/* ============================================================
   [Company Name] · Hong Kong Professional Services
   Pure static multilingual site stylesheet
   ============================================================ */

/* ---------- 1. Design Tokens ---------- */
:root {
  /* Color */
  --c-primary:        #0a2540;
  --c-primary-2:      #14365c;
  --c-primary-soft:   #1e4a7a;
  --c-accent:         #c9a961;
  --c-accent-soft:    #e0c98a;
  --c-bg:             #f8f6f1;
  --c-bg-alt:         #ffffff;
  --c-bg-dark:        #0a2540;
  --c-text:           #1a1f2e;
  --c-text-muted:     #5b6478;
  --c-text-inverse:   #f4f1ea;
  --c-text-inverse-m: #b8c2d4;
  --c-border:         #e5e1d8;
  --c-border-dark:    rgba(244, 241, 234, 0.14);
  --c-shadow:         0 1px 2px rgba(10, 37, 64, 0.04), 0 8px 24px rgba(10, 37, 64, 0.06);
  --c-shadow-lg:      0 4px 8px rgba(10, 37, 64, 0.06), 0 24px 48px rgba(10, 37, 64, 0.10);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter',
               'PingFang SC', 'PingFang TC', 'Microsoft YaHei',
               'Noto Sans SC', 'Noto Sans TC', 'Helvetica Neue', sans-serif;
  --font-serif: 'Source Han Serif SC', 'Source Han Serif TC',
                'Noto Serif SC', 'Noto Serif TC', Georgia, serif;

  /* Spacing scale */
  --s-1: 0.25rem;
  --s-2: 0.5rem;
  --s-3: 0.75rem;
  --s-4: 1rem;
  --s-5: 1.5rem;
  --s-6: 2rem;
  --s-7: 3rem;
  --s-8: 4rem;
  --s-9: 6rem;
  --s-10: 8rem;

  /* Layout */
  --container: 1200px;
  --container-narrow: 880px;
  --radius: 4px;
  --radius-lg: 10px;
  --header-h: 72px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 2. Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
img, svg { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
ul, ol { list-style: none; }
:focus-visible { outline: 2px solid var(--c-accent); outline-offset: 3px; }

/* ---------- 3. Typography ---------- */
h1, h2, h3, h4 { line-height: 1.2; font-weight: 600; letter-spacing: -0.01em; color: var(--c-primary); }
h1 { font-size: clamp(2.4rem, 5.5vw, 4.2rem); font-weight: 700; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: 1.25rem; }
p  { color: var(--c-text); }
.lead { font-size: 1.15rem; color: var(--c-text-muted); line-height: 1.75; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 0.6em;
  font-size: 0.78rem; font-weight: 600; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--c-accent);
}
.eyebrow::before {
  content: ""; width: 28px; height: 1px; background: var(--c-accent);
}

/* ---------- 4. Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--s-5); }
.container-narrow { max-width: var(--container-narrow); }
.section { padding: var(--s-10) 0; }
.section-sm { padding: var(--s-8) 0; }
.section-dark { background: var(--c-bg-dark); color: var(--c-text-inverse); }
.section-dark h1, .section-dark h2, .section-dark h3 { color: var(--c-text-inverse); }
.section-dark p { color: var(--c-text-inverse-m); }
.section-alt { background: var(--c-bg-alt); }

.divider { height: 1px; background: var(--c-border); border: 0; }
.divider-dark { background: var(--c-border-dark); }

