/* ============================================================
   KHAO SOK HORIZON — design tokens
   Palette drawn from the resort's own tour-guide print material:
   soft cream paper + deep forest green ink, warm teak accent
   pulled from the room photography (balcony wood, curtains).
   ============================================================ */
:root{
  --cream:        #F7F3E7;
  --cream-soft:   #FBF8F0;
  --cream-deep:   #EFE9D6;
  --ink:          #23271E;
  --forest:       #1E4530;
  --forest-dark:  #142E20;
  --sage:         #7C9473;
  --sage-soft:    #B9C6AC;
  --teak:         #A15C35;
  --teak-soft:    #C98F63;
  --line:         rgba(30,69,48,0.16);
  --line-soft:    rgba(30,69,48,0.08);
  --shadow:       0 20px 50px -20px rgba(20,46,32,0.35);

  --font-display: "Fraunces", "Noto Serif Thai", serif;
  --font-body:    "Inter", "Noto Sans Thai", sans-serif;

  --container: 1180px;
  --gutter: clamp(20px, 5vw, 64px);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration: none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3,h4{ margin:0; font-family: var(--font-display); font-weight: 600; color: var(--forest-dark); }
p{ margin:0; }
button{ font-family: inherit; cursor:pointer; }

::selection{ background: var(--forest); color: var(--cream); }

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

:focus-visible{
  outline: 2px solid var(--teak);
  outline-offset: 3px;
}

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.eyebrow{
  font-family: var(--font-body);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--teak);
  font-weight: 600;
  display:inline-flex;
  align-items:center;
  gap: 10px;
}
.eyebrow::before{
  content:"";
  width: 22px; height:1px;
  background: var(--teak);
  display:inline-block;
}

/* ---------- buttons ---------- */
.btn{
  display: inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 15px 30px;
  border-radius: 3px;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  transition: transform .35s cubic-bezier(.2,.7,.2,1), background .3s ease, color .3s ease, border-color .3s ease;
  white-space: nowrap;
}
.btn:hover{ transform: translateY(-2px); }
.btn-primary{ background: var(--forest); color: var(--cream-soft); }
.btn-primary:hover{ background: var(--forest-dark); }
.btn-ghost{ background: transparent; color: var(--forest-dark); border-color: var(--line); }
.btn-ghost:hover{ border-color: var(--forest); background: var(--cream-deep); }
.btn-light{ background: var(--cream-soft); color: var(--forest-dark); }
.btn-light:hover{ background:#fff; }
.btn-whatsapp{ background:#22855A; color:#fff; }
.btn-whatsapp:hover{ background:#1c6f49; }
.btn-sm{ padding: 10px 18px; font-size: 0.78rem; }

/* ============================================================
   NAV
   ============================================================ */
.site-nav{
  position: fixed; top:0; left:0; right:0; z-index: 100;
  padding: 20px 0;
  transition: background .4s ease, padding .4s ease, box-shadow .4s ease;
}
.site-nav .container{ display:flex; align-items:center; justify-content:space-between; gap: 24px; }
.site-nav.is-scrolled{
  background: rgba(247,243,231,0.92);
  backdrop-filter: blur(10px);
  padding: 12px 0;
  box-shadow: 0 1px 0 var(--line);
}
.brand{ display:flex; align-items:center; gap:12px; }
.brand img{ height: 40px; width:auto; transition: filter .4s ease; }
.brand .brand-word{
  font-family: var(--font-display);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  color: #fff;
  transition: color .4s ease;
  font-weight: 600;
}
.site-nav.is-scrolled .brand .brand-word{ color: var(--forest-dark); }
.site-nav:not(.is-scrolled) .brand img{ filter: brightness(0) invert(1); }

.nav-links{ display:flex; align-items:center; gap: 34px; }
.nav-links a{
  font-size: 0.82rem; letter-spacing: 0.05em; text-transform: uppercase; font-weight:600;
  color: #fff; opacity: .9; transition: opacity .3s ease, color .3s ease;
  position:relative; padding-bottom: 3px;
}
.nav-links a::after{
  content:""; position:absolute; left:0; right:100%; bottom:0; height:1px; background:currentColor;
  transition: right .3s ease;
}
.nav-links a:hover::after, .nav-links a.active::after{ right:0; }
.site-nav.is-scrolled .nav-links a{ color: var(--forest-dark); opacity:.85; }
.nav-links a:hover{ opacity:1; }

