/* ===== CSS Variables & Root Setup ===== */
:root {
    /* Core Colors */
    --primary-500: #3b82f6;
    --primary-600: #2563eb;
    --primary-700: #1d4ed8;
    --secondary-500: #8b5cf6;
    --secondary-600: #7c3aed;
    
    /* Light Theme */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-elevated: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #64748b;
    --border-primary: #e2e8f0;
    --border-secondary: #cbd5e1;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Status Colors */
    --success-500: #10b981;
    --warning-500: #f59e0b;
    --error-500: #ef4444;
    --info-500: #06b6d4;
    
    /* Pokemon Type Colors */
    --type-grass: #78c850;
    --type-fire: #f08030;
    --type-water: #6890f0;
    --type-electric: #f8d030;
    --type-psychic: #f85888;
    --type-ice: #98d8d8;
    --type-dragon: #7038f8;
    --type-dark: #705848;
    --type-fighting: #c03028;
    --type-poison: #a040a0;
    --type-ground: #e0c068;
    --type-flying: #a890f0;
    --type-bug: #a8b820;
    --type-rock: #b8a038;
    --type-ghost: #705898;
    --type-steel: #b8b8d0;
    --type-fairy: #ee99ac;
    --type-normal: #a8a878;
    
    /* Spacing & Sizing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-family-display: 'Orbitron', monospace;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Layout */
    --header-height: 4rem;
    --sidebar-width: 320px;
    --max-content-width: 1400px;
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-elevated: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --text-tertiary: #94a3b8;
    --border-primary: #334155;
    --border-secondary: #475569;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.3);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.3);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.3), 0 4px 6px -4px rgb(0 0 0 / 0.3);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.3), 0 8px 10px -6px rgb(0 0 0 / 0.3);
}

/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-base), color var(--transition-base);
}

/* ===== Loading Screen ===== */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-content {
    text-align: center;
    color: white;
}

.pokeball-loader {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-6);
    position: relative;
    border-radius: 50%;
    background: linear-gradient(180deg, #ff0000 50%, #ffffff 50%);
    border: 4px solid #000;
    animation: pokeball-spin 2s linear infinite;
}

.pokeball-loader::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    background: #ffffff;
    border: 3px solid #000;
    border-radius: 50%;
    z-index: 2;
}

.pokeball-loader::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 4px;
    background: #000;
    transform: translateY(-50%);
    z-index: 1;
}

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

.loading-content h2 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.loading-content p {
    font-size: var(--font-size-base);
    opacity: 0.9;
}

/* ===== App Container ===== */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== Header ===== */
.app-header {
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-primary);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 50;
    backdrop-filter: blur(12px);
}

.header-content {
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: var(--header-height);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: var(--shadow-md);
}

.logo-icon svg {
    width: 24px;
    height: 24px;
}

.logo-text h1 {
    font-family: var(--font-family-display);
    font-size: var(--font-size-2xl);
    font-weight: 800;
    color: var(--text-primary);
    margin: 0;
    background: linear-gradient(135deg, var(--primary-600), var(--secondary-600));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-text p {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

.theme-toggle {
    width: 40px;
    height: 40px;
    border: none;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    border: 1px solid var(--border-primary);
}

.theme-toggle:hover {
    background: var(--bg-tertiary);
    transform: scale(1.05);
}

.theme-icon {
    font-size: var(--font-size-lg);
}

/* ===== Main Content ===== */
.main-content {
    flex: 1;
    max-width: var(--max-content-width);
    margin: 0 auto;
    padding: var(--space-8) var(--space-6);
    width: 100%;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-8);
    align-items: start;
}

/* ===== Deck Panel ===== */
.deck-panel {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-primary);
    overflow: hidden;
}

.deck-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
}

.deck-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.deck-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.action-group {
    display: flex;
    gap: var(--space-2);
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
}

.action-btn svg {
    width: 16px;
    height: 16px;
}

.action-btn.primary {
    background: var(--primary-500);
    color: white;
}

.action-btn.primary:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.action-btn.secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-primary);
}

.action-btn.secondary:hover {
    background: var(--bg-secondary);
    transform: translateY(-1px);
}

.action-btn.danger {
    background: var(--error-500);
    color: white;
}

.action-btn.danger:hover {
    background: #dc2626;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* ===== Deck Stats ===== */
.deck-stats {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-primary);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: var(--space-3);
}

.stat-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-3);
    display: flex;
    align-items: center;
    gap: var(--space-2);
    transition: all var(--transition-base);
}

.stat-card:hover {
    background: var(--bg-tertiary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.stat-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.stat-icon.total { background: linear-gradient(135deg, #6366f1, #8b5cf6); }
.stat-icon.pokemon { background: linear-gradient(135deg, #f59e0b, #f97316); }
.stat-icon.energy { background: linear-gradient(135deg, #eab308, #facc15); }
.stat-icon.trainer { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.stat-icon.price { background: linear-gradient(135deg, #10b981, #059669); }

