/* ═══════════════════════════════════════════════════════════
   Main Stylesheet — CalipsoMarin
   Professional marine engineering & diving company.
   All content floats above a fixed ocean background using
   glassmorphism cards and translucent surfaces.
   ═══════════════════════════════════════════════════════════ */


/* ═══════════════════════════════════════════════════════════
   §1  Body & Base
   ═══════════════════════════════════════════════════════════ */

body {
  font-family: var(--font-primary);
  font-size: var(--fs-base);
  font-weight: var(--fw-regular);
  line-height: var(--lh-normal);
  color: var(--clr-text-primary);
  background: var(--clr-navy-deep);
  overflow-x: hidden;
}

::selection {
  background: hsla(185, 60%, 55%, 0.35);
  color: var(--clr-white);
}

::-moz-selection {
  background: hsla(185, 60%, 55%, 0.35);
  color: var(--clr-white);
}


/* ═══════════════════════════════════════════════════════════
   §2  Content Layer
   ═══════════════════════════════════════════════════════════ */

.content-layer {
  position: relative;
  z-index: 1;
}


/* ═══════════════════════════════════════════════════════════
   §3  Navbar
   ═══════════════════════════════════════════════════════════ */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  z-index: 100;
  background: var(--glass-bg-nav);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.site-nav.is-scrolled {
  background: rgba(2, 27, 46, 0.88);
  border-bottom-color: var(--glass-border-hover);
}

.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--content-max-wide);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

.site-nav__logo {
  flex-shrink: 0;
}

.site-nav__logo img {
  height: 40px;
  width: auto;
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.site-nav__link {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-widest);
  text-transform: uppercase;
  color: var(--clr-text-secondary);
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--duration-fast) var(--ease-out);
}

.site-nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--clr-turquoise);
  border-radius: var(--radius-full);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform var(--duration-normal) var(--ease-out);
}

.site-nav__link:hover {
  color: var(--clr-text-primary);
}

.site-nav__link:hover::after {
  transform: scaleX(0.6);
}

.site-nav__link.is-active {
  color: var(--clr-turquoise);
}

.site-nav__link.is-active::after {
  transform: scaleX(1);
}

/* Hamburger toggle (mobile) */
.site-nav__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  gap: 6px;
  cursor: pointer;
  z-index: 110;
}

.site-nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--clr-text-primary);
  border-radius: var(--radius-full);
  transition: transform var(--duration-normal) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
  transform-origin: center;
}

.site-nav__toggle.is-open span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.site-nav__toggle.is-open span:nth-child(2) {
  opacity: 0;
}

.site-nav__toggle.is-open span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* Mobile menu overlay */
.site-nav__mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  background: rgba(2, 20, 38, 0.92);
  backdrop-filter: blur(var(--glass-blur-heavy));
  -webkit-backdrop-filter: blur(var(--glass-blur-heavy));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  z-index: 105;
  transform: translateX(100%);
  opacity: 0;
  transition: transform var(--duration-slow) var(--ease-out),
              opacity var(--duration-normal) var(--ease-out);
  pointer-events: none;
}

.site-nav__mobile-menu.is-open {
  transform: translateX(0);
  opacity: 1;
  pointer-events: auto;
}

.site-nav__mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
}

.site-nav__mobile-link {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-secondary);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-nav__mobile-link:hover,
.site-nav__mobile-link.is-active {
  color: var(--clr-turquoise);
}


/* ═══════════════════════════════════════════════════════════
   §4  Typography & Headings
   ═══════════════════════════════════════════════════════════ */

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: var(--clr-text-primary);
}

h1 { font-size: var(--fs-2xl); }
h2 { font-size: var(--fs-xl); }
h3 { font-size: var(--fs-lg); }
h4 { font-size: var(--fs-md); }

p {
  font-size: var(--fs-base);
  line-height: var(--lh-relaxed);
  color: var(--clr-text-secondary);
  max-width: 65ch;
}


