:root {
  --purple: #4B2A8F;
  --purple-dark: #371f6b;
  --purple-soft: #f3eefc;
  --yellow: #FFC400;
  --orange: #F7931E;
  --white: #FFFFFF;
  --ink: #1d1730;
  --muted: #6b6480;
  --border: #e7e2f2;
  --radius: 16px;
  --shadow: 0 18px 40px rgba(75, 42, 143, 0.14);
  --shadow-sm: 0 8px 20px rgba(75, 42, 143, 0.10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "Poppins", system-ui, Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.65;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
.container { width: min(1140px, 92%); margin: 0 auto; }

/* Top bar */
.topbar { background: var(--purple-dark); color: #efe9ff; font-size: .85rem; }
.topbar-inner { display: flex; justify-content: space-between; align-items: center; height: 38px; }

/* Navbar */
.navbar {
  position: sticky; top: 0; z-index: 60; background: var(--white);
  border-bottom: 1px solid var(--border); transition: box-shadow .3s;
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 88px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  display: grid; place-items: center; width: 46px; height: 46px; border-radius: 12px;
  background: linear-gradient(135deg, var(--purple), var(--orange));
  color: var(--yellow); font-weight: 800; font-size: 1.1rem;
}
.brand-text { font-weight: 800; font-size: 1.3rem; line-height: 1; color: var(--purple); }
.brand-text small { display: block; font-size: .62rem; font-weight: 600; letter-spacing: 1.5px; color: var(--muted); text-transform: uppercase; margin-top: 3px; }
.brand-logo { height: 68px; width: auto; }
.nav-links { list-style: none; display: flex; gap: 26px; align-items: center; }
.nav-links a { color: var(--ink); font-weight: 500; transition: color .2s; }
.nav-links a:hover { color: var(--purple); }
.nav-cta {
  background: var(--yellow); color: var(--purple) !important; font-weight: 700;
  padding: 10px 18px; border-radius: 999px; transition: transform .15s, box-shadow .2s;
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(255, 196, 0, .45); }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; }
.nav-toggle span { width: 26px; height: 3px; border-radius: 3px; background: var(--purple); transition: .3s; }

/* Buttons */
.btn {
  display: inline-block; padding: 14px 26px; border-radius: 999px; font-weight: 700;
  cursor: pointer; border: 2px solid transparent; transition: transform .15s, box-shadow .2s, background .2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--orange); color: #fff; box-shadow: 0 10px 24px rgba(247, 147, 30, .35); }
.btn-primary:hover { background: #e07f12; }
.btn-yellow { background: var(--yellow); color: var(--purple); }
.btn-yellow:hover { box-shadow: 0 10px 24px rgba(255, 196, 0, .45); }
.btn-outline { border-color: var(--purple); color: var(--purple); background: transparent; }
.btn-outline:hover { background: var(--purple); color: #fff; }

/* Hero */
.hero {
  background: radial-gradient(1200px 500px at 110% -10%, rgba(255, 196, 0, .18), transparent 60%),
              linear-gradient(180deg, var(--purple-soft), var(--white));
  padding: 70px 0 90px;
}
.hero-inner { display: grid; grid-template-columns: 1fr; gap: 38px; align-items: center; }
.badge {
  display: inline-block; background: #fff; border: 1px solid var(--border);
  color: var(--purple); font-weight: 600; font-size: .85rem; padding: 7px 14px; border-radius: 999px; box-shadow: var(--shadow-sm);
}
.hero-text h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); line-height: 1.05; margin: 18px 0 16px; font-weight: 800; color: var(--purple); }
.hl { color: var(--orange); position: relative; }
.hero-text h1 .hl::after { content: ""; position: absolute; left: 0; right: 0; bottom: 6px; height: 12px; background: var(--yellow); z-index: -1; opacity: .65; }
.lead { color: var(--muted); font-size: 1.12rem; max-width: 48ch; }
.hero-actions { display: flex; gap: 14px; margin: 28px 0 20px; flex-wrap: wrap; }
.hero-points { display: flex; gap: 18px; flex-wrap: wrap; color: var(--purple); font-weight: 600; font-size: .92rem; }
.hero-image { position: relative; }
.hero-image::before {
  content: ""; position: absolute; inset: -16px -16px auto auto; width: 70%; height: 70%;
  background: radial-gradient(circle at 70% 30%, rgba(255, 196, 0, .35), transparent 70%);
  filter: blur(8px); z-index: -1;
}
.hero-image img {
  width: 100%; border-radius: 24px; box-shadow: var(--shadow);
  border: 5px solid #fff; transition: transform .3s, box-shadow .3s;
}
.hero-image img:hover { transform: translateY(-6px); box-shadow: 0 30px 60px rgba(75, 42, 143, .28); }

