:root {
  --tz-blue: #1e4e9c;
  --tz-blue-dark: #153a75;
  --tz-blue-soft: #eef3fb;
  --tz-gold: #f2b705;
  --tz-gold-dark: #d99e00;
  --tz-text: #1f2937;
  --tz-muted: #6b7280;
  --bs-primary: var(--tz-blue);
  --bs-primary-rgb: 30, 78, 156;
  --bs-link-color: var(--tz-blue);
  --bs-link-hover-color: var(--tz-blue-dark);
}

html { scroll-behavior: smooth; scroll-padding-top: 80px; }

body {
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  color: var(--tz-text);
  line-height: 1.7;
}

h1, h2, h3, h4, h5, h6 { font-weight: 700; letter-spacing: -0.01em; }

.btn-primary {
  --bs-btn-bg: var(--tz-blue);
  --bs-btn-border-color: var(--tz-blue);
  --bs-btn-hover-bg: var(--tz-blue-dark);
  --bs-btn-hover-border-color: var(--tz-blue-dark);
  --bs-btn-active-bg: var(--tz-blue-dark);
  --bs-btn-active-border-color: var(--tz-blue-dark);
  font-weight: 600;
}
.btn-outline-primary {
  --bs-btn-color: var(--tz-blue);
  --bs-btn-border-color: var(--tz-blue);
  --bs-btn-hover-bg: var(--tz-blue);
  --bs-btn-hover-border-color: var(--tz-blue);
  --bs-btn-active-bg: var(--tz-blue);
  --bs-btn-active-border-color: var(--tz-blue);
  font-weight: 600;
}

/* Navbar */
.navbar { padding: .6rem 0; transition: padding .2s; }
.navbar .brand-text { font-weight: 800; color: var(--tz-blue); font-size: 1.1rem; letter-spacing: .02em; }
.navbar .brand-text small { font-weight: 600; color: var(--tz-muted); font-size: .7em; }
.navbar .nav-link { font-weight: 500; color: var(--tz-text); padding: .5rem .85rem; }
.navbar .nav-link:hover, .navbar .nav-link.active { color: var(--tz-blue); }

/* Hero */
.hero {
  padding: 130px 0 80px;
  background:
    radial-gradient(900px 400px at 85% 10%, rgba(242,183,5,.18), transparent 60%),
    radial-gradient(700px 400px at 5% 90%, rgba(30,78,156,.12), transparent 60%),
    linear-gradient(180deg, #f7f9fd 0%, #ffffff 100%);
}
.hero h1 { color: var(--tz-blue-dark); line-height: 1.2; }
.hero .lead { color: #4b5563; }
.badge-pill {
  display: inline-flex; align-items: center; gap: .4rem;
  background: rgba(242,183,5,.18); color: #8a6200;
  font-weight: 600; font-size: .85rem;
  padding: .35rem .9rem; border-radius: 999px;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: .5rem 1.25rem; font-size: .9rem; color: var(--tz-muted); }
.hero-tags i { color: var(--tz-blue); margin-right: .3rem; }
.hero-visual img { background: #fff; padding: .5rem; }

/* Stats */
.stats { background: var(--tz-blue); color: #fff; padding: 1.75rem 0; }
.stat-num { font-size: 2rem; font-weight: 800; color: var(--tz-gold); line-height: 1.1; }
.stat-label { font-size: .9rem; opacity: .9; }

/* Sections */
.section { padding: 80px 0; }
.section-kicker {
  display: inline-block; color: var(--tz-gold-dark); font-weight: 700;
  text-transform: uppercase; letter-spacing: .12em; font-size: .78rem; margin-bottom: .5rem;
}
.section-title { color: var(--tz-blue-dark); margin-bottom: 1.25rem; font-size: 2rem; }
.bg-primary-soft { background: var(--tz-blue-soft); }

/* Feature cards */
.feature-card {
  background: #fff; border: 1px solid #e5e9f2; border-radius: 1rem;
  padding: 1.5rem; height: 100%; transition: transform .2s, box-shadow .2s;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(30,78,156,.10); }
.feature-card i { font-size: 1.8rem; color: var(--tz-blue); }
.feature-card h5 { margin: .75rem 0 .4rem; font-size: 1.05rem; }
.feature-card p { margin: 0; font-size: .92rem; color: var(--tz-muted); }

