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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #fff;
    color: #000;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 400px;
}

.login-box {
    border: 1px solid #000;
    padding: 40px;
    background: #fff;
}

h1 {
    font-size: 24px;
    font-weight: 600;
    color: #000;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 14px;
    color: #666;
    margin-bottom: 30px;
}

.error-message {
    padding: 12px;
    background: #fff;
    border: 1px solid #d32f2f;
    color: #d32f2f;
    margin-bottom: 20px;
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #000;
    font-size: 14px;
}

input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 10px;
    border: 1px solid #000;
    background: #fff;
    color: #000;
    font-size: 14px;
}

input:focus {
    outline: none;
    border-color: #000;
    box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.1);
}

.btn-login {
    width: 100%;
    padding: 12px;
    border: 1px solid #000;
    background: #000;
    color: #fff;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.2s;
}

.btn-login:hover {
    background: #333;
}

.login-info {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
    font-size: 12px;
    color: #666;
}

.login-info p {
    margin-bottom: 8px;
}

.login-info code {
    background: #f5f5f5;
    padding: 2px 6px;
    border: 1px solid #e0e0e0;
    font-family: 'Courier New', monospace;
    color: #000;
}

/* Responsive */
@media (max-width: 480px) {
    .login-box {
        padding: 30px 20px;
    }

    h1 {
        font-size: 20px;
    }
}