.mobile-cta{ display:none; }
.nav-cta{ display:flex; align-items:center; gap:12px; }
.nav-wa{
  width: 42px; height:42px; border-radius:50%;
  display:flex; align-items:center; justify-content:center;
  background: rgba(255,255,255,0.14); color:#fff;
  transition: background .3s ease, transform .3s ease;
}
.site-nav.is-scrolled .nav-wa{ background: var(--cream-deep); color: var(--forest-dark); }
.nav-wa:hover{ transform: scale(1.08); }
.nav-wa svg{ width:20px; height:20px; }

.nav-toggle{
  display:none; width:42px;height:42px; border:none; background:transparent;
  flex-direction:column; justify-content:center; align-items:center; gap:5px;
  position:relative; z-index:210;
}
.nav-toggle span{ width:22px; height:2px; background:#fff; transition: all .3s ease; }
.site-nav.is-scrolled .nav-toggle span{ background: var(--forest-dark); }
body.nav-open .nav-toggle span{ background: var(--forest-dark); }
body.nav-open .nav-toggle span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2){ opacity:0; }
body.nav-open .nav-toggle span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

.nav-backdrop{
  position:fixed; inset:0; z-index:150; background: rgba(20,46,32,0.4);
  opacity:0; pointer-events:none; transition: opacity .4s ease;
}
.nav-backdrop.open{ opacity:1; pointer-events:auto; }

@media (max-width: 880px){
  .nav-links{
    position:fixed; inset: 0 0 0 auto; width: min(78vw,340px);
    background: var(--cream-soft); flex-direction:column; align-items:flex-start;
    padding: 110px 36px 40px; gap: 26px; transform: translateX(100%);
    transition: transform .45s cubic-bezier(.2,.7,.2,1); box-shadow: -20px 0 50px rgba(0,0,0,.15);
    z-index: 200;
  }
  .nav-links.open{ transform: translateX(0); }
  .nav-links a{ color: var(--forest-dark); font-size: 1rem; opacity:1; }
  .mobile-cta{ display:inline-flex; margin-top:8px; }
  .nav-toggle{ display:flex; }
  .nav-cta .btn-primary{ display:none; }
  body.nav-open{ overflow:hidden; }
}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative; min-height: 100svh; display:flex; align-items:flex-end;
  overflow:hidden; background: var(--forest-dark);
}
.hero-media{ position:absolute; inset:0; }
.hero-media img{ width:100%; height:100%; object-fit:cover; transform: scale(1.06); animation: heroZoom 18s ease-out forwards; }
@keyframes heroZoom{ to{ transform: scale(1); } }
.hero-media::after{
  content:"";
  position:absolute; inset:0;
  background: linear-gradient(180deg, rgba(20,46,32,0.35) 0%, rgba(20,46,32,0.15) 35%, rgba(15,30,21,0.78) 100%);
}
.hero-content{
  position:relative; z-index:2; width:100%;
  padding: 0 var(--gutter) 96px;
  color: var(--cream-soft);
}
.hero-content .eyebrow{ color: var(--teak-soft); }
.hero-content .eyebrow::before{ background: var(--teak-soft); }
.hero-content h1{
  color: #fff; font-weight: 500;
  font-size: clamp(2.6rem, 7vw, 5.4rem);
  line-height: 0.98;
  margin: 18px 0 22px;
  letter-spacing: -0.01em;
}
.hero-content h1 em{ font-style: italic; font-weight:300; color: var(--sage-soft); }
.hero-sub{
  max-width: 480px;
  font-size: 1.05rem;
  color: rgba(255,255,255,0.86);
  margin-bottom: 38px;
}
.hero-actions{ display:flex; gap:16px; flex-wrap:wrap; }
.hero-actions .btn-ghost{ color:#fff; border-color: rgba(255,255,255,0.4); }
.hero-actions .btn-ghost:hover{ background: rgba(255,255,255,0.12); border-color:#fff; }

