:root {
  --althier-blue: #165080;
  --althier-blue-dark: #0f3657;
  --althier-blue-soft: #176fb4;
  --althier-gray: #555759;
  --althier-light: #eef5fa;
  --althier-line: #dbe6ee;
  --althier-text: #172635;
  --althier-white: #ffffff;
  --shadow: 0 18px 45px rgba(15, 54, 87, .14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--althier-text);
  font-family: "Roboto", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
  background: #fff;
}
body::selection { background: rgba(23, 111, 180, .2); }
a { color: var(--althier-blue); text-decoration: none; }
a:hover { color: var(--althier-blue-soft); }
h1, h2, h3, h4, .navbar-brand { font-family: "Montserrat", system-ui, sans-serif; }
h1 { font-weight: 800; letter-spacing: -.04em; line-height: 1.05; }
h2 { font-weight: 800; letter-spacing: -.03em; color: var(--althier-blue-dark); }
h3 { font-weight: 700; color: var(--althier-blue-dark); }
.skip-link {
  position: absolute; left: -999px; top: 0; background: #fff; color: var(--althier-blue-dark); padding: .8rem 1rem; z-index: 9999;
}
.skip-link:focus { left: 0; }

.navbar-althier {
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  box-shadow: 0 8px 24px rgba(15,54,87,.08);
}
.navbar-althier .navbar-brand img { height: 55px; width: auto; display: block; }
.navbar-althier .nav-link {
  font-weight: 700;
  color: var(--althier-blue-dark);
  padding-inline: .8rem;
}
.navbar-althier .nav-link:hover { color: var(--althier-blue-soft); }

.btn-primary-althier {
  --bs-btn-bg: var(--althier-blue);
  --bs-btn-border-color: var(--althier-blue);
  --bs-btn-hover-bg: var(--althier-blue-dark);
  --bs-btn-hover-border-color: var(--althier-blue-dark);
  --bs-btn-color: #fff;
  border-radius: 999px;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(22,80,128,.22);
}
.btn-outline-althier {
  --bs-btn-color: var(--althier-blue);
  --bs-btn-border-color: var(--althier-blue);
  --bs-btn-hover-bg: var(--althier-blue);
  --bs-btn-hover-border-color: var(--althier-blue);
  --bs-btn-hover-color: #fff;
  border-radius: 999px;
  font-weight: 800;
}
.btn-outline-light { border-radius: 999px; font-weight: 800; }

.hero-section {
  position: relative;
  min-height: 760px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: 96px;
}
.hero-bg {
  position: absolute; inset: 0;
  background-image: url('../img/hero-obra.webp');
  background-size: cover;
  background-position: center;
  transform: scale(1.02);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(90deg, rgba(7,28,46,.92), rgba(22,80,128,.78) 45%, rgba(15,54,87,.42));
}
.hero-content { position: relative; z-index: 1; color: #fff; padding-block: 5rem; }
.hero-content h1 { font-size: clamp(2.6rem, 5vw, 5.2rem); max-width: 900px; }
.hero-content .lead { font-size: clamp(1.05rem, 1.6vw, 1.28rem); max-width: 760px; color: rgba(255,255,255,.88); }
.eyebrow, .section-kicker {
  display: inline-flex; align-items: center; gap: .5rem;
  font-family: "Montserrat", system-ui, sans-serif;
  text-transform: uppercase;
  letter-spacing: .12em;
  font-weight: 800;
  font-size: .78rem;
  color: var(--althier-blue-soft);
  margin-bottom: .8rem;
}
.eyebrow { color: #fff; background: rgba(255,255,255,.13); padding: .55rem .8rem; border-radius: 999px; }
.section-kicker::before, .eyebrow::before {
  content: ""; width: 28px; height: 2px; background: currentColor; display: inline-block;
}
.section-kicker.light { color: #9ed3fb; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 1rem; margin-top: 2rem; }
.hero-card {
  background: rgba(255,255,255,.96);
  color: var(--althier-text);
  border-radius: 28px;
  padding: 1.6rem;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,.65);
}
.hero-logo { width: 100%; border-radius: 18px; margin-bottom: 1.2rem; }
.stats-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: .8rem; }
.stats-grid div { background: var(--althier-light); border-radius: 18px; padding: 1rem; }
.stats-grid strong { display: block; color: var(--althier-blue); font-family: "Montserrat", sans-serif; font-size: 1.35rem; line-height: 1.1; }
.stats-grid span { display: block; color: var(--althier-gray); font-size: .92rem; margin-top: .35rem; }

.section-padding { padding: 6rem 0; }
.bg-soft { background: linear-gradient(180deg, var(--althier-light), #fff); }
.bg-dark-blue { background: linear-gradient(135deg, var(--althier-blue-dark), #061c2d); }
.section-heading { max-width: 780px; margin: 0 auto 3rem; }
.section-heading h2 { font-size: clamp(2rem, 4vw, 3.2rem); }
.section-heading p { font-size: 1.08rem; color: var(--althier-gray); }
.text-white h2, .text-white p { color: #fff; }

.info-panel, .quote-form, .contact-card, .contact-detail, .service-card, .contact-mini-card {
  background: #fff;
  border: 1px solid var(--althier-line);
  box-shadow: var(--shadow);
}
.info-panel { border-radius: 28px; padding: 2rem; }
.info-panel h3 { margin-bottom: 1.4rem; }
.info-panel dt { color: var(--althier-blue); font-weight: 800; }
.info-panel dd { color: var(--althier-gray); }

