/* ==========================================================================
   VIVO NIXON ENGINEERING — CORE STYLESHEET
   Design language: "Engineering Dossier" — a premium technical-editorial
   system that borrows its structure from schematic drawing sheets:
   hairline rules, corner registration marks, and reference annotations,
   rendered in warm ivory, near-black ink and a single restrained gold.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root {
  /* Colour */
  --c-white:      #FFFFFF;
  --c-ivory:      #FCFAF5;   /* primary background, warmer than pure white */
  --c-ink:        #16150F;   /* near-black, warm — body copy, headings */
  --c-slate:      #5B584C;   /* secondary copy */
  --c-gold:       #C8A64B;   /* primary accent */
  --c-gold-deep:  #96762C;   /* hover / pressed states */
  --c-gold-pale:  #F4EDDA;   /* tinted section backgrounds */
  --c-line:       #E3DDC9;   /* hairline borders, warm grey-gold */
  --c-line-dark:  rgba(255,255,255,0.18);

  /* Type */
  --f-display:    'EB Garamond', 'Garamond', 'Times New Roman', serif;
  --f-utility:    'Jost', 'Helvetica Neue', Arial, sans-serif;

  /* Scale */
  --fs-hero:      clamp(2.6rem, 5vw, 5.2rem);
  --fs-h1:        clamp(2.1rem, 3.6vw, 3.4rem);
  --fs-h2:        clamp(1.6rem, 2.4vw, 2.3rem);
  --fs-h3:        1.4rem;
  --fs-body:      1.05rem;
  --fs-small:     0.86rem;
  --fs-eyebrow:   0.78rem;

  /* Spacing */
  --sp-section:   clamp(4rem, 8vw, 8rem);
  --sp-gap:       clamp(1.5rem, 3vw, 3rem);
  --measure:      1240px;

  /* Motion */
  --ease: cubic-bezier(.22,.61,.36,1);
}

/* --------------------------------------------------------------------------
   2. RESET
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--c-ivory);
  color: var(--c-ink);
  font-family: var(--f-display);
  font-size: var(--fs-body);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
button { font-family: inherit; cursor: pointer; }
h1, h2, h3, h4 { margin: 0 0 0.6em; font-weight: 500; letter-spacing: -0.01em; }
p { margin: 0 0 1.2em; color: var(--c-slate); }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}

/* focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--c-gold-deep);
  outline-offset: 3px;
}

/* --------------------------------------------------------------------------
   3. UTILITY TYPE — eyebrows, labels, nav
   -------------------------------------------------------------------------- */
.eyebrow {
  font-family: var(--f-utility);
  font-size: var(--fs-eyebrow);
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
  display: inline-flex;
  align-items: center;
  gap: 0.75em;
  margin-bottom: 1em;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--c-gold-deep);
  display: inline-block;
}

/* Reference / coordinate marks — the site's signature schematic device */
.ref-mark {
  position: absolute;
  font-family: var(--f-utility);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--c-gold-deep);
  text-transform: uppercase;
  opacity: 0.85;
  white-space: nowrap;
}

/* Corner registration brackets — echo engineering schematic frames */
.bracket-frame { position: relative; }
.bracket-frame::before,
.bracket-frame::after,
.bracket-frame span.bl,
.bracket-frame span.br {
  content: "";
  position: absolute;
  width: 22px;
  height: 22px;
  border: 1.5px solid var(--c-gold);
  z-index: 3;
}
.bracket-frame::before { top: -1px; left: -1px; border-right: none; border-bottom: none; }
.bracket-frame::after  { top: -1px; right: -1px; border-left: none; border-bottom: none; }
.bracket-frame span.bl { bottom: -1px; left: -1px; border-right: none; border-top: none; }
.bracket-frame span.br { bottom: -1px; right: -1px; border-left: none; border-top: none; }

