/* ==========================================================================
   M.D. General Construction LLC — Design System (Vanilla CSS, no framework)
   ========================================================================== */

:root {
  --color-primary: #000000;
  --color-primary-dark: #000000;
  --color-primary-light: #262626;
  --color-accent: #e7ac19;
  --color-accent-dark: #c2900f;
  --color-accent-ink: #8a6508;
  --color-on-accent: #000000;
  --color-light: #f8f8f8;
  --color-white: #ffffff;
  --color-gray-100: #f2f2f2;
  --color-gray-300: #dcdcdc;
  --color-gray-500: #8a8a8a;
  --color-gray-700: #4d4d4d;
  --color-text: #181818;

  --font-heading: "Poppins", "Segoe UI", Arial, sans-serif;
  --font-body: "Inter", "Segoe UI", Arial, sans-serif;

  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.18);

  --container-width: 1240px;
  --transition: 0.25s ease;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body, h1, h2, h3, h4, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font: inherit; color: inherit; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

body.nav-open { overflow: hidden; }

h1, h2, h3, h4 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.25;
  font-weight: 700;
}

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

section { position: relative; }

.section-pad { padding: 100px 0; }
@media (max-width: 768px) { .section-pad { padding: 64px 0; } }

.section-head {
  max-width: 680px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-ink);
  margin-bottom: 12px;
}
.section-tag::before {
  content: "";
  width: 28px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section-head h2 { font-size: clamp(28px, 3.6vw, 42px); margin-bottom: 14px; }
.section-head p { color: var(--color-gray-700); font-size: 17px; }
.section-head.align-left { text-align: left; margin-left: 0; }

.bg-light { background: var(--color-light); }
.bg-primary { background: var(--color-primary); color: var(--color-white); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 16px 32px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.02em;
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-on-accent);
  box-shadow: 0 8px 20px rgba(231, 172, 25, 0.35);
}
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-3px); box-shadow: 0 14px 28px rgba(231, 172, 25, 0.4); color: var(--color-on-accent); }
.btn-outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.5);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.12); border-color: var(--color-white); transform: translateY(-3px); }
.btn-outline-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-gray-300);
}
.btn-outline-dark:hover { border-color: var(--color-accent); color: var(--color-accent); transform: translateY(-3px); }
.btn-block { width: 100%; }
.btn-sm { padding: 10px 16px; font-size: 13.5px; white-space: nowrap; }

/* ---------- Skip link ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 12px 20px;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }

/* ---------- Topbar ---------- */
.topbar {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 13.5px;
  padding: 9px 0;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar-left, .topbar-right { display: flex; align-items: center; gap: 22px; flex-wrap: wrap; }
.topbar i { color: var(--color-accent); margin-right: 6px; }
.topbar-social { display: flex; gap: 12px; }
.topbar-social a {
  width: 26px; height: 26px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  font-size: 12px;
  transition: background var(--transition), color var(--transition);
}
.topbar-social a:hover { background: var(--color-accent); color: var(--color-on-accent); }

/* ---------- Header / Nav ---------- */
.site-header { position: sticky; top: 0; z-index: 500; background: transparent; }
.navbar {
  background: rgba(0, 0, 0, 0);
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
  padding: 18px 0;
}
.site-header.is-scrolled .navbar {
  background: var(--color-white);
  box-shadow: var(--shadow-md);
  padding: 12px 0;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; gap: 12px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-logo-img {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: #fff;
  padding: 2px;
  box-shadow: var(--shadow-sm);
  flex-shrink: 0;
  object-fit: cover;
}
.brand-text { line-height: 1.15; }
.brand-name {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 20px;
  color: var(--color-white);
  transition: color var(--transition);
  letter-spacing: 0.01em;
}
.brand-tagline {
  font-size: 11px;
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 600;
}
.site-header.is-scrolled .brand-name { color: var(--color-primary); }

.nav-menu { display: flex; align-items: center; gap: 0; }
.nav-menu a {
  display: block;
  padding: 9px 11px;
  font-weight: 600;
  font-size: 13.5px;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.9);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.site-header.is-scrolled .nav-menu a { color: var(--color-text); }
.nav-menu a:hover, .nav-menu a.is-active { color: var(--color-accent); }
.nav-menu .lang-switch { display: none; }
.nav-mobile-cta { display: none; }

