:root{
  --teal-deep:#0B3D3B;
  --teal-ink:#0F2C2A;
  --seafoam:#A9CBB7;
  --parchment:#F6F2EA;
  --amber:#C98C3F;
  --ink:#17221F;
  --line: rgba(23,34,29,0.12);
  --white:#FFFDF9;
}

body.wikioptics-landing{
  margin:0;
  background:var(--parchment);
  color:var(--ink);
  font-family:'Inter', sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
body.wikioptics-landing *{box-sizing:border-box;}
body.wikioptics-landing{scroll-behavior:smooth;}

body.wikioptics-landing .wrap{
  max-width:1180px;
  margin:0 auto;
  padding:0 32px;
}

body.wikioptics-landing h1,
body.wikioptics-landing h2,
body.wikioptics-landing h3{
  font-family:'Fraunces', serif;
  margin:0;
  color:var(--teal-ink);
  text-wrap:balance;
}

body.wikioptics-landing .eyebrow{
  font-family:'IBM Plex Mono', monospace;
  font-size:12px;
  letter-spacing:0.16em;
  text-transform:uppercase;
  color:var(--teal-deep);
  opacity:0.7;
}

body.wikioptics-landing a:focus-visible,
body.wikioptics-landing .nav-toggle-input:focus-visible ~ .nav-right .nav-toggle-btn{
  outline:2px solid var(--amber);
  outline-offset:3px;
  border-radius:4px;
}

/* NAV */
body.wikioptics-landing nav.site-nav{
  position:sticky; top:env(safe-area-inset-top, 0px); z-index:50;
  background:rgba(246,242,234,0.92);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--line);
}
body.wikioptics-landing nav.site-nav .wrap{
  position:relative;
  display:flex; align-items:center; justify-content:space-between;
  height:76px;
}
body.wikioptics-landing .logo{
  font-family:'Fraunces', serif;
  font-weight:600;
  font-size:22px;
  color:var(--teal-ink);
  letter-spacing:-0.01em;
  display:flex;
  align-items:baseline;
  gap:4px;
}
body.wikioptics-landing .logo span{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  font-weight:500;
  color:var(--amber);
  letter-spacing:0.08em;
  text-transform:uppercase;
}
body.wikioptics-landing .nav-links{
  display:flex; gap:36px;
  list-style:none; margin:0; padding:0;
}
body.wikioptics-landing .nav-links a{
  color:var(--ink);
  text-decoration:none;
  font-size:14.5px;
  font-weight:500;
  opacity:0.75;
  transition:opacity 0.2s ease;
}
body.wikioptics-landing .nav-links a:hover{opacity:1;}
body.wikioptics-landing .nav-right{
  display:flex;
  align-items:center;
  gap:16px;
}
body.wikioptics-landing .nav-cta{
  background:var(--teal-deep);
  color:var(--white);
  padding:10px 20px;
  border-radius:100px;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:transform 0.2s ease, background 0.2s ease;
  display:inline-block;
}
body.wikioptics-landing .nav-cta:hover{background:var(--teal-ink); transform:translateY(-1px);}

/* Mobile nav toggle (checkbox-driven, no script needed) */
body.wikioptics-landing .nav-toggle-input{
  position:absolute;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden;
  clip:rect(0,0,0,0);
  white-space:nowrap;
  border:0;
}
body.wikioptics-landing .nav-toggle-btn{
  display:none;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  width:38px; height:38px;
  padding:8px;
  cursor:pointer;
  flex-shrink:0;
}
body.wikioptics-landing .nav-toggle-btn span{
  display:block;
  width:100%; height:2px;
  background:var(--teal-ink);
  border-radius:2px;
  transition:transform 0.25s ease, opacity 0.2s ease;
}
body.wikioptics-landing .nav-toggle-input:checked ~ .nav-right .nav-toggle-btn span:nth-child(1){transform:translateY(7px) rotate(45deg);}
body.wikioptics-landing .nav-toggle-input:checked ~ .nav-right .nav-toggle-btn span:nth-child(2){opacity:0;}
body.wikioptics-landing .nav-toggle-input:checked ~ .nav-right .nav-toggle-btn span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

