/* ============================================================
   MHI Trading & Contracting Group — Main Stylesheet
   Colors: Red #C84C47 | Dark Blue #1E3A5F | Black #222222
============================================================ */

/* --- Reset & Base --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --red:       #C84C47;
  --red-dark:  #a63a36;
  --blue:      #1E3A5F;
  --blue-dark: #152b47;
  --blue-light:#2a4f82;
  --black:     #222222;
  --white:     #FFFFFF;
  --gray-50:   #F8F9FA;
  --gray-100:  #F1F3F5;
  --gray-200:  #E9ECEF;
  --gray-400:  #ADB5BD;
  --gray-600:  #6C757D;
  --gray-800:  #343A40;
  --shadow-sm: 0 2px 8px rgba(0,0,0,.08);
  --shadow-md: 0 6px 24px rgba(0,0,0,.12);
  --shadow-lg: 0 16px 48px rgba(0,0,0,.16);
  --radius:    10px;
  --radius-lg: 18px;
  --transition: 0.3s ease;
  --font-body: 'Inter', sans-serif;
  --font-head: 'Poppins', sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--black);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============================================================
   BUTTONS
============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 50px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .95rem;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--red);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(200,76,71,.35);
}
.btn-primary:hover {
  background: var(--red-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(200,76,71,.45);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,.6);
}
.btn-outline:hover {
  background: rgba(255,255,255,.12);
  border-color: var(--white);
}

.btn-primary-light {
  background: var(--white);
  color: var(--blue);
  font-weight: 700;
  box-shadow: var(--shadow-md);
}
.btn-primary-light:hover {
  background: var(--gray-100);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* ============================================================
   SECTION COMMONS
============================================================ */
.section { padding: 64px 0; }

.section-header {
  text-align: center;
  margin-bottom: 40px;
}

.section-tag {
  display: inline-block;
  background: rgba(200,76,71,.1);
  color: var(--red);
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 16px;
}

.section-tag-light {
  background: rgba(255,255,255,.15);
  color: var(--white);
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 700;
  color: var(--blue);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-title-light { color: var(--white); }

.section-divider {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--red), var(--blue));
  border-radius: 2px;
  margin: 0 auto 20px;
}

.section-divider-light {
  background: linear-gradient(90deg, var(--white), rgba(255,255,255,.3));
}

.section-subtitle {
  color: var(--gray-600);
  max-width: 680px;
  margin: 0 auto;
  font-size: 1.05rem;
}

.section-subtitle-light { color: rgba(255,255,255,.8); }

/* ============================================================
   HEADER / NAV
============================================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  transition: background .35s ease, box-shadow .35s ease;
  padding: 0;
}

.header.scrolled {
  background: var(--white);
  box-shadow: 0 2px 24px rgba(0,0,0,.1);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 120px;
}

.logo-img {
  height: 108px;
  width: auto;
  object-fit: contain;
  display: block;
  background: var(--white);
  border-radius: 10px;
  padding: 6px 12px;
  transition: var(--transition);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  font-size: .88rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  color: rgba(255,255,255,.9);
  transition: var(--transition);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--red);
  transform: scaleX(0);
  transition: transform .25s ease;
  border-radius: 1px;
}

.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }

.nav-link:hover,
.nav-link.active { color: var(--white); }

.header.scrolled .nav-link { color: var(--gray-800); }
.header.scrolled .nav-link:hover,
.header.scrolled .nav-link.active { color: var(--blue); }

.nav-link.nav-cta {
  background: var(--red);
  color: var(--white) !important;
  padding: 10px 20px;
  border-radius: 50px;
  font-weight: 600;
}

.nav-link.nav-cta::after { display: none; }

.nav-link.nav-cta:hover {
  background: var(--red-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(200,76,71,.4);
}

.nav-link.lang-switch {
  border: 1.5px solid rgba(255,255,255,.5);
  padding: 7px 14px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  letter-spacing: .03em;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.nav-link.lang-switch::after { display: none; }
.nav-link.lang-switch:hover {
  background: rgba(255,255,255,.15);
  border-color: rgba(255,255,255,.9);
}
.header.scrolled .nav-link.lang-switch {
  border-color: var(--blue);
  color: var(--blue) !important;
}
.header.scrolled .nav-link.lang-switch:hover {
  background: var(--blue);
  color: var(--white) !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  z-index: 1100;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--white);
  border-radius: 2px;
  transition: var(--transition);
}

