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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: #333;
}

.screen {
    display: none;
    width: 100%;
    max-width: 600px;
    padding: 20px;
}

.screen.active {
    display: block;
}

.title-content {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    text-align: center;
}

h1 {
    font-size: 3em;
    color: #667eea;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2em;
    color: #666;
    margin-bottom: 40px;
}

.button-group {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.btn {
    padding: 15px 30px;
    font-size: 1.1em;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #4CAF50;
    color: white;
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.photo-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 30px;
    min-height: 100px;
}

.photo-item {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid #667eea;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.photo-item.empty {
    border: 3px dashed #ccc;
    background: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 0.8em;
}

.game-header {
    background: white;
    border-radius: 15px 15px 0 0;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.btn-back {
    background: #f5f5f5;
    border: none;
    padding: 8px 15px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9em;
    color: #666;
    transition: all 0.3s ease;
}

.btn-back:hover {
    background: #e0e0e0;
}

.btn-shake {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.9em;
    font-weight: 600;
    color: white;
    transition: all 0.3s ease;
    box-shadow: 0 2px 8px rgba(245, 87, 108, 0.3);
}

.btn-shake:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(245, 87, 108, 0.4);
}

.btn-shake:active:not(:disabled) {
    transform: translateY(0);
}

.btn-shake:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.score-container {
    text-align: right;
}

.score-label {
    font-size: 0.8em;
    color: #666;
    margin-bottom: 5px;
}

.score-value {
    font-size: 1.5em;
    font-weight: 700;
    color: #667eea;
}

#gameCanvas {
    display: block;
    width: 100%;
    background: white;
    border-left: 1px solid #ddd;
    border-right: 1px solid #ddd;
    cursor: pointer;
}

.game-description {
    background: #f8f9fa;
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 30px;
    color: #666;
    font-size: 0.95em;
    line-height: 1.6;
}

.game-description p {
    margin: 0;
}

.game-footer {
    background: white;
    border-radius: 0 0 15px 15px;
    padding: 15px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}