/* HERO — Snellen chart signature */
body.wikioptics-landing .hero{
  position:relative;
  padding:88px 0 64px;
  overflow:hidden;
}
body.wikioptics-landing .hero .wrap{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
}
body.wikioptics-landing .hero-copy{
  max-width:640px;
}
body.wikioptics-landing .hero-copy h1{
  font-size:clamp(34px, 5.2vw, 62px);
  line-height:1.05;
  font-weight:600;
  letter-spacing:-0.015em;
  margin:14px 0 22px;
}
body.wikioptics-landing .hero-copy h1 em{
  font-style:italic;
  color:var(--amber);
  font-weight:500;
}
body.wikioptics-landing .hero-copy p{
  font-size:17px;
  line-height:1.6;
  color:var(--ink);
  opacity:0.78;
  max-width:520px;
  margin:0 0 30px;
}
body.wikioptics-landing .hero-actions{
  display:flex; gap:14px; flex-wrap:wrap;
}
body.wikioptics-landing .btn-primary{
  background:var(--teal-deep);
  color:var(--white);
  padding:14px 26px;
  border-radius:100px;
  font-weight:600;
  font-size:15px;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:transform 0.2s ease, background 0.2s ease;
}
body.wikioptics-landing .btn-primary:hover{background:var(--teal-ink); transform:translateY(-1px);}
body.wikioptics-landing .btn-ghost{
  border:1.5px solid var(--teal-deep);
  color:var(--teal-deep);
  padding:13px 24px;
  border-radius:100px;
  font-weight:600;
  font-size:15px;
  text-decoration:none;
  transition:background 0.2s ease;
}
body.wikioptics-landing .btn-ghost:hover{background:rgba(11,61,59,0.06);}

/* Snellen chart visual */
body.wikioptics-landing .snellen{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:20px;
  padding:40px 44px 34px;
  box-shadow: 0 24px 60px -30px rgba(11,61,59,0.25);
  max-width:600px;
  width:100%;
}
body.wikioptics-landing .snellen-row{
  font-family:'IBM Plex Mono', monospace;
  font-weight:600;
  color:var(--teal-ink);
  letter-spacing:0.06em;
  text-align:center;
  line-height:1.7;
  opacity:0;
  animation: wikioptics-reveal 0.7s ease forwards;
}
body.wikioptics-landing .snellen-row:nth-child(1){font-size:46px; animation-delay:0.1s;}
body.wikioptics-landing .snellen-row:nth-child(2){font-size:34px; animation-delay:0.25s; opacity:0.88;}
body.wikioptics-landing .snellen-row:nth-child(3){font-size:25px; animation-delay:0.4s; opacity:0.72;}
body.wikioptics-landing .snellen-row:nth-child(4){font-size:18px; animation-delay:0.55s; opacity:0.56;}
body.wikioptics-landing .snellen-row:nth-child(5){font-size:13px; animation-delay:0.7s; opacity:0.4; letter-spacing:0.1em;}
@keyframes wikioptics-reveal{
  from{opacity:0; transform:translateY(6px);}
  to{transform:translateY(0);}
}
body.wikioptics-landing .snellen-caption{
  text-align:center;
  margin-top:20px;
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  letter-spacing:0.1em;
  text-transform:uppercase;
  color:var(--teal-deep);
  opacity:0.55;
}

/* TRUST STRIP */
body.wikioptics-landing .trust-strip{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
  background:var(--white);
}
body.wikioptics-landing .trust-strip .wrap{
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:28px;
  padding:26px 32px;
}
body.wikioptics-landing .trust-item{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:14px;
  font-weight:500;
  color:var(--teal-ink);
  opacity:0.8;
}
body.wikioptics-landing .trust-item .dot{
  width:6px; height:6px; border-radius:50%;
  background:var(--amber);
  flex-shrink:0;
}

/* SECTION HEADERS */
body.wikioptics-landing .section{
  padding:88px 0;
}
body.wikioptics-landing .section-head{
  max-width:600px;
  margin-bottom:52px;
}
body.wikioptics-landing .section-head h2{
  font-size:clamp(28px,3.4vw,38px);
  font-weight:600;
  margin-top:12px;
  letter-spacing:-0.01em;
}
body.wikioptics-landing .section-head p{
  font-size:16px;
  line-height:1.6;
  opacity:0.72;
  margin-top:14px;
}

