:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #1a1a1a;
    --text-secondary: #6b7280;
    --border: #e5e7eb;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-lg: rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] {
    --primary: #7c3aed;
    --primary-dark: #6d28d9;
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-tertiary: #0f3460;
    --text-primary: #e5e7eb;
    --text-secondary: #9ca3af;
    --border: #374151;
    --shadow: rgba(0, 0, 0, 0.3);
    --shadow-lg: rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px var(--shadow);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.nav-brand {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--text-primary);
    cursor: pointer;
}

.nav-fullscreen {
    background: none;
    border: none;
    font-size: 1.5em;
    color: var(--text-primary);
    cursor: pointer;
    padding: 8px;
    margin-right: 10px;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-fullscreen:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 5px;
}

.nav-link {
    display: block;
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.2s;
}

.nav-link:hover {
    background: var(--bg-secondary);
    color: var(--primary);
}

.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    min-height: calc(100vh - 120px);
}

.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border);
    padding: 20px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9em;
}

.auth-page {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-card {
    background: var(--bg-primary);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px var(--shadow-lg);
}

.auth-card h1 {
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 2em;
    text-align: center;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.auth-form {
    margin-bottom: 20px;
}

.auth-info {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 8px;
    font-size: 0.9em;
    color: var(--text-secondary);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 1em;
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color 0.2s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 1em;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: all 0.2s;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--border);
}

.btn-success {
    background: var(--success);
    color: white;
}

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

.btn-block {
    width: 100%;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1.2em;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 0.9em;
}

.alert {
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 20px;
}

.alert-error {
    background: #fee;
    border: 1px solid #fcc;
    color: #c33;
}

.alert-success {
    background: #efe;
    border: 1px solid #cfc;
    color: #3c3;
}

.alert-info {
    background: #e3f2fd;
    border: 1px solid #90caf9;
    color: #1976d2;
}

.card {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px var(--shadow);
    margin-bottom: 20px;
}

.card-header {
    font-size: 1.3em;
    font-weight: bold;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.grid {
    display: grid;
    gap: 20px;
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
}

.grid-4 {
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

.game-type-card {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 12px var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
    text-decoration: none;
    color: var(--text-primary);
}

.game-type-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px var(--shadow-lg);
}

.game-type-icon {
    font-size: 4em;
    margin-bottom: 15px;
}

.game-type-name {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 10px;
}

.game-type-info {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.player-list {
    list-style: none;
}

.player-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 10px;
    -webkit-user-select: none;
    user-select: none;
}

.reorder-buttons {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-left: auto;
    flex-shrink: 0;
}

.btn-reorder {
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 1.2em;
    padding: 8px 12px;
    cursor: pointer;
    line-height: 1;
    transition: background 0.15s;
    min-width: 44px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-reorder:hover:not(:disabled) {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.btn-reorder:disabled {
    opacity: 0.25;
    cursor: default;
}

.btn-reorder:active:not(:disabled) {
    transform: scale(0.95);
}

.player-avatar {
    font-size: 2em;
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.player-info {
    flex: 1;
}

.player-name {
    font-weight: bold;
    font-size: 1.1em;
}

.player-stats {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.player-actions {
    display: flex;
    gap: 10px;
}

.score-table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
}

.score-table th {
    background: var(--primary);
    color: white;
    padding: 12px;
    text-align: left;
    font-weight: 600;
}

.score-table td {
    padding: 12px;
    border-bottom: 1px solid var(--border);
}

.score-table tr:hover {
    background: var(--bg-secondary);
}

.score-input {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 20px 0;
}

.score-btn {
    padding: 20px;
    font-size: 1.5em;
    border: 2px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.score-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.score-btn:active {
    transform: scale(0.95);
}

.numpad {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 300px;
    margin: 20px auto;
}

.numpad-btn {
    padding: 24px;
    font-size: 1.8em;
    font-weight: bold;
    border: none;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s;
}

.numpad-btn:hover {
    background: var(--primary);
    color: white;
}

.numpad-btn:active {
    transform: scale(0.95);
}

.player-score-bar {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 10px;
}

.player-score-bar.active {
    background: var(--primary);
    color: white;
}

.score-bar-fill {
    flex: 1;
    height: 30px;
    background: var(--bg-tertiary);
    border-radius: 15px;
    overflow: hidden;
}

.score-bar-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--success), var(--primary));
    transition: width 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 30px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    font-size: 1.5em;
    font-weight: bold;
    margin-bottom: 20px;
}

.modal-close {
    float: right;
    font-size: 1.5em;
    cursor: pointer;
    color: var(--text-secondary);
}

#toast-container {
    position: fixed;
    top: 80px;
    right: 20px;
    z-index: 3000;
}

.toast {
    background: var(--bg-primary);
    border-left: 4px solid var(--primary);
    border-radius: 8px;
    padding: 15px 20px;
    margin-bottom: 10px;
    box-shadow: 0 4px 12px var(--shadow-lg);
    min-width: 250px;
    animation: slideIn 0.3s ease-out;
}

.toast.success {
    border-left-color: var(--success);
}

.toast.error {
    border-left-color: var(--danger);
}

.toast.warning {
    border-left-color: var(--warning);
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.achievement-toast {
    background: linear-gradient(135deg, #ffd700, #ffed4e);
    color: #000;
    border: none;
    padding: 20px;
}

.achievement-icon {
    font-size: 2em;
    margin-bottom: 10px;
}

.theme-toggle {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: 20px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 1.2em;
}

.error-page {
    text-align: center;
    padding: 60px 20px;
}

.error-page h1 {
    font-size: 6em;
    color: var(--primary);
    margin-bottom: 20px;
}

