/* ═══════════════════════════════════════════════════════════
   QUANG PHÁT — Enterprise Design v3.0 (Sante-inspired)
   ═══════════════════════════════════════════════════════════ */

:root {
  --primary: #0b1f3a;
  --primary-light: #143a66;
  --accent: #00a8e8;
  --accent-light: #e8f7fd;
  --accent-dark: #007bb5;
  --accent-glow: #00d4ff;
  --danger: #e63946;
  --success: #10b981;
  --warning: #f59e0b;
  --surface: #f0f4f8;
  --card: #ffffff;
  --border: #e2e8f0;
  --text-dark: #1a1a2e;
  --text-body: #475569;
  --text-muted: #94a3b8;
  --font: 'Be Vietnam Pro', -apple-system, sans-serif;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 16px 48px rgba(0,0,0,0.1);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-full: 999px;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ─── Reset ─── */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  font-family: var(--font);
  font-size: 15px;
  color: var(--text-body);
  background: var(--surface);
  line-height: 1.7;
  overflow-x: hidden;
}
a { text-decoration:none; color:inherit; transition: all 0.3s var(--ease); }
ul { list-style:none; }
img { max-width:100%; height:auto; display:block; }

/* ─── Container ─── */
.container { max-width:1200px; margin:0 auto; padding:0 24px; }

/* ═══════ HEADER ═══════ */
.site-header {
  background: var(--card);
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display:flex; align-items:center; justify-content:space-between; gap:24px;
}
.logo-area { display:flex; align-items:center; gap:14px; flex-shrink:0; }
.logo-area img { height:56px; object-fit:contain; }
.logo-text { display:flex; flex-direction:column; justify-content:center; }

.header-contact-blocks {
  display:flex; align-items:center; gap:36px; margin-left:auto;
}
.contact-block {
  display:flex; align-items:center; gap:12px;
}
.contact-block .c-icon {
  width:42px; height:42px; border-radius:50%;
  background:var(--surface); color:var(--accent);
  display:flex; align-items:center; justify-content:center;
  font-size:18px; transition:all 0.3s;
}
.contact-block:hover .c-icon { background:var(--accent-light); transform:translateY(-2px); }
.contact-block .c-text { display:flex; flex-direction:column; }
.contact-block .c-text span {
  font-size:11px; color:var(--text-muted); font-weight:700; text-transform:uppercase; margin-bottom:2px; letter-spacing:0.5px;
}
.contact-block .c-text a {
  font-size:15px; font-weight:800; color:var(--text-dark);
}
.contact-block .c-text a:hover { color:var(--accent); }

.header-right { flex-shrink:0; display:flex; align-items:center; gap:16px; }
.btn-header-cta {
  display:flex; align-items:center; gap:12px;
  padding:12px 28px; background:linear-gradient(135deg, var(--accent), var(--accent-dark));
  border-radius:var(--radius-full); color:#fff;
  transition:all 0.3s; box-shadow: 0 4px 15px rgba(0,168,232,0.3);
}
.btn-header-cta:hover { transform:translateY(-3px); box-shadow: 0 8px 25px rgba(0,168,232,0.45); color:#fff; }
.btn-header-cta i { font-size:24px; }
.btn-header-cta .cta-text { display:flex; flex-direction:column; }
.btn-header-cta .cta-label { font-size:10px; font-weight:700; opacity:0.9; text-transform:uppercase; letter-spacing:0.5px; }
.btn-header-cta .cta-number { font-size:17px; font-weight:900; line-height:1.2; letter-spacing:0.5px; }

.mobile-menu-btn {
  display:none; background:none; border:none; color:var(--primary); font-size:28px; cursor:pointer;
}