.stat-icon svg {
    width: 16px;
    height: 16px;
}

.stat-content {
    display: flex;
    flex-direction: column;
}

.stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1.2;
}

.stat-value {
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

/* ===== Deck Display ===== */
.deck-container {
    padding: var(--space-6);
    max-height: 600px;
    overflow-y: auto;
}

.deck-display {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-4);
}

/* ===== Search Panel ===== */
.search-panel {
    background: var(--bg-elevated);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-primary);
    overflow: hidden;
}

.search-header {
    padding: var(--space-6);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-secondary);
}

.search-header h2 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.search-help {
    position: relative;
}

.help-toggle {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-base);
    color: var(--text-secondary);
}

.help-toggle:hover {
    background: var(--primary-500);
    color: white;
    transform: scale(1.05);
}

.help-toggle svg {
    width: 16px;
    height: 16px;
}

.search-help-content {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: var(--space-4);
    width: 300px;
    z-index: 10;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
}

.search-help:hover .search-help-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.help-item {
    padding: var(--space-2) 0;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.help-item:not(:last-child) {
    border-bottom: 1px solid var(--border-primary);
}

.help-item strong {
    color: var(--text-primary);
}

/* ===== Search Controls ===== */
.search-controls {
    padding: var(--space-4);
    border-bottom: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.search-input-container {
    position: relative;
    display: flex;
    flex: 1;
}

.search-input-container input {
    flex: 1;
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.search-input-container input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

.search-btn {
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--primary-500);
    border-left: none;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    background: var(--primary-500);
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
}

.search-btn:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
}

.search-btn svg {
    width: 20px;
    height: 20px;
}

.sort-container {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex-shrink: 0;
}

.sort-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    font-weight: 500;
    white-space: nowrap;
}

.sort-select {
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all var(--transition-base);
    min-width: 140px;
}

.sort-select:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

/* ===== Search Results ===== */
.search-results-container {
    padding: var(--space-6);
    max-height: 800px;
    overflow-y: auto;
}

.search-results {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-4);
}

/* ===== Cards ===== */
.card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    transition: all var(--transition-base);
    cursor: pointer;
    group: card;
}

.card:hover {
    transform: translateY(-4px) scale(1.02);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-500);
}

.card img {
    width: 100%;
    height: auto;
    display: block;
    transition: all var(--transition-base);
}

.card-buttons {
    position: absolute;
    top: var(--space-2);
    right: var(--space-2);
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
    opacity: 0;
    transition: all var(--transition-base);
}

.card:hover .card-buttons {
    opacity: 1;
}

.card-button {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-full);
    background: rgba(0, 0, 0, 0.8);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-lg);
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
}

.card-button:hover {
    background: var(--primary-500);
    transform: scale(1.1);
}

.increase-button:hover {
    background: var(--success-500);
}

.decrease-button:hover {
    background: var(--error-500);
}

.price-badge {
    position: absolute;
    bottom: var(--space-2);
    left: var(--space-2);
    background: rgba(16, 185, 129, 0.95);
    color: white;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 600;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-base);
    opacity: 1;
    transform: scale(1);
}

.card:hover .price-badge {
    background: rgba(16, 185, 129, 1);
    transform: scale(1.05);
}

.card-count {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    background: var(--primary-500);
    color: white;
    padding: var(--space-1) var(--space-2);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 700;
    box-shadow: var(--shadow-md);
}

/* ===== Empty States ===== */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-16) var(--space-8);
    color: var(--text-tertiary);
}

.empty-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-4);
    opacity: 0.5;
}

.empty-icon svg {
    width: 100%;
    height: 100%;
}

.empty-state h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--space-2);
}

.empty-state p {
    font-size: var(--font-size-base);
}

/* ===== Loading Indicator ===== */
.loading-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-8);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-primary);
    border-top: 2px solid var(--primary-500);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* ===== Game Start Button ===== */
.game-start-button {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 80px;
    height: 80px;
    border: none;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--success-500), #059669);
    color: white;
    cursor: pointer;
    box-shadow: var(--shadow-xl);
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.8);
    z-index: 40;
}

.game-start-button.visible {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
}

.game-start-button:hover {
    transform: scale(1.1);
    box-shadow: 0 20px 40px -5px rgba(16, 185, 129, 0.4);
}

.game-button-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.stacked-cards {
    width: 32px;
    height: 24px;
    position: relative;
}

.stacked-cards::before,
.stacked-cards::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 16px;
    background: white;
    border-radius: var(--radius-sm);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.stacked-cards::before {
    top: 0;
    left: 0;
    transform: rotate(-5deg);
}

.stacked-cards::after {
    top: 2px;
    left: 8px;
    transform: rotate(5deg);
}

.stacked-cards.shuffle-animation {
    animation: shuffle 0.5s ease-in-out;
}

@keyframes shuffle {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-2px) rotate(-2deg); }
    75% { transform: translateX(2px) rotate(2deg); }
}