/* Product cards */
.product-card {
  background: #fff; border-radius: 1rem; padding: 1.75rem; height: 100%;
  border: 1px solid #e5e9f2; transition: transform .2s, box-shadow .2s;
}
.product-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(30,78,156,.10); }
.product-icon {
  width: 56px; height: 56px; border-radius: 14px; display: grid; place-items: center;
  background: var(--tz-blue-soft); color: var(--tz-blue); font-size: 1.5rem; margin-bottom: 1rem;
}
.product-card h5 { font-size: 1.1rem; }
.product-card p { margin: 0; color: var(--tz-muted); font-size: .95rem; }
.capacity-box {
  background: #fff; border-left: 5px solid var(--tz-gold); border-radius: .75rem;
  padding: 1.5rem 1.75rem; box-shadow: 0 4px 20px rgba(0,0,0,.04);
}

/* Gallery */
.gallery-card {
  display: block; background: #fff; border: 1px solid #e5e9f2; border-radius: 1rem; overflow: hidden;
  text-decoration: none; color: inherit; height: 100%; transition: transform .2s, box-shadow .2s;
}
.gallery-card:hover { transform: translateY(-4px); box-shadow: 0 10px 30px rgba(30,78,156,.12); color: inherit; }
.gallery-thumb { aspect-ratio: 4 / 3; background: #f3f5f9; overflow: hidden; }
.gallery-thumb img { width: 100%; height: 100%; object-fit: cover; object-position: top; transition: transform .3s; }
.gallery-card:hover .gallery-thumb img { transform: scale(1.04); }
.gallery-info { padding: 1rem 1.15rem 1.15rem; }
.gallery-info h6 { font-size: 1rem; margin-bottom: .35rem; color: var(--tz-blue-dark); }
.gallery-info p { font-size: .88rem; color: var(--tz-muted); margin-bottom: .5rem; }
.gallery-meta { display: flex; flex-wrap: wrap; gap: .5rem; align-items: center; font-size: .85rem; }
.gallery-code { color: var(--tz-muted); }
.gallery-price { font-weight: 700; color: var(--tz-blue); background: var(--tz-blue-soft); padding: .15rem .6rem; border-radius: 999px; }

/* Lightbox */
#lightbox .modal-dialog { max-width: min(92vw, 900px); }
.lightbox-body { position: relative; text-align: center; }
.lightbox-body img { max-height: 85vh; width: auto; max-width: 100%; box-shadow: 0 20px 60px rgba(0,0,0,.5); }
.lightbox-close { position: absolute; top: -2.2rem; right: 0; opacity: .9; }
.lightbox-caption { color: #fff; margin-top: .75rem; font-size: .95rem; text-shadow: 0 1px 4px rgba(0,0,0,.6); }
#lightbox.modal { --bs-modal-bg: transparent; }
.modal-backdrop.show { opacity: .85; }

/* Certificates */
.cert-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 1rem; }
.cert-list li {
  display: flex; gap: 1.25rem; align-items: center; background: #fff;
  border: 1px solid #e5e9f2; border-radius: .9rem; padding: 1rem 1.25rem;
}
.cert-year {
  flex: 0 0 auto; background: var(--tz-blue); color: #fff; font-weight: 700;
  padding: .45rem .8rem; border-radius: .5rem; font-size: .85rem; white-space: nowrap;
}

/* Timeline */
.timeline { position: relative; max-width: 820px; margin: 0 auto; padding-left: 2rem; }
.timeline::before {
  content: ""; position: absolute; left: .55rem; top: .4rem; bottom: .4rem;
  width: 3px; background: linear-gradient(var(--tz-blue), var(--tz-gold));
  border-radius: 3px;
}
.tl-item { position: relative; padding-bottom: 1.6rem; }
.tl-item::before {
  content: ""; position: absolute; left: -2rem; top: .45rem; width: 16px; height: 16px;
  border-radius: 50%; background: #fff; border: 4px solid var(--tz-blue);
}
.tl-item:last-child { padding-bottom: 0; }
.tl-year { display: inline-block; font-weight: 800; color: var(--tz-blue-dark); margin-bottom: .2rem; }
.tl-item p { margin: 0; color: #374151; }