/* --------------------------------------------------------------------------
   4. LAYOUT PRIMITIVES
   -------------------------------------------------------------------------- */
.wrap { max-width: var(--measure); margin: 0 auto; padding: 0 clamp(1.25rem, 4vw, 3rem); }
.section { padding: var(--sp-section) 0; position: relative; }
.section--tight { padding: clamp(2.5rem, 5vw, 4rem) 0; }
.section--ink { background: var(--c-ink); color: var(--c-ivory); }
.section--ink p { color: rgba(252,250,245,0.72); }
.section--gold { background: var(--c-gold-pale); }
.hr {
  border: none;
  border-top: 1px solid var(--c-line);
  margin: 0;
}
.hr--dark { border-top: 1px solid var(--c-line-dark); }

.grid { display: grid; gap: var(--sp-gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--f-utility);
  font-size: var(--fs-small);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 0.95em 1.9em;
  border: 1px solid currentColor;
  transition: background 0.35s var(--ease), color 0.35s var(--ease), border-color .35s var(--ease);
}
.btn--primary { background: var(--c-ink); color: var(--c-ivory); border-color: var(--c-ink); }
.btn--primary:hover { background: var(--c-gold); border-color: var(--c-gold); color: var(--c-ink); }
.btn--ghost { background: transparent; color: var(--c-ink); }
.btn--ghost:hover { background: var(--c-ink); color: var(--c-ivory); }
.btn--on-dark { color: var(--c-ivory); }
.btn--on-dark:hover { background: var(--c-gold); border-color: var(--c-gold); color: var(--c-ink); }

/* --------------------------------------------------------------------------
   5. HEADER
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(252,250,245,0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-line);
  transition: box-shadow .3s var(--ease);
}
.site-header.is-scrolled { box-shadow: 0 8px 24px rgba(20,19,14,0.06); }

.header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.1rem clamp(1.25rem, 4vw, 3rem);
}
.logo {
  font-family: var(--f-display);
  font-size: 1.5rem;
  letter-spacing: 0.04em;
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.logo strong { font-weight: 600; }
.logo small {
  font-family: var(--f-utility);
  font-size: 0.6rem;
  letter-spacing: 0.32em;
  color: var(--c-gold-deep);
  margin-top: 0.35em;
}

.main-nav { display: flex; align-items: center; gap: 2.1rem; }
.main-nav > ul { display: flex; gap: 2.1rem; }
.main-nav a {
  font-family: var(--f-utility);
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  position: relative;
  padding: 0.4rem 0;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: var(--c-gold-deep);
  transition: width .3s var(--ease);
}
.main-nav a:hover::after, .main-nav a.is-active::after { width: 100%; }
.has-dropdown { position: relative; }

/* mega menu */
.mega-menu {
  position: absolute;
  top: calc(100% + 1.2rem);
  left: 50%;
  transform: translateX(-50%);
  width: min(960px, 90vw);
  background: var(--c-white);
  border: 1px solid var(--c-line);
  box-shadow: 0 24px 48px rgba(20,19,14,0.1);
  padding: 2.2rem;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.8rem;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(8px);
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}
.has-dropdown:hover .mega-menu,
.has-dropdown:focus-within .mega-menu {
  opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0);
}
.mega-col .mega-title {
  font-family: var(--f-utility);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-gold-deep);
  margin-bottom: 0.9rem;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--c-line);
}
.mega-col a { display: block; padding: 0.4rem 0; font-size: 0.95rem; text-transform: none; letter-spacing: normal; }
.mega-col a:hover { color: var(--c-gold-deep); }

.header-actions { display: flex; align-items: center; gap: 1.1rem; }
.icon-btn { width: 20px; height: 20px; display: inline-flex; align-items: center; justify-content: center; }
.header-actions .btn { padding: 0.7em 1.4em; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; padding: 0.4rem; }
.nav-toggle span { width: 24px; height: 1.5px; background: var(--c-ink); }

