/* ========================================
   CÔNG NGHỆ G9 – LANDING PAGE STYLESHEET
   ======================================== */

/* ---- CSS VARIABLES ---- */
:root {
  --primary: #1e6ff5;
  --primary-dark: #1558d6;
  --primary-light: #4b91f7;
  --secondary: #0ea5e9;
  --accent: #06c4a0;
  --bg: #f8faff;
  --bg-dark: #0d1117;
  --surface: #ffffff;
  --surface-2: #f1f5fe;
  --border: rgba(30, 111, 245, 0.12);
  --text: #1a202c;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 20px rgba(30,111,245,0.12);
  --shadow-lg: 0 12px 48px rgba(30,111,245,0.18);
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
  --font-main: 'Inter', system-ui, sans-serif;
  --font-display: 'Raleway', 'Inter', sans-serif;
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-main); color: var(--text); background: var(--bg); line-height: 1.6; overflow-x: hidden; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
address { font-style: normal; }
button { cursor: pointer; border: none; background: none; }

/* ---- UTILITIES ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.highlight { background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.section { padding: 100px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-tag {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 600; letter-spacing: 1.2px; text-transform: uppercase;
  color: var(--primary); background: rgba(30,111,245,0.08);
  padding: 6px 16px; border-radius: 50px; margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-display); font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800; line-height: 1.2; color: var(--text); margin-bottom: 16px;
}
.section-desc { color: var(--text-muted); font-size: 1.05rem; max-width: 560px; margin: 0 auto; }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 13px 28px; border-radius: 50px; font-size: 15px; font-weight: 600;
  transition: var(--transition); cursor: pointer; border: 2px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff; box-shadow: 0 4px 20px rgba(30,111,245,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 32px rgba(30,111,245,0.45); }
.btn-ghost {
  background: rgba(255,255,255,0.12); color: #fff; border-color: rgba(255,255,255,0.3);
  backdrop-filter: blur(10px);
}
.btn-ghost:hover { background: rgba(255,255,255,0.22); transform: translateY(-2px); }
.btn-outline { border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-full { width: 100%; justify-content: center; border-radius: var(--radius-sm); }

/* ========================================
   NAVBAR
   ======================================== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 0; transition: var(--transition);
}
.navbar.scrolled {
  background: rgba(255,255,255,0.95); backdrop-filter: blur(20px);
  box-shadow: 0 1px 30px rgba(0,0,0,0.08); padding: 12px 0;
}
.nav-container { display: flex; align-items: center; gap: 32px; }
.nav-logo { display: flex; align-items: center; gap: 12px; text-decoration: none; flex-shrink: 0; }
.logo-icon {
  width: 44px; height: 44px; border-radius: 12px; font-size: 16px; font-weight: 900;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff; letter-spacing: 1px; font-family: var(--font-display);
  box-shadow: 0 4px 14px rgba(30,111,245,0.35);
}
.logo-text { display: flex; flex-direction: column; line-height: 1.1; }
.logo-main { font-weight: 700; font-size: 15px; color: var(--text); }
.logo-sub { font-size: 11px; color: var(--text-muted); font-weight: 400; }
.navbar.scrolled .logo-main { color: var(--text); }

.nav-links { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav-link {
  padding: 8px 16px; border-radius: 50px; font-size: 14px; font-weight: 500;
  color: rgba(255,255,255,0.85); transition: var(--transition);
}
.nav-link:hover, .nav-link.active { background: rgba(255,255,255,0.15); color: #fff; }
.navbar.scrolled .nav-link { color: var(--text-muted); }
.navbar.scrolled .nav-link:hover, .navbar.scrolled .nav-link.active {
  background: rgba(30,111,245,0.08); color: var(--primary);
}
.nav-cta { padding: 10px 22px; font-size: 14px; }
.navbar.scrolled .nav-cta { border-color: var(--primary); color: var(--primary); }
.navbar.scrolled .nav-cta:hover { background: var(--primary); color: #fff; }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; margin-left: auto; }
.hamburger span { width: 24px; height: 2px; background: #fff; border-radius: 2px; transition: var(--transition); display: block; }
.navbar.scrolled .hamburger span { background: var(--text); }
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ========================================
   HERO
   ======================================== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, #0d1b40 0%, #0f3460 40%, #16213e 100%);
  overflow: hidden;
}
.hero-bg { position: absolute; inset: 0; overflow: hidden; }
.hero-orb {
  position: absolute; border-radius: 50%;
  filter: blur(80px); opacity: 0.4;
}
.hero-orb-1 {
  width: 600px; height: 600px; top: -150px; right: -100px;
  background: radial-gradient(circle, rgba(30,111,245,0.6) 0%, transparent 70%);
  animation: float-orb 8s ease-in-out infinite;
}
.hero-orb-2 {
  width: 400px; height: 400px; bottom: -100px; left: -80px;
  background: radial-gradient(circle, rgba(6,196,160,0.5) 0%, transparent 70%);
  animation: float-orb 10s ease-in-out infinite reverse;
}
.hero-orb-3 {
  width: 300px; height: 300px; top: 50%; left: 50%;
  background: radial-gradient(circle, rgba(14,165,233,0.4) 0%, transparent 70%);
  animation: float-orb 12s ease-in-out infinite;
}
.hero-grid {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}
@keyframes float-orb {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -30px) scale(1.05); }
}

