/* --- 1. BIẾN & RESET --- */
:root {
    --primary: #111111;
    --secondary: #757575;
    --bg-gray: #f5f5f5;
    --white: #ffffff;
    --font-main: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

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

body {
    font-family: var(--font-main);
    color: var(--primary);
    background-color: var(--white);
    overflow-x: hidden; /* Ẩn thanh cuộn ngang của body */
    text-rendering: optimizeSpeed;
}

/* Tối ưu hóa việc render các section ngoài màn hình */
section, footer {
    content-visibility: auto;
    contain-intrinsic-size: 1px 500px;
}

a { text-decoration: none; color: inherit; cursor: pointer; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; background: none; font-family: inherit; }

/* --- 2. HEADER & NAV --- */
.top-bar {
    background-color: var(--bg-gray);
    text-align: center;
    padding: 8px;
    font-size: 12px;
    font-weight: 500;
}
.top-bar a { text-decoration: underline; font-weight: bold; }

nav {
    position: sticky; top: 0;
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 40px; height: 60px;
    background: var(--white);  z-index: 100;
}

.logo img { width: 160px; height: auto; display: block; }

.nav-links { display: flex; gap: 20px; position: absolute; left: 50%; transform: translateX(-50%); }
.nav-links a { font-weight: 500; font-size: 16px; position: relative; padding-bottom: 5px; }
.nav-links a:hover { border-bottom: 2px solid var(--primary); }

.nav-icons { display: flex; gap: 15px; align-items: center; }
.icon-btn { font-size: 20px; padding: 8px; border-radius: 50%; transition: 0.2s; display: flex; align-items: center; justify-content: center; }
.icon-btn:hover { background-color: #e5e5e5; }

/* --- SEARCH BAR (Nike Style) --- */
.search-wrapper {
    display: flex;
    align-items: center;
    background-color: var(--bg-gray);
    border-radius: 100px;
    padding: 6px 12px;
    width: 180px;
    transition: all 0.3s ease;
    margin-right: 10px;
    position: relative; /* Để căn chỉnh dropdown theo khung này */
}
.search-wrapper:hover { background-color: #e5e5e5; }

/* Khi click vào ô tìm kiếm, thanh này sẽ dài ra giống Nike */
.search-wrapper:focus-within { background-color: #e5e5e5; width: 240px; }

.search-btn { display: flex; align-items: center; justify-content: center; color: var(--primary); }
.search-input {
    border: none; background: transparent; outline: none;
    width: 100%; font-family: inherit; font-size: 16px; font-weight: 500;
    color: var(--primary); margin-left: 8px;
}
.search-input::placeholder { color: var(--secondary); }

/* --- SEARCH DROPDOWN --- */
.search-dropdown {
    position: absolute;
    top: 120%; /* Cách thanh tìm kiếm một chút */
    right: 0;
    width: 280px; /* Rộng hơn thanh tìm kiếm để chứa nhiều chữ */
    background-color: var(--white);
    border-radius: 12px;
    padding: 15px 0;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15); /* Đổ bóng nhẹ */
    opacity: 0; visibility: hidden; /* Ẩn mặc định */
    transform: translateY(-10px);
    transition: all 0.2s ease;
    z-index: 999; /* Đảm bảo hiện trên mọi thứ khác */
}

/* Hiện dropdown khi focus vào ô input */
.search-wrapper:focus-within .search-dropdown {
    opacity: 1; visibility: visible; transform: translateY(0);
}

.search-dropdown h4 { font-size: 13px; color: var(--secondary); margin: 0 20px 10px; font-weight: 600; text-transform: uppercase; }
.search-item { display: block; padding: 8px 20px; font-size: 15px; font-weight: 500; color: var(--primary); transition: 0.2s; }
.search-item:hover { background-color: var(--bg-gray); }

@media (max-width: 900px) {
    /* Trên mobile, không ẩn input hoàn toàn mà để nó thu nhỏ lại */
    .search-wrapper { width: 40px; padding: 6px 8px; overflow: hidden; }
    .search-wrapper:focus-within { width: 200px; background-color: var(--bg-gray); }
    .search-dropdown { width: 220px; right: -50px; }
}

/* --- SEARCH OVERLAY --- */
.search-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.4); /* Màu tối mờ */
    backdrop-filter: blur(4px); /* Hiệu ứng làm mờ nền */
    z-index: 90; /* Thấp hơn nav (100) để thanh nav vẫn sáng */
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    pointer-events: none; /* Không ngăn cản click khi đang ẩn */
}

/* Kích hoạt overlay khi thanh tìm kiếm được focus */
body:has(.search-wrapper:focus-within) .search-overlay {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

/* Khóa cuộn trang khi đang mở tìm kiếm để trải nghiệm mượt hơn */
body:has(.search-wrapper:focus-within) {
    overflow: hidden;
}

/* --- 3. HERO SECTION --- */
.hero { margin-bottom: 60px; position: relative; overflow: hidden; }
.hero-img {
    pointer-events: none;
    width: 100%; height: 95vh;
    object-fit: cover; object-position: center;
    position: relative;
}

