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

:root {
    --primary-color: #6B46C1;
    --secondary-color: #9333EA;
    --accent-color: #C084FC;
    --bg-color: #1F1F23;
    --surface-color: #2A2A2E;
    --text-color: #E5E5E7;
    --text-secondary: #A1A1AA;
    --success-color: #10B981;
    --error-color: #EF4444;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    text-align: center;
    padding: 40px 0;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    margin-bottom: 40px;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.language-selector {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.lang-btn {
    padding: 8px 16px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: white;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s;
}

.lang-btn:hover {
    background: rgba(255,255,255,0.2);
}

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

.palace-builder {
    margin-bottom: 60px;
}

.builder-container {
    display: grid;
    grid-template-columns: 200px 1fr 300px;
    gap: 20px;
    margin-bottom: 40px;
}

.room-selector {
    background: var(--surface-color);
    padding: 20px;
    border-radius: 12px;
}

.room-grid {
    display: grid;
    gap: 10px;
    margin-top: 15px;
}

.room-card {
    background: rgba(255,255,255,0.05);
    border: 2px solid transparent;
    padding: 15px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
}

.room-card:hover {
    background: rgba(255,255,255,0.1);
}

.room-card.active {
    border-color: var(--accent-color);
    background: rgba(192,132,252,0.2);
}

.room-icon {
    font-size: 2rem;
    margin-bottom: 5px;
}

.palace-view {
    background: var(--surface-color);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
}

.room-3d {
    position: relative;
    height: 500px;
}

#palaceCanvas {
    width: 100%;
    height: 100%;
    cursor: grab;
}

#palaceCanvas:active {
    cursor: grabbing;
}

.location-markers {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.location-marker {
    position: absolute;
    width: 40px;
    height: 40px;
    background: var(--accent-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    cursor: pointer;
    pointer-events: all;
    transition: transform 0.3s;
    box-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.location-marker:hover {
    transform: scale(1.2);
}

.controls {
    position: absolute;
    bottom: 20px;
    right: 20px;
    display: flex;
    gap: 10px;
}

.control-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: rgba(0,0,0,0.5);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s;
}

.control-btn:hover {
    background: rgba(0,0,0,0.7);
}

.memory-input {
    background: var(--surface-color);
    padding: 20px;
    border-radius: 12px;
}

.input-group {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

#memoryItem {
    flex: 1;
    padding: 12px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
}

.add-btn {
    padding: 12px 24px;
    background: var(--accent-color);
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s;
}

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

.memory-list {
    margin-top: 20px;
    max-height: 300px;
    overflow-y: auto;
}

.memory-item {
    background: rgba(255,255,255,0.05);
    padding: 12px;
    margin-bottom: 8px;
    border-radius: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.memory-item-text {
    flex: 1;
}

.memory-item-location {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.delete-btn {
    background: none;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 4px 8px;
}

.practice-mode {
    background: var(--surface-color);
    padding: 40px;
    border-radius: 12px;
    margin-bottom: 40px;
}

.practice-container {
    text-align: center;
}

.practice-btn {
    padding: 16px 32px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
}

.practice-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px rgba(147,51,234,0.3);
}

.practice-area {
    margin-top: 30px;
}

.practice-prompt {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent-color);
}

#practiceAnswer {
    padding: 12px 24px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    color: white;
    font-size: 1.1rem;
    margin-right: 10px;
}

.check-btn {
    padding: 12px 24px;
    background: var(--success-color);
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

.feedback {
    margin-top: 20px;
    font-size: 1.1rem;
    min-height: 30px;
}

.feedback.correct {
    color: var(--success-color);
}

.feedback.incorrect {
    color: var(--error-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: rgba(255,255,255,0.1);
    border-radius: 4px;
    margin-top: 30px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transition: width 0.3s;
}

.stats-section {
    margin-bottom: 40px;
}

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

.stat-card {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 12px;
    text-align: center;
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.stat-label {
    color: var(--text-secondary);
}

.tips-section {
    margin-bottom: 60px;
}

.tips-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.tip-card {
    background: var(--surface-color);
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid var(--accent-color);
}

.tip-card h3 {
    color: var(--accent-color);
    margin-bottom: 10px;
}

footer {
    text-align: center;
    padding: 40px 0;
    color: var(--text-secondary);
    border-top: 1px solid rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
    .builder-container {
        grid-template-columns: 1fr;
    }
    
    .room-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
}