/* ============================================================
   ATbio — Product Detail (atbio-product-detail.html, ONELUX)
   Layout: GLOBAL TOKENS → COMMON HEADER → COMMON LINK FX
           → PAGE-LOCAL → COMMON FOOTER → RESPONSIVE
   Note: image paths are NOT referenced here — see inline
   style="background-image:url(...)" in HTML for .foot-bg.
   ============================================================ */

/* ===========================================================================
   1. GLOBAL — Fonts & Base
   =========================================================================== */

html,
body {
  font-family: 'Noto Sans SC', 'Source Han Sans SC', sans-serif;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
  color: #1a1a1a;
  background: #fff;
}

html:lang(ar),
body:lang(ar) {
  font-family: 'Noto Sans Arabic', 'Traditional Arabic', sans-serif;
}

.page {
  max-width: 1920px;
  width: 100%;
  margin: 0 auto;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color .25s ease, background-color .3s ease, transform .3s ease;
}

a:hover {
  text-decoration: none;
}

/* ===========================================================================
   2. COMMON — Top navigation (header)
   =========================================================================== */
.topbar {
  position: relative;
  z-index: 60;
  background: #fff;
  border-bottom: 1px solid #eef0f3;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 25px clamp(20px, 5vw, 96px);
}

.nav .logo {
  display: inline-flex;
  align-items: center;
  line-height: 0;
}

.nav .logo img {
  height: 40px;
  width: auto;
  display: block;
  object-fit: contain;
}

.desk-nav {
  display: flex;
  gap: 36px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
}

.desk-nav a {
  cursor: pointer;
  position: relative;
  display: inline-block;
  transition: color .2s;
}

.desk-nav a:hover,
.desk-nav a.active {
  color: #9EE3DE;
}

.nav-right {
  display: flex;
  gap: 14px;
  align-items: center;
  font-size: 14px;
  position: relative;
}

.lang-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: 999px;
  border: 1px solid #d6dbe1;
  background: #fff;
  font-size: 12px;
  cursor: pointer;
  position: relative;
}

.lang-pill:hover {
  border-color: #9EE3DE;
  color: #9EE3DE;
}

.lang-pill .lang-menu {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: #fff;
  border: 1px solid #eef0f3;
  border-radius: 14px;
  box-shadow: 0 12px 30px -10px rgba(0, 0, 0, .15);
  padding: 6px;
  min-width: 120px;
  z-index: 80;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.96);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  pointer-events: none;
}

.lang-pill.open .lang-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.lang-pill .lang-menu a {
  display: block;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12px;
}

.lang-pill .lang-menu a:hover {
  background: #f1f6fb;
  color: #9EE3DE;
}

.search-wrap {
  display: inline-flex;
  align-items: center;
}

.search-input {
  width: 0;
  opacity: 0;
  padding: 0;
  border: 1px solid transparent;
  border-radius: 999px;
  background: #f1f6fb;
  font-size: 12px;
  outline: none;
  margin-right: 0;
  transition: 
    width .55s cubic-bezier(.65, .05, .36, 1), 
    opacity .35s ease, 
    padding .45s ease, 
    margin .45s ease, 
    border-color .35s ease, 
    box-shadow .45s ease;
}

.search-wrap:hover .search-input,
.search-wrap:focus-within .search-input {
  width: 240px;
  opacity: 1;
  padding: 8px 16px;
  margin-right: 8px;
  border-color: #cfe1f3;
  box-shadow: 0 6px 22px -10px rgba(126, 192, 238, .6);
}

.search-pill {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid #d6dbe1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: transform .35s ease, color .2s, border-color .2s, background .3s;
}

.search-pill:hover {
  color: #9EE3DE;
  border-color: #9EE3DE;
}

.search-wrap:hover .search-pill {
  transform: rotate(90deg);
  background: #9EE3DE;
  color: #fff;
  border-color: #9EE3DE;
}

.mnav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border: 1px solid #d6dbe1;
  border-radius: 8px;
  cursor: pointer;
}

#mnav-chk {
  display: none;
}

.mnav {
  display: none;
  position: fixed;
  inset: 0;
  background: #000000;
  z-index: 200;
  flex-direction: column;
  align-items: flex-start;
  padding: 80px 32px;
  gap: 20px;
  color: #fff;
}

.mnav a {
  color: #fff;
  font-size: 18px;
  font-weight: 500;
  text-align: left;
  align-self: flex-start;
}

.mnav .mnav-close {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 28px;
  color: #fff;
  cursor: pointer;
}

.mnav input {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .2);
  color: #fff;
  border-radius: 999px;
  padding: 12px 18px;
  width: 100%;
  font-size: 14px;
}

