/* ============================================
   BHM Construcciones — Page styles
   Tokens come from colors_and_type.css
   ============================================ */

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--color-bg);
  font-family: var(--font-body);
  color: var(--color-fg2);
  overflow-x: hidden;
}
::selection { background: var(--color-accent); color: #fff; }
img { max-width: 100%; display: block; }
button { font: inherit; }
[hidden] { display: none !important; }

/* ===== Navbar ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 48px;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: padding var(--duration-normal) var(--ease-default),
              background var(--duration-normal) var(--ease-default),
              border-color var(--duration-normal) var(--ease-default);
}
.nav.is-scrolled {
  padding: 12px 48px;
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom-color: var(--color-gray-200);
}
.nav__logo {
  display: block;
  position: relative;
  height: 34px;
  width: auto;
  cursor: pointer;
}
.nav__logo-img {
  height: 34px;
  width: auto;
  display: block;
  transition: opacity var(--duration-normal) var(--ease-default);
}
.nav__logo-img--color {
  position: absolute;
  top: 0; left: 0;
  opacity: 0;
}
.nav.is-scrolled .nav__logo-img--white { opacity: 0; }
.nav.is-scrolled .nav__logo-img--color { opacity: 1; }

.nav__links {
  display: flex;
  gap: 28px;
  align-items: center;
}
.nav__link {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: #fff;
  text-decoration: none;
  cursor: pointer;
  transition: color var(--duration-fast) var(--ease-default);
}
.nav.is-scrolled .nav__link { color: var(--color-fg2); }
.nav__link:hover { color: var(--color-accent); }

.nav__cta {
  padding: 10px 24px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-display);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-default);
}
.nav__cta:hover { background: var(--color-accent-dark); }

/* ===== Hero ===== */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  background: var(--color-primary-dark);
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero__slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease;
}
.hero__slide.is-active { opacity: 1; }
.hero__overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(135deg, rgba(21, 47, 69, 0.85) 0%, rgba(31, 72, 105, 0.55) 100%);
}
.hero__content {
  position: relative;
  z-index: 2;
  padding: 0 64px;
  max-width: 720px;
}
.hero__overline {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 18px;
}
.hero__title {
  font-family: var(--font-display);
  font-size: 56px;
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: #fff;
  margin: 0 0 22px;
}
.hero__desc {
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.7);
  margin: 0 0 36px;
  max-width: 520px;
}
.hero__actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__dots {
  position: absolute;
  bottom: 40px;
  left: 64px;
  display: flex;
  gap: 10px;
  z-index: 3;
}
.hero__dot {
  width: 10px;
  height: 10px;
  border-radius: 5px;
  border: none;
  padding: 0;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: width var(--duration-normal) var(--ease-default),
              background var(--duration-normal) var(--ease-default);
}
.hero__dot.is-active {
  width: 32px;
  background: var(--color-accent);
}
.hero__slide-label {
  position: absolute;
  bottom: 40px;
  right: 64px;
  z-index: 3;
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.5);
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 15px 34px;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
  transition: background var(--duration-fast) var(--ease-default),
              border-color var(--duration-fast) var(--ease-default),
              color var(--duration-fast) var(--ease-default);
}
.btn--primary { background: var(--color-accent); color: #fff; }
.btn--primary:hover { background: var(--color-accent-dark); }
.btn--ghost {
  background: transparent;
  color: #fff;
  border: 1.5px solid rgba(255, 255, 255, 0.3);
}
.btn--ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.6);
}

/* ===== Stats ===== */
.stats {
  display: flex;
  background: var(--color-primary);
  padding: 44px 64px;
}
.stats__item { flex: 1; text-align: center; }
.stats__value {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 800;
  color: #fff;
}
.stats__label {
  font-family: var(--font-body);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.55);
  margin-top: 6px;
}

/* ===== Section header ===== */
.section-header { text-align: center; margin-bottom: 56px; }
.section-header--padded { padding: 0 64px; margin-bottom: 48px; }
.overline {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 14px;
}
.section-title {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 800;
  color: var(--color-fg1);
  margin: 0;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