.error-page p {
    font-size: 1.5em;
    color: var(--text-secondary);
    margin-bottom: 30px;
}

/* Tablet-specific compact layout */
@media (max-width: 1024px) and (min-width: 769px) {
    .card {
        padding: 15px;
        margin-bottom: 15px;
    }
    
    .card-header {
        font-size: 1.1em;
        margin-bottom: 10px;
    }
    
    .page-header {
        margin-bottom: 10px;
    }
    
    .numpad-btn {
        padding: 16px;
        font-size: 1.3em;
        min-height: 48px;
    }
    
    .numpad {
        gap: 8px;
        margin: 15px auto;
    }
    
    .player-score-bar {
        margin-bottom: 8px;
        padding: 12px;
    }
    
    .score-input input {
        font-size: 1.6em;
    }
    
    .btn-lg {
        padding: 12px 20px;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
        background: var(--bg-primary);
        flex-direction: column;
        border-bottom: 1px solid var(--border);
        box-shadow: 0 4px 8px var(--shadow);
        z-index: 999;
        padding: 0;
        margin: 0;
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .nav-link {
        padding: 15px 20px;
    }
    
    .grid-2,
    .grid-3,
    .grid-4 {
        grid-template-columns: 1fr;
    }
    
    .score-input {
        grid-template-columns: repeat(2, 1fr);
    }
}

.page-header {
    margin-bottom: 30px;
}

.page-title {
    font-size: 2em;
    font-weight: bold;
    margin-bottom: 10px;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.1em;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--bg-primary);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 8px var(--shadow);
}

.stat-value {
    font-size: 2.5em;
    font-weight: bold;
    color: var(--primary);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.checkbox-item:hover {
    background: var(--bg-tertiary);
}

.checkbox-item input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-preview {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    border: 2px solid var(--border);
}

.emoji-picker {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    max-height: 200px;
    overflow-y: auto;
}

.emoji-option {
    font-size: 2em;
    padding: 10px;
    text-align: center;
    cursor: pointer;
    border-radius: 8px;
    transition: background 0.2s;
}

.emoji-option:hover {
    background: var(--bg-secondary);
}

.history-item {
    background: var(--bg-secondary);
    border-left: 4px solid var(--primary);
    padding: 15px;
    border-radius: 8px;
    margin-bottom: 10px;
}

.history-date {
    color: var(--text-secondary);
    font-size: 0.9em;
    margin-bottom: 5px;
}

.history-game {
    font-weight: bold;
    margin-bottom: 5px;
}

.history-players {
    color: var(--text-secondary);
    font-size: 0.9em;
}

.winner-badge {
    background: #ffd700;
    color: #000;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.9em;
    font-weight: bold;
    display: inline-block;
    margin-left: 10px;
}

.rank-1 { background: #ffd700; color: #000; }
.rank-2 { background: #c0c0c0; color: #000; }
.rank-3 { background: #cd7f32; color: #fff; }

/* Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--border);
    border-radius: 28px;
    transition: background 0.2s;
}

.switch-slider::before {
    content: '';
    position: absolute;
    height: 22px;
    width: 22px;
    left: 3px;
    bottom: 3px;
    background: white;
    border-radius: 50%;
    transition: transform 0.2s;
}

.switch input:checked + .switch-slider {
    background: var(--success);
}

.switch input:checked + .switch-slider::before {
    transform: translateX(24px);
}

/* Phase 10 */
.card-value-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 15px;
}

.card-value-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 15px;
    border-radius: 12px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    cursor: pointer;
    transition: transform 0.1s, box-shadow 0.1s;
    min-height: 80px;
}

.card-value-btn:active {
    transform: scale(0.95);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

.card-value-icon {
    font-size: 1.5em;
}

.card-value-label {
    font-weight: bold;
    font-size: 0.9em;
}

.card-value-points {
    color: var(--primary);
    font-weight: bold;
    font-size: 1.1em;
}

.card-value-btn[data-value="5"] {
    border-color: var(--primary);
}

.card-value-btn[data-value="10"] {
    border-color: var(--warning);
}

.card-value-btn[data-value="15"] {
    border-color: var(--danger);
}

.card-value-btn[data-value="25"] {
    border-color: gold;
    background: linear-gradient(135deg, rgba(255,215,0,0.1), transparent);
}

[data-theme="dark"] .card-value-btn {
    background: var(--bg-secondary);
}

[data-theme="dark"] .card-value-btn[data-value="25"] {
    background: linear-gradient(135deg, rgba(255,215,0,0.05), transparent);
}

.phase-badge {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 0.8em;
    background: var(--bg-primary);
    color: var(--text-secondary);
    font-weight: normal;
}

.phase-badge.phase-complete {
    background: var(--success);
    color: white;
}

@media (max-width: 1024px) and (min-width: 769px) {
    .card-value-btn {
        min-height: 65px;
        padding: 10px;
    }
}

/* UNO */
.uno-card-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 10px;
}

.uno-wild-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 15px;
}

.uno-card-grid .card-value-btn,
.uno-wild-grid .card-value-btn {
    min-height: 55px;
    padding: 8px;
}

.card-value-btn.uno-number {
    border-color: var(--primary);
}

.card-value-btn.uno-action {
    border-color: var(--danger);
    background: rgba(220, 53, 69, 0.05);
}

.card-value-btn.uno-wild {
    border-color: gold;
    background: linear-gradient(135deg, rgba(255,215,0,0.1), rgba(155,89,182,0.1));
}

[data-theme="dark"] .card-value-btn.uno-action {
    background: rgba(220, 53, 69, 0.1);
}

[data-theme="dark"] .card-value-btn.uno-wild {
    background: linear-gradient(135deg, rgba(255,215,0,0.05), rgba(155,89,182,0.05));
}