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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-box {
    background: #fff;
    padding: 40px 32px;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.25);
    width: 100%;
    max-width: 380px;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 24px;
    color: #1e3c72;
    font-size: 24px;
}

.login-box label {
    display: block;
    margin-bottom: 6px;
    font-size: 14px;
    color: #444;
    font-weight: 500;
}

.login-box input[type="text"],
.login-box input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    margin-bottom: 18px;
    border: 1px solid #ccd0d5;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s;
}

.login-box input[type="text"]:focus,
.login-box input[type="password"]:focus {
    outline: none;
    border-color: #2a5298;
}

.login-box button {
    width: 100%;
    padding: 12px;
    background: #2a5298;
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.login-box button:hover {
    background: #1e3c72;
}

.error {
    background: #fdecea;
    color: #b71c1c;
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 18px;
    font-size: 14px;
    text-align: center;
}