.header-actions { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.lang-switch {
  display: flex;
  flex-shrink: 0;
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  border-radius: 20px;
  overflow: hidden;
}
.site-header.is-scrolled .lang-switch { border-color: var(--color-gray-300); }
.lang-btn {
  padding: 6px 13px;
  font-size: 13px;
  font-weight: 700;
  color: rgba(255, 255, 255, 0.85);
  transition: background var(--transition), color var(--transition);
}
.site-header.is-scrolled .lang-btn { color: var(--color-gray-700); }
.lang-btn.is-active { background: var(--color-accent); color: var(--color-on-accent); }

.header-phone { display: flex; align-items: center; gap: 8px; color: var(--color-white); white-space: nowrap; }
.site-header.is-scrolled .header-phone { color: var(--color-primary); }
.header-phone-icon {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-on-accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 13px;
}
.header-phone-text { line-height: 1.2; }
.header-phone-label { display: none; }
.header-phone-number { font-weight: 700; font-size: 14px; white-space: nowrap; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 34px; height: 34px;
  align-items: center;
  justify-content: center;
}
.nav-toggle span {
  width: 24px; height: 2.5px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}
.site-header.is-scrolled .nav-toggle span { background: var(--color-primary); }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(120deg, rgba(0, 0, 0, 0.92) 15%, rgba(0, 0, 0, 0.68) 60%, rgba(0, 0, 0, 0.5) 100%), url("../../img/banner/banner-principal.jpg") center/cover no-repeat;
  margin-top: -86px;
  padding-top: 86px;
  color: var(--color-white);
}
.hero-content { max-width: 700px; padding: 90px 0 70px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.25);
  padding: 9px 18px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-badge i { color: var(--color-accent); }
.hero h1 { font-size: clamp(34px, 5vw, 58px); color: var(--color-white); margin-bottom: 20px; }
.hero p { font-size: 18px; color: rgba(255, 255, 255, 0.88); max-width: 560px; margin-bottom: 36px; }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.hero-scroll { display: inline-flex; align-items: center; gap: 10px; font-size: 13px; color: rgba(255, 255, 255, 0.75); }
.hero-scroll-dot {
  width: 30px; height: 46px;
  border: 2px solid rgba(255, 255, 255, 0.5);
  border-radius: 20px;
  position: relative;
}
.hero-scroll-dot::before {
  content: "";
  position: absolute;
  top: 8px; left: 50%;
  width: 5px; height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
  transform: translateX(-50%);
  animation: scrollDot 1.8s infinite;
}
@keyframes scrollDot { 0% { top: 8px; opacity: 1; } 70% { top: 26px; opacity: 0; } 100% { top: 8px; opacity: 0; } }

/* ---------- Stats strip ---------- */
.stats-strip {
  background: var(--color-primary);
  color: var(--color-white);
  padding: 48px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat-number { font-family: var(--font-heading); font-size: clamp(30px, 4vw, 42px); font-weight: 800; color: var(--color-accent); display: flex; align-items: baseline; justify-content: center; gap: 2px; }
.stat-label { font-size: 14px; color: rgba(255, 255, 255, 0.8); margin-top: 6px; }

/* ---------- About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.about-media { position: relative; }
.about-media-main { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-media-main img { width: 100%; height: 100%; aspect-ratio: 6 / 5; object-fit: cover; }
.about-media-badge {
  position: absolute;
  bottom: -28px; right: -18px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  padding: 22px 26px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  text-align: center;
  min-width: 150px;
}
.about-media-badge .num { font-family: var(--font-heading); font-size: 32px; font-weight: 800; line-height: 1; }
.about-media-badge .txt { font-size: 12.5px; text-transform: uppercase; letter-spacing: 0.05em; margin-top: 4px; }
.about-points { display: grid; grid-template-columns: 1fr 1fr; gap: 14px 20px; margin: 28px 0 32px; }
.about-point { display: flex; align-items: flex-start; gap: 10px; font-weight: 600; font-size: 14.5px; color: var(--color-primary); }
.about-point i { color: var(--color-accent); margin-top: 3px; }
.about-text p { color: var(--color-gray-700); margin-bottom: 16px; }

