top: 10px;
    z-index: 100;
}

.search-box {
    flex: 1;
    min-width: 250px;
}

input, select, button {
    padding: 0.6rem 1rem;
    border-radius: 6px;
    border: 1px solid #ddd;
    font-size: 1rem;
    background: var(--card-bg);
    color: var(--text-color);
}

button {
    cursor: pointer;
    transition: transform 0.1s, opacity 0.2s;
    border: none;
    background: var(--primary-color);
    color: white;
    font-weight: 600;
}

button:active {
    transform: scale(0.95);
}

button.secondary {
    background: var(--secondary-color);
}

/* Stats & Progress */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.stat-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.progress-bar-container {
    height: 12px;
    background: #eee;
    border-radius: 6px;
    margin: 10px 0;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--success-color);
    width: 0%;
    transition: width 0.5s ease-out;
}

/* Grid */
.collection-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.1);
    transition: transform 0.2s, border 0.3s;
    position: relative;
    border: 2px solid transparent;
    display: flex;
    flex-direction: column;
}

.card.not-owned {
    opacity: 0.7;
    filter: grayscale(0.5);
}

.card.is-trade {
    border-color: var(--trade-border);
    background-color: var(--trade-bg);
}

.card-img {
    width: 100%;
    height: 180px;
    background: #eee;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: #999;
}

.card-info {
    padding: 1rem;
    flex-grow: 1;
}

.card-name {
    font-weight: bold;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.badge-series { background: #333; color: white; }
.badge-rarity { color: white; }
.badge-trade { background: var(--trade-border); color: white; }

/* Quantity Controls */
.quantity-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0,0,0,0.05);
    padding: 0.8rem;
    border-top: 1px solid rgba(0,0,0,0.1);
}

.qty-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.qty-val {
    font-weight: bold;
    font-size: 1.2rem;
}

/* Trade List Section */
#trade-list-section {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--trade-bg);
    border-radius: 15px;
    border: 2px dashed var(--trade-border);
}

/* Toasts */
#toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 1000;
}

.toast {
    background: #333;
    color: white;
    padding: 1rem 1.5rem;
    border-radius: 8px;
    margin-top: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

.modal {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
    text-align: center;
}

.actions {
    margin-top: 1rem;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--secondary-color);
}

.mobile-only {
    display: none;
}

@media (max-width: 600px) {
    .mobile-only {
        display: block;
    }

    .collection-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }

    .card-img {
        height: 120px;
    }

    .card-name {
        font-size: 0.9rem;
    }

    .badge {
        padding: 0.1rem 0.3rem;
        font-size: 0.65rem;
    }

    .controls {
        flex-direction: column;
        padding: 1rem;
    }

    /* Hide all filters except search and toggle buttons by default */
    .controls > select, 
    .controls > #toggleTheme {
        display: none;
    }

    .controls.expanded > select,
    .controls.expanded > #toggleTheme {
        display: block;
    }

    .search-box {
        min-width: 100%;
    }
    
    #toggleFilters {
        width: 100%;
        margin-top: 10px;
    }
}

/* List View Styles */
.collection-grid.list-view {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.list-view .card {
    flex-direction: row;
    align-items: center;
    padding: 0.5rem 1rem;
    height: auto;
}

.list-view .card-img {
    display: none;
}

.list-view .card-info {
    padding: 0;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    flex-grow: 1;
}

.list-view .card-info .badge-series {
    margin-bottom: 0;
}

.list-view .card-info .badge-rarity,
.list-view .card-info .badge-trade,
.list-view .card-info div[style*="secondary-color"],
.list-view .card-info span[style*="secondary-color"] {
    display: none;
}

.list-view .card-name {
    margin-bottom: 0;
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.list-view .quantity-controls {
    background: transparent;
    border: none;
    padding: 0;
}

.list-view .qty-btn {
    width: 30px;
    height: 30px;
    font-size: 1rem;
}

.list-view .qty-val {
    width: 30px;
    text-align: center;
}