* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}
.login-container {
    background: white;
    border-radius: 10px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    width: 400px;
    padding: 40px;
}
.login-container h2 { text-align: center; color: #333; margin-bottom: 30px; }
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 8px; color: #555; font-weight: 500; }
input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 16px;
}
input:focus { outline: none; border-color: #667eea; }
button {
    width: 100%;
    padding: 12px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
}
button:hover { transform: translateY(-2px); }
.error {
    background: #fee;
    color: #c33;
    padding: 10px;
    border-radius: 5px;
    margin-bottom: 20px;
    text-align: center;
}
.info {
    text-align: center;
    margin-top: 20px;
    color: #888;
    font-size: 14px;
}