/* TOPICS GRID */
body.wikioptics-landing .topics-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:22px;
}
body.wikioptics-landing .topic-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:16px;
  padding:28px;
  transition:transform 0.25s ease, box-shadow 0.25s ease;
}
body.wikioptics-landing .topic-card:hover{
  transform:translateY(-4px);
  box-shadow:0 20px 40px -24px rgba(11,61,59,0.3);
}
body.wikioptics-landing .topic-icon{
  width:42px; height:42px;
  border-radius:10px;
  background:var(--seafoam);
  display:flex; align-items:center; justify-content:center;
  font-size:19px;
  margin-bottom:18px;
}
body.wikioptics-landing .topic-card h3{
  font-size:18px;
  font-weight:600;
  margin-bottom:8px;
}
body.wikioptics-landing .topic-card p{
  font-size:14px;
  line-height:1.55;
  opacity:0.68;
  margin:0 0 14px;
}
body.wikioptics-landing .topic-card a{
  font-size:13px;
  font-weight:600;
  color:var(--teal-deep);
  text-decoration:none;
}

/* CHAT PREVIEW */
body.wikioptics-landing .chat-section{
  background:var(--teal-deep);
  border-radius:28px;
  margin:0 32px;
  padding:64px 56px;
  color:var(--white);
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
body.wikioptics-landing .chat-copy .eyebrow{color:var(--seafoam); opacity:0.9;}
body.wikioptics-landing .chat-copy h2{color:var(--white); font-size:32px; margin-top:12px;}
body.wikioptics-landing .chat-copy p{
  font-size:15.5px; line-height:1.65; opacity:0.82; margin-top:16px; max-width:420px;
}
body.wikioptics-landing .chat-copy .btn-primary{background:var(--amber);}
body.wikioptics-landing .chat-copy .btn-primary:hover{background:#B87C30;}
body.wikioptics-landing .chat-copy{margin-top:18px;}

body.wikioptics-landing .chat-window{
  background:var(--white);
  border-radius:18px;
  padding:20px;
  color:var(--ink);
}
body.wikioptics-landing .chat-window .chat-head{
  display:flex; align-items:center; gap:10px;
  padding-bottom:14px; margin-bottom:14px;
  border-bottom:1px solid var(--line);
}
body.wikioptics-landing .chat-avatar{
  width:32px; height:32px; border-radius:50%;
  background:var(--seafoam);
  display:flex;align-items:center;justify-content:center;
  font-size:15px;
  flex-shrink:0;
}
body.wikioptics-landing .chat-head strong{font-size:14px;}
body.wikioptics-landing .chat-head span{
  display:block; font-size:11.5px; opacity:0.6;
}
body.wikioptics-landing .bubble{
  max-width:80%;
  padding:11px 15px;
  border-radius:14px;
  font-size:14px;
  line-height:1.5;
  margin-bottom:10px;
  overflow-wrap:break-word;
}
body.wikioptics-landing .bubble.user{
  background:var(--parchment);
  margin-left:auto;
  border-bottom-right-radius:4px;
}
body.wikioptics-landing .bubble.bot{
  background:rgba(169,203,183,0.35);
  border-bottom-left-radius:4px;
}
body.wikioptics-landing .bubble.escalate{
  background:transparent;
  border:1px dashed var(--amber);
  font-size:12.5px;
  color:var(--teal-deep);
  opacity:0.85;
}

/* DOCTORS */
body.wikioptics-landing .doctors-grid{
  display:grid;
  grid-template-columns:repeat(4, 1fr);
  gap:20px;
}
body.wikioptics-landing .doctor-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
}
body.wikioptics-landing .doctor-photo{
  height:150px;
  background:linear-gradient(145deg, var(--seafoam), var(--teal-deep));
  display:flex; align-items:center; justify-content:center;
  font-family:'Fraunces', serif;
  font-size:32px;
  color:var(--white);
  font-weight:500;
}
body.wikioptics-landing .doctor-info{padding:18px 18px 20px;}
body.wikioptics-landing .doctor-info h3{font-size:15.5px; margin-bottom:3px;}
body.wikioptics-landing .doctor-info .role{
  font-family:'IBM Plex Mono', monospace;
  font-size:11px;
  color:var(--amber);
  text-transform:uppercase;
  letter-spacing:0.05em;
  margin-bottom:10px;
  display:block;
}
body.wikioptics-landing .doctor-info p{font-size:13px; opacity:0.65; line-height:1.5; margin:0;}

