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

body {
    font-family: Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center; /* pastikan benar-benar di tengah vertikal */
    background: url('https://images.unsplash.com/photo-1504384308090-c894fdcc538d?auto=format&fit=crop&w=1600&q=80')
                no-repeat center center/cover;
    position: relative;
    overflow: hidden;
    padding: 20px; /* biar ada sedikit ruang di layar kecil */
}

body::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    background: rgba(0,0,0,0.4);
    backdrop-filter: blur(5px);
    z-index: 0;
}

.login-box {
    position: relative;
    z-index: 1;
    background: rgba(255,255,255,0.9);
    padding: 40px 30px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
    width: 380px;
    max-width: 90%;
    text-align: center;
    animation: fadeIn 0.6s ease-in-out;
}

/* Hapus aturan berikut karena membuat konten bergeser ke atas
@media (max-height: 700px) {
    body {
        align-items: flex-start;
        padding-top: 40px;
    }
}
*/

.login-box h2 {
    margin-bottom: 10px;
    color: #333;
}

.login-box p {
    margin-bottom: 20px;
    color: #666;
    font-size: 14px;
}

.login-box form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.login-box input[type="text"],
.login-box input[type="password"] {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    transition: all 0.3s;
}

.login-box input:focus {
    border-color: #007bff;
    outline: none;
    box-shadow: 0 0 6px rgba(0,123,255,0.4);
}

/* PASSWORD TOGGLE */
.password-container {
    position: relative;
    width: 100%;
}

.password-container input {
    padding-right: 40px;
}

.password-container i {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: #777;
    font-size: 18px;
    transition: color 0.2s ease;
}

.password-container i:hover {
    color: #000;
}

/* BUTTON & LINKS */
.btn-primary {
    background: #007bff;
    color: #fff;
    padding: 12px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.3s, transform 0.1s;
    width: 100%;
}

.btn-primary:hover {
    background: #0056b3;
}

.btn-primary:active {
    transform: scale(0.97);
}

.register-link,
.home-link {
    display: block;
    margin-top: 15px;
    font-size: 14px;
    text-decoration: none;
}

.register-link { 
    color: #28a745; 
    font-weight: bold; 
}

.home-link { 
    color: #007bff; 
}

.register-link:hover,
.home-link:hover {
    text-decoration: underline;
}

.error {
    color: red;
    margin-bottom: 15px;
    font-size: 14px;
    text-align: left;
}

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

/* RESPONSIVE */
@media (max-width: 900px) {
    .login-box {
        width: 75%;
        padding: 35px 25px;
    }
}

@media (max-width: 600px) {
    .login-box {
        width: 90%;
        padding: 25px 20px;
        margin: auto;
    }
}