/* --------------------------------------------------------------------------
   6. HERO SLIDER
   -------------------------------------------------------------------------- */
.hero-slider {
  position: relative;
  height: 92vh;
  min-height: 620px;
  overflow: hidden;
  background: var(--c-ink);
}
.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity 1.1s var(--ease), visibility 1.1s;
  display: flex;
  align-items: flex-end;
}
.hero-slide.is-active { opacity: 1; visibility: visible; z-index: 2; }
.hero-slide__media {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.08);
  transition: transform 7s linear;
}
.hero-slide.is-active .hero-slide__media { transform: scale(1); }
.hero-slide__scrim {
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(15,14,10,0.88) 0%, rgba(15,14,10,0.35) 48%, rgba(15,14,10,0.55) 100%);
}
.hero-slide__content {
  position: relative;
  z-index: 2;
  color: var(--c-ivory);
  padding: 0 clamp(1.25rem, 4vw, 3rem) clamp(3.5rem, 8vw, 6rem);
  max-width: 900px;
}
.hero-slide__eyebrow {
  font-family: var(--f-utility);
  font-size: 0.78rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--c-gold);
  margin-bottom: 1.3rem;
  display: flex;
  align-items: center;
  gap: 0.9em;
}
.hero-slide__eyebrow::before { content: ""; width: 40px; height: 1px; background: var(--c-gold); }
.hero-slide__title {
  font-size: var(--fs-hero);
  line-height: 1.05;
  margin-bottom: 0.7rem;
  font-weight: 500;
}
.hero-slide__desc { color: rgba(252,250,245,0.82); max-width: 620px; font-size: 1.08rem; margin-bottom: 2rem; }
.hero-slide__cta { display: flex; gap: 1rem; flex-wrap: wrap; }

.hero-controls {
  position: absolute;
  z-index: 5;
  right: clamp(1.25rem, 4vw, 3rem);
  bottom: clamp(3.5rem, 8vw, 6rem);
  display: flex;
  gap: 0.9rem;
}
.hero-controls button {
  width: 42px; height: 42px;
  border: 1px solid rgba(252,250,245,0.4);
  background: transparent;
  color: var(--c-ivory);
  display: flex; align-items: center; justify-content: center;
  transition: background .3s var(--ease), border-color .3s var(--ease);
}
.hero-controls button:hover { background: var(--c-gold); border-color: var(--c-gold); color: var(--c-ink); }

.hero-index {
  position: absolute;
  left: clamp(1.25rem, 4vw, 3rem);
  bottom: clamp(3.5rem, 8vw, 6rem);
  z-index: 5;
  display: flex;
  gap: 0.6rem;
  font-family: var(--f-utility);
  color: var(--c-ivory);
}
.hero-index .dash { display:inline-block; width:34px; height:2px; background: rgba(252,250,245,0.35); align-self:center; cursor:pointer; transition: background .3s; }
.hero-index .dash.is-active { background: var(--c-gold); }

.hero-scroll-cue {
  position: absolute;
  z-index: 5;
  left: 50%;
  bottom: 1.6rem;
  transform: translateX(-50%);
  font-family: var(--f-utility);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(252,250,245,0.6);
  writing-mode: vertical-rl;
  display: flex; align-items: center; gap: .8rem;
}
.hero-scroll-cue::after { content:""; width:1px; height:36px; background: rgba(252,250,245,0.4); }

/* --------------------------------------------------------------------------
   7. PAGE HERO (interior pages)
   -------------------------------------------------------------------------- */
.page-hero {
  position: relative;
  padding: clamp(6rem,14vw,9rem) 0 clamp(3rem,6vw,4.5rem);
  background: var(--c-ink);
  color: var(--c-ivory);
  overflow: hidden;
}
.page-hero__media { position:absolute; inset:0; background-size:cover; background-position:center; opacity:.28; }
.page-hero .wrap { position: relative; z-index: 2; }
.breadcrumb { font-family: var(--f-utility); font-size: .78rem; letter-spacing:.1em; text-transform:uppercase; color: rgba(252,250,245,.6); margin-bottom:1.2rem; }
.breadcrumb a:hover { color: var(--c-gold); }
.page-hero h1 { font-size: var(--fs-h1); max-width: 820px; }
.page-hero p.lede { color: rgba(252,250,245,.78); max-width: 640px; font-size: 1.1rem; }