.scroll-cue{
  position:absolute; right: var(--gutter); bottom: 40px; z-index:2;
  display:flex; flex-direction:column; align-items:center; gap:10px;
  color: rgba(255,255,255,0.75); font-size: 0.68rem; letter-spacing:0.2em; text-transform:uppercase;
}
.scroll-cue .line{ width:1px; height:46px; background: linear-gradient(rgba(255,255,255,0.9), rgba(255,255,255,0)); animation: scrollLine 2s ease-in-out infinite; }
@keyframes scrollLine{ 0%{ transform: scaleY(0); transform-origin: top; } 50%{ transform: scaleY(1); transform-origin: top; } 51%{ transform-origin:bottom; } 100%{ transform: scaleY(0); transform-origin: bottom; } }

/* ============================================================
   HORIZON DIVIDER (signature element)
   ============================================================ */
.horizon-divider{
  width:100%; overflow:hidden; line-height:0;
  background: var(--cream);
}
.horizon-divider.flip{ transform: scaleY(-1); }
.horizon-divider svg{ width:100%; height:auto; display:block; }
.horizon-divider path{
  fill:none; stroke: var(--forest); stroke-width:1.6; opacity:0.55;
  stroke-dasharray: 2600; stroke-dashoffset: 2600;
  transition: stroke-dashoffset 2.4s cubic-bezier(.16,.8,.2,1);
}
.horizon-divider.in-view path{ stroke-dashoffset: 0; }
.horizon-divider.dark path{ stroke: var(--cream-soft); opacity:0.5; }
.horizon-divider.dark{ background: var(--forest-dark); }

/* ============================================================
   SECTION shell
   ============================================================ */
section{ position:relative; }
.section-pad{ padding: 108px 0; }
.section-head{ max-width: 640px; margin-bottom: 56px; }
.section-head h2{
  font-size: clamp(2rem, 4vw, 3rem);
  margin-top: 16px;
  font-weight:500;
  letter-spacing:-0.01em;
}
.section-head p{ margin-top: 20px; color:#4B5245; font-size:1.02rem; max-width: 52ch; }
.section-head.center{ margin-left:auto; margin-right:auto; text-align:center; }

.reveal{ opacity:0; transform: translateY(26px); transition: opacity .8s ease, transform .8s cubic-bezier(.2,.7,.2,1); }
.reveal.in-view{ opacity:1; transform:none; }

/* ============================================================
   ABOUT STRIP
   ============================================================ */
.about{ background: var(--cream); }
.about-grid{
  display:grid; grid-template-columns: 1.15fr 0.85fr; gap: 80px; align-items:start;
}
.about-lede{
  font-family: var(--font-display); font-weight:400; font-style: italic;
  font-size: clamp(1.4rem, 2.6vw, 1.9rem); color: var(--forest-dark); line-height:1.5;
}
.about-copy{ margin-top: 24px; color:#4B5245; max-width: 54ch; }
.stat-list{ display:flex; flex-direction:column; gap: 0; border-top:1px solid var(--line); }
.stat-item{
  display:flex; justify-content:space-between; align-items:baseline;
  padding: 22px 0; border-bottom:1px solid var(--line); gap: 20px;
}
.stat-item .num{ font-family: var(--font-display); font-size:1.7rem; color: var(--forest); flex-shrink:0; }
.stat-item .label{ color:#4B5245; font-size:0.92rem; text-align:right; }

@media (max-width: 880px){
  .about-grid{ grid-template-columns: 1fr; gap: 44px; }
}

/* ============================================================
   ROOMS
   ============================================================ */
.rooms{ background: var(--cream-deep); }
.room-card{
  display:grid; grid-template-columns: 1.15fr 1fr; gap: 0;
  background: var(--cream-soft);
  border-radius: 4px; overflow:hidden;
  box-shadow: var(--shadow);
  margin-bottom: 56px;
}
.room-card:last-child{ margin-bottom:0; }
.room-card.reverse{ grid-template-columns: 1fr 1.15fr; }
.room-card.reverse .room-gallery{ order:2; }

