/* ============================================
   ZTEC — Industrial Paint Website
   Blue #1B3FA0 · Red #CC1F2D · Steel Gray
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,300;0,400;0,500;0,600;0,700;0,800;0,900;1,400&display=swap');

:root {
  --blue:        #1B3FA0;
  --blue-dark:   #122C7A;
  --blue-light:  #2B52C8;
  --red:         #CC1F2D;
  --red-dark:    #A8171F;
  --red-light:   #E8353F;
  --steel:       #6B7280;
  --steel-light: #9CA3AF;
  --steel-50:    #F8F9FA;
  --steel-100:   #F1F3F5;
  --steel-200:   #E5E7EB;
  --steel-300:   #D1D5DB;
  --white:       #FFFFFF;
  --black:       #0D0D0D;
  --text:        #1A1A2E;
  --text-muted:  #5A6478;
  --gold:        #D4A017;

  --font:        'Be Vietnam Pro', 'Helvetica Neue', Arial, sans-serif;
  --nav-h:       72px;
  --radius-sm:   4px;
  --radius:      8px;
  --radius-lg:   16px;
  --radius-xl:   24px;
  --radius-full: 9999px;
  --trans:       all .3s cubic-bezier(.4,0,.2,1);
  --shadow-sm:   0 2px 8px rgba(27,63,160,.08);
  --shadow:      0 6px 24px rgba(27,63,160,.12);
  --shadow-lg:   0 16px 48px rgba(27,63,160,.18);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.65;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; object-fit: cover; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: var(--font); }
ul { list-style: none; }

/* ── Typography ── */
h1 { font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 800; line-height: 1.12; letter-spacing: -.02em; }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.2rem); font-weight: 700; line-height: 1.2; letter-spacing: -.02em; }
h3 { font-size: clamp(1.05rem, 2vw, 1.3rem); font-weight: 700; line-height: 1.3; }
p  { color: var(--text-muted); line-height: 1.75; }

/* ── Layout ── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
section { padding: 80px 0; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 28px; border-radius: var(--radius-full);
  font-size: .88rem; font-weight: 700; letter-spacing: .03em;
  border: none; transition: var(--trans); white-space: nowrap; cursor: pointer;
}
.btn-primary { background: var(--red); color: var(--white); }
.btn-primary:hover { background: var(--red-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(204,31,45,.35); }
.btn-blue { background: var(--blue); color: var(--white); }
.btn-blue:hover { background: var(--blue-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,.5); }
.btn-outline:hover { background: var(--white); color: var(--blue); border-color: var(--white); }
.btn-outline-dark { background: transparent; color: var(--blue); border: 2px solid var(--blue); }
.btn-outline-dark:hover { background: var(--blue); color: var(--white); }

/* ── Section label ── */
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: .72rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: var(--red); margin-bottom: 12px;
}
.section-label::before {
  content: ''; width: 24px; height: 2px; background: var(--red);
}
.section-title { color: var(--text); }
.section-sub { color: var(--text-muted); font-size: .95rem; max-width: 560px; margin-top: 10px; }
.divider { width: 48px; height: 3px; background: var(--red); margin: 18px 0; border-radius: 2px; }

/* ═══════════════════════════════════════════
   NAVBAR
═══════════════════════════════════════════ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--nav-h);
  background: rgba(27,63,160,.97);
  backdrop-filter: blur(12px);
  transition: var(--trans);
}
.navbar.scrolled {
  background: rgba(18,44,122,.99);
  box-shadow: 0 4px 24px rgba(0,0,0,.25);
}
.nav-inner {
  max-width: 1200px; margin: 0 auto;
  padding: 0 24px; height: 100%;
  display: flex; align-items: center; gap: 32px;
}
.nav-logo { display: flex; align-items: center; flex-shrink: 0; }
.nav-logo img { height: 42px; width: auto; }
.nav-logo-text {
  font-size: 1.5rem; font-weight: 900; letter-spacing: .04em; color: var(--white);
  display: flex; align-items: center; gap: 0;
}
.nav-logo-text .z { color: var(--red); }
.nav-logo-text .tec { color: var(--white); }
.nav-links { display: flex; align-items: center; gap: 24px; margin-left: auto; }
.nav-links a {
  font-size: .84rem; font-weight: 600; color: rgba(255,255,255,.8);
  transition: var(--trans); position: relative; padding: 4px 0;
}
.nav-links a::after {
  content: ''; position: absolute; left: 0; bottom: -2px;
  width: 0; height: 2px; background: var(--red); transition: var(--trans);
}
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta { margin-left: 8px; }