/* --------------------------------------------------------------------------
   8. STATS / COUNTERS
   -------------------------------------------------------------------------- */
.stat-strip { display: grid; grid-template-columns: repeat(4,1fr); border-top: 1px solid var(--c-line-dark); border-bottom: 1px solid var(--c-line-dark); }
.stat-strip .stat { padding: 2.4rem 1.5rem; text-align:center; border-left: 1px solid var(--c-line-dark); }
.stat-strip .stat:first-child { border-left:none; }
.stat .num { font-size: clamp(2.2rem,4vw,3.2rem); color: var(--c-gold); display:block; font-weight:500; }
.stat .label { font-family: var(--f-utility); font-size:.75rem; letter-spacing:.12em; text-transform:uppercase; color: rgba(252,250,245,.7); margin-top:.5rem; display:block; }

/* --------------------------------------------------------------------------
   9. CARDS
   -------------------------------------------------------------------------- */
.card {
  background: var(--c-white);
  border: 1px solid var(--c-line);
  padding: 2.2rem;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
}
.card:hover { transform: translateY(-6px); box-shadow: 0 24px 40px rgba(20,19,14,0.08); border-color: var(--c-gold); }
.card .mark { font-family: var(--f-utility); font-size:.72rem; letter-spacing:.14em; color: var(--c-gold-deep); margin-bottom:1rem; display:block; }
.card h3 { font-size: 1.3rem; margin-bottom: .6rem; }
.card p { margin-bottom: 1.2rem; }
.card a.link { font-family: var(--f-utility); font-size:.78rem; letter-spacing:.1em; text-transform:uppercase; border-bottom:1px solid var(--c-gold-deep); padding-bottom:.2em; }

.media-card { position: relative; overflow: hidden; }
.media-card__img { height: 320px; background-size: cover; background-position: center; transition: transform .8s var(--ease); }
.media-card:hover .media-card__img { transform: scale(1.06); }
.media-card__body { padding: 1.6rem 1.8rem; background: var(--c-white); border: 1px solid var(--c-line); border-top: none; }

/* --------------------------------------------------------------------------
   10. TABS / ACCORDION (FAQ, service detail)
   -------------------------------------------------------------------------- */
.tabs { display:flex; gap: 0; flex-wrap:wrap; border-bottom:1px solid var(--c-line); margin-bottom:2.2rem; }
.tab-btn {
  font-family: var(--f-utility); font-size:.82rem; letter-spacing:.08em; text-transform:uppercase;
  padding: 1rem 1.6rem; background:none; border:none; border-bottom: 2px solid transparent; color: var(--c-slate);
  transition: color .3s, border-color .3s;
}
.tab-btn.is-active, .tab-btn:hover { color: var(--c-ink); border-color: var(--c-gold); }
.tab-panel { display:none; }
.tab-panel.is-active { display:block; animation: fadeUp .5s var(--ease); }

.accordion-item { border-bottom: 1px solid var(--c-line); }
.accordion-trigger {
  width:100%; display:flex; align-items:center; justify-content:space-between;
  background:none; border:none; text-align:left; padding: 1.4rem 0;
  font-family: var(--f-display); font-size: 1.1rem; color: var(--c-ink);
}
.accordion-trigger .plus { font-family: var(--f-utility); font-size:1.3rem; color: var(--c-gold-deep); transition: transform .3s; }
.accordion-item.is-open .plus { transform: rotate(45deg); }
.accordion-panel { max-height:0; overflow:hidden; transition: max-height .4s var(--ease); }
.accordion-panel__inner { padding-bottom: 1.4rem; }