.header.scrolled .hamburger span { background: var(--blue); }

.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ============================================================
   HERO
============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, var(--blue-dark) 0%, var(--blue) 40%, #1a4a75 60%, #0d2238 100%);
}

/* Animated geometric shapes */
.hero-bg::before,
.hero-bg::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: .06;
}
.hero-bg::before {
  width: 700px; height: 700px;
  background: var(--red);
  top: -200px; right: -200px;
  animation: float1 12s ease-in-out infinite alternate;
}
.hero-bg::after {
  width: 500px; height: 500px;
  background: var(--white);
  bottom: -200px; left: -100px;
  animation: float2 15s ease-in-out infinite alternate;
}

@keyframes float1 { from { transform: translate(0,0) scale(1); } to { transform: translate(40px, 40px) scale(1.1); } }
@keyframes float2 { from { transform: translate(0,0) scale(1); } to { transform: translate(-30px, 30px) scale(1.08); } }

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(30,58,95,.5), transparent);
}

/* Grid pattern overlay */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
  background-size: 60px 60px;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 76px;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(200,76,71,.2);
  border: 1px solid rgba(200,76,71,.4);
  color: #ff9e9e;
  font-size: .82rem;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 8px 18px;
  border-radius: 50px;
  margin-bottom: 28px;
  animation: fadeInDown .7s ease both;
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.15;
  margin-bottom: 24px;
  animation: fadeInUp .8s .15s ease both;
}

.hero-highlight {
  color: var(--red);
  display: block;
}

.hero-subtitle {
  font-size: clamp(1rem, 1.8vw, 1.15rem);
  color: rgba(255,255,255,.8);
  max-width: 620px;
  margin-bottom: 40px;
  animation: fadeInUp .8s .3s ease both;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  animation: fadeInUp .8s .45s ease both;
}

.hero-scroll-indicator {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-dot {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(255,255,255,.5);
  border-radius: 50%;
  animation: scrollBounce 2s infinite;
  margin: 0 auto;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateY(0); opacity: .5; }
  50%       { transform: translateY(8px); opacity: 1; }
}

@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); }
}

/* ============================================================
   STATS BAR
============================================================ */
.stats-bar {
  background: var(--blue);
  padding: 40px 0;
}

.stats-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.stat-item {
  flex: 1;
  min-width: 160px;
  text-align: center;
  padding: 16px 24px;
  color: var(--white);
}

.stat-number {
  display: block;
  font-family: var(--font-head);
  font-size: 2.8rem;
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.stat-suffix {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--red);
}

.stat-label {
  display: block;
  font-size: .82rem;
  color: rgba(255,255,255,.65);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-top: 6px;
}

.stat-icon-cert {
  display: block;
  font-size: 2.2rem;
  color: var(--red);
  margin-bottom: 6px;
}

.stat-divider {
  width: 1px;
  height: 60px;
  background: rgba(255,255,255,.15);
  flex-shrink: 0;
}

/* ============================================================
   ABOUT
============================================================ */
.about { background: var(--white); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about-lead {
  font-size: 1.1rem;
  color: var(--gray-800);
  margin-bottom: 20px;
  line-height: 1.8;
}

.about-body {
  color: var(--gray-600);
  margin-bottom: 36px;
  line-height: 1.8;
}

.about-points {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-point {
  display: flex;
  gap: 18px;
  align-items: flex-start;
}

.about-point-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  background: linear-gradient(135deg, var(--red), #e8605b);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.1rem;
  box-shadow: 0 4px 16px rgba(200,76,71,.3);
}

.about-point-text h4 {
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 4px;
}

.about-point-text p {
  font-size: .9rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* About Visual */
.about-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}

.about-visual-card {
  background: var(--blue);
  border-radius: var(--radius-lg);
  padding: 40px 36px;
  width: 100%;
  max-width: 380px;
  position: relative;
  z-index: 2;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.about-visual-card::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 200px; height: 200px;
  background: rgba(255,255,255,.05);
  border-radius: 50%;
}

.visual-icon-wrap {
  width: 72px;
  height: 72px;
  background: var(--red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  color: var(--white);
  margin-bottom: 24px;
  box-shadow: 0 8px 24px rgba(200,76,71,.4);
}