.hamburger { display: none; background: none; border: none; padding: 4px; margin-left: auto; }
.hamburger span { display: block; width: 22px; height: 2px; background: var(--white); margin: 5px 0; transition: var(--trans); }
.mobile-menu {
  display: none; position: fixed; top: var(--nav-h); left: 0; right: 0;
  background: var(--blue-dark); padding: 20px 24px;
  flex-direction: column; gap: 4px; z-index: 999;
  box-shadow: 0 8px 32px rgba(0,0,0,.3);
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: .95rem; font-weight: 600; color: rgba(255,255,255,.85);
  padding: 12px 16px; border-radius: var(--radius);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: var(--trans);
}
.mobile-menu a:hover { background: rgba(255,255,255,.1); color: var(--white); }

/* ═══════════════════════════════════════════
   HERO — CAROUSEL
═══════════════════════════════════════════ */
.hero-carousel {
  position: relative; overflow: hidden;
  height: calc(100vh - var(--nav-h));
  min-height: 548px;
  margin-top: var(--nav-h);
}
.slides-wrapper { display: flex; height: 100%; transition: transform .85s cubic-bezier(.77,0,.175,1); }
.slide {
  flex: 0 0 100%; height: 100%;
  display: flex; align-items: center;
  position: relative; overflow: hidden;
}
.slide-1 { background: linear-gradient(120deg, var(--blue-dark) 0%, var(--blue) 60%, #2558D8 100%); }
.slide-2 { background: linear-gradient(120deg, #0D0D0D 0%, #1A1A2E 60%, var(--blue-dark) 100%); }
.slide-3 { background: linear-gradient(120deg, var(--red-dark) 0%, var(--red) 50%, #E04050 100%); }

/* geometric deco */
.slide-geo {
  position: absolute; right: 0; top: 0; bottom: 0; width: 50%;
  pointer-events: none; overflow: hidden;
}
.slide-geo::before {
  content: '';
  position: absolute; right: -80px; top: 50%; transform: translateY(-50%);
  width: 480px; height: 480px;
  border: 60px solid rgba(255,255,255,.06);
  border-radius: var(--radius-full);
}
.slide-geo::after {
  content: '';
  position: absolute; right: 80px; top: 50%; transform: translateY(-50%);
  width: 320px; height: 320px;
  border: 40px solid rgba(255,255,255,.04);
  border-radius: var(--radius-full);
}
.slide-product-img {
  position: absolute; right: 6%; top: 50%; transform: translateY(-50%);
  width: 38%; max-width: 420px; z-index: 2;
  filter: drop-shadow(0 24px 48px rgba(0,0,0,.4));
  animation: floatImg 6s ease-in-out infinite;
}
@keyframes floatImg {
  0%, 100% { transform: translateY(-50%) translateY(0); }
  50% { transform: translateY(-50%) translateY(-12px); }
}

.slide-inner {
  position: relative; z-index: 3;
  max-width: 1200px; margin: 0 auto;
  padding: 0 48px;
  width: 100%;
}
.slide-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  border-radius: var(--radius-full);
  padding: 6px 16px; font-size: .72rem; font-weight: 700;
  letter-spacing: .14em; text-transform: uppercase; color: rgba(255,255,255,.9);
  margin-bottom: 20px;
}
.slide-badge i { color: var(--gold); }
.slide-inner h1 { color: var(--white); max-width: 600px; }
.slide-inner h1 span { color: var(--red); }
.slide-2 h1 span { color: #60A5FA; }
.slide-3 h1 span { color: var(--white); text-decoration: underline; text-underline-offset: 6px; text-decoration-thickness: 3px; }
.slide-sub {
  font-size: clamp(.95rem, 1.5vw, 1.1rem); font-weight: 400;
  color: rgba(255,255,255,.72); max-width: 480px; margin: 18px 0 36px; line-height: 1.75;
}
.slide-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.slide-stats {
  display: flex; gap: 36px; margin-top: 28px; padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.12);
}
.slide-stat-num { font-size: 1.7rem; font-weight: 800; color: var(--white); line-height: 1; }
.slide-stat-label { font-size: .72rem; color: rgba(255,255,255,.55); margin-top: 4px; letter-spacing: .05em; }

