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

body {
    font-family: Arial, sans-serif;
    background: linear-gradient(135deg, #eef2f7, #dfe9f3);
    color: #222;
}

/* HEADER */
.site-header {
    background: linear-gradient(135deg, #0f9b8e, #1a7f64, #0b6bcb);
    padding: 60px 20px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.18);
}

.site-header h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 2px 4px 10px rgba(0, 0, 0, 0.25);
}

.sub-title {
    font-size: 1rem;
    opacity: 0.95;
    margin-bottom: 0;
}

/* NAVBAR */
.custom-navbar {
    background: linear-gradient(90deg, #ff9a3d, #ff5f6d);
    box-shadow: 0 5px 18px rgba(0, 0, 0, 0.15);
}

.custom-navbar .nav-link,
.custom-navbar .navbar-brand {
    color: white !important;
}

.custom-navbar .nav-link {
    position: relative;
    margin-left: 10px;
    transition: 0.3s;
    font-weight: 500;
}

.custom-navbar .nav-link:hover {
    transform: translateY(-2px);
    color: #fff !important;
}

.custom-navbar .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -4px;
    width: 0%;
    height: 2px;
    background: #fff;
    transition: 0.3s;
}

.custom-navbar .nav-link:hover::after {
    width: 100%;
}

/* CARD SẢN PHẨM */
.product-card {
    border: none;
    border-radius: 22px;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.10);
    transition: transform 0.45s ease, box-shadow 0.45s ease;
    transform-style: preserve-3d;
    perspective: 1000px;
}

.product-card:hover {
    transform: translateY(-12px) rotateX(4deg) rotateY(-4deg) scale(1.02);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.20);
}

.img-box {
    position: relative;
    overflow: hidden;
}

.product-card img {
    height: 220px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover img {
    transform: scale(1.08);
}

.product-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    color: white;
    padding: 6px 12px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: bold;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.18);
}

.product-badge.sale {
    background: linear-gradient(45deg, #ff512f, #dd2476);
}

.product-card .card-body {
    padding: 20px;
}

.product-card .card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.product-card .card-text {
    color: #666;
    margin-bottom: 12px;
}

.price {
    font-size: 1.3rem;
    font-weight: bold;
    color: #0d6efd;
    margin-bottom: 15px;
}

/* NÚT */
.custom-btn {
    background: linear-gradient(45deg, #00c6ff, #0072ff);
    border: none;
    color: white;
    padding: 12px 18px;
    border-radius: 12px;
    font-weight: 600;
    transition: all 0.35s ease;
    box-shadow: 0 8px 20px rgba(0, 114, 255, 0.28);
}

.custom-btn:hover {
    transform: translateY(-3px) scale(1.03);
    color: white;
    box-shadow: 0 12px 24px rgba(0, 114, 255, 0.35);
}

/* SIDEBAR */
.sidebar-box {
    background: rgba(255, 255, 255, 0.22);
    backdrop-filter: blur(12px);
    border-radius: 22px;
    padding: 28px 22px;
    box-shadow: 0 10px 28px rgba(0, 0, 0, 0.14);
    color: #222;
    border: 1px solid rgba(255, 255, 255, 0.35);
}

.sidebar-box h4 {
    font-weight: 700;
    margin-bottom: 10px;
    color: #0d3b66;
}

.social-links li {
    margin-bottom: 12px;
}

.social-links a {
    display: block;
    text-decoration: none;
    color: #333;
    background: white;
    padding: 12px 14px;
    border-radius: 12px;
    transition: 0.3s;
    box-shadow: 0 5px 14px rgba(0, 0, 0, 0.08);
}

.social-links a:hover {
    transform: translateX(6px);
    background: linear-gradient(45deg, #6a11cb, #2575fc);
    color: white;
}

/* FOOTER */
.site-footer {
    margin-top: 40px;
    padding: 20px 0;
    background: #0f172a;
    color: #fff;
    box-shadow: 0 -3px 10px rgba(0, 0, 0, 0.08);
}

/* RESPONSIVE */
@media (max-width: 992px) {
    .sidebar-box {
        margin-top: 20px;
    }
}

@media (max-width: 768px) {
    .site-header h1 {
        font-size: 2.2rem;
    }

    .product-card img {
        height: 200px;
    }
}

@media (max-width: 576px) {
    .site-header {
        padding: 40px 15px;
    }

    .site-header h1 {
        font-size: 1.8rem;
    }

    .sub-title {
        font-size: 0.9rem;
    }
}
/* Khu vực slider */
.crazy-slider-section {
    min-height: 700px;
    background: 
        radial-gradient(circle at 20% 20%, rgba(56, 189, 248, 0.35), transparent 30%),
        radial-gradient(circle at 80% 30%, rgba(236, 72, 153, 0.35), transparent 30%),
        radial-gradient(circle at 50% 90%, rgba(34, 197, 94, 0.25), transparent 30%),
        linear-gradient(135deg, #020617, #111827, #1e1b4b);
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    padding: 80px 20px;
    position: relative;
}

/* Các đốm sáng nền */
.crazy-slider-section::before,
.crazy-slider-section::after {
    content: "";
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    filter: blur(20px);
    opacity: 0.6;
    animation: floatingLight 6s ease-in-out infinite alternate;
}

.crazy-slider-section::before {
    background: #38bdf8;
    top: 80px;
    left: 120px;
}

.crazy-slider-section::after {
    background: #ec4899;
    bottom: 80px;
    right: 120px;
    animation-delay: 1.5s;
}

