/* =========================
   GOOGLE FONT
========================= */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800;900&display=swap');

/* =========================
   ROOT COLOR
========================= */
:root{
    --primary:#d4af37;
    --primary-light:#f7e7a1;
    --primary-dark:#b8860b;

    --black:#050505;
    --dark:#111111;
    --dark-card:#1a1a1a;

    --white:#ffffff;
    --text:#d9d9d9;

    --gold-gradient:linear-gradient(
        135deg,
        #fff2b2 0%,
        #f7e7a1 15%,
        #d4af37 40%,
        #b8860b 70%,
        #fff2b2 100%
    );

    --shadow:
        0 10px 30px rgba(212,175,55,.15);

    --shadow-hover:
        0 15px 40px rgba(212,175,55,.35);
}

/* =========================
   RESET
========================= */
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:'Poppins',sans-serif;
    scroll-behavior:smooth;
}

body{
    background:
        radial-gradient(circle at top left,#222 0%,#111 40%,#050505 100%);
    color:var(--white);
    overflow-x:hidden;
}

/* =========================
   HEADER
========================= */
header{
    top:0;
    z-index:999;

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

    padding:20px 8%;

    background:rgba(10,10,10,.92);
    backdrop-filter:blur(15px);

    border-bottom:1px solid rgba(212,175,55,.15);
}

.logo{
    font-size:34px;
    font-weight:800;

    background:var(--gold-gradient);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
}

header nav{
    display:flex;
    gap:25px;
}

header nav a{
    color:#fff;
    text-decoration:none;
    font-weight:500;
    transition:.3s;
    position:relative;
}

header nav a::after{
    content:'';
    position:absolute;
    left:0;
    bottom:-6px;
    width:0%;
    height:2px;
    background:var(--primary);
    transition:.3s;
}

header nav a:hover{
    color:var(--primary);
}

header nav a:hover::after{
    width:100%;
}

/* =========================
   BANNER
========================= */
.banner{
    height:90vh;

    background:
        linear-gradient(rgba(0,0,0,.65),rgba(0,0,0,.65)),
        url("../images/banner.png") center/cover no-repeat;

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

    position:relative;
}

.banner-content{
    max-width:800px;
    padding:20px;
}

.banner-content h1{
    font-size:70px;
    font-weight:900;

    background:var(--gold-gradient);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;

    text-shadow:
        0 0 25px rgba(212,175,55,.25);
}

.banner-content p{
    font-size:20px;
    color:#ddd;
    margin:20px 0 30px;
    line-height:1.8;
}

.btn-banner{
    display:inline-block;

    padding:14px 35px;

    background:var(--gold-gradient);
    color:#111;

    border-radius:50px;
    text-decoration:none;
    font-weight:700;

    box-shadow:var(--shadow);

    transition:.4s;
}

.btn-banner:hover{
    transform:translateY(-5px) scale(1.05);
    box-shadow:var(--shadow-hover);
}

/* =========================
   PRODUCTS
========================= */
.products{
    padding:100px 8%;
    text-align:center;
}

.products h2{
    font-size:42px;
    margin-bottom:50px;

    background:var(--gold-gradient);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
}

.product-grid{
    display:flex;
    flex-wrap:wrap;
    justify-content:center;
    gap:35px;
}

.card{
    background:rgba(255,255,255,.05);
    backdrop-filter:blur(20px);
    border:1px solid rgba(212,175,55,.15);
    border-radius:20px;
    overflow:hidden;
    transition:.4s;

    width:100%;
    max-width:400px; /* giống CSS cũ */
}

.card:hover{
    transform:translateY(-12px);
    box-shadow:var(--shadow-hover);
}

.card img{
    width:100%;
    height:85%;
    object-fit:cover;
    image-rendering:auto;
    backface-visibility:hidden;
    transform:translateZ(0);
}

.card h3{
    font-size:22px;
    margin:20px 0 10px;
}

.card .price{
    font-size:22px;
    font-weight:700;
    color:var(--primary);
    margin-bottom:20px;
}