/* ---------- Why choose us ---------- */
.why-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.why-card {
  background: var(--color-white);
  border: 1px solid var(--color-gray-100);
  border-radius: var(--radius-md);
  padding: 34px 28px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.why-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: transparent; }
.why-icon {
  width: 58px; height: 58px;
  border-radius: 16px;
  background: rgba(231, 172, 25, 0.14);
  color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}
.why-card h3 { font-size: 19px; margin-bottom: 10px; }
.why-card p { color: var(--color-gray-700); font-size: 15px; }

/* ---------- Services ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.service-media { position: relative; height: 220px; overflow: hidden; background: var(--color-gray-100); }
.service-media img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.5s ease; }
.service-card:hover .service-media img { transform: scale(1.08); }
.service-icon {
  position: absolute;
  bottom: -26px; left: 24px;
  width: 56px; height: 56px;
  background: var(--color-accent);
  color: var(--color-on-accent);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  box-shadow: var(--shadow-md);
}
.service-body { padding: 44px 26px 28px; flex: 1; display: flex; flex-direction: column; }
.service-body h3 { font-size: 20px; margin-bottom: 12px; }
.service-body p { color: var(--color-gray-700); font-size: 15px; margin-bottom: 18px; }
.service-features { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 22px; }
.service-features li {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-light);
  border: 1px solid var(--color-gray-300);
  padding: 5px 12px;
  border-radius: 20px;
}
.service-link { display: inline-flex; align-items: center; gap: 8px; font-weight: 700; color: var(--color-accent-ink); font-size: 14.5px; transition: gap var(--transition); margin-top: auto; }
.service-link:hover { gap: 12px; }

/* ---------- Gallery ---------- */
.gallery-filters { display: flex; justify-content: center; gap: 10px; flex-wrap: wrap; margin-bottom: 40px; }
.gallery-filter-btn {
  padding: 10px 22px;
  border: 1.5px solid var(--color-gray-300);
  border-radius: 30px;
  font-weight: 600;
  font-size: 14px;
  color: var(--color-gray-700);
  transition: all var(--transition);
}
.gallery-filter-btn.is-active, .gallery-filter-btn:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-on-accent); }
.gallery-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.gallery-item { position: relative; border-radius: var(--radius-md); overflow: hidden; cursor: pointer; aspect-ratio: 4 / 3; }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.gallery-item:hover img { transform: scale(1.1); }
.gallery-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.85), rgba(0, 0, 0, 0.05) 60%);
  display: flex; align-items: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity var(--transition);
}
.gallery-item:hover .gallery-overlay { opacity: 1; }
.gallery-overlay span { color: #fff; font-weight: 700; font-size: 15px; }
.gallery-zoom {
  position: absolute; top: 16px; right: 16px;
  width: 40px; height: 40px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--color-primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.gallery-item:hover .gallery-zoom { opacity: 1; }
.gallery-count {
  position: absolute; bottom: 16px; right: 16px;
  display: flex; align-items: center; gap: 6px;
  background: rgba(0, 0, 0, 0.65);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 20px;
  z-index: 1;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0;
  background: rgba(0, 0, 0, 0.94);
  z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity var(--transition);
  padding: 24px;
}
.lightbox.is-open { opacity: 1; visibility: visible; }
.lightbox-inner { max-width: 900px; width: 100%; text-align: center; }
.lightbox-inner img { max-height: 74vh; margin: 0 auto; border-radius: var(--radius-sm); width: auto; }
.lightbox-caption { color: #fff; margin-top: 16px; font-size: 15px; }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute;
  width: 46px; height: 46px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  transition: background var(--transition);
}
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: var(--color-accent); }
.lightbox-close { top: 24px; right: 24px; }
.lightbox-prev { left: 24px; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 24px; top: 50%; transform: translateY(-50%); }

