:root {
    --primary-color: #2196F3;
    --success-color: #4CAF50;
    --warning-color: #FFC107;
    --danger-color: #F44336;
    --purple-color: #9C27B0;
    --white: #ffffff;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #757575;
    --text-dark: #212121;
    --text-light: #666666;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--light-gray) 0%, #fafafa 100%);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(33, 150, 243, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(76, 175, 80, 0.05) 0%, transparent 50%);
    min-height: 100vh;
    color: var(--text-dark);
    padding-bottom: 80px;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23f0f0f0' fill-opacity='0.3'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.1;
    pointer-events: none;
    z-index: -1;
}

.app-header {
    background: linear-gradient(135deg, var(--primary-color), var(--purple-color));
    color: var(--white);
    padding: 1.5rem 1rem;
    text-align: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
}

.main-content {
    padding: 1rem;
    max-width: 100%;
    margin: 0 auto;
}

.section {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.welcome-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    text-align: center;
}

.welcome-card h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.welcome-card p {
    color: var(--text-light);
    margin-bottom: 2rem;
    font-size: 1.1rem;
}

.quick-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.action-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    min-width: 140px;
    justify-content: center;
}

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

.action-btn.primary:hover {
    background: #1976D2;
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.action-btn.secondary {
    background: var(--white);
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.action-btn.secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

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

.action-btn.success:hover {
    background: #388E3C;
    transform: translateY(-2px);
}

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

.action-btn.danger:hover {
    background: #D32F2F;
    transform: translateY(-2px);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.stat-card i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.stat-card h3 {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.stat-card p {
    color: var(--text-light);
    font-size: 0.9rem;
}

.game-setup {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.game-setup h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-dark);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.game-active {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.game-header h2 {
    color: var(--primary-color);
    flex: 1;
}

.game-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.timer-section {
    background: linear-gradient(135deg, var(--light-gray), #fafafa);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.current-player h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.timer-display {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 1rem 0;
    font-family: 'Courier New', monospace;
}

.timer-display.warning {
    color: var(--warning-color);
    animation: pulse 1s infinite;
}

.timer-display.danger {
    color: var(--danger-color);
    animation: pulse 0.5s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.score-section {
    margin-top: 2rem;
}

.score-section h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    text-align: center;
}

.score-board {
    display: grid;
    gap: 1rem;
}

.player-score {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--light-gray);
    border-radius: var(--border-radius);
    border: 2px solid transparent;
    transition: var(--transition);
}

.player-score.current-turn {
    border-color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

.player-score .player-name {
    font-weight: 600;
    color: var(--text-dark);
}

.player-score .score-input {
    width: 80px;
    padding: 0.5rem;
    border: 1px solid var(--medium-gray);
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
}

.rules-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.rules-header h2 {
    color: var(--primary-color);
}

.search-section {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

.search-box {
    position: relative;
    margin-bottom: 1rem;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
}

.search-box i {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
}

.rules-list {
    display: grid;
    gap: 1rem;
}

.rule-item {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.rule-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.rule-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    gap: 1rem;
}

.rule-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-dark);
    flex: 1;
}

.rule-game {
    background: var(--primary-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
}

.rule-category {
    background: var(--success-color);
    color: var(--white);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-left: 0.5rem;
}

.rule-content {
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.rule-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
}

.rule-actions button {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.rule-actions .edit-btn {
    background: var(--warning-color);
    color: var(--white);
}

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

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.history-header h2 {
    color: var(--primary-color);
}

.history-filters {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.history-filters select {
    padding: 0.5rem;
    border: 2px solid var(--medium-gray);
    border-radius: var(--border-radius);
    background: var(--white);
}

.history-list {
    display: grid;
    gap: 1rem;
}

.history-item {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.history-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.history-header-info {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.history-game {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
}

.history-date {
    color: var(--text-light);
    font-size: 0.9rem;
}

.history-players {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.history-player {
    background: var(--light-gray);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

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

.history-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.history-stat {
    text-align: center;
}

.history-stat-value {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
}

.history-stat-label {
    font-size: 0.8rem;
    color: var(--text-light);
}

.history-actions {
    display: flex;
    gap: 0.5rem;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    padding: 1rem;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--white);
    border-radius: var(--border-radius);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-hover);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--medium-gray);
}

.modal-header h3 {
    color: var(--primary-color);
    margin: 0;
}

.close-modal {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-light);
    padding: 0.5rem;
    border-radius: 50%;
    transition: var(--transition);
}

.close-modal:hover {
    background: var(--light-gray);
    color: var(--text-dark);
}

.modal form {
    padding: 1.5rem;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
    margin-top: 2rem;
}

.faq-section {
    background: var(--white);
    border-radius: var(--border-radius);
    padding: 2rem;
    margin: 2rem 1rem;
    box-shadow: var(--shadow);
}

.faq-section h2 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    text-align: center;
}

.faq-container {
    display: grid;
    gap: 1rem;
}

.faq-item {
    border: 1px solid var(--medium-gray);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 1rem 1.5rem;
    background: var(--light-gray);
    border: none;
    text-align: left;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--medium-gray);
}

.faq-question[aria-expanded="true"] {
    background: var(--primary-color);
    color: var(--white);
}

.faq-icon {
    font-size: 1.2rem;
    font-weight: bold;
    transition: var(--transition);
}

.faq-question[aria-expanded="true"] .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 1.5rem;
    background: var(--white);
    border-top: 1px solid var(--medium-gray);
    animation: fadeIn 0.3s ease-in-out;
}

.faq-answer p {
    color: var(--text-light);
    line-height: 1.6;
    margin: 0;
}

.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--white);
    border-top: 1px solid var(--medium-gray);
    display: flex;
    justify-content: space-around;
    padding: 0.5rem 0;
    z-index: 100;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1);
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 0.5rem;
    text-decoration: none;
    color: var(--text-light);
    transition: var(--transition);
    border-radius: 8px;
    min-width: 60px;
}

.nav-item:hover {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

.nav-item.active {
    color: var(--primary-color);
    background: rgba(33, 150, 243, 0.1);
}

.nav-item i {
    font-size: 1.2rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 600;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-light);
    font-size: 0.9rem;
    background: var(--white);
    margin-top: 2rem;
    border-top: 1px solid var(--medium-gray);
}

.empty-state {
    text-align: center;
    padding: 3rem 1rem;
    color: var(--text-light);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

@media (max-width: 768px) {
    .main-content {
        padding: 0.5rem;
    }
    
    .welcome-card {
        padding: 1.5rem;
    }
    
    .quick-actions {
        flex-direction: column;
    }
    
    .action-btn {
        min-width: auto;
        width: 100%;
    }
    
    .game-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .game-actions {
        justify-content: center;
    }
    
    .timer-display {
        font-size: 2.5rem;
    }
    
    .history-header,
    .rules-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .history-filters {
        justify-content: center;
    }
    
    .modal {
        padding: 0.5rem;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .faq-section {
        margin: 1rem 0.5rem;
        padding: 1.5rem;
    }
}

@media (min-width: 769px) {
    .main-content {
        max-width: 1200px;
        padding: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .rules-list {
        grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    }
    
    .history-list {
        grid-template-columns: repeat(auto-fit, minmax(500px, 1fr));
    }
}