/* ═══════ NAVIGATION ═══════ */
.main-nav {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky; top:0; z-index:100;
  box-shadow: 0 4px 12px rgba(0,0,0,0.04);
}
.nav-list {
  display:flex; align-items:center; justify-content:center;
  gap:8px; padding:0; margin:0; list-style:none;
}
.nav-item {
  display:inline-flex; align-items:center;
  padding:16px 24px; font-weight:700; font-size:14px;
  color:var(--text-dark); position:relative;
  transition: all 0.3s; text-transform:uppercase; letter-spacing:0.5px;
}
.nav-item:hover, .nav-item.active { color:var(--accent); }
.nav-item::after {
  content:''; position:absolute; bottom:0; left:50%; transform:translateX(-50%);
  width:0; height:3px; background:var(--accent);
  transition:all 0.3s; border-radius:3px 3px 0 0;
}
.nav-item:hover::after, .nav-item.active::after { width:100%; }
.nav-item i { margin-right:8px; font-size:14px; }

/* ═══════ HERO ═══════ */
.hero {
  position: relative;
  width: 100%;
  height: 520px;
  overflow: hidden;
}
.hero-bg {
  position:absolute; top:0; left:0; width:100%; height:100%;
  background-size:cover; background-position:center;
  background-repeat:no-repeat;
}
.hero-overlay {
  position:absolute; top:0; left:0; width:100%; height:100%;
  background: linear-gradient(135deg, rgba(11,31,58,0.8) 0%, rgba(11,31,58,0.4) 100%);
  z-index:1;
}
.hero-content {
  position:relative; z-index:2;
  height:100%; display:flex; flex-direction:column;
  align-items:center; justify-content:center;
  text-align:center; color:#fff; padding:0 24px;
}
.hero-badge {
  display:inline-flex; align-items:center; gap:8px;
  background:rgba(255,255,255,0.12); border:1px solid rgba(255,255,255,0.25);
  padding:8px 24px; border-radius:var(--radius-full);
  font-size:12px; font-weight:700; text-transform:uppercase;
  letter-spacing:1.5px; backdrop-filter:blur(10px);
  margin-bottom:20px;
}
.hero-title {
  font-size:48px; font-weight:900; line-height:1.15;
  text-shadow:0 4px 20px rgba(0,0,0,0.3);
  margin-bottom:16px;
}
.hero-desc {
  font-size:16px; color:rgba(255,255,255,0.85);
  max-width:520px; margin-bottom:28px;
}
.hero-buttons { display:flex; gap:14px; flex-wrap:wrap; justify-content:center; }
.btn-hero-primary {
  padding:16px 36px; background:#fff; color:var(--primary);
  font-weight:700; font-size:14px; border-radius:var(--radius-full);
  text-transform:uppercase; letter-spacing:0.5px;
  transition: all 0.3s; box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}
.btn-hero-primary:hover {
  background:var(--accent); color:#fff;
  transform:translateY(-3px); box-shadow:0 8px 30px rgba(0,168,232,0.4);
}
.btn-hero-outline {
  padding:16px 36px; background:rgba(255,255,255,0.1);
  color:#fff; font-weight:700; font-size:14px;
  border:2px solid rgba(255,255,255,0.4);
  border-radius:var(--radius-full); text-transform:uppercase;
  letter-spacing:0.5px; backdrop-filter:blur(10px);
  transition: all 0.3s;
}
.btn-hero-outline:hover {
  background:rgba(255,255,255,0.2); border-color:rgba(255,255,255,0.7);
}

/* ═══════ CONTACT BAR (floating form) ═══════ */
.contact-bar {
  background: linear-gradient(135deg, var(--accent), #0092cc);
  border-radius: var(--radius);
  padding: 28px 36px;
  margin-top: -40px;
  position:relative; z-index:10;
  box-shadow: 0 8px 32px rgba(0,168,232,0.3);
}
.contact-bar h3 {
  color:#fff; font-size:18px; font-weight:700;
  margin-bottom:16px; text-transform:uppercase; letter-spacing:0.5px;
}
.contact-form {
  display:flex; gap:12px; align-items:center; flex-wrap:wrap;
}
.contact-form input, .contact-form select {
  flex:1; min-width:180px; padding:14px 18px;
  border:none; border-radius:var(--radius-sm);
  font-size:14px; font-family:var(--font);
  outline:none; background:#fff;
}
.contact-form input::placeholder { color:var(--text-muted); }
.btn-submit {
  padding:14px 32px; background:var(--primary);
  color:#fff; font-weight:700; font-size:14px;
  border:none; border-radius:var(--radius-sm);
  cursor:pointer; text-transform:uppercase;
  display:flex; align-items:center; gap:8px;
  transition: all 0.3s; letter-spacing:0.5px;
}
.btn-submit:hover { background:var(--primary-light); transform:translateY(-2px); }