/* ===== Services ===== */
.services { padding: 88px 64px; background: var(--color-bg); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: box-shadow var(--duration-normal) var(--ease-default),
              transform var(--duration-normal) var(--ease-default);
}
.service-card:hover,
.service-card:focus-visible {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  outline: none;
}
.service-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(31, 72, 105, 0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 22px;
  color: var(--color-primary);
}
.service-card__title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-fg1);
  margin: 0;
}
.service-card__desc {
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-fg3);
  line-height: 1.6;
  margin: 0;
}
.service-card__arrow {
  margin-top: auto;
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== Gallery ===== */
.gallery {
  padding: 80px 0;
  background: var(--color-bg-alt);
}
.gallery__viewport {
  overflow: hidden;
}
.gallery__track {
  display: flex;
  gap: 24px;
  width: max-content;
  animation: gallery-scroll var(--gallery-duration, 80s) linear infinite;
  will-change: transform;
}
.gallery__track:hover { animation-play-state: paused; }
@keyframes gallery-scroll {
  from { transform: translateX(0); }
  to   { transform: translateX(calc(-324px * var(--gallery-count, 8))); }
}
.gallery__card {
  flex: 0 0 300px;
  height: 220px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-dark);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}
.gallery__card-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.gallery__card-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -60%);
  color: rgba(255, 255, 255, 0.18);
  font-size: 64px;
  font-family: var(--font-display);
  font-weight: 800;
  pointer-events: none;
}
.gallery__card-label {
  position: relative;
  z-index: 1;
  width: 100%;
  padding: 14px 18px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
}
.gallery__card-title {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
}
.gallery__card-cat {
  font-family: var(--font-body);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 2px;
}

/* ===== About ===== */
.about {
  padding: 88px 64px;
  background: #fff;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.about__image {
  height: 380px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-dark);
  overflow: hidden;
  position: relative;
}
.about__photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.about__title {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 800;
  color: var(--color-fg1);
  margin: 0 0 18px;
  letter-spacing: -0.02em;
  line-height: 1.15;
}
.about__desc {
  font-family: var(--font-body);
  font-size: 16px;
  color: var(--color-fg2);
  line-height: 1.7;
  margin: 0 0 24px;
}
.about__features {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.about__features li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--color-fg2);
  line-height: 1.5;
}
.about__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-top: 7px;
  flex-shrink: 0;
  display: inline-block;
}

/* ===== CTA ===== */
.cta {
  padding: 72px 64px;
  background: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
}
.cta__text { max-width: 540px; }
.cta__title {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 10px;
}
.cta__desc {
  font-family: var(--font-body);
  font-size: 16px;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
  line-height: 1.65;
}
.cta__btn {
  padding: 16px 40px;
  background: var(--color-accent);
  color: #fff;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  font-family: var(--font-display);
  flex-shrink: 0;
  text-decoration: none;
  transition: background var(--duration-fast) var(--ease-default);
}
.cta__btn:hover { background: var(--color-accent-dark); }

/* ===== Footer ===== */
.footer {
  padding: 52px 64px 36px;
  background: var(--color-black);
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  color: rgba(255, 255, 255, 0.5);
  font-family: var(--font-body);
  font-size: 13px;
}
.footer__col { display: flex; flex-direction: column; gap: 8px; }
.footer__heading {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.footer__logo {
  height: 28px;
  width: auto;
  margin-bottom: 14px;
  object-fit: contain;
  max-width: 140px;
}
.footer__link {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}
.footer__link:hover { color: var(--color-accent); }
.footer__copy {
  grid-column: 1 / -1;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.25);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px;
  margin-top: 8px;
}

/* ===== WhatsApp floating button ===== */
.wa-btn {
  position: fixed;
  bottom: 28px;
  right: 28px;
  z-index: 999;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(37, 211, 102, 0.4);
  text-decoration: none;
  animation: wa-float 3s ease-in-out infinite;
  transition: transform var(--duration-fast) var(--ease-default);
}
.wa-btn:hover {
  transform: scale(1.1);
  animation-play-state: paused;
}
.wa-btn__icon { width: 32px; height: 32px; fill: #fff; }
@keyframes wa-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-6px); }
}