/* Projects */
.project-card {
  background: #fff; border: 1px solid #e5e9f2; border-radius: 1rem; padding: 2rem; height: 100%;
}
.project-head { display: flex; gap: 1rem; align-items: flex-start; margin-bottom: 1rem; }
.project-head i {
  flex: 0 0 auto; width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: rgba(242,183,5,.18); color: var(--tz-gold-dark); font-size: 1.5rem;
}
.project-head h4 { font-size: 1.2rem; margin-bottom: .15rem; }
.project-stats { margin-top: 1.25rem; padding-top: 1.25rem; border-top: 1px dashed #e5e9f2; }
.project-stats b { display: block; font-size: 1.35rem; color: var(--tz-blue); line-height: 1.2; }
.project-stats span { font-size: .78rem; color: var(--tz-muted); display: block; line-height: 1.3; }

/* Clients */
.client-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: .6rem; }
.client-grid span {
  background: #fff; border: 1px solid #e5e9f2; border-radius: 999px;
  padding: .45rem 1rem; font-size: .9rem; font-weight: 500; color: #374151;
}

/* Values */
.values { background: linear-gradient(135deg, var(--tz-blue-dark), var(--tz-blue)); color: #fff; }
.value-card { padding: 1.5rem; }
.value-card i { font-size: 2.2rem; color: var(--tz-gold); }
.value-card h5 { margin: .75rem 0 .5rem; color: var(--tz-gold); }
.value-card p { margin: 0; font-size: 1.05rem; }

/* Contact */
.contact-list { list-style: none; padding: 0; margin: 1.5rem 0 0; display: grid; gap: 1.25rem; }
.contact-list li { display: flex; gap: 1rem; align-items: flex-start; }
.contact-list i {
  flex: 0 0 auto; width: 44px; height: 44px; border-radius: 12px; display: grid; place-items: center;
  background: var(--tz-blue-soft); color: var(--tz-blue); font-size: 1.2rem;
}
.contact-list a { text-decoration: none; }
.contact-form-card {
  background: #fff; border: 1px solid #e5e9f2; border-radius: 1rem; padding: 2rem;
  box-shadow: 0 10px 30px rgba(30,78,156,.06);
}
.form-control:focus, .form-select:focus {
  border-color: var(--tz-blue); box-shadow: 0 0 0 .25rem rgba(30,78,156,.15);
}
.map-wrap { border-radius: 1rem; overflow: hidden; border: 1px solid #e5e9f2; }
.map-wrap iframe { display: block; width: 100%; height: 360px; border: 0; }

/* Footer */
.footer { background: #0f2a55; color: rgba(255,255,255,.85); padding: 2.5rem 0 1.5rem; }
.footer a { color: #fff; text-decoration: none; }
.footer a:hover { color: var(--tz-gold); }
.footer hr { border-color: rgba(255,255,255,.15); margin: 1.5rem 0 1rem; }
.footer img { background: #fff; border-radius: 50%; }

/* Back to top */
.back-to-top {
  position: fixed; right: 1.25rem; bottom: 1.25rem; width: 44px; height: 44px;
  border-radius: 50%; background: var(--tz-blue); color: #fff; display: grid; place-items: center;
  text-decoration: none; opacity: 0; visibility: hidden; transition: .25s; z-index: 1000;
  box-shadow: 0 6px 18px rgba(0,0,0,.2);
}
.back-to-top.show { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--tz-gold); color: var(--tz-blue-dark); }

/* Responsive */
@media (max-width: 991.98px) {
  .hero { padding: 110px 0 60px; }
  .section { padding: 60px 0; }
  .section-title { font-size: 1.7rem; }
  .navbar-collapse { padding: .75rem 0; }
  .navbar .nav-item .btn { margin-top: .5rem; }
}
@media (max-width: 575.98px) {
  .hero h1 { font-size: 1.85rem; }
  .stat-num { font-size: 1.6rem; }
  .project-card, .contact-form-card { padding: 1.4rem; }
}