.mnav .msearch-wrap {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  width: 100%;
  margin-top: 8px;
}

.mnav .msearch-input {
  flex: 1 1 auto;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .2);
  color: #fff;
  border-radius: 999px;
  padding: 12px 18px;
  font-size: 14px;
  outline: none;
}

.mnav .msearch-pill {
  flex: 0 0 auto;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, .3);
  background: transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  cursor: pointer;
}

.mnav .lang-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-self: flex-start;
}

.mnav .lang-row button {
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .2);
  color: #fff;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
}

#mnav-chk:checked~.mnav {
  display: flex !important;
}

/* ===========================================================================
   3. COMMON — Link / Button / Card / Image Interactions (fx-*)
   =========================================================================== */

.fx-link,
.desk-nav a {
  position: relative;
  display: inline-block;
  width: fit-content;
  max-width: 100%;
  line-height: 1.15;
  vertical-align: bottom;
  color: #000000;
}

.fx-link:hover {
  color: #9EE3DE;
}

.fx-btn {
  transition: 
    background-color .3s ease, 
    color .3s ease, 
    box-shadow .3s ease, 
    transform .3s ease, 
    letter-spacing .25s ease;
}

.fx-btn::after {
  display: none !important;
}

.fx-card {
  display: block;
  text-decoration: none;
  height: 100%;
}

.fx-card .pp-image {
  overflow: hidden;
}

.fx-card:hover .pp-image img {
  transform: scale(1.08);
  filter: brightness(1.04);
}

.fx-card h3 {
  transition: color .3s ease, transform .3s ease, letter-spacing .3s ease;
  transform-origin: left center;
  display: inline-block;
}

.fx-card:hover h3 {
  color: #9EE3DE;
  transform: scale(1.04);
  letter-spacing: .01em;
}

.fx-card p {
  transition: color .3s ease;
}

.fx-img {
  display: block;
  cursor: pointer;
  overflow: hidden;
}

.fx-img img {
  transition: transform .6s cubic-bezier(.2, .7, .3, 1), filter .4s ease;
  will-change: transform;
}

.fx-img:hover img {
  transform: scale(1.04);
  filter: brightness(1.03);
}

/* ===========================================================================
   4. PAGE-LOCAL — Breadcrumb
   =========================================================================== */
.crumb{padding:22px clamp(20px,5vw,96px) 8px;display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:13px;}
.crumb a{display:inline-flex;align-items:center;gap:8px;}
.crumb a:hover{color:#9EE3DE;}
.crumb i.fa-chevron-down{font-size:9px;}
.crumb .sep{font-size:11px;}

/* ===========================================================================
   5. PAGE-LOCAL — PDP gallery (thumbs + hero image)
   =========================================================================== */
.pdp{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;padding:24px clamp(20px,5vw,96px) 40px;align-items:flex-start;}
.gallery{display:grid;grid-template-columns:64px 1fr;gap:16px;}
.thumbs{display:flex;flex-direction:column;gap:12px;}
.thumb{position:relative;width:64px;height:64px;border:1px solid #d6dbe1;border-radius:6px;background:#f4f4f4;display:flex;align-items:center;justify-content:center;overflow:hidden;cursor:pointer;transition:border-color .25s,transform .25s;}
.thumb img{width:100%;height:100%;object-fit:cover;}
.thumb.is-active,.thumb:hover{border-color:#0d2540;transform:translateY(-1px);}
.thumb.is-video::after{content:"\f04b";font-family:"Font Awesome 6 Free";font-weight:900;position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#fff;font-size:14px;background:rgba(13,37,64,.45);text-shadow:0 1px 4px rgba(0,0,0,.4);}
.hero-img{aspect-ratio:1/1;border-radius:6px;display:flex;align-items:center;justify-content:center;overflow:hidden;}
.hero-img img{width:100%;height:100%;object-fit:contain;display:block;}

/* ===========================================================================
   6. PAGE-LOCAL — YouTube modal
   =========================================================================== */
.yt-modal{position:fixed;inset:0;background:rgba(0,0,0,.78);display:none;align-items:center;justify-content:center;z-index:9999;padding:24px;}
.yt-modal.open{display:flex;}
.yt-modal .yt-box{position:relative;width:min(960px,100%);aspect-ratio:16/9;background:#000;border-radius:8px;overflow:hidden;box-shadow:0 30px 80px -20px rgba(0,0,0,.6);}
.yt-modal iframe{width:100%;height:100%;border:0;}
.yt-modal .yt-close{position:absolute;top:-42px;right:0;background:transparent;color:#fff;border:0;font-size:22px;cursor:pointer;}