/* ===== Service Detail ===== */
#service-view { padding-top: 80px; }
.detail-hero {
  background: var(--color-primary);
  padding: 64px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.detail-hero__back {
  font-family: var(--font-display);
  font-size: 14px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  transition: color var(--duration-fast) var(--ease-default);
}
.detail-hero__back:hover { color: #fff; }
.detail-hero__title {
  font-family: var(--font-display);
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  margin: 0;
  line-height: 1.15;
  letter-spacing: -0.02em;
}
.detail-hero__subtitle {
  font-family: var(--font-body);
  font-size: 18px;
  color: rgba(255, 255, 255, 0.6);
  margin: 0;
}
.detail-body { padding: 56px 64px; }
.detail-body__desc {
  font-family: var(--font-body);
  font-size: 17px;
  color: var(--color-fg2);
  line-height: 1.7;
  max-width: 640px;
  margin: 0 0 48px;
}
.detail-body__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.detail-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}
.detail-card__img {
  height: 160px;
  background: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.18);
  font-size: 48px;
  font-family: var(--font-display);
  font-weight: 800;
  position: relative;
  overflow: hidden;
}
.detail-card__img-photo {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.detail-card__body { padding: 20px 22px; }
.detail-card__title {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--color-fg1);
  margin-bottom: 6px;
}
.detail-card__desc {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--color-fg3);
  line-height: 1.55;
  margin: 0;
}
.detail-card__cta {
  margin: 14px 22px 20px;
  padding: 10px 0;
  background: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
  display: block;
  transition: background var(--duration-fast) var(--ease-default);
}
.detail-card__cta:hover { background: var(--color-accent-dark); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .nav { padding: 14px 32px; }
  .nav.is-scrolled { padding: 10px 32px; }
  .nav__links { gap: 20px; }
  .hero__content { padding: 0 40px; }
  .hero__dots { left: 40px; }
  .hero__slide-label { right: 40px; }
  .stats { padding: 40px 32px; }
  .services { padding: 72px 32px; }
  .services__grid { gap: 20px; }
  .gallery { padding: 72px 0; }
  .section-header--padded { padding: 0 32px; }
  .about { padding: 72px 32px; gap: 40px; }
  .cta { padding: 56px 32px; }
  .footer { padding: 48px 32px 32px; gap: 28px; }
  .detail-hero { padding: 48px 32px; }
  .detail-body { padding: 48px 32px; }
}
@media (max-width: 768px) {
  .hero { min-height: 560px; }
  .hero__title { font-size: 40px; }
  .hero__desc { font-size: 16px; }
  .hero__placeholder { font-size: 80px; }
  .stats { flex-wrap: wrap; gap: 24px 0; padding: 32px 24px; }
  .stats__item { flex: 1 1 50%; }
  .stats__value { font-size: 32px; }
  .section-title { font-size: 30px; }
  .services__grid { grid-template-columns: 1fr; }
  .about { grid-template-columns: 1fr; }
  .about__image { height: 280px; font-size: 60px; }
  .cta { flex-direction: column; align-items: flex-start; padding: 48px 24px; }
  .footer { grid-template-columns: 1fr 1fr; }
  .detail-hero__title { font-size: 32px; }
  .detail-body__grid { grid-template-columns: repeat(2, 1fr); }
  .nav__link[data-action="scroll"] { display: none; }
}
@media (max-width: 520px) {
  .hero__title { font-size: 32px; }
  .hero__placeholder { font-size: 64px; }
  .hero__slide-label { display: none; }
  .footer { grid-template-columns: 1fr; }
  .detail-body__grid { grid-template-columns: 1fr; }
  .nav { padding: 12px 20px; }
  .nav.is-scrolled { padding: 10px 20px; }
  .nav__cta { padding: 8px 18px; }
  .wa-btn { width: 54px; height: 54px; bottom: 20px; right: 20px; }
  .wa-btn__icon { width: 28px; height: 28px; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}