/* ==========================================================================
   PREMIUM INDUSTRIAL DESIGN
   Giao diện chuẩn doanh nghiệp: Sang trọng, Đẳng cấp, Hiện đại
   ========================================================================== */

:root {
  --primary: #0f172a;       /* Xanh Navy đậm - Sang trọng, tin cậy */
  --accent: #f59e0b;        /* Vàng Gold - Điểm nhấn cao cấp */
  --accent-hover: #d97706;
  --text-main: #334155;     /* Xám than - Dễ đọc */
  --text-light: #64748b;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.01);
  --shadow-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

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

body {
  font-family: 'Inter', sans-serif;
  color: var(--text-main);
  background-color: var(--bg-light);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

/* ==========================================================================
   HEADER
   ========================================================================== */
.header {
  background: var(--white);
  box-shadow: 0 4px 20px rgba(0,0,0,0.03);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  height: 90px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo img {
  height: 60px;
}

.btn-call {
  background: var(--primary);
  color: var(--accent);
  padding: 0.7rem 1.8rem;
  border-radius: 8px;
  font-weight: 700;
  font-size: 1.1rem;
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s ease;
  border: 1px solid var(--primary);
  white-space: nowrap;
}

.btn-call:hover {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, #1e293b 100%);
  color: var(--white);
  padding: 7rem 20px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

/* Thêm hoạ tiết nền nhẹ cho Hero */
.hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -1px;
  line-height: 1.2;
}

.hero-title span {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.25rem;
  font-weight: 400;
  color: #cbd5e1;
  margin-bottom: 2.5rem;
}

/* ==========================================================================
   SERVICES (LĨNH VỰC HOẠT ĐỘNG)
   ========================================================================== */
.section-title {
  text-align: center;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--primary);
  margin: 5rem 0 1rem;
  letter-spacing: -0.5px;
}

.section-subtitle {
  text-align: center;
  color: var(--text-light);
  font-size: 1.15rem;
  margin-bottom: 4rem;
}

.services {
  max-width: 1200px;
  margin: 0 auto 5rem;
  padding: 0 20px;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.card {
  background: var(--white);
  padding: 3rem 2.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  border-top: 4px solid transparent;
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
  border-top: 4px solid var(--accent);
}

.card-icon {
  margin-bottom: 1.5rem;
  width: 70px;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  background: #f1f5f9;
  color: var(--primary);
}

.card-icon svg {
  width: 36px;
  height: 36px;
  fill: currentColor;
}

.card h3 {
  font-size: 1.5rem;
  color: var(--primary);
  margin-bottom: 1rem;
  font-weight: 700;
}

.card p {
  color: var(--text-light);
  margin-bottom: 2rem;
  font-size: 0.95rem;
}

.card-list {
  list-style: none;
  margin-bottom: 2.5rem;
  flex-grow: 1;
}

.card-list li {
  position: relative;
  padding-left: 1.8rem;
  margin-bottom: 1rem;
  color: var(--text-main);
  font-weight: 500;
  font-size: 0.95rem;
}

.card-list li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 800;
  font-size: 1.1rem;
}

.btn-card {
  display: block;
  text-align: center;
  background: #f1f5f9;
  color: var(--primary);
  text-decoration: none;
  padding: 1rem;
  border-radius: 8px;
  font-weight: 700;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.btn-card:hover {
  background: var(--primary);
  color: var(--accent);
  border-color: var(--primary);
}

/* ==========================================================================
   GALLERY SECTION (HÌNH ẢNH HOẠT ĐỘNG)
   ========================================================================== */
.gallery {
  max-width: 1200px;
  margin: 0 auto 5rem;
  padding: 0 20px;
}

.swiper {
  width: 100%;
  padding-bottom: 3rem !important; /* Make room for pagination */
}

.gallery-item {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
  aspect-ratio: 4/3;
  position: relative;
  background: var(--primary);
  /* Ensure Swiper slide behaves correctly */
  height: auto;
}

.gallery-item img,
.gallery-item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  opacity: 0.95;
  display: block;
}

.gallery-item:hover img,
.gallery-item:hover video {
  transform: scale(1.05);
  opacity: 1;
}

/* Customizing Swiper Navigation and Pagination */
.swiper-button-next,
.swiper-button-prev {
  color: var(--accent) !important;
  background: var(--white);
  width: 44px !important;
  height: 44px !important;
  border-radius: 50%;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  top: 40% !important;
}

.swiper-button-next:after,
.swiper-button-prev:after {
  font-size: 1.2rem !important;
  font-weight: bold;
}

.swiper-pagination-bullet {
  background: var(--primary) !important;
  opacity: 0.5 !important;
}

.swiper-pagination-bullet-active {
  background: var(--accent) !important;
  opacity: 1 !important;
  transform: scale(1.2);
}

/* ==========================================================================
   LOCATION & CONTACT SECTION (TRỤ SỞ & BẢN ĐỒ)
   ========================================================================== */
.contact-section {
  max-width: 1200px;
  margin: 0 auto 5rem;
  padding: 0 20px;
}

.location-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  background: var(--white);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.location-info {
  padding: 4rem 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.location-info h3 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 1rem;
}

.location-info p {
  color: var(--text-light);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.contact-details p {
  margin-bottom: 1rem;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
}

.map-container {
  width: 100%;
  height: 100%;
  min-height: 400px;
}

.map-container iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
  background: var(--primary);
  color: var(--white);
  text-align: center;
  padding: 2.5rem 20px;
  font-size: 0.95rem;
}

.footer p {
  opacity: 0.8;
}

/* ==========================================================================
   FLOATING BUTTON (Zalo/Call)
   ========================================================================== */
.floating-btn {
  position: fixed;
  bottom: 2.5rem;
  right: 2.5rem;
  background: #3b82f6; /* Xanh bản đồ */
  color: white;
  padding: 1rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.1rem;
  box-shadow: 0 10px 25px rgba(59, 130, 246, 0.4);
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.floating-btn:hover {
  transform: translateY(-5px) scale(1.05);
  box-shadow: 0 15px 30px rgba(59, 130, 246, 0.5);
  color: white;
}

/* ==========================================================================
   RESPONSIVE (MOBILE & TABLET)
   ========================================================================== */
@media (max-width: 992px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .location-card {
    grid-template-columns: 1fr;
  }
  .map-container {
    min-height: 350px;
  }
}

@media (max-width: 768px) {
  body {
    padding-bottom: 90px;
  }
  .header-content {
    height: 75px;
  }
  .logo img {
    height: 45px;
  }
  .btn-call {
    padding: 0.6rem 1.2rem;
    font-size: 1rem;
  }
  .hero {
    padding: 5rem 20px;
  }
  .hero-title {
    font-size: 2.2rem;
  }
  .grid-3 {
    grid-template-columns: 1fr;
  }
  .section-title {
    font-size: 2rem;
    margin-top: 3rem;
  }
  .card {
    padding: 2rem 1.5rem;
  }
  .floating-btn {
    bottom: 1.5rem;
    right: 1.5rem;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
  }
}

@media (max-width: 480px) {
  .header-content {
    padding: 0 10px;
    height: 65px;
  }
  .logo img {
    height: 32px;
  }
  .btn-call {
    padding: 0.5rem 0.8rem;
    font-size: 0.85rem;
    gap: 4px;
  }
  .btn-call svg, .btn-call i, .btn-call span {
    display: none; /* Nếu có icon bên trong, có thể ẩn đi cho gọn */
  }
  .hero-title {
    font-size: 1.8rem;
  }
}