/* ═══════ ABOUT / SLOGAN SECTION ═══════ */
.slogan-section {
  padding: 80px 0 40px;
  text-align:center;
}
.slogan-title {
  font-size:36px; font-weight:800; color:var(--text-dark);
  line-height:1.3; margin-bottom:16px;
}
.slogan-title span { color:var(--accent); }
.slogan-desc {
  font-size:16px; color:var(--text-body);
  max-width:650px; margin:0 auto 32px;
}
.btn-outline {
  display:inline-flex; align-items:center; gap:8px;
  padding:14px 32px; border:2px solid var(--primary);
  color:var(--primary); font-weight:700; font-size:13px;
  border-radius:var(--radius-full); text-transform:uppercase;
  transition: all 0.3s;
}
.btn-outline:hover { background:var(--primary); color:#fff; }

/* ═══════ VALUE CARDS (Sante style) ═══════ */
.value-cards {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:16px; padding:40px 0 60px;
}
.v-card {
  padding:32px 24px; border-radius:var(--radius);
  text-align:left; color:#fff; position:relative;
  min-height:180px; display:flex; flex-direction:column;
  justify-content:flex-end; transition:all 0.3s;
}
.v-card:hover { transform:translateY(-4px); }
.v-card-icon {
  width:48px; height:48px; margin-bottom:16px;
  background:rgba(255,255,255,0.2); border-radius:14px;
  display:flex; align-items:center; justify-content:center;
  font-size:20px;
}
.v-card h4 { font-size:14px; font-weight:700; line-height:1.5; }
.v-card-1 { background: linear-gradient(135deg, #2d6a9f, #4a90c4); }
.v-card-2 { background: linear-gradient(135deg, #3a7c6e, #5ba89a); }
.v-card-3 { background: linear-gradient(135deg, #1a5276, #2980b9); }
.v-card-4 { background: linear-gradient(135deg, #7c8c5e, #a4b47e); }

/* ═══════ SERVICES SECTION ═══════ */
.services-section {
  padding: 60px 0;
  background: var(--card);
}
.section-header {
  text-align:center; margin-bottom:48px;
}
.section-tag {
  display:inline-block; background:var(--accent-light);
  color:var(--accent); padding:6px 18px; border-radius:var(--radius-full);
  font-size:12px; font-weight:700; text-transform:uppercase;
  letter-spacing:1px; margin-bottom:12px;
}
.section-title {
  font-size:32px; font-weight:800; color:var(--text-dark);
  margin-bottom:8px;
}
.section-line {
  width:48px; height:4px; margin:12px auto 0;
  background:linear-gradient(90deg, var(--accent), var(--accent-glow));
  border-radius:2px;
}
.services-split {
  display:flex; gap:0; border-radius:var(--radius); overflow:hidden;
  box-shadow: var(--shadow-lg); min-height:480px;
}
.services-image {
  flex:0 0 50%; background-size:cover; background-position:center;
  position:relative;
}
.services-image-overlay {
  position:absolute; bottom:0; left:0; right:0;
  padding:32px; background:linear-gradient(transparent, rgba(0,0,0,0.7));
  color:#fff;
}
.services-image-overlay h3 { font-size:22px; font-weight:700; margin-bottom:6px; }
.services-image-overlay p { font-size:13px; color:rgba(255,255,255,0.8); }
.services-menu {
  flex:0 0 50%; background:var(--card); padding:24px 0;
}
.srv-item {
  display:flex; align-items:center; gap:14px;
  padding:16px 32px; cursor:pointer; transition: all 0.3s;
  border-left:3px solid transparent;
}
.srv-item:hover, .srv-item.active {
  background:var(--accent-light);
  border-left-color:var(--accent);
}
.srv-item i {
  width:36px; height:36px; border-radius:10px;
  display:flex; align-items:center; justify-content:center;
  background:var(--surface); color:var(--accent); font-size:16px;
  transition: all 0.3s;
}
.srv-item:hover i, .srv-item.active i {
  background:var(--accent); color:#fff;
}
.srv-item span { font-weight:600; font-size:15px; color:var(--text-dark); }

