* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, sans-serif;
}

body {
    background: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.login-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.login-box {
    background: #fff;
    padding: 35px 30px;
    border-radius: 12px;
    box-shadow: 0 8px 25px rgba(0,0,0,0.25);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 10px;
    color: #222;
}

.subtitle {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-bottom: 25px;
}

.input-group {
    margin-bottom: 18px;
}

.input-group label {
    display: block;
    margin-bottom: 7px;
    font-size: 14px;
    color: #333;
    font-weight: bold;
}

.input-group input {
    width: 100%;
    padding: 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    outline: none;
    font-size: 14px;
    transition: 0.3s;
}

.input-group input:focus {
    border-color: #2c5364;
    box-shadow: 0 0 5px rgba(44, 83, 100, 0.3);
}

.login-btn {
    width: 100%;
    padding: 12px;
    border: none;
    background: #2c5364;
    color: #fff;
    font-size: 16px;
    border-radius: 8px;
    cursor: pointer;
    transition: 0.3s;
}

.login-btn:hover {
    background: #203a43;
}

.error-message {
    background: #f8d7da;
    color: #842029;
    padding: 10px;
    border-radius: 8px;
    margin-bottom: 15px;
    text-align: center;
    font-size: 14px;
}