.card-btn{
    display:flex;
    align-items:center;
    justify-content:center;
    gap:8px;

    width:85%;
    margin:0 auto 25px;

    padding:14px;

    background:var(--gold-gradient);
    color:#111;

    border-radius:50px;
    text-decoration:none;
    font-weight:700;

    transition:.3s;
}

.card-btn:hover{
    transform:scale(1.05);
}

.card-btn img{
    width:18px;
    height:18px;
}

/* =========================
   ABOUT
========================= */
.about{
    padding:100px 8%;
    text-align:center;

    background:
    linear-gradient(
        180deg,
        transparent,
        rgba(212,175,55,.03),
        transparent
    );
}

.about h2{
    font-size:42px;
    margin-bottom:20px;

    background:var(--gold-gradient);
    -webkit-background-clip:text;
    -webkit-text-fill-color:transparent;
}

.about p{
    max-width:900px;
    margin:auto auto 50px;

    color:#d8d8d8;
    font-size:18px;
    line-height:1.9;
}

.about-features{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
    gap:30px;
}

.about-features .box{
    background:rgba(255,255,255,.05);
    backdrop-filter:blur(15px);

    border:1px solid rgba(212,175,55,.15);

    border-radius:20px;
    padding:30px;

    transition:.4s;
}

.about-features .box:hover{
    transform:translateY(-10px);
    box-shadow:var(--shadow-hover);
}

.about-features h3{
    color:var(--primary);
    margin-bottom:15px;
}

/* =========================
   TELEGRAM BUTTON
========================= */
.tele-btn{
    position:fixed;
    right:25px;
    bottom:100px;

    width:65px;
    height:65px;

    z-index:1000;

    animation:float 2s ease-in-out infinite;
}

.tele-btn img{
    width:100%;
    height:100%;
}

.whatsapp-btn{
    position:fixed;
    right:25px;
    bottom:20px;

    width:65px;
    height:65px;

    z-index:1000;

    animation:float 2s ease-in-out infinite;
}

.whatsapp-btn img{
    width:100%;
    height:100%;
}

/* =========================
   FLOAT ANIMATION
========================= */
@keyframes float{
    0%{
        transform:translateY(0);
    }
    50%{
        transform:translateY(-10px);
    }
    100%{
        transform:translateY(0);
    }
}

/* =========================
   FOOTER
========================= */
footer{
    text-align:center;
    padding:30px;

    background:#000;

    border-top:1px solid rgba(212,175,55,.15);

    color:#aaa;
}

/* =========================
   MODAL
========================= */
.modal{
    display:none;

    position:fixed;
    inset:0;

    background:rgba(0,0,0,.75);

    z-index:9999;
}

.modal-content{
    width:400px;
    max-width:90%;

    margin:120px auto;

    background:#151515;

    border:1px solid rgba(212,175,55,.2);

    border-radius:20px;
    padding:30px;

    box-shadow:var(--shadow-hover);
}

.close{
    float:right;
    font-size:30px;
    cursor:pointer;
    color:#fff;
}

.login-form{
    display:flex;
    flex-direction:column;
    margin-top:20px;
}

.login-form label{
    margin-bottom:8px;
    color:#fff;
}

.login-form input{
    padding:12px;

    margin-bottom:20px;

    background:#222;
    color:#fff;

    border:1px solid #333;
    border-radius:12px;
}

.login-form input:focus{
    outline:none;
    border-color:var(--primary);
}

.login-form button{
    padding:14px;

    border:none;
    border-radius:50px;

    background:var(--gold-gradient);
    color:#111;

    font-weight:700;
    cursor:pointer;

    transition:.3s;
}

.login-form button:hover{
    transform:translateY(-3px);
}

/* =========================
   RESPONSIVE
========================= */
@media(max-width:768px){

    .banner-content h1{
        font-size:42px;
    }

    .banner-content p{
        font-size:16px;
    }

    header{
        flex-direction:column;
        gap:15px;
    }

    .card{
        width:100%;
        max-width:350px;
    }

    .products h2,
    .about h2{
        font-size:32px;
    }
}