/* dots & arrows */
.carousel-dots {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; gap: 10px; z-index: 10;
}
.dot {
  width: 8px; height: 8px; border-radius: var(--radius-full);
  background: rgba(255,255,255,.35); border: none; cursor: pointer; transition: var(--trans);
}
.dot.active { width: 32px; background: var(--white); }
.carousel-arrows {
  position: absolute; top: 50%; transform: translateY(-50%);
  left: 0; right: 0;
  display: flex; justify-content: space-between;
  padding: 0 24px; z-index: 10;
  pointer-events: none;
}
.arrow-btn {
  pointer-events: all;
  width: 52px; height: 52px; border-radius: var(--radius-full);
  background: rgba(255,255,255,.15); border: 1.5px solid rgba(255,255,255,.3);
  backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
  color: var(--white); font-size: 1rem; cursor: pointer; transition: var(--trans);
  box-shadow: 0 4px 16px rgba(0,0,0,.25);
}
.arrow-btn:hover { background: var(--red); border-color: var(--red); }

/* ═══════════════════════════════════════════
   BRAND STRIP (ticker)
═══════════════════════════════════════════ */
.brand-strip { background: var(--red); padding: 13px 0; overflow: hidden; }
.marquee-track {
  display: flex; animation: marquee 24s linear infinite; flex-shrink: 0;
}
.marquee-item {
  display: flex; align-items: center; gap: 12px; padding: 0 32px; flex-shrink: 0;
  font-size: .72rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase;
  color: rgba(255,255,255,.9); white-space: nowrap;
}
.marquee-item i { color: rgba(255,255,255,.6); font-size: .6rem; }
@keyframes marquee { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* ═══════════════════════════════════════════
   TRUST STRIP
═══════════════════════════════════════════ */
.trust-strip { background: var(--steel-50); border-top: 1px solid var(--steel-200); border-bottom: 1px solid var(--steel-200); padding: 40px 0; }
.trust-grid { display: flex; justify-content: space-around; flex-wrap: wrap; gap: 24px; }
.trust-item { display: flex; align-items: center; gap: 14px; }
.trust-icon {
  width: 48px; height: 48px; border-radius: var(--radius);
  background: var(--blue); color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem; flex-shrink: 0;
}
.trust-item-title { font-size: .88rem; font-weight: 700; color: var(--text); }
.trust-item-sub { font-size: .74rem; color: var(--text-muted); }

/* ═══════════════════════════════════════════
   FEATURED PRODUCTS
═══════════════════════════════════════════ */
.products-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card {
  border: 1px solid var(--steel-200); border-radius: var(--radius-lg);
  overflow: hidden; transition: var(--trans); background: var(--white);
  cursor: pointer;
}
.product-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-5px); border-color: var(--blue); }
.product-img {
  aspect-ratio: 1; background: var(--steel-50);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; position: relative;
}
.product-img img { width: 85%; height: 85%; object-fit: contain; transition: var(--trans); }
.product-card:hover .product-img img { transform: scale(1.05); }
.product-badge-wrap { position: absolute; top: 12px; left: 12px; display: flex; flex-direction: column; gap: 6px; }
.product-badge {
  font-size: .62rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
  padding: 4px 10px; border-radius: var(--radius-full);
  background: var(--red); color: var(--white);
}
.product-badge.blue { background: var(--blue); }
.product-info { padding: 18px; }
.product-code { font-size: .68rem; font-weight: 700; letter-spacing: .12em; text-transform: uppercase; color: var(--red); margin-bottom: 6px; }
.product-name { font-size: .92rem; font-weight: 700; color: var(--text); line-height: 1.4; margin-bottom: 8px; }
.product-name-en { font-size: .75rem; color: var(--text-muted); margin-bottom: 10px; }
.product-vol { display: inline-flex; align-items: center; gap: 6px; font-size: .75rem; font-weight: 600; color: var(--blue); }
.product-actions { display: flex; gap: 8px; margin-top: 14px; }
.product-actions .btn { flex: 1; padding: 9px 12px; font-size: .78rem; }