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.5em; padding: 0.85rem 1.6rem; font-size: 0.95rem; font-weight: 500;
  letter-spacing: 0.02em; border-radius: var(--radius); transition: all 0.25s var(--ease);
  white-space: nowrap; min-height: 48px;
}
.btn-primary { background: var(--c-primary); color: var(--c-text-inverse); }
.btn-primary:hover { background: var(--c-primary-2); transform: translateY(-1px); box-shadow: var(--c-shadow); }
.btn-accent { background: var(--c-accent); color: var(--c-primary); }
.btn-accent:hover { background: var(--c-accent-soft); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--c-text-inverse); border: 1px solid var(--c-border-dark); }
.btn-ghost:hover { background: rgba(244, 241, 234, 0.08); border-color: var(--c-accent); }
.btn-outline { background: transparent; color: var(--c-primary); border: 1px solid var(--c-primary); }
.btn-outline:hover { background: var(--c-primary); color: var(--c-text-inverse); }
.btn .arrow { transition: transform 0.25s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- 6. Header / Nav ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h); display: flex; align-items: center;
  background: transparent; transition: background 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.site-header.scrolled {
  background: rgba(248, 246, 241, 0.92);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  box-shadow: 0 1px 0 var(--c-border);
}
.site-header .container { display: flex; align-items: center; justify-content: space-between; }
.brand { display: flex; align-items: center; gap: 0.7rem; font-weight: 600; font-size: 1.05rem; color: var(--c-text-inverse); letter-spacing: 0.01em; }
.site-header.scrolled .brand { color: var(--c-primary); }
.brand-mark {
  width: 32px; height: 32px; flex: 0 0 32px;
  display: grid; place-items: center;
  background: var(--c-accent); color: var(--c-primary);
  font-weight: 700; font-size: 0.85rem; border-radius: 4px;
  font-family: var(--font-serif);
}
.nav { display: flex; align-items: center; gap: var(--s-6); }
.nav-links { display: flex; align-items: center; gap: var(--s-6); }
.nav-links a {
  font-size: 0.95rem; font-weight: 500; color: var(--c-text-inverse-m);
  position: relative; transition: color 0.2s var(--ease);
}
.site-header.scrolled .nav-links a { color: var(--c-text-muted); }
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 1px;
  background: var(--c-accent); transition: width 0.25s var(--ease);
}
.nav-links a:hover { color: var(--c-text-inverse); }
.site-header.scrolled .nav-links a:hover { color: var(--c-primary); }
.nav-links a:hover::after { width: 100%; }

/* Language switcher */
.lang-switch { display: flex; align-items: center; gap: 0.35rem; padding-left: var(--s-5); border-left: 1px solid var(--c-border-dark); }
.site-header.scrolled .lang-switch { border-left-color: var(--c-border); }
.lang-switch a {
  font-size: 0.82rem; font-weight: 600; letter-spacing: 0.04em;
  padding: 0.3rem 0.5rem; border-radius: 3px; color: var(--c-text-inverse-m);
  transition: all 0.2s var(--ease);
}
.site-header.scrolled .lang-switch a { color: var(--c-text-muted); }
.lang-switch a.active { background: var(--c-accent); color: var(--c-primary); }
.lang-switch a:hover:not(.active) { color: var(--c-accent); }

/* Mobile menu toggle */
.nav-toggle { display: none; width: 44px; height: 44px; align-items: center; justify-content: center; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after {
  content: ""; display: block; width: 22px; height: 1.5px; background: var(--c-text-inverse); position: relative; transition: all 0.3s var(--ease);
}
.site-header.scrolled .nav-toggle span, .site-header.scrolled .nav-toggle span::before, .site-header.scrolled .nav-toggle span::after { background: var(--c-primary); }
.nav-toggle span::before { position: absolute; top: -7px; }
.nav-toggle span::after  { position: absolute; top:  7px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: rotate(45deg); }
.nav-toggle.open span::after  { top: 0; transform: rotate(-45deg); }

/* ---------- 7. Hero ---------- */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: var(--c-primary); color: var(--c-text-inverse); overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; background-size: cover; background-position: center;
  opacity: 0.35; z-index: 0;
}
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(135deg, rgba(10,37,64,0.85) 0%, rgba(20,54,92,0.75) 55%, rgba(30,74,122,0.7) 100%);
  pointer-events: none;
}
.hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px; z-index: 2;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
  opacity: 0.5;
}
.hero .container { position: relative; z-index: 3; padding-top: var(--header-h); }
.hero::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--c-accent), transparent);
  opacity: 0.5;
}

.hero-grid { display: grid; grid-template-columns: 1fr; gap: var(--s-7); max-width: 760px; }
.hero .eyebrow { color: var(--c-accent); }
.hero .eyebrow::before { background: var(--c-accent); }
.hero h1 { color: var(--c-text-inverse); }
.hero-subtitle { color: var(--c-text-inverse-m); font-size: 1.1rem; font-weight: 400; margin-top: var(--s-2); letter-spacing: 0.02em; }
.about-subtitle { color: var(--c-text-muted); font-size: 1.1rem; font-weight: 400; margin-top: var(--s-2); letter-spacing: 0.02em; }
.hero .lead { color: var(--c-text-inverse-m); font-size: 1.25rem; max-width: 620px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: var(--s-4); }
.hero-meta {
  display: flex; flex-wrap: wrap; gap: var(--s-7); margin-top: var(--s-6);
  padding-top: var(--s-6); border-top: 1px solid var(--c-border-dark);
}
.hero-meta-item { display: flex; flex-direction: column; gap: 0.25rem; }
.hero-meta-num { font-size: 1.75rem; font-weight: 700; color: var(--c-accent); font-family: var(--font-serif); }
.hero-meta-label { font-size: 0.82rem; color: var(--c-text-inverse-m); letter-spacing: 0.05em; }