/* Khung kính glass */
.glass-panel {
    width: 90%;
    max-width: 1100px;
    min-height: 560px;
    padding: 50px 30px 90px;
    border-radius: 35px;

    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);

    border: 1px solid rgba(255, 255, 255, 0.28);
    box-shadow: 
        0 25px 60px rgba(0, 0, 0, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.35),
        inset 0 -1px 0 rgba(255, 255, 255, 0.1);

    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    z-index: 2;
}

/* Viền sáng chạy nhẹ */
.glass-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    border-radius: 35px;
    padding: 2px;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.8),
        rgba(56, 189, 248, 0.2),
        rgba(236, 72, 153, 0.5)
    );

    -webkit-mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);

    mask:
        linear-gradient(#fff 0 0) content-box,
        linear-gradient(#fff 0 0);

    -webkit-mask-composite: xor;
    mask-composite: exclude;

    pointer-events: none;
}

/* Tiêu đề */
.crazy-slider-section h2 {
    color: white;
    font-size: 42px;
    margin-bottom: 80px;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-align: center;
    text-shadow: 
        0 0 15px #38bdf8,
        0 0 30px #38bdf8,
        0 0 50px rgba(236, 72, 153, 0.8);
}

/* Khung chứa 3D */
.slider-wrapper {
    width: 260px;
    height: 180px;
    position: relative;
    perspective: 1200px;
}

/* Vòng xoay 3D */
.slider-3d {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    animation: crazyRotate 18s linear infinite;
}

/* Dừng xoay khi rê chuột */
.slider-wrapper:hover .slider-3d {
    animation-play-state: paused;
}

/* Từng ảnh dạng glass card */
.slider-3d span {
    position: absolute;
    width: 260px;
    height: 180px;
    left: 0;
    top: 0;
    border-radius: 22px;
    overflow: hidden;

    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);

    border: 1px solid rgba(255, 255, 255, 0.35);

    box-shadow: 
        0 20px 45px rgba(0, 0, 0, 0.65),
        0 0 25px rgba(56, 189, 248, 0.45),
        inset 0 1px 0 rgba(255, 255, 255, 0.45);

    -webkit-box-reflect: below 15px linear-gradient(
        transparent,
        rgba(255, 255, 255, 0.18)
    );
}

/* Lớp phủ kính trên ảnh */
.slider-3d span::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(
        135deg,
        rgba(255, 255, 255, 0.32),
        transparent 35%,
        rgba(255, 255, 255, 0.08)
    );
    pointer-events: none;
}

.slider-3d span img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease, filter 0.5s ease;
}

/* Hover ảnh */
.slider-3d span:hover img {
    transform: scale(1.15);
    filter: brightness(1.15) contrast(1.1);
}

/* Chia các ảnh thành vòng tròn 3D */
.slider-3d span:nth-child(1) {
    transform: rotateY(0deg) translateZ(420px);
}

.slider-3d span:nth-child(2) {
    transform: rotateY(45deg) translateZ(420px);
}

.slider-3d span:nth-child(3) {
    transform: rotateY(90deg) translateZ(420px);
}

.slider-3d span:nth-child(4) {
    transform: rotateY(135deg) translateZ(420px);
}

.slider-3d span:nth-child(5) {
    transform: rotateY(180deg) translateZ(420px);
}

.slider-3d span:nth-child(6) {
    transform: rotateY(225deg) translateZ(420px);
}

.slider-3d span:nth-child(7) {
    transform: rotateY(270deg) translateZ(420px);
}

.slider-3d span:nth-child(8) {
    transform: rotateY(315deg) translateZ(420px);
}

/* Animation xoay 3D */
@keyframes crazyRotate {
    0% {
        transform: rotateX(-10deg) rotateY(0deg);
    }

    25% {
        transform: rotateX(8deg) rotateY(90deg);
    }

    50% {
        transform: rotateX(-12deg) rotateY(180deg);
    }

    75% {
        transform: rotateX(8deg) rotateY(270deg);
    }

    100% {
        transform: rotateX(-10deg) rotateY(360deg);
    }
}

/* Animation đốm sáng nền */
@keyframes floatingLight {
    from {
        transform: translateY(0) scale(1);
    }

    to {
        transform: translateY(-35px) scale(1.12);
    }
}

/* Responsive */
@media (max-width: 768px) {
    .crazy-slider-section {
        min-height: 600px;
        padding: 50px 15px;
    }

    .glass-panel {
        width: 100%;
        min-height: 500px;
        padding: 40px 20px 70px;
    }

    .crazy-slider-section h2 {
        font-size: 26px;
        margin-bottom: 60px;
    }

    .slider-wrapper {
        width: 200px;
        height: 140px;
        perspective: 900px;
    }

    .slider-3d span {
        width: 200px;
        height: 140px;
    }

    .slider-3d span:nth-child(1) {
        transform: rotateY(0deg) translateZ(300px);
    }

    .slider-3d span:nth-child(2) {
        transform: rotateY(45deg) translateZ(300px);
    }

    .slider-3d span:nth-child(3) {
        transform: rotateY(90deg) translateZ(300px);
    }

    .slider-3d span:nth-child(4) {
        transform: rotateY(135deg) translateZ(300px);
    }

    .slider-3d span:nth-child(5) {
        transform: rotateY(180deg) translateZ(300px);
    }

    .slider-3d span:nth-child(6) {
        transform: rotateY(225deg) translateZ(300px);
    }

    .slider-3d span:nth-child(7) {
        transform: rotateY(270deg) translateZ(300px);
    }

    .slider-3d span:nth-child(8) {
        transform: rotateY(315deg) translateZ(300px);
    }
}