/* Trust strip */
.trust { background: var(--purple); color: #fff; padding: 20px 0; }
.trust-inner { display: flex; align-items: center; gap: 26px; flex-wrap: wrap; justify-content: center; }
.trust-inner > span { font-weight: 600; opacity: .85; }
.trust-logos { display: flex; gap: 30px; flex-wrap: wrap; }
.trust-logos span { font-weight: 800; font-size: 1.15rem; opacity: .8; letter-spacing: .5px; }

/* Sections */
.section { padding: 84px 0; }
.section-soft { background: var(--purple-soft); }
.section-head { text-align: center; margin-bottom: 50px; }
.eyebrow { color: var(--orange); font-weight: 700; letter-spacing: 1.5px; text-transform: uppercase; font-size: .82rem; }
.section-head h2, .why-text h2, .cta h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); color: var(--purple); margin-top: 8px; font-weight: 800; }
.section-sub { color: var(--muted); margin-top: 10px; }

/* Service cards Grid */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 32px 26px; transition: transform .2s, box-shadow .2s, border-color .2s; position: relative; overflow: hidden;
}
.card::before { content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 5px; background: linear-gradient(90deg, var(--purple), var(--yellow), var(--orange)); transform: scaleX(0); transform-origin: left; transition: transform .3s; }
.card:hover { transform: translateY(-8px); box-shadow: var(--shadow); border-color: transparent; }
.card:hover::before { transform: scaleX(1); }

/* Premium circular icon badge, with a distinct accent per service */
.card-icon {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  color: var(--purple);
  background: radial-gradient(circle at 32% 28%, #fff, var(--purple-soft) 75%);
  box-shadow: inset 0 0 0 1px rgba(75, 42, 143, .12), 0 8px 18px rgba(75, 42, 143, .12);
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease, color .3s ease;
}
.card-icon i { font-size: 1.65rem; line-height: 1; }

.card:hover .card-icon {
  transform: scale(1.08) rotate(-4deg);
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: var(--yellow);
  box-shadow: 0 12px 24px rgba(75, 42, 143, .35);
}

/* Orange accent (tarpaulin, t-shirt, giveaways) */
.card[data-accent="orange"] .card-icon {
  color: var(--orange);
  background: radial-gradient(circle at 32% 28%, #fff, #fdeadb 75%);
  box-shadow: inset 0 0 0 1px rgba(247, 147, 30, .18), 0 8px 18px rgba(247, 147, 30, .14);
}
.card[data-accent="orange"]:hover .card-icon {
  background: linear-gradient(135deg, var(--orange), #d97314);
  color: #fff;
  box-shadow: 0 12px 24px rgba(247, 147, 30, .4);
}

/* Amber accent (sticker, neon) */
.card[data-accent="amber"] .card-icon {
  color: #a87600;
  background: radial-gradient(circle at 32% 28%, #fff, #fff3cf 75%);
  box-shadow: inset 0 0 0 1px rgba(255, 196, 0, .3), 0 8px 18px rgba(255, 196, 0, .18);
}
.card[data-accent="amber"]:hover .card-icon {
  background: linear-gradient(135deg, var(--yellow), var(--orange));
  color: var(--purple-dark);
  box-shadow: 0 12px 24px rgba(255, 196, 0, .45);
}

.card h3 { color: var(--purple); margin-bottom: 8px; font-size: 1.2rem; }
.card p { color: var(--muted); font-size: .96rem; }

/* Small tag used on featured cards */
.card-tag {
  position: absolute; top: 14px; right: 14px; background: var(--yellow); color: var(--purple);
  padding: 6px 12px; border-radius: 999px; font-weight: 800; font-size: .78rem;
  display: inline-flex; align-items: center; gap: 6px; box-shadow: 0 6px 14px rgba(255, 196, 0, .4);
}
.card-tag i { font-size: .72rem; }