/* ═══════ PROJECTS ═══════ */
.projects-section { padding:60px 0; }
.projects-grid {
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:16px;
}
.proj-card {
  position:relative; border-radius:var(--radius);
  overflow:hidden; aspect-ratio:1; cursor:pointer;
  box-shadow: var(--shadow-sm);
}
.proj-card img {
  width:100%; height:100%; object-fit:cover;
  transition:transform 0.5s;
}
.proj-card:hover img { transform:scale(1.08); }
.proj-caption {
  position:absolute; bottom:0; left:0; right:0;
  padding:20px; color:#fff;
  background:linear-gradient(transparent, rgba(0,0,0,0.75));
  transform:translateY(100%); transition:transform 0.3s;
}
.proj-card:hover .proj-caption { transform:translateY(0); }
.proj-caption h4 { font-size:13px; font-weight:700; text-transform:uppercase; }
.proj-cta {
  border-radius:var(--radius); overflow:hidden;
  background:linear-gradient(135deg, var(--primary), var(--primary-light));
  display:flex; flex-direction:column; align-items:center;
  justify-content:center; padding:32px; text-align:center;
  color:#fff; aspect-ratio:1;
}
.proj-cta h4 { font-size:18px; font-weight:700; margin-bottom:12px; }
.proj-cta p { font-size:13px; color:rgba(255,255,255,0.7); margin-bottom:16px; }
.proj-cta a {
  padding:10px 24px; background:var(--accent); color:#fff;
  border-radius:var(--radius-full); font-size:12px; font-weight:700;
  text-transform:uppercase;
}

/* ═══════ PRODUCTS ═══════ */
.products-section { padding:60px 0; background:var(--card); }
.product-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.product-card {
  background:#fff; border:1px solid var(--border);
  border-radius:var(--radius); overflow:hidden;
  transition: all 0.3s; display:flex; flex-direction:column;
}
.product-card:hover {
  transform:translateY(-6px); box-shadow:var(--shadow-lg);
  border-color:rgba(0,168,232,0.2);
}
.product-card .badge {
  position:absolute; top:12px; left:12px; z-index:2;
  padding:4px 12px; border-radius:6px;
  font-size:11px; font-weight:700; color:#fff;
}
.badge-hot { background:var(--danger); }
.badge-new { background:var(--success); }
.prod-img-wrap {
  height:200px; display:flex; align-items:center;
  justify-content:center; padding:20px;
  border-bottom:1px solid #f5f5f5; position:relative;
}
.prod-img-wrap img { max-height:100%; max-width:100%; object-fit:contain; transition:transform 0.4s; }
.product-card:hover .prod-img-wrap img { transform:scale(1.06); }
.prod-body { padding:20px; flex-grow:1; display:flex; flex-direction:column; }
.prod-body h4 {
  font-size:14px; font-weight:600; color:var(--text-dark);
  line-height:1.5; margin-bottom:10px; height:42px;
  display:-webkit-box; -webkit-line-clamp:2; line-clamp:2;
  -webkit-box-orient:vertical; overflow:hidden;
}
.prod-tags { display:flex; gap:6px; margin-bottom:10px; flex-wrap:wrap; }
.prod-tags span {
  font-size:11px; font-weight:500; background:var(--surface);
  color:var(--text-body); padding:4px 10px; border-radius:6px;
}
.prod-price {
  color:var(--danger); font-size:18px; font-weight:700;
  margin-top:auto; margin-bottom:12px;
}
.btn-detail {
  display:block; text-align:center; padding:12px;
  border:1px solid var(--accent); color:var(--accent);
  border-radius:var(--radius-sm); font-weight:600; font-size:13px;
  transition: all 0.3s;
}
.btn-detail:hover { background:var(--accent); color:#fff; }