/* ═══════════════════════════════════════════
   WHY ZTEC
═══════════════════════════════════════════ */
.why-section { background: var(--blue-dark); }
.why-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.why-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius-lg); padding: 32px 24px; transition: var(--trans);
}
.why-card:hover { background: rgba(255,255,255,.1); transform: translateY(-4px); }
.why-icon {
  width: 52px; height: 52px; border-radius: var(--radius);
  background: var(--red); color: var(--white);
  display: flex; align-items: center; justify-content: center; font-size: 1.2rem;
  margin-bottom: 18px;
}
.why-title { font-size: 1rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.why-desc { font-size: .83rem; color: rgba(255,255,255,.55); line-height: 1.7; }
.why-section .section-label { color: rgba(255,255,255,.5); }
.why-section .section-label::before { background: rgba(255,255,255,.5); }
.why-section h2 { color: var(--white); }
.why-section .section-sub { color: rgba(255,255,255,.55); }

/* ═══════════════════════════════════════════
   VALUES (Z-T-E-C)
═══════════════════════════════════════════ */
.values-section { background: var(--steel-50); }
.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 48px; }
.value-card {
  background: var(--white); border: 1px solid var(--steel-200);
  border-radius: var(--radius-lg); padding: 32px 24px;
  text-align: center; transition: var(--trans); position: relative; overflow: hidden;
}
.value-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 4px; background: var(--blue);
}
.value-card:nth-child(2)::before, .value-card:nth-child(4)::before { background: var(--red); }
.value-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.value-letter {
  font-size: 3rem; font-weight: 900; color: var(--blue);
  line-height: 1; margin-bottom: 8px;
}
.value-card:nth-child(2) .value-letter,
.value-card:nth-child(4) .value-letter { color: var(--red); }
.value-keyword { font-size: .72rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--text-muted); margin-bottom: 12px; }
.value-title { font-size: 1rem; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.value-desc { font-size: .83rem; color: var(--text-muted); line-height: 1.7; }

/* ═══════════════════════════════════════════
   ABOUT (story)
═══════════════════════════════════════════ */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
.about-img-block {
  position: relative; border-radius: var(--radius-xl); overflow: hidden;
  aspect-ratio: 4/5; background: var(--steel-100);
  display: flex; align-items: center; justify-content: center;
}
.about-img-block img { width: 100%; height: 100%; }
.about-stat-overlay {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
  background: rgba(27,63,160,.95); border-radius: var(--radius-lg);
  padding: 20px 24px; backdrop-filter: blur(8px);
  display: flex; gap: 24px;
}
.about-stat-num { font-size: 1.5rem; font-weight: 800; color: var(--white); }
.about-stat-label { font-size: .72rem; color: rgba(255,255,255,.65); }
.about-feat { display: flex; flex-direction: column; gap: 16px; margin-top: 28px; }
.about-feat-item { display: flex; gap: 14px; align-items: flex-start; }
.about-feat-icon {
  width: 36px; height: 36px; border-radius: var(--radius); flex-shrink: 0;
  background: var(--blue); color: var(--white);
  display: flex; align-items: center; justify-content: center; font-size: .85rem;
}
.about-feat-title { font-size: .88rem; font-weight: 700; color: var(--text); }
.about-feat-desc { font-size: .8rem; color: var(--text-muted); line-height: 1.65; }

/* ═══════════════════════════════════════════
   APPLICATIONS
═══════════════════════════════════════════ */
.app-section { background: var(--black); padding: 80px 0; }
.app-section .section-label::before { background: var(--red); }
.app-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2px; background: rgba(255,255,255,.06); margin-top: 48px; border-radius: var(--radius-lg); overflow: hidden; border: 1px solid rgba(255,255,255,.06); }
.app-item {
  background: #111; padding: 36px 28px;
  transition: var(--trans); cursor: pointer;
}
.app-item:hover { background: var(--blue-dark); }
.app-icon { font-size: 2.2rem; margin-bottom: 16px; }
.app-title { font-size: .95rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.app-desc { font-size: .8rem; color: rgba(255,255,255,.45); line-height: 1.7; }
.app-section h2 { color: var(--white); }
.app-section .section-sub { color: rgba(255,255,255,.5); }
.app-section .section-label { color: var(--red); }

