* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: "Poppins", sans-serif;
    background: linear-gradient(to right, #d3d3d3, #bdbdbd);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
}

.login-container {
    background-color: #fff;
    padding: 40px 30px;
    border-radius: 16px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    animation: fadeIn 0.6s ease-in-out;
    text-align: center;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo {
    width: 80px;
    margin-bottom: 10px;
}

.system-title {
    font-size: 20px;
    font-weight: 600;
    color: #4a4a4a;
    margin-bottom: 30px;
}

.form-group {
    position: relative;
    margin-bottom: 24px;
    text-align: left;
}

.form-group input {
    width: 100%;
    padding: 14px 12px;
    border: 1px solid #ccc;
    border-radius: 8px;
    font-size: 15px;
    transition: border 0.3s;
}

.form-group input:focus {
    border-color: #667eea;
    outline: none;
}

.form-group label {
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    background: white;
    padding: 0 4px;
    color: #888;
    font-size: 14px;
    pointer-events: none;
    transition: 0.3s;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label {
    top: -8px;
    font-size: 12px;
    color: #667eea;
}

.toggle-password {
    position: absolute;
    top: 50%;
    right: 14px;
    transform: translateY(-50%);
    cursor: pointer;
    color: #aaa;
}

.error-message {
    color: red;
    font-size: 13px;
    margin-top: 5px;
}

.login-btn {
    width: 100%;
    background: #667eea;
    color: white;
    border: none;
    padding: 14px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.login-btn:hover {
    background: #5a67d8;
}

.footer-text {
    margin-top: 20px;
    font-size: 14px;
}

.footer-text a {
    color: #667eea;
    text-decoration: none;
    font-weight: 500;
}

.footer-text a:hover {
    text-decoration: underline;
}

@media screen and (max-width: 500px) {
    .login-container {
        padding: 30px 20px;
    }
}