.hero-content {
  position: relative; z-index: 2; display: flex; flex-direction: column;
  align-items: center; text-align: center; padding-top: 100px; padding-bottom: 60px;
  gap: 28px;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 50px;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15);
  color: rgba(255,255,255,0.85); font-size: 14px; backdrop-filter: blur(10px);
  animation: fadeInDown 0.8s ease both;
}
.badge-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--accent);
  box-shadow: 0 0 0 3px rgba(6,196,160,0.3);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 3px rgba(6,196,160,0.3); }
  50% { box-shadow: 0 0 0 6px rgba(6,196,160,0.1); }
}

.hero-title {
  font-family: var(--font-display); font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 900; line-height: 1.15; color: #fff;
  animation: fadeInUp 0.8s ease 0.2s both;
}
.hero-title .highlight {
  background: linear-gradient(135deg, #4b91f7 0%, #06c4a0 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
  color: rgba(255,255,255,0.7); font-size: clamp(1rem, 2vw, 1.15rem);
  max-width: 620px; line-height: 1.7;
  animation: fadeInUp 0.8s ease 0.35s both;
}
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 14px; justify-content: center;
  animation: fadeInUp 0.8s ease 0.5s both;
}
.hero-stats {
  display: flex; align-items: center; gap: 40px; margin-top: 16px;
  animation: fadeInUp 0.8s ease 0.65s both;
}
.stat-item { text-align: center; }
.stat-num {
  font-family: var(--font-display); font-size: 2.5rem; font-weight: 900;
  color: #fff; display: inline;
}
.stat-plus { font-size: 1.8rem; font-weight: 700; color: var(--accent); }
.stat-label { display: block; font-size: 13px; color: rgba(255,255,255,0.5); margin-top: 2px; }
.stat-divider { width: 1px; height: 50px; background: rgba(255,255,255,0.15); }

.hero-scroll {
  position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,0.4); font-size: 12px; z-index: 2;
  animation: fadeIn 1s ease 1s both;
}
.scroll-mouse {
  width: 24px; height: 38px; border: 2px solid rgba(255,255,255,0.2);
  border-radius: 12px; display: flex; justify-content: center; padding-top: 6px;
}
.scroll-wheel {
  width: 4px; height: 8px; background: rgba(255,255,255,0.5);
  border-radius: 2px; animation: scroll-down 2s ease-in-out infinite;
}
@keyframes scroll-down {
  0% { transform: translateY(0); opacity: 1; }
  100% { transform: translateY(10px); opacity: 0; }
}

/* ========================================
   PRODUCTS
   ======================================== */
.products-section { background: var(--surface); }
.products-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.product-card {
  position: relative; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 36px 32px; display: flex; flex-direction: column; gap: 16px;
  transition: var(--transition); overflow: hidden;
}
.product-card::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(30,111,245,0.02) 0%, transparent 60%);
  opacity: 0; transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(30,111,245,0.25); }
.product-card:hover::before { opacity: 1; }
.product-card:hover .product-glow { opacity: 1; }

.product-glow {
  position: absolute; top: -60px; right: -60px; width: 200px; height: 200px;
  border-radius: 50%; background: radial-gradient(circle, rgba(30,111,245,0.1) 0%, transparent 70%);
  opacity: 0; transition: var(--transition);
}
.product-card--featured {
  background: linear-gradient(145deg, #0f2456 0%, #0d1b3e 100%);
  border-color: rgba(30,111,245,0.4); color: #fff;
}
.product-card--featured .product-tag-label { color: rgba(255,255,255,0.6); background: rgba(255,255,255,0.1); }
.product-card--featured .product-name { color: #fff; }
.product-card--featured .product-desc { color: rgba(255,255,255,0.65); }
.product-card--featured .product-features li { color: rgba(255,255,255,0.8); }
.product-card--featured .product-features li svg { stroke: var(--accent); }
.product-card--featured .product-link { color: #4b91f7; }
.product-card--featured .product-link:hover { color: #fff; }
.product-card--featured:hover { box-shadow: 0 12px 48px rgba(30,111,245,0.35); }