/* Featured card (Exhibit Booth) gets a permanently elevated, bordered look */
.card.featured {
  border-color: transparent;
  background: linear-gradient(180deg, #fff, var(--purple-soft));
  box-shadow: var(--shadow);
}
.card.featured::before { transform: scaleX(1); }
.card.featured .card-icon {
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  color: var(--yellow);
  box-shadow: 0 10px 22px rgba(75, 42, 143, .3);
}
.card.featured:hover .card-icon { transform: scale(1.08) rotate(-4deg); }

/* Why us */
.why-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 50px; align-items: center; }
.why-visual { position: relative; }
.print-stack { line-height: 0; }
.print-stack svg { width: 100%; height: auto; display: block; overflow: visible; filter: drop-shadow(var(--shadow)); }
.stack-card { transition: transform .4s ease; transform-box: fill-box; transform-origin: center; }
.why-visual:hover .stack-card:nth-child(3) { transform: translate(74px,54px) rotate(-12deg); }
.why-visual:hover .stack-card:nth-child(4) { transform: translate(168px,118px) rotate(9deg); }
.why-badge {
  position: absolute; right: -14px; bottom: -20px; display: flex; align-items: center; gap: 12px;
  background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 14px 18px; box-shadow: var(--shadow);
}
.why-badge strong { font-size: 1.7rem; font-weight: 800; color: var(--orange); line-height: 1; }
.why-badge span { font-size: .72rem; font-weight: 700; color: var(--purple); text-transform: uppercase; letter-spacing: .4px; max-width: 92px; line-height: 1.25; }

.why-lead { color: var(--muted); margin-top: 14px; max-width: 46ch; }
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 26px 0 30px; }
.feature-card {
  background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 18px 16px;
  box-shadow: var(--shadow-sm); transition: transform .25s ease, box-shadow .25s ease;
}
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
.feature-icon {
  width: 42px; height: 42px; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 1.15rem; margin-bottom: 10px; color: #fff;
}
.feature-icon.purple { background: linear-gradient(135deg, var(--purple), var(--purple-dark)); }
.feature-icon.orange { background: linear-gradient(135deg, var(--orange), #d97314); }
.feature-icon.yellow { background: linear-gradient(135deg, var(--yellow), var(--orange)); color: var(--purple-dark); }
.feature-card h4 { font-size: .98rem; color: var(--ink); margin-bottom: 4px; }
.feature-card p { font-size: .87rem; color: var(--muted); }

.why-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
.why-trust { font-size: .85rem; color: var(--orange); font-weight: 600; letter-spacing: .5px; }
.why-trust strong { color: var(--purple); font-weight: 800; }

@media (max-width: 480px) {
  .why-badge { right: 10px; bottom: -16px; padding: 10px 14px; }
  .feature-grid { grid-template-columns: 1fr; }
}

/* Steps */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 22px; text-align: center; position: relative; }
.step-num {
  display: grid; place-items: center; width: 52px; height: 52px; margin: 0 auto 14px;
  border-radius: 50%; background: var(--purple); color: var(--yellow); font-weight: 800; font-size: 1.3rem;
}
.step h3 { color: var(--purple); margin-bottom: 6px; font-size: 1.1rem; }
.step p { color: var(--muted); font-size: .92rem; }

/* Portfolio */
.filters { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-bottom: 30px; }
.filter { border: 2px solid var(--border); background: #fff; color: var(--purple); font-weight: 600; padding: 9px 20px; border-radius: 999px; cursor: pointer; transition: .2s; }
.filter:hover { border-color: var(--purple); }
.filter.active { background: var(--purple); color: #fff; border-color: var(--purple); }
.gallery { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.gallery-item { position: relative; overflow: hidden; border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item figcaption { position: absolute; inset: auto 0 0 0; background: linear-gradient(transparent, rgba(55, 31, 107, .92)); color: #fff; font-weight: 600; padding: 28px 16px 14px; }
.gallery-item.hide { display: none; }

/* Stats band */
.stats-band { background: linear-gradient(135deg, var(--purple), var(--purple-dark)); color: #fff; padding: 56px 0; }
.stats-inner { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; text-align: center; }
.stat strong { display: block; font-size: 2.6rem; font-weight: 800; color: var(--yellow); }
.stat span { opacity: .9; font-weight: 500; }

