*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family: Arial, sans-serif;
}

body{
  background:#fff;
}

/* ================= HEADER ================= */
.header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:15px 40px;
  background:#ff6a00;
}

.logo img{
  width:80px;
}

.nav ul{
  display:flex;
  list-style:none;
  gap:30px;
}

.nav ul li a{
  text-decoration:none;
  color:#fff;
  font-weight:bold;
}

.nav ul li{
  position:relative;
}

/* DROPDOWN */
.dropdown-menu{
  position:absolute;
  top:35px;
  left:0;
  background:#fff;
  display:none;
  flex-direction:column;
  min-width:220px;
  box-shadow:0 5px 15px rgba(0,0,0,0.2);
}

.dropdown-menu li a{
  padding:10px;
  color:#333;
  display:block;
}

.dropdown:hover .dropdown-menu{
  display:flex;
}

/* CONTACT */
.header-contact{
  display:flex;
  gap:10px;
}

.contact-btn{
  width:40px;
  height:40px;
  background:#fff;
  color:#ff6a00;
  border-radius:50%;
  display:flex;
  align-items:center;
  justify-content:center;
  text-decoration:none;
  font-weight:bold;
}

/* ================= BANNER ================= */
.banner img{
  width:100%;
  height:auto;
}

/* ================= ABOUT ================= */
.about{
  padding:50px 20px;
  text-align:center;
}

.about h2{
  color:#ff6a00;
  margin-bottom:20px;
}

.about-content{
  max-width:800px;
  margin:auto;
  line-height:1.8;
}

/* ================= PRODUCTS ================= */
.products{
  padding:50px 20px;
  background:#f9f9f9;
}

.products h2{
  text-align:center;
  margin-bottom:40px;
  color:#ff6a00;
}

.product-list{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:25px;
  max-width:1200px;
  margin:auto;
}

.product{
  background:#fff;
  padding:20px;
  border-radius:10px;
  text-align:center;
  box-shadow:0 5px 15px rgba(0,0,0,0.1);
}

.product img{
  width:100%;
  border-radius:8px;
}

.product h3{
  margin:15px 0 10px;
}

.btn-main{
  display:inline-block;
  margin-top:15px;
  padding:10px 20px;
  background:#ff6a00;
  color:#fff;
  text-decoration:none;
  border-radius:5px;
  font-weight:bold;
}

/* ================= FOOTER ================= */
/* ===== FOOTER ===== */

.main-footer {
    background: linear-gradient(45deg, #ff6600, #ff8c00);
    color: white;
    padding: 40px 20px;
    margin-top: 50px;
}

.footer-container {
    max-width: 1200px;
    margin: auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.footer-logo img {
    width: 70px;
}

.footer-logo h3 {
    font-size: 22px;
    margin: 0;
}

.footer-info {
    font-size: 17px;
    line-height: 1.8;
}

.footer-info p {
    margin: 5px 0;
}

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

  .nav ul{
    flex-direction:column;
    gap:10px;
  }

  .product-list{
    grid-template-columns:1fr;
  }

}

/* BANNER */
.banner {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.slider {
    position: relative;
}

.slide {
    width: 100%;
    display: none;

    border: 8px solid white;   /* 🔥 viền trắng */
    box-sizing: border-box;    /* không làm tràn layout */
}

.slide.active {
    display: block;
}

.slide.active {
    display: block;
}

/* NÚT MŨI TÊN */
.prev, .next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0,0,0,0.5);
    color: white;
    border: none;
    font-size: 30px;
    padding: 10px 15px;
    cursor: pointer;
}

.prev { left: 10px; }
.next { right: 10px; }

.prev:hover, .next:hover {
    background: rgba(0,0,0,0.8);
}

.slide {
    width: 100%;
    display: none;
}

.slide.active {
    display: block;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    height: 50px;
}

.logo-text {
    font-size: 18px;
    font-weight: bold;
    color: white; /* nếu header nền tối */
}

/* ===== HEADER CONTACT BUTTON ===== */

.contact-btn {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    color: white;
    font-size: 18px;
    transition: 0.3s;
}

/* 🟢 Phone + Map màu xanh lá */
.contact-btn.call,
.contact-btn.map {
    background: #28a745;
}

/* 📘 Facebook + Zalo màu xanh nước biển */
.contact-btn.fb,
.contact-btn.zalo {
    background: #007bff;
}

/* Hover sáng hơn chút */
.contact-btn:hover {
    opacity: 0.8;
}

/* ===== ABOUT BOX CHUYÊN NGHIỆP HƠN ===== */

.about {
    padding: 80px 20px;
    background: linear-gradient(to bottom, #fff3e6, #ffffff);
    display: flex;
    justify-content: center;
}

.about-box {
    max-width: 900px;
    width: 100%;
    background: white;
    border-left: 6px solid #ff6600; /* viền cam 1 bên cho sang */
    border-radius: 14px;
    padding: 50px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.08);
    text-align: center;
    transition: 0.3s;
}

.about-box:hover {
    transform: translateY(-5px);
}

/* Tiêu đề lớn hơn */
.about-box h2 {
    font-size: 32px;
    color: #ff6600;
    margin-bottom: 20px;
}

/* Mô tả to hơn */
.about-desc {
    font-size: 18px;
    line-height: 1.8;
    margin-bottom: 25px;

    max-width: 700px;      /* giới hạn chiều ngang */
    margin-left: auto;
    margin-right: auto;

    word-wrap: break-word; /* đảm bảo xuống dòng */
}

/* Danh sách to và rõ hơn */
.about-list {
    list-style: none;
    padding: 0;
}

.about-list li {
    font-size: 18px;
    padding: 10px 0;
    font-weight: 600;
}

/* ===== FLOATING CONTACT ===== */

.floating-contact {
    position: fixed;
    right: 20px;
    top: 75%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 9999;
}

.float-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
    text-decoration: none;
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
    transition: 0.3s;
    animation: pulse 1.5s infinite;
}

/* MÀU */
.float-btn.zalo,
.float-btn.facebook {
    background: #1877f2;
}

.float-btn.phone,
.float-btn.map {
    background: #00b14f;
}

/* Hover phóng to */
.float-btn:hover {
    transform: scale(1.15);
}

/* Hiệu ứng nhấp nháy + giật nhẹ */
@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(0,0,0,0.4); }
    70% { box-shadow: 0 0 0 15px rgba(0,0,0,0); }
    100% { box-shadow: 0 0 0 0 rgba(0,0,0,0); }
}

/* ===== NÚT XEM CHI TIẾT PRO ===== */

.btn-main {
    display: inline-block;
    padding: 12px 25px;
    background: linear-gradient(45deg, #ff6600, #ff8c00);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

/* Hiệu ứng hover */
.btn-main:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 25px rgba(0,0,0,0.3);
}

/* Hiệu ứng ánh sáng quét */
.btn-main::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255,255,255,0.6),
        transparent
    );
    transition: 0.6s;
}

.btn-main:hover::before {
    left: 100%;
}

/* Khi nhấn chuột */
.btn-main:active {
    transform: scale(0.95);
}