body {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.auth-box {
    background: white;
    padding: 40px 30px;
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    text-align: center;
}

.logo { 
    font-size: 50px; 
    margin-bottom: 10px; 
}

h1 { 
    margin: 0 0 10px 0; 
    color: #333; 
    font-size: 24px; 
}

.subtitle { 
    color: #777; 
    margin-bottom: 30px; 
    font-size: 14px; 
}

form { 
    display: flex; 
    flex-direction: column; 
    gap: 15px; 
}

input {
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

input:focus { 
    border-color: #667eea; 
}

button {
    padding: 15px;
    background: #667eea;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.3s;
    margin-top: 10px;
}

button:hover { 
    background: #5568d3; 
}

.switch-link { 
    margin-top: 20px; 
    color: #666; 
    font-size: 14px; 
}

.switch-link a { 
    color: #667eea; 
    text-decoration: none; 
    font-weight: bold; 
}