/* ═══════════════════════════════════════════════════════════
   §5  Sections — Base
   ═══════════════════════════════════════════════════════════ */

.section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: var(--space-3xl) var(--content-padding);
}

.section__inner {
  width: 100%;
  max-width: var(--content-max-width);
}

.section__subtitle {
  font-family: var(--font-display);
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-white);
  margin-bottom: var(--space-sm);
  text-shadow: 0 1px 15px rgba(0, 5, 15, 0.3);
}

.section__title {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-lg);
  text-shadow: 0 2px 20px rgba(0, 5, 15, 0.3);
}

.section__desc {
  color: var(--clr-text-secondary);
  max-width: 65ch;
  line-height: var(--lh-relaxed);
  text-shadow: 0 1px 15px rgba(0, 5, 15, 0.3);
}


/* ═══════════════════════════════════════════════════════════
   §6  Hero Section
   ═══════════════════════════════════════════════════════════ */

.section--hero {
  min-height: 100vh;
  justify-content: flex-end;
  padding-bottom: var(--space-3xl);
  text-align: center;
}

.hero__logo {
  display: block;
  margin: 0 auto var(--space-lg);
  height: auto;
  width: clamp(220px, 60vw, 420px);
  max-width: 100%;
  filter: drop-shadow(0 6px 24px rgba(0, 5, 15, 0.35));
}

.hero__title {
  font-family: var(--font-display);
  font-size: var(--fs-base);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-primary);
  text-shadow: 0 2px 15px rgba(0, 0, 0, 0.3);
  margin-bottom: var(--space-sm);
}

.hero__subtitle {
  font-size: var(--fs-md);
  color: var(--clr-text-secondary);
  margin-top: var(--space-sm);
}

.hero__desc {
  margin: var(--space-md) auto 0;
  max-width: 50ch;
  color: var(--clr-text-secondary);
  text-shadow: 0 1px 15px rgba(0, 0, 0, 0.20);
}

/* Backward-compatible hero heading (from HTML) */
.section--hero h1 {
  font-size: var(--fs-2xl);
  text-shadow: 0 2px 30px rgba(0, 0, 0, 0.25);
}

.section--hero p {
  margin: var(--space-md) auto 0;
  max-width: 50ch;
  text-shadow: 0 1px 15px rgba(0, 0, 0, 0.20);
}

/* Scroll indicator */
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xs);
  margin-top: var(--space-xl);
  opacity: 0.6;
  animation: scroll-hint 2.5s var(--ease-in-out) infinite;
  text-decoration: none;
  cursor: pointer;
}

.scroll-indicator__text {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-white);
}

.scroll-indicator__arrow {
  width: 24px;
  height: 24px;
  border-right: 2px solid var(--clr-white);
  border-bottom: 2px solid var(--clr-white);
  transform: rotate(45deg);
}

@keyframes scroll-hint {
  0%, 100% {
    opacity: 0.7;
    transform: translateY(0);
  }
  50% {
    opacity: 1;
    transform: translateY(8px);
  }
}


/* ═══════════════════════════════════════════════════════════
   §7  About Section
   ═══════════════════════════════════════════════════════════ */

.section--about {
  padding-top: var(--space-4xl);
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  align-items: start;
  margin-top: var(--space-xl);
}

.about__content {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about__content p {
  color: var(--clr-text-secondary);
  line-height: var(--lh-relaxed);
}

.about__media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--glass-shadow-lg);
  aspect-ratio: 3 / 4;
}

.about__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* Stats row */
.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.stat-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.stat-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}

.stat-card__number {
  font-family: var(--font-display);
  font-size: var(--fs-xl);
  font-weight: var(--fw-bold);
  color: var(--clr-white);
  line-height: var(--lh-tight);
  margin-bottom: var(--space-2xs);
}

.stat-card__label {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: var(--ls-wide);
}


/* ═══════════════════════════════════════════════════════════
   §8  Services Section
   ═══════════════════════════════════════════════════════════ */