/* ===========================================================================
   7. PAGE-LOCAL — Product info / Advantages
   =========================================================================== */
.pinfo h1{font-size:clamp(26px,2.4vw,34px);font-weight:600;margin:0 0 18px;letter-spacing:.01em;line-height:1.2;}
.contact-pill{display:inline-flex;align-items:center;justify-content:center;padding:12px 34px;border:1.5px solid #000;border-radius:999px;font-size:13px;font-weight:500;background:#fff;cursor:pointer;letter-spacing:.04em;transition:background .3s,color .3s,box-shadow .3s,transform .3s;}
.contact-pill:hover{background:#000;color:#fff;transform:translateY(-2px);box-shadow:0 14px 28px -14px rgba(0,0,0,.35);}

.adv-title{margin-top:36px;font-size:13px;font-weight:600;letter-spacing:.18em;}
.adv-list{margin-top:14px;display:flex;flex-direction:column;gap:18px;}
.adv-item{display:grid;grid-template-columns:54px 1fr;gap:18px;align-items:flex-start;}
.adv-icon{width:46px;height:46px;border-radius:50%;border:1px solid #d6dbe1;display:inline-flex;align-items:center;justify-content:center;font-size:18px;background:#fff;transition:border-color .3s,color .3s,transform .3s,box-shadow .3s;}
.adv-item:hover .adv-icon{border-color:#9EE3DE;color:#9EE3DE;transform:translateY(-2px);box-shadow:0 10px 22px -12px rgba(158,227,222,.55);}
.adv-text{min-width:0;display:block;}
.adv-text h4{margin:0 0 6px;font-size:16px;font-weight:600;line-height:1.3;}
.adv-text p{margin:0;font-size:14px;line-height:1.65;}

/* ===========================================================================
   8. PAGE-LOCAL — Collapsible sections (Description / Instructions / Brochure)
   =========================================================================== */
.section{padding:8px clamp(20px,5vw,96px);}
.section + .section{border-top:1px solid #eef0f3;}
details.acc{padding:22px 0;}
details.acc > summary{list-style:none;cursor:pointer;display:grid;grid-template-columns:1fr auto;align-items:start;gap:24px;}
details.acc > summary::-webkit-details-marker{display:none;}
.acc-eyebrow{font-size:11px;font-weight:600;letter-spacing:.18em;}
.acc-title{margin-top:6px;font-size:clamp(20px,1.8vw,26px);font-weight:600;letter-spacing:.01em;}
.acc-caret{align-self:center;width:34px;height:34px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:13px;transition:transform .35s ease,color .25s;}
details[open] .acc-caret{transform:rotate(180deg);color:#9EE3DE;}
.acc-body{padding-top:16px;display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:48px;}
.acc-body p{font-size:14px;line-height:1.9;margin:0 0 12px;}
.acc-sub{font-size:11px;font-weight:600;letter-spacing:.18em;margin:18px 0 10px;}
.spec-list{list-style:none;margin:0;padding:0;}
.spec-list li{font-size:14px;line-height:1.9;display:flex;gap:10px;align-items:flex-start;}
.spec-list li::before{content:"■";font-size:9px;line-height:1.9;}
.spec-list li a{transition:color .25s;}
.spec-list li a:hover{color:#9EE3DE;}

/* ===========================================================================
   9. PAGE-LOCAL — Download card
   =========================================================================== */
.dl-card{margin-top:16px;border:1.5px solid #000;border-radius:6px;padding:22px 24px;display:flex;flex-direction:column;gap:18px;max-width:420px;background:#fff;transition:box-shadow .3s,transform .3s;}
.dl-card:hover{box-shadow:0 22px 50px -28px rgba(0,0,0,.2);transform:translateY(-2px);}
.dl-card h5{margin:0;font-size:13px;font-weight:600;}
.dl-card span{font-size:11px;}
.dl-btn{width:48px;height:32px;border-radius:999px;background:#000;color:#fff;display:inline-flex;align-items:center;justify-content:center;font-size:13px;align-self:flex-start;transition:background .3s,transform .3s,box-shadow .3s;}
.dl-btn:hover{background:#9EE3DE;transform:translateY(-2px);box-shadow:0 12px 24px -12px rgba(158,227,222,.55);}

/* ===========================================================================
   10. PAGE-LOCAL — FAQ
   =========================================================================== */
.faq-head{padding:60px clamp(20px,5vw,96px) 8px;}
.faq-eyebrow{font-size:11px;font-weight:600;letter-spacing:.18em;}
.faq-title{margin-top:8px;font-size:clamp(22px,2vw,30px);font-weight:600;letter-spacing:.01em;}
.faq{padding:8px clamp(20px,5vw,96px) 60px;}
details.faq-item{border-top:1px solid #eef0f3;padding:18px 0;}
details.faq-item:last-of-type{border-bottom:1px solid #eef0f3;}
details.faq-item > summary{list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:24px;font-size:14px;font-weight:500;transition:color .25s;}
details.faq-item > summary::-webkit-details-marker{display:none;}
details.faq-item:hover > summary{color:#9EE3DE;}
details.faq-item[open] > summary{color:#9EE3DE;}
details.faq-item .faq-caret{width:28px;height:28px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:12px;transition:transform .35s ease;}
details.faq-item[open] .faq-caret{transform:rotate(180deg);}
details.faq-item .faq-ans{margin-top:14px;font-size:14px;line-height:1.85;max-width:920px;}

