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

/* ======================
   BODY & BACKGROUND
====================== */
body{
    font-family: 'Poppins', sans-serif;
    min-height: 100vh;
    overflow: hidden;

    background-image: url("../img/perumahan1.png");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}

/* overlay lembut */
body::after{
    content: "";
    position: fixed;
    inset: 0;
    background: rgba(255,255,255,0.35);
    z-index: 1;
}

/* ======================
   CENTER CONTAINER
====================== */
.container-center{
    width: 100vw;
    height: 100vh;

    display: flex;
    justify-content: center;
    align-items: center;

    position: relative;
    z-index: 2;
}

/* ======================
   LOGIN BOARD
====================== */
.login-board{
    width: 360px;

    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);

    padding: 45px 38px;
    border-radius: 24px;

    box-shadow:
        0 30px 60px rgba(0,0,0,0.18),
        inset 0 1px 0 rgba(255,255,255,0.9);

    text-align: center;

    animation: fadeScale 0.6s ease;
}

/* ======================
   LOGO
====================== */
.logo-board{
    width: 135px;
    height: auto;
    margin-bottom: 24px;
}

/* ======================
   TITLE
====================== */
.title{
    font-size: 26px;
    font-weight: 700;
    color: #333;
    margin-bottom: 32px;
}

/* ======================
   BUTTON GLOSSY
====================== */
.btn{
    position: relative;

    display: flex;
    justify-content: center;
    align-items: center;

    width: 100%;
    height: 52px;

    border-radius: 26px;
    text-decoration: none;

    background: linear-gradient(to bottom, #f08080, #d33434);

    box-shadow:
        0 10px 25px rgba(211,52,52,0.35),
        inset 0 2px 3px rgba(255,255,255,0.75),
        inset 0 -3px 5px rgba(0,0,0,0.15);

    color: #fff;
    font-size: 1.2rem;
    font-weight: 600;
    letter-spacing: 1px;

    transition: all 0.25s ease;
}

.btn::before{
    content: "";
    position: absolute;
    top: 5px;
    left: 7px;
    right: 7px;
    height: 45%;

    border-radius: 20px;
    background: linear-gradient(
        to bottom,
        rgba(255,255,255,0.7),
        rgba(255,255,255,0)
    );
}

.btn:hover{
    transform: translateY(-2px);
}

.btn:active{
    transform: scale(0.96);
}

/* ======================
   ANIMATION
====================== */
@keyframes fadeScale{
    from{
        opacity: 0;
        transform: scale(0.92);
    }
    to{
        opacity: 1;
        transform: scale(1);
    }
}

/* ======================
   RESPONSIVE
====================== */
@media (max-width: 480px){
    .login-board{
        width: 90%;
        padding: 38px 28px;
    }

    .logo-board{
        width: 115px;
    }

    .title{
        font-size: 22px;
    }
}