.visual-badge {
  display: inline-block;
  background: rgba(200,76,71,.2);
  color: #ff9e9e;
  font-size: .78rem;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 5px 14px;
  border-radius: 50px;
  margin-bottom: 24px;
}

.visual-lines { display: flex; flex-direction: column; gap: 0; }

.visual-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
  gap: 16px;
}
.visual-line:last-child { border-bottom: none; }

.vl-label {
  font-size: .82rem;
  color: rgba(255,255,255,.55);
  font-weight: 500;
  white-space: nowrap;
}

.vl-value {
  font-size: .88rem;
  color: var(--white);
  font-weight: 600;
  text-align: right;
}

.about-deco-circle {
  position: absolute;
  border-radius: 50%;
  z-index: 1;
}

.about-deco-1 {
  width: 280px; height: 280px;
  border: 2px dashed rgba(200,76,71,.2);
  top: -40px; right: -40px;
  animation: spin 30s linear infinite;
}

.about-deco-2 {
  width: 180px; height: 180px;
  background: rgba(30,58,95,.06);
  bottom: -30px; left: -30px;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   FIRE ALARM SYSTEMS
============================================================ */
.fire-alarm {
  position: relative;
  padding: 64px 0;
}

.fire-alarm-bg-layer {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 60%, #0a1e36 100%);
  z-index: 0;
}

.fire-alarm .container { position: relative; z-index: 1; }

.fas-features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.fas-feature-card {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  animation-delay: var(--delay, 0s);
}

.fas-feature-card:hover {
  background: rgba(255,255,255,.1);
  border-color: rgba(200,76,71,.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,.3);
}

.fas-feature-icon {
  width: 54px;
  height: 54px;
  background: linear-gradient(135deg, var(--red), #e8605b);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  color: var(--white);
  margin-bottom: 20px;
  box-shadow: 0 4px 16px rgba(200,76,71,.35);
}

.fas-feature-card h3 {
  font-family: var(--font-head);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 12px;
}

.fas-feature-card p {
  font-size: .9rem;
  color: rgba(255,255,255,.7);
  line-height: 1.7;
}

/* CTA Block */
.fas-cta-block {
  display: flex;
  align-items: center;
  gap: 28px;
  background: rgba(200,76,71,.15);
  border: 1px solid rgba(200,76,71,.35);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  flex-wrap: wrap;
}

.fas-cta-icon {
  font-size: 2.5rem;
  color: var(--red);
  flex-shrink: 0;
}

.fas-cta-text { flex: 1; min-width: 200px; }

.fas-cta-text h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 6px;
}

.fas-cta-text p {
  font-size: .9rem;
  color: rgba(255,255,255,.7);
}

/* ============================================================
   ZETA
============================================================ */
.zeta { background: var(--gray-50); }

.zeta-intro {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 40px;
}

.zeta-logo-wrap {
  text-align: center;
}

.zeta-logo-img {
  max-width: 260px;
  height: auto;
  margin: 0 auto 24px;
  display: block;
  object-fit: contain;
}

.zeta-badge-exclusive {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: var(--white);
  font-size: .82rem;
  font-weight: 700;
  padding: 10px 20px;
  border-radius: 50px;
  letter-spacing: .5px;
}

.zeta-badge-exclusive i { color: #ffc107; }

.zeta-headline .section-title { text-align: left; }
.zeta-headline .section-divider { margin: 0 0 20px; }
.zeta-headline .section-tag { text-align: left; display: inline-block; }

.zeta-headline p {
  color: var(--gray-600);
  margin-bottom: 16px;
  line-height: 1.8;
}

.zeta-advantages {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.zeta-adv-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  transition: var(--transition);
}

.zeta-adv-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(30,58,95,.15);
}

.zeta-adv-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--blue), var(--blue-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--white);
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(30,58,95,.25);
}

.zeta-adv-card h4 {
  font-family: var(--font-head);
  font-size: .95rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 10px;
}

.zeta-adv-card p {
  font-size: .87rem;
  color: var(--gray-600);
  line-height: 1.65;
}

/* Why Block */
.zeta-why-block {
  background: var(--blue);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  gap: 48px;
  flex-wrap: wrap;
}

.zeta-why-content { flex: 1; min-width: 260px; }

.zeta-why-content h3 {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}

.zeta-why-mhi { color: var(--red); }
.zeta-why-zeta { color: #7eb8f7; }

.zeta-why-content p {
  color: rgba(255,255,255,.75);
  line-height: 1.8;
  font-size: .95rem;
}