/* ===========================================================================
   11. COMMON — Footer
   (.foot-bg background image is set inline on the element in HTML)
   =========================================================================== */

footer {
  background: #fff;
  padding: 50px clamp(20px, 5vw, 96px) 0;
}

.foot-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 30px;
  border-bottom: 1px solid #eef0f3;
  padding-bottom: 30px;
}

.foot-top h4 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.foot-top p {
  font-size: 18px;
  line-height: 1.65;
}

.socials {
  display: flex;
  gap: 10px;
  align-items: center;
  align-self: flex-end;
}

.socials a {
  width: 32px;
  height: 32px;
  border: 1px solid #000000;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  background: #000000;
  color: #fff;
  transition:
    background 0.3s ease,
    color 0.3s ease,
    border-color 0.3s ease,
    transform 0.3s ease;
}

.socials a:hover {
  background: #fff;
  color: #000000;
  border-color: #000000;
  transform: translateY(-2px);
}

.socials .wechat {
  position: relative;
}

.socials .wechat .qrcode {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  margin-bottom: 10px;
  width: 120px;
  height: 120px;
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  display: none;
  padding: 8px;
}

.socials .wechat .qrcode img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: 4px;
}

.socials .wechat:hover .qrcode,
.socials .wechat:focus-within .qrcode {
  display: block;
}

.foot-bg {
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  height: auto;
  margin: 0 calc(-1 * clamp(20px, 5vw, 96px)) 0;
  padding: 0 clamp(20px, 5vw, 96px);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.foot-cols {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 30px;
  padding: 60px 0 40px;
}

.foot-cols h5 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

.foot-cols a,
.foot-cols p {
  font-size: 18px;
  line-height: 1.5;
  display: block;
}

.foot-cols a {
  transition:
    color 0.25s ease,
    transform 0.25s ease;
  color: #000000;
}

.foot-cols a:hover {
  color: #9EE3DE;
  transform: translateX(3px);
}

.foot-bottom {
  position: relative;
  padding: 60px 0;
  text-align: center;
}

.foot-bottom .big-logo {
  display: inline-block;
  width: 20%;
  max-width: 280px;
  min-width: 120px;
  line-height: 0;
}

.foot-bottom .big-logo img {
  width: 100%;
  height: auto;
  display: block;
}

.foot-bottom small {
  display: block;
  font-size: 12px;
  margin-top: 4px;
  letter-spacing: 0.02em;
}

/* ===========================================================================
   12. RESPONSIVE
   =========================================================================== */

@media (max-width: 1024px) {
  .desk-nav,
  .nav-right .pc-only {
    display: none;
  }
  .mnav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 900px) {
  .pdp {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .acc-body {
    grid-template-columns: 1fr;
    gap: 18px;
  }
  .foot-cols {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 560px) {
  .gallery {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .gallery .hero-img {
    order: 1;
  }
  .gallery .thumbs {
    order: 2;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  .thumb {
    width: 60px;
    height: 60px;
  }
  .pinfo h1 {
    font-size: 22px;
  }
  .crumb {
    font-size: 12px;
  }
}

/* OUR CULTURE banner (background image set inline on .culture) */
.culture {
  margin: 60px 0;
  position: relative;
  overflow: hidden;
  height: clamp(280px, 22vw, 420px);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  display: flex;
  align-items: center;
  justify-content: center;
}

.culture .panel {
  background: rgba(230, 232, 235, .18);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: #fff;
  padding: 0 clamp(40px, 6vw, 90px);
  width: 80%;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.culture .panel h3 {
  font-size: 50px;
  font-weight: 700;
  letter-spacing: -.05em;
  color: #fff;
  margin: 0;
}

.culture .panel p {
  font-size: 30px;
  line-height: 1.7;
  margin-top: 0;
  color: #fff;
  max-width: 60ch;
}

@media (max-width: 760px) {
  .culture .panel {
    width: 92%;
  }
  .culture .panel h3 {
    font-size: clamp(28px, 6vw, 36px);
  }
  .culture .panel p {
    font-size: clamp(14px, 3vw, 18px);
    line-height: 1.5;
  }
}