/* Testimonials */
.quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.quote { background: #fff; border: 1px solid var(--border); border-left: 5px solid var(--yellow); border-radius: var(--radius); padding: 28px; box-shadow: var(--shadow-sm); }
.quote p { font-style: italic; color: var(--ink); margin-bottom: 14px; }
.quote footer { font-weight: 700; color: var(--purple); }

/* CTA + quote form */
.cta { background: radial-gradient(900px 400px at -10% 0%, rgba(247, 147, 30, .18), transparent 55%), linear-gradient(135deg, var(--purple), var(--purple-dark)); color: #fff; padding: 80px 0; }
.cta-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
.cta h2 { color: #fff; }
.cta h2 .hl { color: var(--yellow); }
.cta h2 .hl::after { display: none; }
.cta-text p { opacity: .92; margin: 14px 0 18px; }
.cta-points { list-style: none; display: grid; gap: 10px; font-weight: 600; }
.quote-form { background: #fff; border-radius: 20px; padding: 30px; box-shadow: var(--shadow); display: grid; gap: 14px; }
.quote-form h3 { color: var(--purple); font-size: 1.4rem; }
.quote-form .row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.quote-form input, .quote-form select, .quote-form textarea {
  width: 100%; border: 1px solid var(--border); border-radius: 10px; padding: 13px 14px; font: inherit; color: var(--ink); background: #fff; resize: vertical;
}
.quote-form input:focus, .quote-form select:focus, .quote-form textarea:focus { outline: 2px solid var(--orange); border-color: transparent; }
.form-note { color: #1a8f3c; font-weight: 600; text-align: center; }
.form-note.error { color: #c0392b; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 40px; }
.contact-info p { margin-bottom: 14px; color: var(--muted); }
.contact-info strong { display: block; color: var(--purple); }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 16px; }
.contact-map iframe { width: 100%; height: 340px; border: 0; border-radius: var(--radius); box-shadow: var(--shadow-sm); }

/* Footer */
.footer { background: var(--purple-dark); color: #d9cdf5; padding-top: 56px; }
.footer-logo { display: inline-block; background: #fff; padding: 10px 14px; border-radius: 12px; }
.footer-logo img { height: 64px; width: auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 30px; padding-bottom: 36px; }
.footer h4 { color: #fff; margin-bottom: 14px; }
.footer-grid a { display: block; color: #c5b6ea; margin-bottom: 8px; transition: color .2s; }
.footer-grid a:hover { color: var(--yellow); }
.footer-about { margin-top: 14px; max-width: 34ch; font-size: .95rem; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .12); padding: 18px 0; font-size: .9rem; text-align: center; }

/* Floating quote button */
.fab {
  position: fixed; right: 18px; bottom: 18px; z-index: 70; background: var(--orange); color: #fff;
  font-weight: 700; padding: 14px 20px; border-radius: 999px; box-shadow: 0 12px 26px rgba(247, 147, 30, .5);
  transition: transform .15s;
}
.fab:hover { transform: translateY(-3px); }

/* Reveal animation */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 960px) {
  .cards { grid-template-columns: repeat(2, 1fr); }
  .gallery { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .stats-inner { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .topbar-hours { display: none; }
  .hero-inner, .why-grid, .cta-inner, .contact-grid { grid-template-columns: 1fr; }
  .hero-image { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav-toggle { display: flex; }
  .nav-links {
    position: absolute; top: 88px; left: 0; right: 0; flex-direction: column; align-items: flex-start;
    background: #fff; border-bottom: 1px solid var(--border); padding: 18px 24px; gap: 16px;
    transform: translateY(-160%); opacity: 0; pointer-events: none; transition: transform .3s, opacity .3s;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
}
@media (max-width: 480px) {
  .cards, .gallery, .steps { grid-template-columns: 1fr; }
  .quote-form .row { grid-template-columns: 1fr; }
}

/* Clickable service cards */
.card[data-service] { cursor: pointer; }
.card[data-service]::after {
  content: "View samples →"; display: inline-flex; align-items: center; margin-top: 16px;
  color: var(--orange); font-weight: 700; font-size: .9rem; gap: 4px;
  transition: gap .2s ease;
}
.card[data-service]:hover::after { gap: 8px; }