/* ---------- Testimonials ---------- */
.testimonial-slider { position: relative; max-width: 780px; margin: 0 auto; overflow: hidden; }
.testimonial-track { display: flex; transition: transform 0.5s ease; }
.testimonial-slide { flex: 0 0 100%; padding: 8px; }
.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 44px;
  box-shadow: var(--shadow-md);
  text-align: center;
}
.testimonial-quote-icon { color: var(--color-accent); font-size: 30px; margin-bottom: 18px; }
.testimonial-card p { font-size: 18px; color: var(--color-primary); font-style: italic; margin-bottom: 26px; }
.testimonial-person { display: flex; align-items: center; justify-content: center; gap: 14px; }
.testimonial-person img { width: 54px; height: 54px; border-radius: 50%; object-fit: cover; }
.testimonial-person-info { text-align: left; }
.testimonial-name { font-weight: 700; color: var(--color-primary); }
.testimonial-role { font-size: 13px; color: var(--color-gray-500); }
.testimonial-stars { color: var(--color-accent); font-size: 14px; margin-bottom: 10px; }
.testimonial-controls { display: flex; align-items: center; justify-content: center; gap: 20px; margin-top: 32px; }
.testimonial-arrow {
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1.5px solid var(--color-gray-300);
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary);
  transition: all var(--transition);
}
.testimonial-arrow:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-on-accent); }
.testimonial-dots { display: flex; gap: 8px; }
.testimonial-dots button { width: 9px; height: 9px; border-radius: 50%; background: var(--color-gray-300); transition: all var(--transition); }
.testimonial-dots button.is-active { background: var(--color-accent); width: 24px; border-radius: 5px; }

/* ---------- FAQ ---------- */
.faq-layout { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 56px; align-items: start; }
.faq-media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); position: sticky; top: 120px; }
.faq-media img { width: 100%; height: 100%; aspect-ratio: 5 / 6; object-fit: cover; }
.faq-list { display: flex; flex-direction: column; gap: 14px; }
.faq-item { border: 1px solid var(--color-gray-300); border-radius: var(--radius-sm); overflow: hidden; background: var(--color-white); }
.faq-question {
  width: 100%;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 20px 24px;
  font-weight: 700;
  font-size: 16px;
  color: var(--color-primary);
  text-align: left;
}
.faq-question .icon {
  width: 30px; height: 30px;
  border-radius: 50%;
  background: var(--color-gray-100);
  color: var(--color-accent);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition);
}
.faq-item.is-open .faq-question .icon { background: var(--color-accent); color: var(--color-on-accent); transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-answer-inner { padding: 0 24px 22px; color: var(--color-gray-700); }
.faq-item.is-open .faq-answer { max-height: 300px; }

/* ---------- Contact ---------- */
.contact-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; }
.contact-info-list { display: flex; flex-direction: column; gap: 22px; margin-bottom: 34px; }
.contact-info-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-info-icon {
  width: 50px; height: 50px;
  border-radius: 14px;
  background: rgba(231, 172, 25, 0.14);
  color: var(--color-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 19px;
  flex-shrink: 0;
}
.contact-info-item h4 { font-size: 15.5px; margin-bottom: 4px; }
.contact-info-item p, .contact-info-item a { color: var(--color-gray-700); font-size: 15px; }
.contact-map { border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-md); }
.contact-map iframe { width: 100%; height: 260px; border: 0; display: block; }

.form-card { background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 40px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 13.5px; font-weight: 700; color: var(--color-primary); margin-bottom: 8px; }
.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1.5px solid var(--color-gray-300);
  border-radius: var(--radius-sm);
  background: var(--color-light);
  transition: border-color var(--transition), background var(--transition);
}
.form-control:focus { outline: none; border-color: var(--color-accent); background: #fff; }
.form-control.is-invalid { border-color: #e0433f; }
textarea.form-control { min-height: 120px; resize: vertical; }
.form-error { display: block; color: #e0433f; font-size: 12.5px; margin-top: 6px; min-height: 15px; }
.form-success {
  margin-top: 18px;
  padding: 14px 18px;
  background: rgba(45, 160, 100, 0.12);
  color: #1c7a4d;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  display: none;
}
.form-success.is-visible { display: block; }
.form-success.is-error { background: rgba(224, 67, 63, 0.12); color: #b5312d; }