/* ═══════════════════════════════════════════
   STATS SECTION
═══════════════════════════════════════════ */
.stats-section { background: var(--red); padding: 60px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
.stat-item {
  text-align: center; padding: 20px;
  border-right: 1px solid rgba(255,255,255,.15);
}
.stat-item:last-child { border-right: none; }
.stat-num { font-size: clamp(2rem, 4vw, 2.8rem); font-weight: 900; color: var(--white); line-height: 1; }
.stat-label { font-size: .78rem; color: rgba(255,255,255,.7); margin-top: 6px; letter-spacing: .06em; }

/* ═══════════════════════════════════════════
   PAGE HERO (inner pages)
═══════════════════════════════════════════ */
.page-hero {
  background: linear-gradient(120deg, var(--blue-dark) 0%, var(--blue) 100%);
  padding: 100px 0 60px; margin-top: var(--nav-h);
  position: relative; overflow: hidden;
}
.page-hero::after {
  content: ''; position: absolute; right: -100px; top: -100px;
  width: 500px; height: 500px;
  border: 80px solid rgba(255,255,255,.04);
  border-radius: var(--radius-full); pointer-events: none;
}
.page-hero .breadcrumb { font-size: .78rem; color: rgba(255,255,255,.5); margin-bottom: 16px; }
.page-hero .breadcrumb a { color: rgba(255,255,255,.5); }
.page-hero .breadcrumb a:hover { color: var(--white); }
.page-hero .breadcrumb span { color: rgba(255,255,255,.85); }
.page-hero h1 { color: var(--white); }
.page-hero p { color: rgba(255,255,255,.65); max-width: 560px; margin-top: 12px; }

/* ═══════════════════════════════════════════
   PRODUCT FILTER (san-pham.html)
═══════════════════════════════════════════ */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.filter-btn {
  padding: 9px 22px; border-radius: var(--radius-full);
  border: 2px solid var(--steel-200); background: transparent;
  font-size: .82rem; font-weight: 700; color: var(--text-muted);
  transition: var(--trans); cursor: pointer;
}
.filter-btn:hover { border-color: var(--blue); color: var(--blue); }
.filter-btn.active { background: var(--blue); color: var(--white); border-color: var(--blue); }
.products-full-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.product-card.hidden { display: none; }

/* ═══════════════════════════════════════════
   PRODUCT DETAIL (popup/panel)
═══════════════════════════════════════════ */
.spec-table { width: 100%; border-collapse: collapse; margin-top: 16px; }
.spec-table th, .spec-table td {
  padding: 10px 16px; text-align: left; font-size: .82rem;
  border-bottom: 1px solid var(--steel-200);
}
.spec-table th { font-weight: 700; color: var(--text); background: var(--steel-50); width: 40%; }
.spec-table td { color: var(--text-muted); }

/* ═══════════════════════════════════════════
   ABOUT PAGE (ve-ztec)
═══════════════════════════════════════════ */
.team-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.team-card { border: 1px solid var(--steel-200); border-radius: var(--radius-lg); overflow: hidden; text-align: center; transition: var(--trans); }
.team-card:hover { box-shadow: var(--shadow); transform: translateY(-4px); }
.team-avatar { aspect-ratio: 1; background: var(--steel-100); display: flex; align-items: center; justify-content: center; font-size: 4rem; }
.team-info { padding: 20px; }
.team-name { font-size: .95rem; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.team-role { font-size: .75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: .08em; }

/* ═══════════════════════════════════════════
   CONTACT (lien-he)
═══════════════════════════════════════════ */
.contact-grid { display: grid; grid-template-columns: 1fr 1.4fr; gap: 64px; align-items: start; }
.contact-info-item { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 24px; }
.contact-icon {
  width: 40px; height: 40px; border-radius: var(--radius); flex-shrink: 0;
  background: var(--blue); color: var(--white);
  display: flex; align-items: center; justify-content: center; font-size: .9rem;
}
.contact-info-title { font-size: .85rem; font-weight: 700; color: var(--text); }
.contact-info-val { font-size: .85rem; color: var(--text-muted); }
.form-group { margin-bottom: 18px; }
.form-label { font-size: .8rem; font-weight: 700; color: var(--text); margin-bottom: 8px; display: block; }
.form-control {
  width: 100%; padding: 12px 16px;
  border: 2px solid var(--steel-200); border-radius: var(--radius);
  font-family: var(--font); font-size: .88rem; color: var(--text);
  background: var(--white); transition: var(--trans); outline: none;
}
.form-control:focus { border-color: var(--blue); }
textarea.form-control { resize: vertical; min-height: 130px; }