/* ═══════ BRANDS ═══════ */
.brands-section {
  padding:40px 0;
}
.brands-inner {
  background:var(--card); padding:40px; border-radius:var(--radius);
  box-shadow:var(--shadow-sm); border:1px solid var(--border);
}
.brand-row {
  display:flex; align-items:center; justify-content:center;
  flex-wrap:wrap; gap:30px;
}
.brand-item {
  font-size:20px; font-weight:800; font-style:italic;
  opacity:0.35; filter:grayscale(100%);
  transition:all 0.3s; cursor:pointer;
}
.brand-item:hover { opacity:1; filter:grayscale(0%); transform:scale(1.1); }

/* ═══════ CONTACT SECTION ═══════ */
.cta-section {
  padding:60px 0; background:linear-gradient(135deg, #0a192f, #112240);
}
.cta-grid {
  display:grid; grid-template-columns:1fr 1fr; gap:24px; align-items:stretch;
}
.cta-info {
  padding:40px; background:rgba(15,34,57,0.85);
  backdrop-filter:blur(16px); border:1px solid rgba(255,255,255,0.08);
  border-radius:var(--radius); color:#d1d5db;
}
.cta-info h3 {
  color:#fff; font-size:22px; font-weight:700;
  margin-bottom:28px; padding-bottom:12px;
  border-bottom:1px solid rgba(255,255,255,0.1);
}
.cta-row {
  display:flex; align-items:flex-start; gap:16px; margin-bottom:24px;
}
.cta-icon {
  min-width:44px; min-height:44px;
  background:linear-gradient(135deg, rgba(0,210,255,0.15), rgba(0,210,255,0.05));
  border:1px solid rgba(0,210,255,0.2); border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  color:var(--accent-glow); font-size:18px;
}
.cta-row h5 { color:#fff; font-size:15px; font-weight:600; margin-bottom:4px; }
.cta-row p, .cta-row a { font-size:15px; color:#b0bac9; }
.cta-row a.phone { font-size:20px; font-weight:700; color:var(--accent-glow); }
.btn-cta-full {
  display:flex; align-items:center; justify-content:center;
  width:100%; padding:16px;
  background:linear-gradient(90deg, var(--accent-glow), var(--accent));
  color:#fff; font-size:16px; font-weight:700;
  border-radius:var(--radius-sm); border:none;
  text-transform:uppercase; margin-top:auto;
  transition:all 0.3s; cursor:pointer;
}
.btn-cta-full:hover { box-shadow:0 8px 25px rgba(0,162,232,0.5); transform:translateY(-2px); }
.cta-map {
  border-radius:var(--radius); overflow:hidden;
  border:1px solid rgba(0,210,255,0.3);
  box-shadow:0 0 30px rgba(0,210,255,0.1);
}
.cta-map iframe { width:100%; height:100%; min-height:420px; border:0; }

/* ═══════ FOOTER ═══════ */
.site-footer {
  background:var(--primary); color:rgba(255,255,255,0.7);
  padding:48px 0 20px;
}
.footer-grid {
  display:grid; grid-template-columns:1.5fr 1fr 1fr 1.2fr;
  gap:32px; margin-bottom:32px;
}
.footer-col h4 {
  color:#fff; font-size:15px; font-weight:700;
  margin-bottom:16px; text-transform:uppercase; letter-spacing:0.5px;
}
.footer-col p, .footer-col li, .footer-col a {
  font-size:13px; color:rgba(255,255,255,0.6); line-height:1.8;
}
.footer-col a:hover { color:var(--accent-glow); }
.footer-col li { margin-bottom:6px; }
.footer-col li i { color:var(--accent); margin-right:8px; width:16px; }
.footer-bottom {
  border-top:1px solid rgba(255,255,255,0.08);
  padding-top:20px; text-align:center;
  font-size:13px; color:rgba(255,255,255,0.4);
}