.room-gallery{ position:relative; background: var(--cream-soft); display:flex; flex-direction:column; height:100%; }
.room-gallery .main-shot{ position:relative; flex:1; min-height: 320px; overflow:hidden; }
.room-gallery .main-shot img{ width:100%; height:100%; object-fit:cover; transition: opacity .45s ease; position:absolute; inset:0; }
.room-thumbs{ display:flex; gap:2px; }
.room-thumbs button{
  flex:1; border:none; padding:0; aspect-ratio: 1/1; overflow:hidden; background:none; opacity:.62;
  transition: opacity .25s ease;
}
.room-thumbs button.active, .room-thumbs button:hover{ opacity:1; }
.room-thumbs img{ width:100%; height:100%; object-fit:cover; }

.room-info{ padding: 48px 48px; display:flex; flex-direction:column; }
.room-tag{
  font-size:0.7rem; letter-spacing:0.18em; text-transform:uppercase; font-weight:700; color: var(--sage);
}
.room-info h3{ font-size: clamp(1.5rem,2.4vw,1.9rem); margin: 10px 0 18px; font-weight:500; }
.room-info p.desc{ color:#4B5245; font-size:0.98rem; margin-bottom: 26px; }
.room-features{ display:grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin-bottom: 34px; }
.room-features li{ font-size:0.86rem; color: var(--forest-dark); display:flex; gap:10px; align-items:flex-start; }
.room-features li svg{ flex-shrink:0; width:16px; height:16px; margin-top:2px; color: var(--teak); }
.room-actions{ margin-top:auto; display:flex; gap:14px; flex-wrap:wrap; }

@media (max-width: 880px){
  .room-card, .room-card.reverse{ grid-template-columns: 1fr; }
  .room-card.reverse .room-gallery{ order:0; }
  .room-info{ padding: 34px 26px 40px; }
}

/* ============================================================
   TOURS
   ============================================================ */
.tours{ background: var(--cream); }
.tour-grid{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.tour-card{
  background: var(--cream-soft); border-radius:4px; overflow:hidden;
  box-shadow: 0 12px 30px -18px rgba(20,46,32,0.35);
  display:flex; flex-direction:column;
  transition: transform .4s cubic-bezier(.2,.7,.2,1);
}
.tour-card:hover{ transform: translateY(-6px); }
.tour-photo{ position:relative; aspect-ratio: 5/4; overflow:hidden; background: var(--forest); }
.tour-photo img{ width:100%; height:100%; object-fit:cover; transition: transform .6s ease; }
.tour-card:hover .tour-photo img{ transform: scale(1.06); }
.tour-price{
  position:absolute; top:14px; right:14px;
  background: var(--forest-dark); color:#fff; font-size:0.72rem; font-weight:700;
  padding: 7px 12px; border-radius: 2px; letter-spacing:0.02em;
}
.tour-price span{ opacity:.7; font-weight:500; }
.tour-body{ padding: 24px 24px 26px; display:flex; flex-direction:column; flex:1; }
.tour-body .dur{ font-size:0.7rem; letter-spacing:0.14em; text-transform:uppercase; color: var(--sage); font-weight:700; margin-bottom:8px; }
.tour-body h4{ font-size:1.15rem; font-weight:600; margin-bottom:10px; }
.tour-body p{ font-size:0.88rem; color:#4B5245; margin-bottom:20px; }
.tour-body .btn{ margin-top:auto; align-self:flex-start; }

.tours-note{
  margin-top: 44px; padding-top: 28px; border-top:1px solid var(--line);
  display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap;
}
.tours-note p{ font-size:0.85rem; color:#5c6353; max-width: 60ch; }

@media (max-width: 980px){ .tour-grid{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 640px){ .tour-grid{ grid-template-columns: 1fr; } }