/* --------------------------------------------------------------------------
   11. TESTIMONIALS
   -------------------------------------------------------------------------- */
.testimonial-slider { position:relative; max-width: 780px; margin: 0 auto; text-align:center; }
.testimonial { display:none; }
.testimonial.is-active { display:block; animation: fadeUp .6s var(--ease); }
.testimonial blockquote { font-size: 1.5rem; font-style: italic; margin: 0 0 1.6rem; line-height:1.5; }
.testimonial cite { font-family: var(--f-utility); font-style:normal; font-size:.8rem; letter-spacing:.1em; text-transform:uppercase; color: var(--c-gold-deep); }
.testimonial-dots { display:flex; justify-content:center; gap:.6rem; margin-top:2rem; }
.testimonial-dots button { width:8px; height:8px; border-radius:50%; border:1px solid var(--c-gold-deep); background:transparent; padding:0; }
.testimonial-dots button.is-active { background: var(--c-gold-deep); }

/* --------------------------------------------------------------------------
   12. GALLERY / PROJECT FILTER
   -------------------------------------------------------------------------- */
.filter-bar { display:flex; flex-wrap:wrap; gap:.8rem; margin-bottom: 2.5rem; }
.filter-btn {
  font-family: var(--f-utility); font-size:.78rem; letter-spacing:.08em; text-transform:uppercase;
  padding:.6em 1.3em; border:1px solid var(--c-line); background:transparent; color: var(--c-slate);
  transition: all .3s var(--ease);
}
.filter-btn.is-active, .filter-btn:hover { border-color: var(--c-ink); color: var(--c-ink); background: var(--c-white); }
.grid-masonry { columns: 3 240px; column-gap: 1.5rem; }
.grid-masonry .media-card { break-inside: avoid; margin-bottom: 1.5rem; }
.hidden-item { display:none !important; }

/* lightbox */
.lightbox { position:fixed; inset:0; background: rgba(15,14,10,0.94); z-index:1000; display:none; align-items:center; justify-content:center; padding: 3rem; }
.lightbox.is-open { display:flex; }
.lightbox img { max-height: 84vh; max-width: 90vw; border: 1px solid rgba(255,255,255,.2); }
.lightbox-close { position:absolute; top:2rem; right:2rem; color:#fff; background:none; border:1px solid rgba(255,255,255,.4); width:44px; height:44px; }

/* --------------------------------------------------------------------------
   13. FORMS
   -------------------------------------------------------------------------- */
.field { margin-bottom: 1.5rem; }
.field label { display:block; font-family: var(--f-utility); font-size:.75rem; letter-spacing:.1em; text-transform:uppercase; color: var(--c-slate); margin-bottom:.6rem; }
.field input, .field select, .field textarea {
  width:100%; padding: .95em 1em; background: var(--c-white); border: 1px solid var(--c-line);
  font-family: var(--f-display); font-size: 1rem; color: var(--c-ink); transition: border-color .3s;
}
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--c-gold-deep); outline:none; }
.field textarea { resize: vertical; min-height: 140px; }
.form-note { font-size:.82rem; color: var(--c-slate); }
.form-success { display:none; padding: 1.2rem 1.4rem; background: var(--c-gold-pale); border-left: 3px solid var(--c-gold-deep); margin-bottom:1.5rem; }
.form-success.is-visible { display:block; }