/* Service gallery modal */
.modal { position: fixed; inset: 0; z-index: 200; display: none; }
.modal.open { display: block; }
.modal-overlay { position: absolute; inset: 0; background: rgba(20, 8, 50, .7); }
.modal-box {
  position: relative; background: #fff; width: min(1040px, 94%); max-height: 88vh;
  overflow-y: auto; margin: 6vh auto; border-radius: var(--radius); padding: 30px;
  box-shadow: var(--shadow);
}
.modal-box h3 { color: var(--purple); font-size: 1.7rem; }
.modal-sub { color: var(--muted); margin: 6px 0 20px; }
.modal-close {
  position: absolute; top: 12px; right: 18px; background: none; border: 0;
  font-size: 2rem; line-height: 1; color: var(--purple); cursor: pointer;
}
.modal-gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.modal-gallery img {
  width: 100%; height: 300px; object-fit: cover; border-radius: 12px;
  cursor: zoom-in; transition: transform .2s, box-shadow .2s;
}
.modal-gallery img:hover { transform: scale(1.02); box-shadow: var(--shadow); }
@media (max-width: 640px) {
  .modal-gallery { grid-template-columns: 1fr; }
  .modal-gallery img { height: 240px; }
}

/* Exhibit Booth: each project shown as a Mockup → Final Output pair */
.modal-gallery.booth-mode {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}
.booth-project {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--purple-soft);
}
.booth-project-title {
  font-weight: 800; color: var(--purple); font-size: 1.05rem; margin-bottom: 14px;
}
.booth-pair {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
}
.booth-figure { position: relative; }
.booth-figure img {
  width: 100%; height: 260px; object-fit: cover; border-radius: 12px;
  cursor: zoom-in; box-shadow: var(--shadow-sm); transition: transform .2s, box-shadow .2s;
  display: block;
}
.booth-figure img:hover { transform: scale(1.015); box-shadow: var(--shadow); }
.booth-figure figcaption {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 10px; font-weight: 700; font-size: .82rem;
  color: var(--purple); background: #fff; padding: 5px 12px; border-radius: 999px;
  box-shadow: var(--shadow-sm);
}
.booth-figure:first-child figcaption i { color: var(--orange); }
.booth-figure:last-child figcaption i { color: #1a8f3c; }
.booth-arrow {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  background: var(--purple); color: var(--yellow); font-size: 1.1rem; box-shadow: var(--shadow-sm);
}
@media (max-width: 640px) {
  .booth-pair { grid-template-columns: 1fr; }
  .booth-arrow { transform: rotate(90deg); margin: -6px auto; }
  .booth-figure img { height: 220px; }
}

/* Lightbox (full-size image preview) */
.lightbox {
  position: fixed; inset: 0; z-index: 300; display: none;
  align-items: center; justify-content: center;
  background: rgba(10, 4, 28, .92); padding: 24px;
}
.lightbox.open { display: flex; animation: lightboxIn .18s ease-out; }

@keyframes lightboxIn {
  from { opacity: 0; transform: translateY(6px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.lightbox img {
  max-width: 95vw; max-height: 92vh; width: auto; height: auto;
  border-radius: 8px; box-shadow: 0 20px 60px rgba(0, 0, 0, .5); cursor: zoom-out;
}
.lightbox-close {
  position: absolute; top: 16px; right: 26px; background: none; border: 0;
  color: #fff; font-size: 2.6rem; line-height: 1; cursor: pointer;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 999px;
  border: 0;
  background: rgba(255,255,255,.12);
  color: #fff;
  font-size: 2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: opacity .18s ease, visibility .18s ease, background .2s, transform .2s;
}

.lightbox-nav:hover {
  background: rgba(255,255,255,.22);
}
.lightbox-prev { left: 18px; }
.lightbox-next { right: 18px; }

.lightbox.open .lightbox-nav {
  opacity: 1;
  visibility: visible;
}

@media (hover: none) {
  .lightbox-nav { opacity: 1; visibility: visible; }
}

@media (max-width: 520px) {
  .lightbox-nav {
    width: 42px;
    height: 42px;
    font-size: 1.8rem;
  }
  .lightbox-prev { left: 10px; }
  .lightbox-next { right: 10px; }
}