/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #f5f5f5 0%, #e8e8e8 100%);
    background-attachment: fixed;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    padding-bottom: 80px;
}

/* Paper texture effect */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 1px 1px, rgba(0,0,0,.15) 1px, transparent 0);
    background-size: 20px 20px;
    pointer-events: none;
    z-index: -1;
    opacity: 0.1;
}

/* Color Variables */
:root {
    --primary-blue: #2196F3;
    --success-green: #4CAF50;
    --warning-yellow: #FFC107;
    --error-red: #F44336;
    --accent-purple: #9C27B0;
    --text-dark: #333;
    --text-light: #666;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 4px 20px rgba(0,0,0,0.15);
    --border-radius: 12px;
}

/* Header */
.app-header {
    background: linear-gradient(135deg, var(--primary-blue), #1976D2);
    color: white;
    padding: 1rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.app-header h1 {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.header-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    opacity: 0.9;
}

/* Main Content */
.app-main {
    padding: 1rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* Content Sections */
.content-section {
    display: none;
    animation: fadeIn 0.3s ease-in;
}

.content-section.active {
    display: block;
}

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

/* Section Headers */
.section-header {
    margin-bottom: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-header h2 {
    color: var(--text-dark);
    font-size: 1.5rem;
    font-weight: 600;
}

.section-header p {
    color: var(--text-light);
    margin-top: 0.25rem;
}

/* Buttons */
.cta-button, .add-button, .mode-btn, .control-btn, .submit-btn, .end-btn {
    background: linear-gradient(135deg, var(--primary-blue), #1976D2);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    box-shadow: var(--shadow);
}

.cta-button:hover, .add-button:hover, .mode-btn:hover, .control-btn:hover, .submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.end-btn {
    background: linear-gradient(135deg, var(--error-red), #d32f2f);
}

/* Cards */
.welcome-card, .mode-card, .education-article, .faq-item {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.welcome-card:hover, .mode-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

/* Quick Stats */
.quick-stats {
    display: flex;
    justify-content: space-around;
    margin: 1.5rem 0;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.stat-item i {
    color: var(--primary-blue);
    font-size: 1.5rem;
}

.stat-item span {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-dark);
}

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

/* Activity List */
.activity-list {
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    background: var(--bg-light);
    border-radius: 8px;
    margin-bottom: 0.5rem;
    transition: all 0.2s ease;
}

.activity-item:hover {
    background: #e3f2fd;
}

.activity-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-blue);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.activity-info h4 {
    font-size: 0.95rem;
    color: var(--text-dark);
    margin-bottom: 0.25rem;
}

.activity-info p {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
}

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

/* Form Modal */
.form-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
}

.form-modal.hidden {
    display: none;
}

.form-content {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.form-content h3 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

.form-content input,
.form-content textarea,
.form-content select {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.95rem;
    transition: border-color 0.3s ease;
}

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

.form-buttons {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

.form-buttons button {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    transition: all 0.3s ease;
}

.form-buttons button[type="submit"] {
    background: var(--success-green);
    color: white;
}

.form-buttons button[type="button"] {
    background: #ddd;
    color: var(--text-dark);
}

/* Palaces Grid */
.palaces-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.palace-card {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
}

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

.palace-card h3 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.palace-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.palace-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-bottom: 1rem;
}

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

.palace-actions button {
    flex: 1;
    padding: 0.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.8rem;
    transition: all 0.3s ease;
}

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

.delete-btn {
    background: var(--error-red);
    color: white;
}

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

/* Canvas Container */
.canvas-container {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    margin-top: 1rem;
}

.canvas-container.hidden {
    display: none;
}

.canvas-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bg-light);
}

.canvas-controls {
    display: flex;
    gap: 0.5rem;
}

#palace-canvas {
    width: 100%;
    height: 400px;
    border: 2px solid var(--bg-light);
    border-radius: 8px;
    cursor: crosshair;
}

/* Item Form */
.item-form {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-light);
    border-radius: 8px;
}

.item-form.hidden {
    display: none;
}

.item-form h4 {
    margin-bottom: 1rem;
    color: var(--text-dark);
}

/* Training Modes */
.training-modes {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.mode-card {
    text-align: center;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.mode-card:hover {
    border-color: var(--primary-blue);
}

.mode-card i {
    font-size: 2.5rem;
    color: var(--primary-blue);
    margin-bottom: 1rem;
}

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

.mode-card p {
    color: var(--text-light);
    margin-bottom: 1.5rem;
}

/* Training Session */
.training-session {
    background: var(--bg-white);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.training-session.hidden {
    display: none;
}

.session-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--bg-light);
}

.session-progress {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--primary-blue);
}

.question-area {
    margin-bottom: 1.5rem;
}

.question-area h4 {
    color: var(--text-dark);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.question-options {
    display: grid;
    gap: 0.75rem;
}

.option-btn {
    background: var(--bg-light);
    border: 2px solid transparent;
    padding: 1rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
}