.product-featured-badge {
  position: absolute; top: 16px; right: 16px;
  font-size: 12px; font-weight: 600; padding: 4px 12px; border-radius: 50px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
}
.product-icon-wrap { width: 60px; height: 60px; }
.product-icon {
  width: 60px; height: 60px; border-radius: 14px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, rgba(30,111,245,0.1) 0%, rgba(14,165,233,0.08) 100%);
  color: var(--primary); border: 1px solid rgba(30,111,245,0.15);
  transition: var(--transition);
}
.product-card:hover .product-icon { background: linear-gradient(135deg, var(--primary), var(--secondary)); color: #fff; }
.product-card--featured .product-icon { background: rgba(255,255,255,0.1); color: #4b91f7; border-color: rgba(255,255,255,0.1); }

.product-tag-label {
  font-size: 12px; font-weight: 600; letter-spacing: 0.8px; text-transform: uppercase;
  color: var(--primary); background: rgba(30,111,245,0.08);
  padding: 4px 10px; border-radius: 50px; align-self: flex-start;
}
.product-name {
  font-family: var(--font-display); font-size: 1.6rem; font-weight: 800; color: var(--text);
}
.product-desc { color: var(--text-muted); font-size: 0.95rem; line-height: 1.65; flex: 1; }
.product-features { display: flex; flex-direction: column; gap: 8px; }
.product-features li {
  display: flex; align-items: center; gap: 8px;
  font-size: 14px; color: var(--text-muted);
}
.product-features li svg { stroke: var(--primary); flex-shrink: 0; }
.product-link {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 600; color: var(--primary); margin-top: 4px;
  transition: var(--transition);
}
.product-link:hover { gap: 10px; }

/* ========================================
   ABOUT
   ======================================== */
.about-section { background: var(--bg); position: relative; overflow: hidden; }
.about-bg-decoration {
  position: absolute; top: -200px; right: -200px;
  width: 600px; height: 600px; border-radius: 50%;
  background: radial-gradient(circle, rgba(30,111,245,0.04) 0%, transparent 70%);
}
.about-container { display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: center; }

/* About visual */
.about-visual {
  position: relative; min-height: 420px; display: flex; align-items: center; justify-content: center;
}
.about-center-logo {
  position: relative; display: flex; align-items: center; justify-content: center;
  width: 160px; height: 160px;
}
.about-logo-ring {
  position: absolute; border-radius: 50%;
  border: 1px solid rgba(30,111,245,0.15);
  animation: spin-ring 20s linear infinite;
}
.about-logo-ring { width: 260px; height: 260px; }
.about-logo-ring::before {
  content: ''; position: absolute; top: 10px; left: 10px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--primary);
}
.about-logo-ring--2 {
  width: 360px; height: 360px; animation-duration: 30s; animation-direction: reverse;
  border-color: rgba(6,196,160,0.1);
}
.about-logo-ring--2::before { background: var(--accent); top: 20px; }
@keyframes spin-ring { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

.about-logo-core {
  width: 110px; height: 110px; border-radius: 28px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-display); font-size: 2.2rem; font-weight: 900; color: #fff;
  letter-spacing: 2px; box-shadow: 0 8px 32px rgba(30,111,245,0.4); z-index: 2;
}

.about-float-card {
  position: absolute; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 14px 18px; display: flex; align-items: center; gap: 12px;
  box-shadow: var(--shadow-md); z-index: 3;
  animation: float-card 4s ease-in-out infinite;
}
.about-float-card strong { display: block; font-size: 13px; font-weight: 600; color: var(--text); }
.about-float-card span { font-size: 12px; color: var(--text-muted); }
.about-float-card > div:last-child { display: flex; flex-direction: column; }
.fc-icon { font-size: 24px; }

.card-top-left { top: 60px; left: 0; animation-delay: 0s; }
.card-top-right { top: 60px; right: 0; animation-delay: 1s; }
.card-bottom { bottom: 60px; left: 50%; transform: translateX(-50%); animation-delay: 2s; }

@keyframes float-card {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.card-bottom { animation-name: float-card-center; }
@keyframes float-card-center {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(-8px); }
}