.service-card {
  border-radius: 24px;
  padding: 1.6rem;
  transition: transform .18s ease, box-shadow .18s ease;
}
.service-card:hover { transform: translateY(-6px); box-shadow: 0 22px 55px rgba(15,54,87,.18); }
.service-icon {
  width: 48px; height: 48px; border-radius: 16px;
  display: grid; place-items: center;
  color: #fff; background: var(--althier-blue);
  font-family: "Montserrat", sans-serif; font-weight: 800;
  margin-bottom: 1.2rem;
}
.service-card h3 { font-size: 1.05rem; margin-bottom: .7rem; }
.service-card p { color: var(--althier-gray); margin-bottom: 0; }

.experience-section { background: #fff; }
.disclaimer-box {
  background: var(--althier-light);
  border-left: 5px solid var(--althier-blue-soft);
  padding: 1rem 1.2rem;
  border-radius: 16px;
  color: var(--althier-gray);
  margin-top: 1.5rem;
}
.timeline-list { display: grid; gap: 1rem; }
.timeline-list article {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 1.2rem;
  padding: 1.4rem;
  border: 1px solid var(--althier-line);
  border-radius: 24px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(15,54,87,.06);
}
.timeline-list span {
  width: 52px; height: 52px; border-radius: 18px;
  background: var(--althier-blue); color: #fff;
  display: grid; place-items: center;
  font-family: "Montserrat", sans-serif; font-weight: 800;
}
.timeline-list h3 { font-size: 1.18rem; margin-bottom: .35rem; }
.timeline-list p { color: var(--althier-gray); margin-bottom: 0; }

.gallery-filters {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: .7rem; margin-bottom: 2rem;
}
.gallery-filters button {
  border: 1px solid rgba(255,255,255,.28);
  color: #fff;
  background: rgba(255,255,255,.08);
  padding: .55rem .9rem;
  border-radius: 999px;
  font-weight: 800;
}
.gallery-filters button.active, .gallery-filters button:hover {
  background: #fff; color: var(--althier-blue-dark);
}
.gallery-card {
  position: relative;
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 22px;
  overflow: hidden;
  background: #000;
  box-shadow: 0 18px 45px rgba(0,0,0,.22);
  cursor: pointer;
}
.gallery-card img { display: block; width: 100%; aspect-ratio: 4 / 3; object-fit: cover; transition: transform .35s ease, opacity .35s ease; }
.gallery-card:hover img { transform: scale(1.06); opacity: .82; }
.gallery-overlay {
  position: absolute; left: 0; right: 0; bottom: 0;
  padding: 2.2rem 1rem 1rem;
  background: linear-gradient(180deg, transparent, rgba(0,0,0,.82));
  color: #fff;
  text-align: left;
}
.gallery-overlay strong { display: block; font-family: "Montserrat", sans-serif; font-size: 1.02rem; }
.gallery-overlay small { display: block; color: rgba(255,255,255,.82); }
.gallery-item.is-hidden { display: none; }

.quote-section { background: linear-gradient(180deg, #fff, var(--althier-light)); }
.quote-form { border-radius: 28px; padding: 2rem; }
.form-control, .form-select { border-radius: 14px; padding: .8rem .95rem; border-color: var(--althier-line); }
.form-control:focus, .form-select:focus { border-color: var(--althier-blue-soft); box-shadow: 0 0 0 .25rem rgba(23,111,180,.16); }
.form-label { font-weight: 800; color: var(--althier-blue-dark); }
.contact-mini-card { border-radius: 24px; padding: 1.4rem; margin-top: 1.5rem; }
.contact-mini-card p { margin-bottom: .5rem; }

.contact-section { background: #fff; }
.contact-card { border-radius: 28px; padding: 2rem; }
.contact-detail { border-radius: 24px; padding: 1.4rem; height: 100%; }
.contact-detail span { display: block; color: var(--althier-gray); font-weight: 700; font-size: .92rem; margin-bottom: .35rem; }
.contact-detail a, .contact-detail p { color: var(--althier-blue-dark); font-weight: 800; margin: 0; }

.site-footer { background: #061c2d; color: rgba(255,255,255,.78); padding: 2rem 0; }
.footer-logo { max-width: 250px; background: #fff; border-radius: 16px; padding: .5rem; }
.footer-note { color: rgba(255,255,255,.55); font-size: .92rem; }
.whatsapp-float {
  position: fixed; right: 22px; bottom: 22px; z-index: 1000;
  background: #1f9d55; color: #fff; border-radius: 999px;
  padding: .9rem 1.1rem; font-weight: 900; box-shadow: 0 16px 32px rgba(0,0,0,.25);
}
.whatsapp-float:hover { color: #fff; transform: translateY(-2px); }
.modal-image { width: 100%; display: block; max-height: 78vh; object-fit: contain; background: #0d0d0d; }
.modal-subtitle { color: var(--althier-gray); }

@media (max-width: 991px) {
  .hero-section { min-height: auto; }
  .hero-content { padding-block: 4rem; }
  .navbar-althier .navbar-brand img { height: 48px; }
  .section-padding { padding: 4.5rem 0; }
}
@media (max-width: 575px) {
  .stats-grid { grid-template-columns: 1fr; }
  .timeline-list article { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; }
  .quote-form { padding: 1.2rem; }
  .footer-logo { max-width: 210px; }
}