/* ============================================================
   GALLERY STRIP
   ============================================================ */
.gallery-strip{ background: var(--forest-dark); padding: 20px 0; overflow:hidden; }
.gallery-track{ display:flex; gap: 18px; width:max-content; animation: scrollX 42s linear infinite; }
.gallery-strip:hover .gallery-track{ animation-play-state: paused; }
.gallery-track img{ height: 320px; width:auto; border-radius:3px; }
@keyframes scrollX{ from{ transform: translateX(0); } to{ transform: translateX(-50%); } }

/* ============================================================
   GUEST REVIEWS
   ============================================================ */
.reviews{ background: var(--cream-deep); }
.reviews-widget-wrap{
  background: var(--cream-soft);
  border-radius: 6px;
  padding: 40px clamp(16px, 4vw, 40px);
  box-shadow: var(--shadow);
}
.reviews-badge{
  display:inline-flex; align-items:center; gap:10px;
  background: var(--forest); color:#fff;
  padding: 8px 16px; border-radius: 3px;
  font-size: 0.78rem; font-weight:700; letter-spacing:0.03em;
  margin-bottom: 28px;
}
.reviews-badge svg{ width:16px; height:16px; }

/* ============================================================
   CONTACT
   ============================================================ */
.contact{ background: var(--forest-dark); color: var(--cream-soft); }
.contact .eyebrow{ color: var(--teak-soft); }
.contact .eyebrow::before{ background: var(--teak-soft); }
.contact .section-head h2{ color:#fff; }
.contact .section-head p{ color: rgba(255,255,255,0.72); }

.contact-grid{ display:grid; grid-template-columns: 1.1fr 0.9fr; gap: 70px; align-items:center; }
.contact-list{ display:flex; flex-direction:column; gap: 26px; margin-bottom: 38px; }
.contact-item{ display:flex; gap:18px; align-items:flex-start; }
.contact-item .ic{
  width:44px; height:44px; border-radius:50%; flex-shrink:0;
  background: rgba(255,255,255,0.08); display:flex; align-items:center; justify-content:center; color: var(--sage-soft);
}
.contact-item .ic svg{ width:20px; height:20px; }
.contact-item h5{ font-family: var(--font-body); font-size:0.72rem; letter-spacing:0.14em; text-transform:uppercase; color: rgba(255,255,255,0.5); margin-bottom:5px; font-weight:600; }
.contact-item p, .contact-item a{ font-size:1rem; color:#fff; }
.contact-item a:hover{ color: var(--sage-soft); }

.qr-card{
  background: var(--cream-soft); color: var(--ink);
  border-radius: 6px; padding: 38px 32px; text-align:center;
  box-shadow: var(--shadow);
  max-width: 340px; margin: 0 auto;
}
.qr-card img.qr{ width: 190px; height:190px; margin: 18px auto 22px; border-radius:4px; }
.qr-card h4{ font-size:1.1rem; }
.qr-card p{ font-size:0.85rem; color:#5c6353; margin: 8px 0 22px; }

@media (max-width: 880px){ .contact-grid{ grid-template-columns:1fr; gap:48px; } }

/* ============================================================
   FLOATING WHATSAPP
   ============================================================ */
.wa-float{
  position:fixed; right:22px; bottom:22px; z-index:90;
  width:58px; height:58px; border-radius:50%;
  background:#22855A; color:#fff; display:flex; align-items:center; justify-content:center;
  box-shadow: 0 10px 30px -8px rgba(0,0,0,0.5);
  transition: transform .3s ease;
}
.wa-float:hover{ transform: scale(1.08); }
.wa-float svg{ width:28px; height:28px; }

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{ background: var(--forest-dark); color: rgba(255,255,255,0.6); padding: 50px 0 30px; border-top: 1px solid rgba(255,255,255,0.08); }
.footer-top{ display:flex; justify-content:space-between; align-items:center; gap: 24px; flex-wrap:wrap; padding-bottom: 34px; }
.footer-brand{ display:flex; align-items:center; gap:12px; }
.footer-brand img{ height:34px; filter: brightness(0) invert(1); opacity:.9; }
.footer-brand span{ font-family: var(--font-display); color:#fff; font-size:1rem; }
.footer-links{ display:flex; gap:28px; flex-wrap:wrap; }
.footer-links a{ font-size:0.82rem; text-transform:uppercase; letter-spacing:0.05em; color: rgba(255,255,255,0.72); }
.footer-links a:hover{ color:#fff; }
.footer-bottom{ padding-top: 24px; border-top:1px solid rgba(255,255,255,0.08); display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap; font-size:0.78rem; }