/* ---------- 8. Section heading ---------- */
.section-head { display: grid; gap: var(--s-4); margin-bottom: var(--s-8); max-width: 680px; }
.section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center .eyebrow { justify-content: center; }
.section-head h2 { margin-top: var(--s-2); }

/* ---------- 9. About ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-9); align-items: start; }
.about-visual {
  position: relative; aspect-ratio: 4 / 5; border-radius: var(--radius-lg); overflow: hidden;
  background-image: linear-gradient(180deg, rgba(10,37,64,0.3) 0%, rgba(10,37,64,0.6) 100%), url("../img/project-construction.jpg");
  background-size: cover; background-position: center;
}
.about-visual::before {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(201, 169, 97, 0.15), transparent 55%);
}
.about-text { display: grid; gap: var(--s-5); }
.about-text p { color: var(--c-text-muted); }
.about-values { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-5); margin-top: var(--s-4); }
.value-item { display: grid; gap: 0.4rem; padding-top: var(--s-4); border-top: 1px solid var(--c-border); }
.value-item h4 { color: var(--c-primary); font-size: 1rem; }
.value-item p { font-size: 0.9rem; color: var(--c-text-muted); }

/* ---------- 10. Services ---------- */
.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-5); }
.service-card {
  position: relative; padding: var(--s-7) var(--s-6); background: var(--c-bg-alt);
  border: 1px solid var(--c-border); border-radius: var(--radius-lg);
  transition: all 0.3s var(--ease); display: grid; gap: var(--s-4); align-content: start;
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--c-shadow-lg); border-color: var(--c-accent); }
.service-num {
  font-family: var(--font-serif); font-size: 2.4rem; font-weight: 700;
  color: var(--c-accent); line-height: 1; opacity: 0.85;
}
.service-card h3 { color: var(--c-primary); }
.service-card p { color: var(--c-text-muted); font-size: 0.95rem; }
.service-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.5rem; }
.service-tag { font-size: 0.75rem; padding: 0.25rem 0.6rem; background: var(--c-bg); color: var(--c-text-muted); border-radius: 99px; border: 1px solid var(--c-border); }

/* ---------- 11. Cases ---------- */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--s-5); }
.case-card {
  position: relative; aspect-ratio: 4 / 5; border-radius: var(--radius-lg); overflow: hidden;
  background-color: var(--c-primary-2); background-size: cover; background-position: center;
  color: var(--c-text-inverse);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: var(--s-6); transition: transform 0.3s var(--ease);
}
.case-card::before {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10, 37, 64, 0.85) 100%);
  transition: opacity 0.3s var(--ease);
}
.case-card > * { position: relative; z-index: 1; }
.case-card:hover { transform: translateY(-4px); }
.case-card:hover::before { background: linear-gradient(180deg, rgba(10, 37, 64, 0.35) 0%, rgba(10, 37, 64, 0.92) 100%); }
.case-tag { font-size: 0.75rem; color: var(--c-accent); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.5rem; }
.case-card h3 { color: var(--c-text-inverse); font-size: 1.15rem; }
.case-card p { color: var(--c-text-inverse-m); font-size: 0.88rem; margin-top: 0.4rem; }