.option-btn:hover {
    background: #e3f2fd;
    border-color: var(--primary-blue);
}

.option-btn.selected {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

.session-controls {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.submit-btn:disabled {
    background: #ddd;
    color: #999;
    cursor: not-allowed;
}

/* Session Results */
.session-results {
    text-align: center;
    padding: 2rem;
}

.session-results.hidden {
    display: none;
}

.results-stats {
    display: flex;
    justify-content: space-around;
    margin: 2rem 0;
}

.result-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.result-value {
    font-size: 2rem;
    font-weight: 600;
    color: var(--primary-blue);
}

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

/* Training Stats */
.training-stats {
    display: flex;
    gap: 1rem;
    font-size: 0.9rem;
    color: var(--text-light);
}

/* Education Categories */
.education-categories {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

.category-card {
    background: var(--bg-white);
    border: 2px solid transparent;
    border-radius: var(--border-radius);
    padding: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    min-width: 120px;
    text-align: center;
    white-space: nowrap;
}

.category-card:hover,
.category-card.active {
    border-color: var(--primary-blue);
    background: #e3f2fd;
}

.category-card i {
    font-size: 1.5rem;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.category-card h3 {
    font-size: 0.9rem;
    color: var(--text-dark);
}

/* Education Content */
.education-content {
    min-height: 400px;
}

.content-category {
    display: block;
}

.content-category.hidden {
    display: none;
}

.education-article {
    margin-bottom: 1.5rem;
}

.education-article h3 {
    color: var(--text-dark);
    margin-bottom: 1rem;
}

.education-article h4 {
    color: var(--primary-blue);
    margin: 1rem 0 0.5rem 0;
}

.education-article ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

.education-article li {
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.benefits-grid,
.technique-list,
.advanced-techniques {
    display: grid;
    gap: 1rem;
    margin: 1rem 0;
}

.benefit-item,
.technique-item,
.advanced-item {
    background: var(--bg-light);
    padding: 1rem;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.benefit-item i {
    color: var(--primary-blue);
    font-size: 1.25rem;
}

.technique-item,
.advanced-item {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
}

.technique-item h4,
.advanced-item h4 {
    color: var(--accent-purple);
    margin: 0 0 0.5rem 0;
}

/* FAQ Styles */
.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 0.5rem;
    border: 2px solid transparent;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary-blue);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    padding: 1rem;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.faq-question:hover {
    color: var(--primary-blue);
}

.faq-icon {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--primary-blue);
    transition: transform 0.3s ease;
}

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

.faq-answer {
    padding: 0 1rem 1rem 1rem;
    color: var(--text-light);
    line-height: 1.6;
    animation: slideDown 0.3s ease-out;
}

.faq-answer[hidden] {
    display: none;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 200px;
    }
}

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

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--text-light);
    padding: 0.5rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    min-width: 60px;
}

.nav-item:hover,
.nav-item.active {
    color: var(--primary-blue);
    background: #e3f2fd;
}

.nav-item i {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.nav-item span {
    font-size: 0.7rem;
    font-weight: 500;
}

/* Footer */
footer {
    background: var(--text-dark);
    color: white;
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    margin-top: 2rem;
    margin-bottom: 80px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-main {
        padding: 0.75rem;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .quick-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .stat-item {
        flex-direction: row;
        justify-content: space-between;
    }
    
    .palaces-grid {
        grid-template-columns: 1fr;
    }
    
    .training-modes {
        grid-template-columns: 1fr;
    }
    
    .results-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .education-categories {
        justify-content: flex-start;
    }
    
    .benefits-grid,
    .technique-list,
    .advanced-techniques {
        grid-template-columns: 1fr;
    }
    
    .canvas-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
    
    .canvas-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    #palace-canvas {
        height: 300px;
    }
    
    .form-buttons {
        flex-direction: column;
    }
    
    .session-header {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .session-controls {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .app-header {
        padding: 0.75rem;
    }
    
    .app-header h1 {
        font-size: 1.25rem;
    }
    
    .header-stats {
        flex-direction: column;
        gap: 0.25rem;
    }
    
    .welcome-card,
    .mode-card,
    .education-article,
    .faq-item {
        padding: 1rem;
    }
    
    .nav-item span {
        font-size: 0.65rem;
    }
    
    .form-content {
        margin: 0.5rem;
        padding: 1rem;
    }
    
    #palace-canvas {
        height: 250px;
    }
}

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

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --shadow: 0 2px 10px rgba(0,0,0,0.3);
        --shadow-hover: 0 4px 20px rgba(0,0,0,0.4);
    }
    
    .form-content input,
    .form-content textarea,
    .form-content select {
        border-width: 3px;
    }
    
    .nav-item.active {
        background: var(--primary-blue);
        color: white;
    }
}

/* Print styles */
@media print {
    .bottom-nav,
    .canvas-container,
    .form-modal {
        display: none !important;
    }
    
    .content-section {
        display: block !important;
    }
    
    body {
        background: white;
        color: black;
    }
}