/* FAQ */
.faq-list { display: flex; flex-direction: column; gap: 8px; }
.faq-item { border: 2px solid var(--steel-200); border-radius: var(--radius-lg); overflow: hidden; transition: var(--trans); }
.faq-item.open { border-color: var(--blue); }
.faq-question {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 20px; cursor: pointer; font-size: .88rem; font-weight: 700; color: var(--text);
  background: var(--white); border: none; width: 100%; text-align: left; gap: 12px;
}
.faq-question:hover { background: var(--steel-50); }
.faq-icon { color: var(--blue); transition: var(--trans); flex-shrink: 0; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-answer-inner { padding: 0 20px 16px; font-size: .85rem; color: var(--text-muted); line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 240px; }

/* ═══════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════ */
footer { background: var(--text); color: var(--white); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1.2fr; gap: 48px; padding-bottom: 48px; }
.footer-logo-text { font-size: 1.6rem; font-weight: 900; letter-spacing: .04em; margin-bottom: 12px; }
.footer-logo-text .z { color: var(--red); }
.footer-logo-text .tec { color: var(--white); }
.footer-tagline { font-size: .82rem; color: rgba(255,255,255,.45); line-height: 1.7; max-width: 240px; margin-bottom: 20px; }
.footer-socials { display: flex; gap: 10px; }
.social-btn {
  width: 36px; height: 36px; border-radius: var(--radius);
  background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.1);
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.5); font-size: .85rem; transition: var(--trans);
}
.social-btn:hover { background: var(--red); color: var(--white); border-color: var(--red); }
.footer-heading { font-size: .68rem; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; color: rgba(255,255,255,.35); margin-bottom: 16px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { font-size: .85rem; color: rgba(255,255,255,.5); transition: var(--trans); }
.footer-links a:hover { color: var(--white); }
.footer-contact-item { font-size: .82rem; color: rgba(255,255,255,.5); margin-bottom: 10px; line-height: 1.6; }
.footer-contact-item i { color: var(--red); margin-right: 8px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.07); padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
}
.footer-copy { font-size: .78rem; color: rgba(255,255,255,.3); }
.footer-badges { display: flex; gap: 8px; }
.footer-badge {
  font-size: .65rem; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  padding: 4px 10px; border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,.12); color: rgba(255,255,255,.4);
}

/* ═══════════════════════════════════════════
   UTILITIES
═══════════════════════════════════════════ */
.text-center { text-align: center; }
.text-center .section-sub { margin-left: auto; margin-right: auto; }
.text-center .divider { margin-left: auto; margin-right: auto; }
.text-center .section-label { justify-content: center; }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
.reveal-delay-1 { transition-delay: .1s; }
.reveal-delay-2 { transition-delay: .2s; }
.reveal-delay-3 { transition-delay: .3s; }
.reveal-delay-4 { transition-delay: .4s; }
.bg-light { background: var(--steel-50); }

/* ═══════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════ */
@media (max-width: 1024px) {
  .products-grid, .products-full-grid { grid-template-columns: repeat(3, 1fr); }
  .why-grid, .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item:nth-child(2) { border-right: none; }
  .stat-item:nth-child(3) { border-right: 1px solid rgba(255,255,255,.15); }
  .app-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .team-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  section { padding: 60px 0; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: block; }
  .slide-product-img { display: none; }
  .slide-inner { padding: 0 24px; }
  .products-grid, .products-full-grid { grid-template-columns: 1fr 1fr; }
  .carousel-arrows { padding: 0 12px; }
  .arrow-btn { width: 44px; height: 44px; font-size: .85rem; }
  .slide-stats { gap: 16px; flex-wrap: wrap; }
  .why-grid, .values-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .products-grid, .products-full-grid { grid-template-columns: 1fr; }
  .why-grid, .values-grid { grid-template-columns: 1fr; }
  .app-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .team-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .slide-stats { display: none; }
}