/* ---------- 12. Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-9); align-items: start; }
.contact-info { display: grid; gap: var(--s-5); }
.contact-item { display: grid; grid-template-columns: 44px 1fr; gap: var(--s-4); align-items: start; padding: var(--s-4) 0; border-bottom: 1px solid var(--c-border-dark); }
.contact-icon { width: 44px; height: 44px; display: grid; place-items: center; background: rgba(201, 169, 97, 0.12); border-radius: 8px; color: var(--c-accent); }
.contact-icon svg { width: 20px; height: 20px; }
.contact-item h4 { color: var(--c-text-inverse); font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase; font-weight: 600; }
.contact-item p, .contact-item a { color: var(--c-text-inverse-m); font-size: 1rem; }
.contact-item a:hover { color: var(--c-accent); }
.contact-cta {
  background: var(--c-bg-alt); color: var(--c-text); padding: var(--s-7);
  border-radius: var(--radius-lg); display: grid; gap: var(--s-4);
}
.contact-cta h3 { color: var(--c-primary); }
.contact-cta p { color: var(--c-text-muted); font-size: 0.95rem; }
.contact-form { display: grid; gap: var(--s-4); margin-top: var(--s-3); }
.field { display: grid; gap: 0.4rem; }
.field label { font-size: 0.82rem; font-weight: 500; color: var(--c-text); letter-spacing: 0.02em; }
.field input, .field textarea {
  width: 100%; padding: 0.75rem 0.9rem; font: inherit; font-size: 0.95rem;
  background: var(--c-bg); border: 1px solid var(--c-border); border-radius: var(--radius);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}
.field input:focus, .field textarea:focus {
  outline: none; border-color: var(--c-accent); box-shadow: 0 0 0 3px rgba(201, 169, 97, 0.15);
}
.field textarea { min-height: 120px; resize: vertical; }
.form-note { font-size: 0.8rem; color: var(--c-text-muted); }

/* ---------- 13. Footer ---------- */
.site-footer { background: var(--c-bg-dark); color: var(--c-text-inverse-m); padding: var(--s-8) 0 var(--s-6); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--s-7); margin-bottom: var(--s-7); }
.footer-brand .brand { color: var(--c-text-inverse); margin-bottom: var(--s-4); }
.footer-brand p { color: var(--c-text-inverse-m); font-size: 0.9rem; max-width: 320px; }
.footer-col h5 { color: var(--c-text-inverse); font-size: 0.82rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: var(--s-4); font-weight: 600; }
.footer-col ul { display: grid; gap: 0.6rem; }
.footer-col a { color: var(--c-text-inverse-m); font-size: 0.9rem; transition: color 0.2s var(--ease); }
.footer-col a:hover { color: var(--c-accent); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: var(--s-4); padding-top: var(--s-5); border-top: 1px solid var(--c-border-dark); }
.footer-bottom p { font-size: 0.85rem; }
.footer-bottom .lang-switch { padding-left: 0; border-left: 0; }

/* ---------- 14. Reveal animation ---------- */
[data-reveal] { opacity: 0; transform: translateY(20px); transition: opacity 0.7s var(--ease), transform 0.7s var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal-delay="1"] { transition-delay: 0.08s; }
[data-reveal-delay="2"] { transition-delay: 0.16s; }
[data-reveal-delay="3"] { transition-delay: 0.24s; }
[data-reveal-delay="4"] { transition-delay: 0.32s; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  [data-reveal] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 15. 404 page ---------- */
.page-404 { background: var(--c-primary); color: var(--c-text-inverse); display: grid; place-items: center; min-height: 100vh; }
.error-main { padding: var(--s-7); text-align: center; }
.error-code { font-family: var(--font-serif); font-size: clamp(6rem, 18vw, 12rem); font-weight: 700; color: var(--c-accent); line-height: 1; }
.error-title { color: var(--c-text-inverse); margin: var(--s-4) 0 var(--s-3); }
.error-text { color: var(--c-text-inverse-m); margin: 0.3rem 0; }
.error-actions { display: flex; gap: var(--s-3); justify-content: center; flex-wrap: wrap; margin-top: var(--s-6); }

/* ---------- 16. Responsive ---------- */
@media (max-width: 960px) {
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: var(--s-7); }
  .about-visual { aspect-ratio: 16 / 9; max-height: 320px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
  .services-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 720px) {
  :root { --header-h: 64px; }
  .section { padding: var(--s-8) 0; }
  .nav-toggle { display: flex; }
  .nav {
    position: fixed; top: var(--header-h); left: 0; right: 0; bottom: 0;
    background: var(--c-primary); flex-direction: column; align-items: flex-start;
    justify-content: flex-start; gap: var(--s-5); padding: var(--s-7) var(--s-5);
    transform: translateX(100%); transition: transform 0.35s var(--ease);
    overflow-y: auto;
  }
  .nav.open { transform: none; }
  .nav-links { flex-direction: column; align-items: flex-start; gap: var(--s-5); width: 100%; }
  .nav-links a { font-size: 1.1rem; color: var(--c-text-inverse); }
  .nav-links a::after { display: none; }
  .lang-switch { padding-left: 0; border-left: 0; padding-top: var(--s-5); border-top: 1px solid var(--c-border-dark); width: 100%; }
  .lang-switch a { font-size: 0.95rem; }