.zeta-certifications {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  color: var(--white);
  padding: 12px 22px;
  border-radius: 50px;
  font-size: .88rem;
  font-weight: 600;
  white-space: nowrap;
}

.cert-badge i { color: var(--red); font-size: 1rem; }

.cert-logo {
  background: var(--white);
  border-radius: var(--radius);
  padding: 8px 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.cert-logo img {
  height: 38px;
  width: auto;
  object-fit: contain;
}

/* Zeta product showcase */
.zeta-products { margin: 48px 0; }

.zeta-products-label {
  text-align: center;
  font-size: .8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--gray-600);
  margin-bottom: 24px;
}

.zeta-products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.zeta-product-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 28px 20px 18px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--gray-200);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.zeta-product-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.zeta-product-card img {
  height: 110px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}
.zeta-product-card span {
  font-size: .82rem;
  font-weight: 600;
  color: var(--blue);
  text-align: center;
  line-height: 1.4;
}

/* Fire Alarm product spotlight */
.fas-product-highlight {
  display: flex;
  align-items: center;
  gap: 40px;
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 32px 40px;
  margin-bottom: 48px;
}
.fas-product-img {
  flex-shrink: 0;
  width: 150px;
  height: 150px;
  background: var(--white);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}
.fas-product-img img { width: 100%; height: 100%; object-fit: contain; }
.fas-product-text h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 10px;
}
.fas-product-text p { color: rgba(255,255,255,.75); font-size: .92rem; line-height: 1.7; }

@media (max-width: 768px) {
  .zeta-products-grid { grid-template-columns: repeat(2, 1fr); }
  .fas-product-highlight { flex-direction: column; text-align: center; padding: 28px 24px; }
  .fas-product-img { width: 120px; height: 120px; }
}

/* ============================================================
   SERVICES
============================================================ */
.services { background: var(--white); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  position: relative;
  transition: var(--transition);
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--blue));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}

.service-card:hover::before { transform: scaleX(1); }

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(200,76,71,.1), rgba(200,76,71,.05));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--red);
  margin-bottom: 16px;
  transition: var(--transition);
}

.service-card:hover .service-card-icon {
  background: var(--red);
  color: var(--white);
}

.service-card-num {
  font-family: var(--font-head);
  font-size: .75rem;
  font-weight: 700;
  color: var(--gray-400);
  letter-spacing: 2px;
  margin-bottom: 10px;
}

.service-card h3 {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 12px;
}

.service-card p {
  font-size: .9rem;
  color: var(--gray-600);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.service-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: var(--gray-600);
}

.service-list li i {
  color: var(--red);
  font-size: .75rem;
  flex-shrink: 0;
}

/* ============================================================
   PROJECTS
============================================================ */
.projects {
  position: relative;
  padding: 64px 0;
}

.projects-bg-layer {
  position: absolute;
  inset: 0;
  background: linear-gradient(160deg, #0f2137 0%, var(--blue) 50%, #1a3a60 100%);
  z-index: 0;
}

.projects .container { position: relative; z-index: 1; }

/* Filter Tabs */
.project-filters {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.filter-btn {
  padding: 10px 22px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  color: rgba(255,255,255,.7);
  border: 1px solid rgba(255,255,255,.2);
  background: transparent;
  transition: var(--transition);
}

.filter-btn:hover {
  color: var(--white);
  border-color: rgba(255,255,255,.5);
}

.filter-btn.active {
  background: var(--red);
  color: var(--white);
  border-color: var(--red);
  box-shadow: 0 4px 16px rgba(200,76,71,.4);
}

/* Projects Grid */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.project-card {
  background: rgba(255,255,255,.07);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.project-card:hover {
  background: rgba(255,255,255,.12);
  border-color: rgba(200,76,71,.4);
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0,0,0,.3);
}

.project-card.hidden { display: none; }

.project-card-icon {
  width: 42px;
  height: 42px;
  background: rgba(200,76,71,.2);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  color: var(--red);
  flex-shrink: 0;
}

.project-type {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: rgba(200,76,71,.9);
  margin-bottom: 4px;
  cursor: pointer;
  border-bottom: 1px dashed rgba(200,76,71,.4);
  transition: color .2s, border-color .2s;
}