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.service-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: transform var(--duration-normal) var(--ease-spring),
              background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out),
              box-shadow var(--duration-normal) var(--ease-out);
}

.service-card:hover {
  transform: scale(1.02);
  background: var(--glass-bg-strong);
  border-color: var(--glass-border-accent);
  box-shadow: var(--glass-shadow-lg),
              0 0 40px rgba(100, 200, 220, 0.06);
}

.service-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  color: var(--clr-white);
  font-size: var(--fs-lg);
  flex-shrink: 0;
}

.service-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--clr-text-primary);
}

.service-card__desc {
  font-size: var(--fs-sm);
  color: var(--clr-text-muted);
  line-height: var(--lh-relaxed);
}


/* ═══════════════════════════════════════════════════════════
   §9  Equipment Section
   ═══════════════════════════════════════════════════════════ */

/* Equipment showcase layout with media + info */
.equipment__showcase {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-top: var(--space-xl);
  box-shadow: var(--glass-shadow-lg);
}

.equipment__showcase-media img {
  width: 100%;
  height: auto;
  max-height: 480px;
  object-fit: cover;
}

.equipment__showcase-info {
  padding: var(--space-xl);
}

.equipment__showcase-info h3 {
  font-family: var(--font-display);
  font-size: var(--fs-lg);
  font-weight: var(--fw-bold);
  margin-bottom: var(--space-sm);
}

.equipment__showcase-info p {
  color: var(--clr-text-secondary);
  line-height: var(--lh-relaxed);
}

.equipment__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.equipment-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--duration-normal) var(--ease-spring),
              border-color var(--duration-normal) var(--ease-out);
}

.equipment-card:hover {
  transform: scale(1.02);
  border-color: var(--glass-border-hover);
}

.equipment-card__img-wrap {
  overflow: hidden;
  aspect-ratio: 16 / 10;
}

.equipment-card__img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.equipment-card:hover .equipment-card__img-wrap img {
  transform: scale(1.05);
}

.equipment-card__caption {
  padding: var(--space-md);
}

.equipment-card__caption h4 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  margin-bottom: var(--space-2xs);
}

.equipment-card__caption p {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  line-height: var(--lh-normal);
}


/* ═══════════════════════════════════════════════════════════
   §10  Gallery Section
   ═══════════════════════════════════════════════════════════ */

.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 240px;
  gap: var(--space-md);
  margin-top: var(--space-xl);
}

.gallery__item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  cursor: pointer;
}

.gallery__item--wide {
  grid-column: span 2;
}

.gallery__item--tall {
  grid-row: span 3;
}

.gallery__item img,
.gallery__item video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--duration-slow) var(--ease-out);
}

.gallery__item:hover img,
.gallery__item:hover video {
  transform: scale(1.05);
}

.gallery__item__overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(2, 20, 38, 0.55);
  opacity: 0;
  transition: opacity var(--duration-normal) var(--ease-out);
}

.gallery__item__icon {
  font-size: var(--fs-xl);
  color: var(--clr-white);
  opacity: 0.9;
}

.gallery__item:hover .gallery__item__overlay {
  opacity: 1;
}

.gallery__item__caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--fs-xs);
  color: var(--clr-text-secondary);
  background: linear-gradient(transparent, rgba(0, 10, 20, 0.7));
}

/* Persistent Play Button Indicator for Videos */
.gallery__item:has(video)::after {
  content: '\f144'; /* fa-circle-play */
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 3.5rem;
  color: rgba(255, 255, 255, 0.65);
  text-shadow: 0 4px 15px rgba(0, 5, 15, 0.4);
  pointer-events: none;
  z-index: 2;
  transition: opacity var(--duration-normal) var(--ease-out),
              transform var(--duration-normal) var(--ease-out);
}

.gallery__item:has(video):hover::after {
  opacity: 0;
  transform: translate(-50%, -50%) scale(1.15);
}


/* ═══════════════════════════════════════════════════════════
   §11  References Section
   ═══════════════════════════════════════════════════════════ */