/* About content */
.about-content { display: flex; flex-direction: column; gap: 20px; }
.about-text { color: var(--text-muted); font-size: 1rem; line-height: 1.75; }
.about-vision-box, .about-mission-box {
  display: flex; gap: 16px; padding: 20px 24px;
  background: var(--surface-2); border-radius: var(--radius-sm);
  border-left: 3px solid var(--primary);
}
.about-mission-box { border-left-color: var(--accent); }
.vision-icon-wrap {
  flex-shrink: 0; width: 40px; height: 40px; border-radius: 10px;
  background: rgba(30,111,245,0.08); display: flex; align-items: center; justify-content: center;
  color: var(--primary);
}
.about-mission-box .vision-icon-wrap { background: rgba(6,196,160,0.1); color: var(--accent); }
.about-vision-box strong, .about-mission-box strong { display: block; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.about-vision-box p, .about-mission-box p { color: var(--text-muted); font-size: 14px; line-height: 1.65; }

/* ========================================
   WHY US
   ======================================== */
.whyus-section { background: var(--surface); }
.whyus-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.whyus-item {
  padding: 32px 24px; border: 1px solid var(--border); border-radius: var(--radius);
  transition: var(--transition); position: relative; overflow: hidden;
}
.whyus-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(30,111,245,0.25); }
.whyus-num {
  font-family: var(--font-display); font-size: 3rem; font-weight: 900;
  color: rgba(30,111,245,0.1); line-height: 1; margin-bottom: 12px;
}
.whyus-item h4 { font-size: 15px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.whyus-item p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }

/* ========================================
   GALLERY
   ======================================== */
.gallery-section { background: var(--bg); }
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: auto auto;
  gap: 16px;
}
.gallery-item { border-radius: var(--radius); overflow: hidden; cursor: pointer; }
.gallery-item--large { grid-column: span 2; }
.gallery-item--tall { grid-row: span 2; }

.gallery-inner {
  height: 220px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 12px;
  border-radius: var(--radius); color: rgba(255,255,255,0.8);
  transition: var(--transition);
}
.gallery-item--large .gallery-inner { height: 280px; }
.gallery-item--tall .gallery-inner { height: 100%; min-height: 456px; }
.gallery-inner:hover { transform: scale(1.02); filter: brightness(1.1); }
.gallery-inner span { font-size: 14px; font-weight: 500; }

.gallery-c1 { background: linear-gradient(135deg, #1e3a5f 0%, #2563eb 100%); }
.gallery-c2 { background: linear-gradient(135deg, #0f4c75 0%, #0ea5e9 100%); }
.gallery-c3 { background: linear-gradient(135deg, #064e3b 0%, #059669 100%); }
.gallery-c4 { background: linear-gradient(135deg, #312e81 0%, #7c3aed 100%); }
.gallery-c5 { background: linear-gradient(135deg, #7c2d12 0%, #f97316 100%); }
.gallery-c6 { background: linear-gradient(135deg, #1e1b4b 0%, #4f46e5 100%); }

/* ========================================
   CONTACT
   ======================================== */
.contact-section { background: var(--surface); position: relative; overflow: hidden; }
.contact-bg-wave {
  position: absolute; top: 0; left: 0; right: 0; height: 6px;
  background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent), var(--primary));
  background-size: 300% 100%; animation: wave-move 4s ease-in-out infinite;
}
@keyframes wave-move {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.contact-container { display: grid; grid-template-columns: 1fr 1.4fr; gap: 60px; align-items: start; }
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-info h3 {
  font-family: var(--font-display); font-size: 1.5rem; font-weight: 700; color: var(--text);
}
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-icon {
  flex-shrink: 0; width: 44px; height: 44px; border-radius: 12px;
  background: rgba(30,111,245,0.08); display: flex; align-items: center; justify-content: center;
  color: var(--primary); margin-top: 2px;
}
.contact-item strong { display: block; font-weight: 600; color: var(--text); margin-bottom: 4px; font-size: 14px; }
.contact-item p { color: var(--text-muted); font-size: 14px; line-height: 1.6; }
.contact-item a { color: var(--primary); font-weight: 500; }
.contact-item a:hover { text-decoration: underline; }

.social-links { display: flex; gap: 10px; margin-top: 8px; }
.social-link {
  width: 42px; height: 42px; border-radius: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); transition: var(--transition);
}
.social-link:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }

/* Form */
.contact-form { display: flex; flex-direction: column; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label { font-size: 14px; font-weight: 600; color: var(--text); }
.req { color: #ef4444; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 13px 16px; font-size: 14px; font-family: var(--font-main);
  border: 1.5px solid #e2e8f0; border-radius: var(--radius-sm);
  background: var(--surface-2); color: var(--text); outline: none;
  transition: var(--transition); resize: vertical;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  border-color: var(--primary); background: #fff;
  box-shadow: 0 0 0 3px rgba(30,111,245,0.1);
}
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-light); }
.form-success {
  display: flex; align-items: center; gap: 10px;
  padding: 14px 18px; border-radius: var(--radius-sm);
  background: rgba(6,196,160,0.1); color: var(--accent);
  border: 1px solid rgba(6,196,160,0.3); font-weight: 600; font-size: 14px;
}
.form-note { font-size: 13px; color: var(--text-light); text-align: center; }

/* ========================================
   FOOTER
   ======================================== */
.footer { background: #0d1117; color: rgba(255,255,255,0.7); padding-top: 70px; }
.footer-container { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1.4fr; gap: 48px; padding-bottom: 60px; }
.footer-brand { display: flex; flex-direction: column; gap: 16px; }
.footer-brand .logo-main { color: #fff; }
.footer-brand .logo-sub { color: rgba(255,255,255,0.4); }
.footer-tagline { font-size: 14px; color: rgba(255,255,255,0.45); line-height: 1.6; }
.footer-social { display: flex; gap: 10px; }
.footer-social .social-link { background: rgba(255,255,255,0.06); border-color: rgba(255,255,255,0.1); color: rgba(255,255,255,0.5); }
.footer-social .social-link:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

.footer-links h4, .footer-products h4, .footer-contact-col h4 {
  font-size: 13px; font-weight: 700; letter-spacing: 1px; text-transform: uppercase;
  color: #fff; margin-bottom: 20px;
}
.footer-links ul, .footer-products ul { display: flex; flex-direction: column; gap: 10px; }
.footer-links a, .footer-products a { font-size: 14px; color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-links a:hover, .footer-products a:hover { color: var(--primary-light); padding-left: 4px; }
.footer-contact-col address { display: flex; flex-direction: column; gap: 8px; }
.footer-contact-col p { font-size: 14px; color: rgba(255,255,255,0.5); line-height: 1.6; }
.footer-contact-col a { color: rgba(255,255,255,0.5); transition: var(--transition); }
.footer-contact-col a:hover { color: var(--primary-light); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0; text-align: center;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.3); }

/* ========================================
   SCROLL TOP
   ======================================== */
.scroll-top {
  position: fixed; bottom: 30px; right: 30px; z-index: 999;
  width: 48px; height: 48px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff; display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(30,111,245,0.4);
  opacity: 0; transform: translateY(20px); pointer-events: none;
  transition: var(--transition);
}
.scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scroll-top:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(30,111,245,0.5); }

/* ========================================
   ANIMATIONS
   ======================================== */
@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.animate-in {
  opacity: 0; transform: translateY(40px); transition: opacity 0.7s ease, transform 0.7s ease;
}
.animate-in.visible { opacity: 1; transform: translateY(0); }

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
  .products-grid { grid-template-columns: repeat(3, 1fr); }
  .whyus-grid { grid-template-columns: repeat(2, 1fr); }
  .about-container { grid-template-columns: 1fr; gap: 50px; }
  .about-visual { min-height: 320px; }
  .footer-container { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .section { padding: 70px 0; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.mobile-open {
    display: flex; flex-direction: column; position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(13,17,23,0.97); backdrop-filter: blur(20px);
    z-index: 999; justify-content: center; align-items: center; gap: 8px;
    padding: 100px 40px 40px;
  }
  .nav-links.mobile-open .nav-link {
    font-size: 1.5rem; font-weight: 700; padding: 16px 32px;
    color: rgba(255,255,255,0.85);
  }
  .products-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .whyus-grid { grid-template-columns: 1fr 1fr; }
  .gallery-grid { grid-template-columns: 1fr 1fr; }
  .gallery-item--large, .gallery-item--tall { grid-column: auto; grid-row: auto; }
  .gallery-item--tall .gallery-inner { min-height: 220px; }
  .contact-container { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
  .footer-container { grid-template-columns: 1fr; gap: 32px; }
  .about-visual { display: none; }
  .about-container { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-stats { flex-direction: column; gap: 16px; }
  .stat-divider { width: 60px; height: 1px; }
  .whyus-grid { grid-template-columns: 1fr; }
  .gallery-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-ghost { display: none; }
}