.project-type:hover {
  color: var(--white);
  border-color: rgba(255,255,255,.5);
}

.project-card h4 {
  font-family: var(--font-head);
  font-size: .92rem;
  font-weight: 600;
  color: var(--white);
  line-height: 1.35;
  margin-bottom: 6px;
}

.project-loc {
  font-size: .8rem;
  color: rgba(255,255,255,.55);
  display: flex;
  align-items: center;
  gap: 5px;
  margin-bottom: 4px;
}

.project-loc i { font-size: .7rem; color: var(--red); }

.project-sys {
  font-size: .78rem;
  color: rgba(255,255,255,.45);
  line-height: 1.4;
}

.projects-cta {
  text-align: center;
}

.projects-cta p {
  color: rgba(255,255,255,.65);
  margin-bottom: 20px;
  font-size: .95rem;
}

/* ============================================================
   CONTACT
============================================================ */
.contact { background: var(--gray-50); }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 64px;
  align-items: start;
}

/* Contact Info */
.contact-info h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 32px;
}

.contact-item {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 24px;
}

.contact-item-icon {
  width: 46px;
  height: 46px;
  min-width: 46px;
  background: var(--blue);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--white);
}

.contact-item-label {
  display: block;
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 4px;
}

.contact-item-value {
  display: block;
  font-size: .92rem;
  font-weight: 500;
  color: var(--blue);
  transition: color .2s;
}

a.contact-item-value:hover { color: var(--red); }

.map-placeholder {
  margin-top: 32px;
  background: var(--blue);
  border-radius: var(--radius-lg);
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.map-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 40% 60%, rgba(200,76,71,.15) 0%, transparent 60%),
    linear-gradient(135deg, rgba(255,255,255,.05) 0%, transparent 100%);
}

.map-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.map-inner i {
  font-size: 2.4rem;
  color: var(--red);
  margin-bottom: 10px;
}

.map-inner p {
  color: rgba(255,255,255,.8);
  font-size: .9rem;
  margin-bottom: 12px;
}

.map-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--white);
  font-size: .82rem;
  font-weight: 600;
  background: rgba(255,255,255,.12);
  padding: 8px 16px;
  border-radius: 50px;
  border: 1px solid rgba(255,255,255,.2);
  transition: var(--transition);
}

.map-link:hover {
  background: var(--red);
  border-color: var(--red);
}

/* Contact Form */
.contact-form-wrap {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--blue);
  margin-bottom: 28px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
  margin-bottom: 20px;
}

.form-group label {
  font-size: .85rem;
  font-weight: 600;
  color: var(--gray-800);
}

.req { color: var(--red); }

.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--black);
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  padding: 12px 16px;
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  width: 100%;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(30,58,95,.1);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 16px;
  font-size: 1rem;
  border-radius: 8px;
  margin-top: 4px;
}

.form-success {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(34,197,94,.1);
  border: 1px solid rgba(34,197,94,.3);
  border-radius: 8px;
  padding: 14px 18px;
  margin-top: 16px;
  color: #166534;
  font-weight: 600;
  font-size: .9rem;
}

.form-success i { color: #22c55e; font-size: 1.1rem; }

/* ============================================================
   FOOTER
============================================================ */
.footer { background: var(--blue-dark); }

.footer-top { padding: 48px 0 32px; }

.footer-top-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 48px;
}

.footer-logo-img {
  height: 128px;
  width: auto;
  object-fit: contain;
  margin-bottom: 20px;
  background: var(--white);
  border-radius: 8px;
  padding: 6px 12px;
}

.footer-brand-desc {
  font-size: .88rem;
  color: rgba(255,255,255,.6);
  line-height: 1.7;
  margin-bottom: 28px;
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.social-link {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.65);
  font-size: .85rem;
  transition: var(--transition);
}

.social-link:hover {
  background: var(--red);
  border-color: var(--red);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-col-title {
  font-family: var(--font-head);
  font-size: .9rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: .5px;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 12px;
}

.footer-col-title::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 30px; height: 2px;
  background: var(--red);
  border-radius: 1px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: .88rem;
  color: rgba(255,255,255,.6);
  transition: color .2s;
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-links a:hover { color: var(--white); padding-left: 4px; }

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-contact-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.footer-contact-list i {
  color: var(--red);
  font-size: .9rem;
  margin-top: 3px;
  flex-shrink: 0;
}