.hero-content { text-align: center; padding: 40px 20px; }
.hero-tag { font-weight: 500; margin-bottom: 10px; font-size: 16px; }

.hero-title {
    font-size: 70px; font-weight: 900; text-transform: uppercase;
    line-height: 0.9; margin-bottom: 20px; letter-spacing: -2px;
    font-family: 'Arial Black', sans-serif;
}
.hero-desc { margin-bottom: 30px; font-size: 16px; max-width: 600px; margin: 0 auto 30px auto; }

.btn-group { display: flex; justify-content: center; gap: 10px; }

.btn-nike {
    background-color: var(--primary); color: var(--white);
    padding: 10px 25px; border-radius: 30px;
    font-weight: 500; font-size: 15px; transition: 0.3s;
}
.btn-nike:hover { background-color: #3d3d3d; }
.btn-nike.secondary { background-color: #fff; color: #111; border: 1px solid #ccc; }
.btn-nike.secondary:hover { border-color: #111; }

/* --- 4. TRENDING CAROUSEL --- */
.section-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: 0 40px; margin-bottom: 20px;
}
.section-title { font-size: 24px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; margin: 0; }
.scroll-btns { display: flex; gap: 10px; }
.circle-btn { background-color: #f5f5f5; width: 40px; height: 40px; }

.product-scroll {
    display: flex; gap: 20px; overflow-x: auto;
    padding: 0 40px 40px 40px;
    scrollbar-width: none; /* Firefox */
    cursor: grab; /* Con trỏ hình bàn tay */
}
.product-scroll::-webkit-scrollbar { display: none; /* Chrome/Safari */ }
.product-scroll.active { cursor: grabbing; /* Con trỏ nắm chặt khi kéo */ }

.product-card { min-width: 400px; cursor: pointer; user-select: none; /* Không cho bôi đen text khi kéo */ }

.card-img-wrap {
    width: 100%; height: 400px; background-color: var(--bg-gray);
    margin-bottom: 15px; position: relative;
}
.card-img-wrap img { width: 100%; height: 100%; object-fit: cover; mix-blend-mode: multiply; }

.card-info { display: flex; justify-content: space-between; align-items: flex-start; }
.p-name { font-weight: 500; font-size: 16px; margin-bottom: 5px; }
.p-cat { color: var(--secondary); font-size: 16px; }
.p-price { font-weight: 500; }


.center-text{
    z-index: 2;
    transform: translate(-50%, -50%);
    position: absolute;
    left: 50%;
    top: 50%;
}

/* --- FEATURED TILES --- */
.featured { padding: 0; }
.featured-inner { max-width: none; width: 100%; margin: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 0; padding: 0; }
.featured-card { border-radius: 0; overflow: visible; position: relative; min-height: 600px; background-size: cover; background-position: center; display: flex; align-items: flex-end; }
.featured-card .featured-content { padding: 28px; color: #fff; z-index: 2; }
.featured-card::before{ content: ""; position:absolute; inset:0; background: linear-gradient(180deg, rgba(0,0,0,0.12) 0%, rgba(0,0,0,0.55) 80%); }
.featured-card.left .kicker, .featured-card.right .kickearr{ font-size: 14px; mgin-bottom: 8px; opacity: 0.95; }
.featured-card h3{ margin:0 0 12px 0; font-size: 26px; line-height:1.05; font-weight:700; }
.feature-btn{ display:inline-block; background:#fff; color:#111; padding:10px 18px; border-radius:999px; text-decoration:none; font-weight:600; box-shadow: 0 8px 18px rgba(0,0,0,0.25); }

@media (max-width: 900px){
    .featured-inner{ grid-template-columns: 1fr; padding: 0 20px; }
    .featured-card{ min-height: 320px; }
}
/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    .nav-links { display: none; }
    .hero-title { font-size: 40px; }
    .product-card { min-width: 300px; }
    nav { padding: 0 20px; }
    .section-header, .product-scroll { padding-left: 20px; padding-right: 20px; }
}
.title-text{
    white-space: nowrap;
    font-family: 'Anton', sans-serif;
    font-weight: 900;
    text-transform: uppercase;
    font-size: 60px;
    letter-spacing: -1px;
    color: rgb(255, 255, 255);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}
.second-title-text{
    font-size: 20px;
    font-weight: bold;
    margin-top: 20px;
    margin-bottom: 30px;
    color: rgb(255, 255, 255);
}
.feature-title{font-size: 28px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; margin: 0; }

/* inline Shop-by-Sport under Trending */
.shop-by-sport-inline { padding: 24px 40px 40px 40px; }
.shop-by-sport-inline .sport-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; max-width: 1200px; margin: 0 auto; }
.shop-by-sport-inline .sport-card img { width: 100%; height: 220px; object-fit: cover; border-radius: 6px; display: block; }
.shop-by-sport-inline .sport-caption { margin-top: 10px; text-align: center; font-size: 16px; color: var(--primary); }

@media (max-width: 900px) {
    .shop-by-sport-inline .sport-grid { grid-template-columns: 1fr; }
    .shop-by-sport-inline .sport-card img { height: 180px; }
}