/* --------------------------------------------------------------------------
   14. FOOTER
   -------------------------------------------------------------------------- */
.site-footer { background: var(--c-ink); color: rgba(252,250,245,.75); padding-top: var(--sp-section); }
.footer-grid { display:grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 2.5rem; padding-bottom: 3rem; }
.footer-grid h4 { color: var(--c-ivory); font-family: var(--f-utility); font-size:.78rem; letter-spacing:.14em; text-transform:uppercase; margin-bottom:1.4rem; }
.footer-grid ul li { margin-bottom:.7rem; }
.footer-grid a:hover { color: var(--c-gold); }
.footer-logo { font-family: var(--f-display); font-size:1.6rem; color: var(--c-ivory); margin-bottom:1rem; }
.footer-social { display:flex; gap: .9rem; margin-top:1.4rem; }
.footer-social a { width:36px; height:36px; border:1px solid rgba(252,250,245,.25); display:flex; align-items:center; justify-content:center; transition: all .3s; }
.footer-social a:hover { background: var(--c-gold); border-color: var(--c-gold); color: var(--c-ink); }
.newsletter-form { display:flex; border-bottom:1px solid rgba(252,250,245,.3); padding-bottom:.6rem; margin-top:.5rem; }
.newsletter-form input { flex:1; background:none; border:none; color: var(--c-ivory); font-family: var(--f-display); padding:.4em 0; }
.newsletter-form input::placeholder { color: rgba(252,250,245,.45); }
.newsletter-form button { background:none; border:none; color: var(--c-gold); font-family: var(--f-utility); font-size:.75rem; letter-spacing:.1em; text-transform:uppercase; }
.footer-bottom { border-top:1px solid rgba(252,250,245,.14); padding: 1.6rem 0; display:flex; justify-content:space-between; flex-wrap:wrap; gap:1rem; font-size:.82rem; }
.footer-bottom a:hover { color: var(--c-gold); }

/* WhatsApp float */
.whatsapp-float {
  position: fixed; bottom: 1.8rem; right: 1.8rem; z-index: 90;
  width: 56px; height: 56px; border-radius: 50%;
  background: var(--c-ink); border: 1px solid var(--c-gold);
  display:flex; align-items:center; justify-content:center; color: var(--c-gold);
  box-shadow: 0 12px 28px rgba(20,19,14,.25);
  transition: transform .3s var(--ease);
}
.whatsapp-float:hover { transform: scale(1.08); }

/* back to top */
.back-to-top {
  position: fixed; bottom: 1.8rem; left: 1.8rem; z-index: 90;
  width: 44px; height: 44px; background: var(--c-ivory); border: 1px solid var(--c-line);
  display:flex; align-items:center; justify-content:center;
  opacity:0; visibility:hidden; transform: translateY(10px);
  transition: all .35s var(--ease);
}
.back-to-top.is-visible { opacity:1; visibility:visible; transform:none; }

/* --------------------------------------------------------------------------
   15. LOADER
   -------------------------------------------------------------------------- */
.page-loader {
  position: fixed; inset:0; z-index: 2000; background: var(--c-ivory);
  display:flex; align-items:center; justify-content:center; flex-direction:column; gap:1rem;
  transition: opacity .6s var(--ease), visibility .6s;
}
.page-loader.is-hidden { opacity:0; visibility:hidden; }
.page-loader .loader-mark { font-family: var(--f-display); font-size:1.1rem; letter-spacing:.08em; }
.page-loader .loader-bar { width: 160px; height:1px; background: var(--c-line); position:relative; overflow:hidden; }
.page-loader .loader-bar::after { content:""; position:absolute; left:-40%; width:40%; height:100%; background: var(--c-gold); animation: loaderSweep 1.1s ease-in-out infinite; }
@keyframes loaderSweep { 0% { left:-40%; } 50% { left: 60%; } 100% { left: 100%; } }

/* --------------------------------------------------------------------------
   16. GENERIC ANIMATIONS
   -------------------------------------------------------------------------- */
@keyframes fadeUp { from { opacity:0; transform: translateY(16px);} to { opacity:1; transform:none; } }
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .8s var(--ease), transform .8s var(--ease); }
.reveal.is-visible { opacity: 1; transform: none; }

/* progress bar (energy audit / process) */
.progress { height: 4px; background: var(--c-line); position:relative; }
.progress span { position:absolute; inset:0 auto 0 0; background: var(--c-gold); width:0%; transition: width 1.2s var(--ease); }

/* 404 */
.error-page { min-height: 70vh; display:flex; align-items:center; justify-content:center; text-align:center; }
.error-page .code { font-size: clamp(5rem,14vw,10rem); color: var(--c-gold); line-height:1; }