/* ============================================================
   TOUR DETAIL PAGE
   ============================================================ */
.page-hero{
  padding: 170px 0 70px; background: var(--forest-dark); color:#fff; text-align:center;
}
.page-hero .eyebrow{ justify-content:center; color: var(--teak-soft); }
.page-hero .eyebrow::before{ background: var(--teak-soft); }
.page-hero h1{ color:#fff; font-size: clamp(2.2rem,5vw,3.4rem); margin:18px 0 16px; font-weight:500; }
.page-hero p{ color: rgba(255,255,255,0.75); max-width: 56ch; margin: 0 auto; }

.summary-table{ background: var(--cream-soft); border-radius:6px; overflow:hidden; box-shadow: var(--shadow); }
.summary-row{
  display:grid; grid-template-columns: 1.6fr 1fr 1fr 0.9fr; gap:16px; align-items:center;
  padding: 18px 26px; border-bottom:1px solid var(--line);
}
.summary-row:last-child{ border-bottom:none; }
.summary-row.head{ background: var(--forest); color:#fff; font-size:0.72rem; text-transform:uppercase; letter-spacing:0.1em; font-weight:700; }
.summary-row .name{ font-weight:600; color: var(--forest-dark); font-family: var(--font-display); font-size:1.02rem; }
.summary-row.head .name{ color:#fff; font-family:var(--font-body); }
.summary-row .price{ font-weight:700; color: var(--teak); }
@media (max-width: 720px){
  .summary-row{ grid-template-columns: 1fr 1fr; row-gap:6px; }
  .summary-row .name{ grid-column: 1/-1; }
}

.flyer-gallery{
  display:grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.flyer-item{ border-radius:4px; overflow:hidden; box-shadow: 0 10px 26px -16px rgba(20,46,32,0.4); cursor: zoom-in; background:#000; }
.flyer-item img{ width:100%; display:block; transition: transform .4s ease; }
.flyer-item:hover img{ transform: scale(1.03); }
@media (max-width: 880px){ .flyer-gallery{ grid-template-columns: repeat(2,1fr); } }
@media (max-width: 520px){ .flyer-gallery{ grid-template-columns: 1fr; } }

.lightbox{
  position:fixed; inset:0; background: rgba(15,26,18,0.92); z-index:200;
  display:flex; align-items:center; justify-content:center; padding: 30px;
  opacity:0; pointer-events:none; transition: opacity .3s ease;
}
.lightbox.open{ opacity:1; pointer-events:auto; }
.lightbox img{ max-width: min(700px,90vw); max-height:88vh; border-radius:4px; box-shadow: 0 30px 80px rgba(0,0,0,0.5); }
.lightbox-close{
  position:absolute; top:24px; right:28px; width:44px; height:44px; border-radius:50%;
  background: rgba(255,255,255,0.1); color:#fff; border:none; display:flex; align-items:center; justify-content:center;
}
.lightbox-close:hover{ background: rgba(255,255,255,0.2); }
.lightbox-nav{
  position:absolute; top:50%; transform:translateY(-50%);
  width:48px; height:48px; border-radius:50%; background: rgba(255,255,255,0.1); color:#fff; border:none;
  display:flex; align-items:center; justify-content:center;
}
.lightbox-nav:hover{ background: rgba(255,255,255,0.2); }
.lightbox-prev{ left:24px; } .lightbox-next{ right:24px; }
@media (max-width: 640px){ .lightbox-nav{ width:38px;height:38px; } .lightbox-prev{left:8px;} .lightbox-next{right:8px;} }

/* generic small helpers */
.center-cta{ text-align:center; margin-top: 54px; }
.mt-lg{ margin-top: 80px; }