.references__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.reference-category {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.reference-category:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}

.reference-category__title {
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: var(--fw-semibold);
  color: var(--clr-text-primary);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.reference-category__title::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 1.2em;
  background: var(--clr-turquoise);
  border-radius: var(--radius-full);
  flex-shrink: 0;
}

.reference-category--full {
  grid-column: 1 / -1;
}

.reference-category__list--cols {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xs) var(--space-xl);
}

.reference-category__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.reference-category__list li {
  font-size: var(--fs-sm);
  color: var(--clr-text-secondary);
  padding-left: var(--space-md);
  position: relative;
  line-height: var(--lh-relaxed);
}

.reference-category__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 1px;
  background: var(--clr-turquoise-soft);
  opacity: 0.5;
}


/* ═══════════════════════════════════════════════════════════
   §12  Contact Section
   ═══════════════════════════════════════════════════════════ */

.contact__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.contact-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  text-align: center;
  align-items: center;
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.contact-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-accent);
}

.contact-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: var(--radius-full);
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  color: var(--clr-white);
  font-size: var(--fs-lg);
}

.contact-card__title {
  font-family: var(--font-display);
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: var(--ls-wider);
  text-transform: uppercase;
  color: var(--clr-text-muted);
}

.contact-card__value {
  font-size: var(--fs-base);
  color: var(--clr-text-primary);
  font-weight: var(--fw-medium);
  word-break: break-word;
}

.contact-card__value a {
  color: var(--clr-text-primary);
  transition: color var(--duration-fast) var(--ease-out);
}

.contact-card__value a:hover {
  color: var(--clr-turquoise);
}


/* ═══════════════════════════════════════════════════════════
   §13  Footer
   ═══════════════════════════════════════════════════════════ */

.site-footer {
  position: relative;
  z-index: 1;
  padding: var(--space-2xl) var(--content-padding);
}

.footer__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  max-width: var(--content-max-width);
  margin: 0 auto;
  text-align: center;
}

.footer__logo {
  height: auto;
  width: auto;
  max-height: 120px;
}

.footer__divider {
  width: 100%;
  max-width: 200px;
  height: 1px;
  background: var(--glass-border);
  border: none;
}

.footer__copy {
  font-size: var(--fs-xs);
  color: var(--clr-text-muted);
  letter-spacing: var(--ls-wide);
}


/* ═══════════════════════════════════════════════════════════
   §14  Lightbox
   ═══════════════════════════════════════════════════════════ */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--duration-normal) var(--ease-out),
              visibility var(--duration-normal);
}

.lightbox.is-active {
  opacity: 1;
  visibility: visible;
}

.lightbox__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(0, 5, 15, 0.85);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.lightbox__content {
  position: relative;
  z-index: 1;
  max-width: 90vw;
  max-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox__content img,
.lightbox__content video {
  max-width: 100%;
  max-height: 85vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  box-shadow: var(--glass-shadow-lg);
}

.lightbox__close {
  position: absolute;
  top: var(--space-lg);
  right: var(--space-lg);
  z-index: 2;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--fs-lg);
  color: var(--clr-text-primary);
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
}

.lightbox__close:hover {
  background: var(--glass-bg-hover);
  transform: scale(1.1);
}


/* ═══════════════════════════════════════════════════════════
   §15  Scroll Reveal Animations
   ═══════════════════════════════════════════════════════════ */

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity var(--duration-reveal) var(--ease-out),
              transform var(--duration-reveal) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }


/* ═══════════════════════════════════════════════════════════
   §16  Glassmorphism Card — Reusable Base
   ═══════════════════════════════════════════════════════════ */

.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: background var(--duration-normal) var(--ease-out),
              border-color var(--duration-normal) var(--ease-out);
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-hover);
}


/* ═══════════════════════════════════════════════════════════
   §17  Utilities
   ═══════════════════════════════════════════════════════════ */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.text-muted  { color: var(--clr-text-muted); }
.text-accent { color: var(--clr-turquoise); }
.text-gold   { color: var(--clr-gold-light); }


