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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: #f5f5f5;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    max-width: 600px;
    width: 100%;
    padding: 20px;
}

.header {
    text-align: center;
    margin-bottom: 40px;
}

.header h1 {
    font-size: 2rem;
    color: #2c3e50;
    margin-bottom: 10px;
}

.header p {
    color: #7f8c8d;
    font-size: 1.1rem;
}

.auth-section {
    text-align: center;
    margin-bottom: 30px;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-logout {
    background: #e74c3c;
    color: white;
}

.btn-logout:hover {
    background: #c0392b;
}

.user-info {
    background: white;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    display: none;
}

.user-info.show {
    display: block;
}

.user-info h2 {
    color: #2c3e50;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.info-row {
    padding: 10px 0;
    border-bottom: 1px solid #ecf0f1;
}

.info-row:last-child {
    border-bottom: none;
}

.info-row strong {
    color: #34495e;
    display: inline-block;
    width: 100px;
}

.info-row span {
    color: #7f8c8d;
}

.user-picture {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 10px;
    display: block;
}

.score-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 2px solid #ecf0f1;
}

.score-section h3 {
    color: #2c3e50;
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.score-input-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.score-input-group input {
    flex: 1;
    padding: 10px;
    font-size: 16px;
    border: 2px solid #ecf0f1;
    border-radius: 4px;
    transition: border-color 0.3s ease;
}

.score-input-group input:focus {
    outline: none;
    border-color: #3498db;
}