:root {
    --primary-color: #6366f1;
    --secondary-color: #a855f7;
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --card-bg: #1e293b;
    --border-color: #334155;
    --nav-height: 70px;
    /* Semantic colors for theming */
    --muted-text-color: #94a3b8;
    --input-bg: #0f172a;
    --success-color: #34d399;
    --info-color: #60a5fa;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
}

[data-theme="light"] {
    --primary-color: #4f46e5;
    --secondary-color: #9333ea;
    --bg-color: #f8fafc;
    --text-color: #0f172a;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --muted-text-color: #64748b;
    --input-bg: #ffffff;
    --success-color: #059669;
    --info-color: #2563eb;
    --danger-color: #dc2626;
    --warning-color: #d97706;
}

[data-theme="compact"] {
    --primary-color: #2563eb;
    --secondary-color: #475569;
    --bg-color: #f1f5f9;
    --text-color: #1e293b;
    --card-bg: #ffffff;
    --border-color: #cbd5e1;
    --gap-size: 0.5rem;
    --muted-text-color: #64748b;
    --input-bg: #ffffff;
    --success-color: #059669;
    --info-color: #2563eb;
    --danger-color: #dc2626;
    --warning-color: #d97706;
}

[data-theme="expressive"] {
    --primary-color: #ec4899;
    --secondary-color: #f59e0b;
    --bg-color: #2a0a2e;
    /* Dark purple */
    --text-color: #fdf2f8;
    --card-bg: #4a1d4b;
    --border-color: #831843;
    --muted-text-color: #f9a8d4;
    --input-bg: #3b0d40;
    --success-color: #34d399;
    --info-color: #a78bfa;
    --danger-color: #fb7185;
    --warning-color: #fbbf24;
    font-family: 'Outfit', sans-serif;
}

[data-theme="technical"] {
    --primary-color: #10b981;
    /* Green */
    --secondary-color: #0ea5e9;
    /* Blue */
    --bg-color: #000000;
    --text-color: #d1d5db;
    --card-bg: #111827;
    --border-color: #374151;
    --muted-text-color: #9ca3af;
    --input-bg: #0a0a0a;
    --success-color: #10b981;
    --info-color: #0ea5e9;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    font-family: 'JetBrains Mono', monospace;
}

/* Compact specific overrides */
[data-theme="compact"] .card-grid {
    gap: 1rem;
}

[data-theme="compact"] .tcg-card-body {
    padding: 0.5rem;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.5;
    transition: background-color 0.3s, color 0.3s;
}

nav {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 2rem;
    height: var(--nav-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

.container {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
    min-height: 80vh;
}

.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 0.375rem;
    font-weight: 600;
    transition: opacity 0.2s;
    border: none;
    cursor: pointer;
}

.btn:hover {
    opacity: 0.9;
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 2rem;
}

.tcg-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    overflow: hidden;
    transition: transform 0.2s;
}

.tcg-card:hover {
    transform: translateY(-4px);
}

.tcg-card img {
    width: 100%;
    height: auto;
    display: block;
}

.tcg-card-body {
    padding: 1rem;
}

.messages {
    list-style: none;
    padding: 0;
    margin-bottom: 2rem;
}

.messages li {
    padding: 1rem;
    border-radius: 0.375rem;
    margin-bottom: 0.5rem;
}

.messages .success {
    background-color: #064e3b;
    color: #a7f3d0;
}

.messages .error {
    background-color: #7f1d1d;
    color: #fecaca;
}

[data-theme="light"] .messages .success {
    background-color: #d1fae5;
    color: #065f46;
}

[data-theme="light"] .messages .error {
    background-color: #fce7f3;
    color: #9d174d;
}

/* Auth Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.auth-modal {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: translateY(20px);
    transition: transform 0.3s;
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.modal-overlay.active .auth-modal {
    transform: translateY(0);
}

.auth-modal h2 {
    margin-top: 0;
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.auth-modal p {
    margin-bottom: 2rem;
    color: var(--text-color);
    line-height: 1.6;
}

.auth-modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background-color: rgba(99, 102, 241, 0.1);
}

.close-modal {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    opacity: 0.5;
    padding: 0;
    line-height: 1;
}

.close-modal:hover {
    opacity: 1;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-menu-btn .bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    -webkit-transition: all 0.3s ease-in-out;
    transition: all 0.3s ease-in-out;
    background-color: var(--text-color);
}

/* Media Queries */
@media (max-width: 768px) {

    /* Navigation */
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        position: fixed;
        left: -100%;
        top: var(--nav-height);
        gap: 0;
        flex-direction: column;
        background-color: var(--card-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 1rem;
    }

    .nav-links.active {
        left: 0;
    }

    .nav-links a {
        margin: 1rem 0;
        display: block;
    }

    /* Card Layout - Move filters to top */
    .browse-container {
        grid-template-columns: 1fr !important;
        /* Force single column */
    }

    .browse-sidebar {
        width: 100% !important;
        margin-bottom: 1rem;
    }

    .browse-sidebar form {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .browse-sidebar button {
        grid-column: span 2;
    }
}