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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header Styles */
header {
    text-align: center;
    margin-bottom: 3rem;
    color: white;
}

header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.9;
    font-weight: 300;
}

/* Main Content Layout */
.content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    flex: 1;
}

/* Section Styles */
.villagers-section,
.diagram-section {
    background: white;
    border-radius: 20px;
    padding: 2rem;
    box-shadow: 0 20px 40px rgba(0,0,0,0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255,255,255,0.2);
}

.villagers-section h2,
.diagram-section h2 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: #2d3748;
    font-weight: 600;
}

/* Villagers Grid */
.villagers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.villager-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    background: #f7fafc;
    position: relative;
    overflow: hidden;
}

.villager-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.15);
    background: #edf2f7;
}

.villager-card.selected {
    border-color: #4299e1;
    background: #ebf8ff;
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(66, 153, 225, 0.3);
}

.villager-card.selected::before {
    content: '✓';
    position: absolute;
    top: 10px;
    right: 10px;
    background: #4299e1;
    color: white;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.villager-image {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: 50%;
    margin-bottom: 0.5rem;
    transition: transform 0.3s ease;
}

.villager-card:hover .villager-image {
    transform: scale(1.1);
}

.villager-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: #4a5568;
    text-align: center;
}

/* Selection Indicator */
.selection-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #e2e8f0;
    margin-top: 0.5rem;
    transition: all 0.3s ease;
}

.villager-card.selected .selection-dot {
    background: #4299e1;
    transform: scale(1.2);
}

/* Selection Info */
.selection-info {
    text-align: center;
    font-size: 1.1rem;
    font-weight: 500;
    color: #4a5568;
    padding: 1rem;
    background: #f7fafc;
    border-radius: 10px;
    border: 1px solid #e2e8f0;
}

#selectionCount {
    color: #4299e1;
    font-weight: 700;
}

/* Diagram Container */
.diagram-container {
    width: 100%;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 15px;
    overflow: hidden;
    background: #f7fafc;
    border: 2px dashed #e2e8f0;
    position: relative;
}

.diagram-container.showing-diagram {
    border: none;
    background: white;
}

.diagram-image {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
    transition: all 0.5s ease;
}

/* Placeholder */
.placeholder {
    text-align: center;
    color: #a0aec0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.placeholder p {
    font-size: 1.1rem;
    font-weight: 500;
    max-width: 300px;
    line-height: 1.5;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .villagers-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
        gap: 1rem;
    }
    
    .villager-image {
        width: 60px;
        height: 60px;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .villagers-section,
    .diagram-section {
        padding: 1.5rem;
    }
    
    .diagram-container {
        height: 300px;
    }
}

/* Animation for diagram appearance */
@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.diagram-image {
    animation: fadeInScale 0.5s ease-out;
}

/* Loading animation for villager cards */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.7;
    }
}

.villager-card.loading {
    animation: pulse 1.5s ease-in-out infinite;
}