/* ═══════════════════════════════════════════════════════════
   §18  Responsive — 1200px (Large desktop → Standard)
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 1200px) {
  .equipment__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery__grid {
    grid-auto-rows: 210px;
  }
}


/* ═══════════════════════════════════════════════════════════
   §19  Responsive — 1024px (Standard → Tablet Landscape)
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__grid {
    gap: var(--space-xl);
  }

  .contact__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}


/* ═══════════════════════════════════════════════════════════
   §20  Responsive — 768px (Tablet → Mobile)
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 768px) {
  /* Navbar collapses to hamburger */
  .site-nav {
    height: var(--nav-height-mobile);
  }

  .site-nav__links {
    display: none;
  }

  .site-nav__toggle {
    display: flex;
  }

  /* Sections */
  .section {
    min-height: 85vh;
    padding: var(--space-2xl) var(--content-padding);
  }

  .section--hero {
    min-height: 100vh;
    padding-bottom: var(--space-2xl);
  }

  /* About */
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .about__media {
    order: -1;
    aspect-ratio: 4 / 5;
  }

  .about__stats {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
  }

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

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

  .equipment__showcase img {
    max-height: 320px;
  }

  /* Gallery */
  .gallery__grid {
    grid-template-columns: repeat(2, 1fr);
    grid-auto-rows: 180px;
  }

  .gallery__item--wide {
    grid-column: span 1;
  }

  /* References */
  .references__grid {
    grid-template-columns: 1fr;
  }

  /* Contact */
  .contact__grid {
    grid-template-columns: 1fr;
  }

  /* Typography scaling */
  .section__title {
    font-size: var(--fs-lg);
  }
}


/* ═══════════════════════════════════════════════════════════
   §21  Responsive — 480px (Small Mobile)
   ═══════════════════════════════════════════════════════════ */

@media (max-width: 480px) {
  .section--hero h1,
  .hero__title {
    font-size: var(--fs-md);
  }

  .about__stats {
    grid-template-columns: 1fr;
  }

  .stat-card {
    flex-direction: row;
    display: flex;
    align-items: center;
    gap: var(--space-md);
    text-align: left;
    padding: var(--space-md);
  }

  .equipment__grid {
    grid-template-columns: 1fr;
  }

  .gallery__grid {
    grid-template-columns: 1fr;
    grid-auto-rows: 200px;
  }

  .gallery__item--tall {
    grid-row: span 1;
  }

  .scroll-indicator {
    margin-top: var(--space-lg);
  }

  /* Removed hero__badge */

  .lightbox__close {
    top: var(--space-md);
    right: var(--space-md);
  }
}


/* ═══════════════════════════════════════════════════════════
   WhatsApp Floating Button
   ═══════════════════════════════════════════════════════════ */

.whatsapp-btn {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 55px;
  height: 55px;
  background: rgba(37, 211, 102, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-white);
  font-size: 32px;
  z-index: 900;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25), inset 0 1px 1px rgba(255, 255, 255, 0.4);
  transition: transform 0.3s var(--ease-out-back), background 0.3s ease;
  text-decoration: none;
}

.whatsapp-btn:hover {
  transform: scale(1.1) translateY(-4px);
  background: rgba(37, 211, 102, 0.9);
  color: var(--clr-white);
}

@media (max-width: 768px) {
  .whatsapp-btn {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 50px;
    height: 50px;
    font-size: 28px;
  }
}

/* ═══════════════════════════════════════════════════════════
   §22  Reduced Motion — Accessibility
   ═══════════════════════════════════════════════════════════ */

@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;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .scroll-indicator {
    animation: none;
    opacity: 0.6;
  }

  .service-card:hover,
  .equipment-card:hover {
    transform: none;
  }

  .gallery__item:hover img,
  .gallery__item:hover video {
    transform: none;
  }

  .lightbox__close:hover {
    transform: none;
  }
}