  .services-grid, .cases-grid { grid-template-columns: 1fr; }
  .hero { min-height: calc(100vh - var(--header-h)); padding-top: var(--header-h); }
  .hero .lead { font-size: 1.1rem; }
  .hero-meta { gap: var(--s-5); }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { justify-content: flex-start; }
}

@media (max-width: 480px) {
  .container { padding: 0 var(--s-4); }
  .btn { width: 100%; }
  .hero-actions { width: 100%; }
  .about-values { grid-template-columns: 1fr; }
}

/* ---------- 17. Gallery ---------- */
.gallery-filters {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: var(--s-7);
}
.filter-btn {
  padding: 0.5rem 1.2rem; font-size: 0.88rem; font-weight: 500;
  background: transparent; color: var(--c-text-muted);
  border: 1px solid var(--c-border); border-radius: 99px;
  transition: all 0.25s var(--ease); cursor: pointer;
}
.filter-btn:hover { color: var(--c-primary); border-color: var(--c-primary); }
.filter-btn.active { background: var(--c-primary); color: var(--c-text-inverse); border-color: var(--c-primary); }

.gallery-group { margin-bottom: var(--s-8); }
.gallery-group:last-child { margin-bottom: 0; }
.gallery-group h3 {
  font-size: 1.4rem; color: var(--c-primary); margin-bottom: var(--s-5);
  padding-bottom: var(--s-2); border-bottom: 2px solid var(--c-accent);
  display: inline-block;
}
.gallery-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--s-3);
}
.gallery-item {
  position: relative; aspect-ratio: 4 / 3; border-radius: var(--radius); overflow: hidden;
  cursor: pointer; background: var(--c-primary-2);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}
.gallery-item.tall { aspect-ratio: 3 / 4; }
.gallery-item.wide { aspect-ratio: 16 / 9; }
.gallery-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.4s var(--ease), opacity 0.3s var(--ease);
}
.gallery-item::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(180deg, transparent 60%, rgba(10,37,64,0.5) 100%);
  opacity: 0; transition: opacity 0.3s var(--ease);
}
.gallery-item:hover { transform: translateY(-3px); box-shadow: var(--c-shadow-lg); }
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item:hover::after { opacity: 1; }
.gallery-item .gallery-zoom {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%) scale(0.8);
  width: 44px; height: 44px; display: grid; place-items: center;
  background: rgba(255,255,255,0.9); border-radius: 50%; color: var(--c-primary);
  opacity: 0; transition: all 0.3s var(--ease); z-index: 2; pointer-events: none;
}
.gallery-item:hover .gallery-zoom { opacity: 1; transform: translate(-50%, -50%) scale(1); }
.gallery-item.hidden { display: none; }

/* ---------- 18. Lightbox ---------- */
.lightbox {
  position: fixed; inset: 0; z-index: 1000; display: none;
  background: rgba(10, 15, 25, 0.95); backdrop-filter: blur(8px);
  align-items: center; justify-content: center; padding: var(--s-6);
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: 90vw; max-height: 85vh; object-fit: contain;
  border-radius: var(--radius); box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.lightbox-close {
  position: absolute; top: var(--s-5); right: var(--s-5);
  width: 48px; height: 48px; display: grid; place-items: center;
  background: rgba(255,255,255,0.1); border-radius: 50%; color: #fff;
  font-size: 1.5rem; transition: background 0.2s var(--ease); cursor: pointer; z-index: 1001;
}
.lightbox-close:hover { background: rgba(255,255,255,0.2); }
.lightbox-nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 48px; height: 48px; display: grid; place-items: center;
  background: rgba(255,255,255,0.1); border-radius: 50%; color: #fff;
  font-size: 1.3rem; transition: background 0.2s var(--ease); cursor: pointer; z-index: 1001;
}
.lightbox-nav:hover { background: rgba(255,255,255,0.2); }
.lightbox-prev { left: var(--s-5); }
.lightbox-next { right: var(--s-5); }
.lightbox-counter {
  position: absolute; bottom: var(--s-5); left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,0.6); font-size: 0.88rem; z-index: 1001;
}

/* ---------- 19. Print ---------- */
@media print {
  .site-header, .nav, .hero-actions, .contact-form, .site-footer { display: none; }
  body { background: white; color: black; }
  .hero { min-height: auto; background: white; color: black; }
}