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

body {
    background: linear-gradient(135deg, #0f172a, #1e3a8a);
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.login-box {
    width: 100%;
    max-width: 400px;
    background: #fff;
    padding: 35px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.logo {
    text-align: center;
    margin-bottom: 25px;
}

.logo h1 {
    font-size: 28px;
    color: #1e3a8a;
    margin-bottom: 5px;
}

.logo p {
    color: #64748b;
    font-size: 14px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: bold;
    color: #334155;
}

.form-control {
    width: 100%;
    padding: 14px;
    border: 1px solid #cbd5e1;
    border-radius: 12px;
    outline: none;
    font-size: 15px;
}

.form-control:focus {
    border-color: #2563eb;
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.btn-login {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 12px;
    background: #2563eb;
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    transition: 0.3s;
}

.btn-login:hover {
    background: #1d4ed8;
}

.alert {
    background: #fee2e2;
    color: #b91c1c;
    padding: 12px;
    border-radius: 10px;
    margin-bottom: 15px;
    font-size: 14px;
}

.footer {
    text-align: center;
    margin-top: 20px;
    font-size: 13px;
    color: #64748b;
}