.footer-contact-list a,
.footer-contact-list span {
  font-size: .88rem;
  color: rgba(255,255,255,.65);
  transition: color .2s;
}

.footer-contact-list a:hover { color: var(--white); }

/* Footer Bottom */
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 24px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: .83rem;
  color: rgba(255,255,255,.45);
}

.footer-partner-note {
  display: flex;
  align-items: center;
  gap: 6px;
}

.footer-zeta-logo {
  height: 22px;
  width: auto;
  display: inline-block;
  vertical-align: middle;
  background: var(--white);
  border-radius: 4px;
  padding: 2px 6px;
}

/* ============================================================
   BACK TO TOP
============================================================ */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  background: var(--red);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: .9rem;
  box-shadow: 0 4px 20px rgba(200,76,71,.5);
  transition: var(--transition);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--red-dark);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(200,76,71,.55);
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
============================================================ */
/* Elements are ALWAYS visible by default (no JS required) */
.reveal-up,
.reveal-left,
.reveal-right {
  transition: opacity .7s ease, transform .7s ease;
  transition-delay: var(--delay, 0s);
}

/* Only hide elements when JS has loaded and confirmed working */
.js-ready .reveal-up    { opacity: 0; transform: translateY(40px); }
.js-ready .reveal-left  { opacity: 0; transform: translateX(-40px); }
.js-ready .reveal-right { opacity: 0; transform: translateX(40px); }

.js-ready .reveal-up.revealed,
.js-ready .reveal-left.revealed,
.js-ready .reveal-right.revealed {
  opacity: 1;
  transform: translate(0);
}

/* ============================================================
   RESPONSIVE
============================================================ */

/* Tablet (≤ 1024px) */
@media (max-width: 1024px) {
  .about-grid       { grid-template-columns: 1fr; gap: 48px; }
  .about-visual     { display: none; }
  .zeta-intro       { grid-template-columns: 1fr; gap: 40px; }
  .zeta-logo-wrap   { text-align: left; }
  .zeta-logo-img    { margin: 0 0 16px; max-width: 200px; }
  .zeta-advantages  { grid-template-columns: repeat(2, 1fr); }
  .services-grid    { grid-template-columns: repeat(2, 1fr); }
  .projects-grid    { grid-template-columns: repeat(3, 1fr); }
  .contact-grid     { grid-template-columns: 1fr; }
  .footer-top-grid  { grid-template-columns: 1fr 1fr; gap: 36px; }
  .fas-features-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* Mobile (≤ 768px) */
@media (max-width: 768px) {
  .section { padding: 48px 0; }

  /* Nav */
  .hamburger { display: flex; }

  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    background: var(--blue-dark);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 100px 32px 48px;
    gap: 6px;
    transition: right .35s cubic-bezier(.25,.46,.45,.94);
    z-index: 1000;
    box-shadow: -8px 0 48px rgba(0,0,0,.4);
  }

  .nav-links.open { right: 0; }

  .nav-link {
    color: rgba(255,255,255,.85);
    padding: 12px 0;
    width: 100%;
    font-size: 1rem;
  }

  .nav-link.nav-cta {
    margin-top: 16px;
    text-align: center;
    justify-content: center;
  }

  .nav-link.lang-switch {
    margin-top: 8px;
    border-color: rgba(255,255,255,.4);
    display: inline-block;
    width: auto;
  }

  /* Hero */
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* Stats */
  .stats-grid { flex-direction: column; gap: 0; }
  .stat-divider { width: 60px; height: 1px; margin: 0 auto; }

  /* FAS */
  .fas-features-grid { grid-template-columns: 1fr; }
  .fas-cta-block { flex-direction: column; text-align: center; }

  /* Zeta */
  .zeta-advantages { grid-template-columns: 1fr; }
  .zeta-why-block  { flex-direction: column; padding: 36px 28px; gap: 28px; }

  /* Services */
  .services-grid { grid-template-columns: 1fr; }

  /* Projects */
  .projects-grid { grid-template-columns: repeat(2, 1fr); }

  /* Contact */
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 32px 24px; }

  /* Footer */
  .footer-top-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand-desc { max-width: 100%; }

  /* Back to top */
  .back-to-top { bottom: 20px; right: 20px; }
}

/* Small Mobile (≤ 480px) */
@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .hero-badge    { font-size: .75rem; }
}