/* WHATSAPP BUTTON */
.tele-btn {
    position:fixed;
    bottom:100px;
    right:25px;
    width:50px;
    height:50px;
    z-index:200;
    animation: shake 1.5s infinite;
}
.tele-btn img{
    width:100%;
    height:100%;
}
/* shake animation */
@keyframes shake {
    0%,100%{ transform:rotate(0deg); }
    25%{ transform:rotate(15deg); }
    50%{ transform:rotate(-15deg); }
    75%{ transform:rotate(15deg); }
}
* { margin:0; padding:0; box-sizing:border-box; font-family: 'Arial', sans-serif; }
body { background:#fdfaf7; color:#333; }

/* HEADER */
header {
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:20px 8%;
    background:#111;
    color:#fff;
    position:sticky;
    top:0;
    z-index:100;
}
header .logo { font-size:28px; font-weight:bold; color:#ffd700; }
header nav a { color:#fff; text-decoration:none; margin-left:20px; transition:0.3s; }
header nav a:hover { color:#ffd700; }

/* BANNER */
.banner {
    height:70vh;
    background: url("../images/banner.png") center/cover no-repeat;
    display:flex; justify-content:center; align-items:center; text-align:center;
    color:#fff;
    position:relative;
}
.banner::after {
    content:'';
    position:absolute; top:0; left:0; width:100%; height:100%;
    background: no-repeat;
}
.banner-content {
    position:relative;
}
.banner-content h1 { font-size:48px; margin-bottom:10px; }
.banner-content p { font-size:20px; margin-bottom:20px; }
.btn-banner {
    display:inline-block;
    padding:12px 25px;
    background:#ffd700;
    color:#111;
    border-radius:8px;
    text-decoration:none;
    font-weight:bold;
    transition:0.3s;
}
.btn-banner:hover { background:#e6c200; }

/* PRODUCTS */
.products { padding:60px 8%; text-align:center; }
.products h2 { font-size:32px; margin-bottom:30px; color:#111; }
.product-grid {
    display: flex;
    flex-direction: column; /* 1 card 1 hàng */
    gap: 25px;
    align-items: center; /* căn giữa card */
}
.card {
    background: #fff;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: 0.3s;
    width: 100%; /* chiếm toàn bộ chiều ngang container */
    max-width: 400px; /* giới hạn rộng card */
}

.card img {
    width: 100%;
    height: 450px; /* tất cả ảnh bằng nhau */
    object-fit: cover; /* giữ tỷ lệ ảnh và cắt vừa đủ */
    display: block;
}
.card:hover { transform:translateY(-5px); }
.card h3 { font-size:20px; margin:10px 0; color:#111; }
.card .price { color:#ffd700; font-weight:bold; margin-bottom:10px; }
.card-btn {
    display: flex;              /* chuyển sang flex để căn icon và chữ */
    align-items: center;        /* căn giữa theo chiều dọc */
    justify-content: center;    /* căn giữa theo chiều ngang (toàn bộ nút) */
    gap: 5px;                   /* khoảng cách giữa icon và chữ */
    padding:10px;
    background:#ffd700;
    color:#111;
    text-decoration:none;
    border-radius:8px;
    font-weight:bold;
    transition:0.3s;
}
.card-btn:hover { background:#e6c200; }

.card-btn img {
    width:16px;   /* icon nhỏ vừa phải */
    height:16px;
}


/* ABOUT */
.about { background:#fff9f0; padding:60px 8%; text-align:center; }
.about h2 { font-size:32px; margin-bottom:20px; color:#111; }
.about p { font-size:18px; max-width:800px; margin:0 auto 40px; line-height:1.6; }
.about-features { display:grid; grid-template-columns:repeat(auto-fit,minmax(250px,1fr)); gap:20px; }
.about-features .box {
    background:#fff;
    padding:20px;
    border-radius:12px;
    box-shadow:0 5px 15px rgba(0,0,0,0.1);
    transition:0.3s;
}
.about-features .box:hover { transform:translateY(-5px); }
.about-features h3 { color:#ffd700; margin-bottom:10px; }

/* WHATSAPP BUTTON */
.whatsapp-btn {
    position:fixed;
    bottom:20px;
    right:20px;
    width:60px;
    height:60px;
    z-index:200;
    animation: shake 1.5s infinite;
}
.whatsapp-btn img { width:100%; height:100%; }

/* shake animation */
@keyframes shake {
    0%,100%{ transform:rotate(0deg); }
    25%{ transform:rotate(15deg); }
    50%{ transform:rotate(-15deg); }
    75%{ transform:rotate(15deg); }
}

/* FOOTER */
footer { text-align:center; padding:25px 0; background:#111; color:#fff; }

/* MODAL */
.modal {
    display:none;
    position:fixed;
    top:0; left:0;
    width:100%; height:100%;
    background:rgba(0,0,0,0.6);
    z-index:999;
}
.modal-content {
    background:#fff;
    margin:100px auto;
    padding:25px;
    border-radius:12px;
    width:350px;
    box-shadow:0 5px 20px rgba(0,0,0,0.3);
}
.close { float:right; font-size:26px; cursor:pointer; }
.login-form { display:flex; flex-direction:column; margin-top:15px; }
.login-form label { text-align:left; margin-bottom:5px; color:#111; }
.login-form input { padding:10px; margin-bottom:15px; border-radius:8px; border:1px solid #ccc; }
.login-form button {
    padding:10px; background:#ffd700; color:#111; border:none; border-radius:8px; cursor:pointer; font-weight:bold;
}
.login-form button:hover { background:#e6c200; }