.game-button-text {
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===== Game Overlay ===== */
.game-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-slow);
    backdrop-filter: blur(20px);
}

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

.game-content {
    width: 90vw;
    max-width: 1200px;
    height: 90vh;
    position: relative;
    display: flex;
    flex-direction: column;
}

.close-game {
    position: absolute;
    top: 0;
    right: 0;
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-base);
    z-index: 10;
}

.close-game:hover {
    background: var(--error-500);
    transform: scale(1.1);
}

.close-game svg {
    width: 20px;
    height: 20px;
}

.game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--space-8);
}

.prize-cards-container,
.player-hand-container {
    text-align: center;
}

.prize-cards-container h3,
.player-hand-container h3 {
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: var(--space-6);
}

.prize-cards {
    display: flex;
    justify-content: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.player-hand {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    position: relative;
    height: 200px;
}

.game-card {
    width: 120px;
    height: 168px;
    position: relative;
    transform-style: preserve-3d;
    transition: all 0.6s ease;
    cursor: pointer;
}

.game-card.dealing {
    transform: translateY(-100vh) rotate(720deg);
}

.game-card.dealt {
    transform: translateY(0) rotate(0deg);
}

.game-card.in-hand {
    position: absolute;
    bottom: 0;
}

.game-card .front,
.game-card .back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.game-card .front {
    transform: rotateY(180deg);
}

.game-card .back {
    background: linear-gradient(135deg, #1e3a8a, #3730a3);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.game-card .front img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.game-card:hover {
    transform: translateY(-10px) scale(1.05);
}

/* ===== Modal Overlay ===== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
}

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

.modal-content {
    max-width: 90vw;
    max-height: 90vh;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: modalEnter 0.3s ease-out;
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-content img {
    width: 100%;
    height: auto;
    display: block;
}

.export-options {
    background: var(--bg-elevated);
    padding: var(--space-8);
    text-align: center;
    border-radius: var(--radius-xl);
    min-width: 400px;
}

.export-options h3 {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-6);
}

.export-options button {
    display: block;
    width: 100%;
    padding: var(--space-4);
    margin-bottom: var(--space-3);
    border: none;
    border-radius: var(--radius-md);
    background: var(--primary-500);
    color: white;
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
}

.export-options button:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.export-options button:last-child {
    margin-bottom: 0;
}

/* ===== Toast Container ===== */
.toast-container {
    position: fixed;
    top: var(--space-8);
    right: var(--space-8);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.toast {
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    box-shadow: var(--shadow-lg);
    min-width: 300px;
    animation: toastEnter 0.3s ease-out;
}

.toast.success {
    border-left: 4px solid var(--success-500);
}

.toast.error {
    border-left: 4px solid var(--error-500);
}

.toast.info {
    border-left: 4px solid var(--info-500);
}

@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ===== Footer ===== */
.app-footer {
    margin-top: auto;
    padding: var(--space-8) var(--space-6);
    border-top: 1px solid var(--border-primary);
    background: var(--bg-secondary);
}

.footer-content {
    max-width: var(--max-content-width);
    margin: 0 auto;
    text-align: center;
}

.disclaimer {
    font-size: var(--font-size-sm);
    color: var(--text-tertiary);
    line-height: 1.6;
}

/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
        gap: var(--space-2);
    }
}

@media (max-width: 768px) {
    :root {
        --space-base: 0.75rem;
    }

    .header-content {
        padding: var(--space-3) var(--space-4);
    }

    .main-content {
        padding: var(--space-4);
        gap: var(--space-4);
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-2);
    }

    .deck-actions {
        flex-wrap: wrap;
        gap: var(--space-2);
    }

    .action-group {
        flex-wrap: wrap;
    }

    .search-controls {
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-3);
    }

    .sort-container {
        align-self: flex-start;
    }

    .search-results {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--space-3);
    }

    .deck-display {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .game-start-button {
        width: 160px;
        height: 160px;
        right: var(--space-4);
        bottom: var(--space-4);
    }

    .game-button-text {
        font-size: var(--font-size-sm);
    }
}

@media (max-width: 480px) {
    .logo-text h1 {
        font-size: var(--font-size-lg);
    }

    .logo-text p {
        font-size: var(--font-size-xs);
    }

    .search-controls {
        padding: var(--space-3);
    }

    .sort-container {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-1);
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .modal-content {
        margin: var(--space-4);
    }

    .export-options {
        padding: var(--space-4);
    }
}

/* ===== Scrollbar Styling ===== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-secondary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-tertiary);
}

/* ===== Focus States ===== */
*:focus {
    outline: 2px solid var(--primary-500);
    outline-offset: 2px;
}

button:focus,
input:focus,
select:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgb(59 130 246 / 0.1);
}

/* ===== Print Styles ===== */
@media print {
    .app-header,
    .search-panel,
    .game-start-button,
    .app-footer {
        display: none;
    }
    
    .main-content {
        grid-template-columns: 1fr;
        padding: 0;
    }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}