/* ---------- CTA banner ---------- */
.cta-banner {
  background: linear-gradient(120deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: 70px 0;
  text-align: center;
}
.cta-banner h2 { color: #fff; font-size: clamp(26px, 3.4vw, 38px); margin-bottom: 14px; }
.cta-banner p { color: rgba(255, 255, 255, 0.85); max-width: 560px; margin: 0 auto 32px; font-size: 16.5px; }
.cta-banner-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ---------- Footer ---------- */
.site-footer { background: var(--color-primary-dark); color: rgba(255, 255, 255, 0.75); }
.footer-top { padding: 70px 0 40px; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 0.9fr 0.9fr 1.1fr; gap: 40px; }
.footer-brand .brand-name { color: #fff; }
.footer-about { margin: 18px 0 22px; font-size: 14.5px; line-height: 1.7; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition);
}
.footer-social a:hover { background: var(--color-accent); }
.footer-heading { color: #fff; font-size: 16px; margin-bottom: 20px; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14.5px; transition: color var(--transition), padding-left var(--transition); }
.footer-links a:hover { color: var(--color-accent); padding-left: 4px; }
.footer-contact li { display: flex; gap: 10px; margin-bottom: 16px; font-size: 14.5px; align-items: flex-start; }
.footer-contact i { color: var(--color-accent); margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding: 22px 0; }
.footer-bottom .container { display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; font-size: 13.5px; }

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--color-accent);
  color: var(--color-on-accent);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 400;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-accent-dark); }

/* ---------- WhatsApp float ---------- */
.whatsapp-float {
  position: fixed;
  right: 26px; bottom: 92px;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45);
  z-index: 400;
  transition: all var(--transition);
  animation: whatsappPulse 2.4s infinite;
}
.whatsapp-float:hover { background: #1ebe5a; color: #fff; transform: scale(1.06); }
@keyframes whatsappPulse {
  0% { box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45), 0 0 0 0 rgba(37, 211, 102, 0.45); }
  70% { box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45), 0 0 0 14px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 4px 16px rgba(37, 211, 102, 0.45), 0 0 0 0 rgba(37, 211, 102, 0); }
}
@media (max-width: 480px) {
  .whatsapp-float { right: 16px; bottom: 76px; width: 50px; height: 50px; font-size: 25px; }
}

/* ---------- Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
[data-reveal="fade"] { transform: none; }

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1100px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .why-grid, .services-grid, .gallery-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 992px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed; top: 0; right: 0;
    height: 100vh; width: min(340px, 85vw);
    background: var(--color-primary-dark);
    flex-direction: column;
    align-items: stretch;
    padding: 100px 28px 40px;
    transform: translateX(100%);
    transition: transform 0.35s ease;
    gap: 4px;
    overflow-y: auto;
  }
  .nav-menu.is-open { transform: translateX(0); box-shadow: -20px 0 40px rgba(0,0,0,0.3); }
  .nav-menu a { color: #fff !important; padding: 14px 10px; border-bottom: 1px solid rgba(255,255,255,0.08); }
  .nav-menu .lang-switch { display: flex; margin-top: 20px; border-color: rgba(255,255,255,0.3); align-self: flex-start; }
  .nav-mobile-cta { display: block; margin-top: 10px; }
  .header-phone { display: none; }
  .header-actions .lang-switch { display: none; }
  .header-actions .btn-sm { display: none; }
  .header-actions { gap: 8px; }
  .about-grid, .faq-layout, .contact-layout { grid-template-columns: 1fr; }
  .faq-media { position: static; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
}

@media (max-width: 768px) {
  .why-grid, .services-grid, .gallery-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 30px; }
  .form-row { grid-template-columns: 1fr; }
  .about-points { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-content { padding: 70px 0 50px; }
  .about-media-badge { position: static; margin-top: -40px; margin-left: 20px; display: inline-block; }
  .lightbox-prev, .lightbox-next { width: 38px; height: 38px; }
}

@media (max-width: 480px) {
  .hero-ctas { flex-direction: column; align-items: stretch; }
  .hero-ctas .btn { width: 100%; }
  .topbar-left { display: none; }
  .form-card { padding: 26px; }
}