/* ═══════ FLOATING BUTTONS ═══════ */
.float-buttons {
  position:fixed; bottom:24px; right:24px;
  display:flex; flex-direction:column; gap:10px; z-index:999;
}
.float-btn {
  width:52px; height:52px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  font-size:22px; color:#fff; box-shadow:0 4px 15px rgba(0,0,0,0.2);
  transition:all 0.3s; cursor:pointer;
}
.float-btn:hover { transform:scale(1.1); }
.float-phone { background:var(--accent); }
.float-zalo { background:#0068ff; }
.float-top { background:var(--primary); font-size:18px; }

/* ═══════ PAGINATION ═══════ */
.pagination { display:flex; justify-content:center; gap:6px; padding:32px 0; }
.page-num {
  width:40px; height:40px; border-radius:var(--radius-sm);
  background:var(--card); color:var(--text-body);
  display:flex; justify-content:center; align-items:center;
  font-size:14px; font-weight:600; border:1px solid var(--border);
  transition: all 0.3s;
}
.page-num.active { background:var(--primary); color:#fff; border-color:var(--primary); }
.page-num:hover:not(.active):not(.ellipsis) { background:var(--accent); color:#fff; border-color:var(--accent); }
.page-num.ellipsis { background:transparent; border:none; pointer-events:none; color:var(--text-muted); }

/* ═══════ RESPONSIVE — Tablet ═══════ */
@media (max-width:1024px) {
  .value-cards { grid-template-columns:repeat(2,1fr); }
  .product-grid { grid-template-columns:repeat(2,1fr); }
  .projects-grid { grid-template-columns:repeat(2,1fr); }
  .footer-grid { grid-template-columns:repeat(2,1fr); }
  .services-split { flex-direction:column; }
  .services-image { min-height:300px; }
}

/* ═══════ RESPONSIVE — Mobile ═══════ */
@media (max-width:768px) {
  .header-contact-blocks { display:none; }
  .btn-header-cta { display:none; }
  .mobile-menu-btn { display:block; }
  
  .main-nav {
    position:fixed; top:89px; left:0; width:100%; height:0;
    overflow:hidden; box-shadow:0 10px 20px rgba(0,0,0,0.1);
    transition:height 0.3s var(--ease);
  }
  .main-nav.active { height:calc(100vh - 89px); overflow-y:auto; }
  .nav-list { flex-direction:column; align-items:flex-start; padding:16px 24px; }
  .nav-item { padding:16px 0; border-bottom:1px solid var(--border); width:100%; }
  
  .hero { height:400px; }
  .hero-title { font-size:28px !important; }
  .hero-desc { font-size:14px; }
  .contact-bar { margin-top:-20px; padding:20px; }
  .contact-form { flex-direction:column; }
  .contact-form input, .contact-form select { min-width:100%; }
  .slogan-title { font-size:26px; }
  .value-cards { grid-template-columns:1fr; gap:12px; }
  .cta-grid { grid-template-columns:1fr; }
  .product-grid { grid-template-columns:1fr 1fr; }
  .projects-grid { grid-template-columns:1fr 1fr; }
  .section-title { font-size:24px; }
  .footer-grid { grid-template-columns:1fr; }
}

@media (max-width:480px) {
  .hero { height:350px; }
  .hero-title { font-size:22px !important; }
  .hero-badge { font-size:10px; padding:6px 14px; }
  .hero-buttons { flex-direction:column; width:100%; padding:0 20px; }
  .hero-buttons a { width:100%; text-align:center; justify-content:center; }
  .value-cards { grid-template-columns:1fr; }
  .product-grid { grid-template-columns:1fr; }
  .projects-grid { grid-template-columns:1fr; }
  .nav-item { padding:6px 10px; font-size:11px; }
}