/* LATEST ARTICLES */
body.wikioptics-landing .latest-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:24px;
}
body.wikioptics-landing .latest-card{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:16px;
  overflow:hidden;
  transition:transform 0.25s ease, box-shadow 0.25s ease;
}
body.wikioptics-landing .latest-card:hover{
  transform:translateY(-4px);
  box-shadow:0 20px 40px -24px rgba(11,61,59,0.3);
}
body.wikioptics-landing .latest-thumb{
  height:150px;
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  justify-content:center;
}
body.wikioptics-landing .latest-thumb::before{
  content:"";
  position:absolute; inset:0;
  background:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.22) 0, transparent 40%),
    radial-gradient(circle at 75% 70%, rgba(255,255,255,0.14) 0, transparent 45%);
}
body.wikioptics-landing .latest-thumb .thumb-icon{
  position:relative;
  font-size:34px;
  filter:drop-shadow(0 6px 10px rgba(0,0,0,0.15));
}
body.wikioptics-landing .latest-thumb.t1{background:linear-gradient(135deg,#6E8FA8,#0B3D3B);}
body.wikioptics-landing .latest-thumb.t2{background:linear-gradient(135deg,#0F2C2A,#4C7A6F);}
body.wikioptics-landing .latest-thumb.t3{background:linear-gradient(135deg,#C98C3F,#7A5424);}
body.wikioptics-landing .latest-thumb.t4{background:linear-gradient(135deg,#A9CBB7,#0B3D3B);}
body.wikioptics-landing .latest-thumb.t5{background:linear-gradient(135deg,#5B7A93,#1B3B3A);}
body.wikioptics-landing .latest-thumb.t6{background:linear-gradient(135deg,#D4A24C,#0B3D3B);}
body.wikioptics-landing .latest-badge{
  position:absolute; top:12px; left:12px;
  background:rgba(255,255,255,0.92);
  color:var(--teal-ink);
  font-family:'IBM Plex Mono', monospace;
  font-size:10.5px;
  font-weight:600;
  letter-spacing:0.06em;
  text-transform:uppercase;
  padding:4px 10px;
  border-radius:100px;
  z-index:2;
}
body.wikioptics-landing .latest-body{padding:20px 20px 22px;}
body.wikioptics-landing .latest-body h3{
  font-size:16.5px;
  font-weight:600;
  line-height:1.35;
  margin-bottom:10px;
}
body.wikioptics-landing .latest-body p{
  font-size:13.5px;
  line-height:1.55;
  opacity:0.68;
  margin:0;
}
@media (max-width: 900px){
  body.wikioptics-landing .latest-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width: 560px){
  body.wikioptics-landing .latest-grid{grid-template-columns:1fr;}
}

/* VISION A-Z */
body.wikioptics-landing .az-section{
  background:var(--white);
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
body.wikioptics-landing .az-head{
  display:flex;
  align-items:center;
  gap:20px;
  padding:56px 0 36px;
}
body.wikioptics-landing .az-head h2{
  font-size:clamp(24px,3vw,32px);
  font-weight:600;
  letter-spacing:0.01em;
  white-space:nowrap;
}
body.wikioptics-landing .az-head .rule{
  flex:1;
  height:1px;
  background:var(--line);
}
body.wikioptics-landing .az-grid{
  columns:6;
  column-gap:36px;
  padding-bottom:64px;
}
body.wikioptics-landing .az-grid a{
  display:block;
  break-inside:avoid;
  color:var(--ink);
  text-decoration:none;
  font-size:15px;
  padding:8px 0;
  border-bottom:1px solid transparent;
  transition:color 0.2s ease;
}
body.wikioptics-landing .az-grid a:hover{
  color:var(--teal-deep);
  font-weight:500;
}
body.wikioptics-landing .az-grid a.featured{
  color:var(--teal-deep);
  font-weight:600;
}
@media (max-width: 900px){
  body.wikioptics-landing .az-grid{columns:3;}
}
@media (max-width: 560px){
  body.wikioptics-landing .az-grid{columns:2;}
  body.wikioptics-landing .az-head h2{font-size:21px;}
}

/* PARTNER BANNER */
body.wikioptics-landing .partner-banner{
  background:var(--white);
  border:1px solid var(--line);
  border-radius:20px;
  margin:0 32px;
  padding:36px 44px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
body.wikioptics-landing .partner-text .eyebrow{margin-bottom:6px; display:block;}
body.wikioptics-landing .partner-text h3{font-size:20px; font-weight:600; max-width:420px;}
body.wikioptics-landing .partner-logo{
  font-family:'Fraunces', serif;
  font-weight:700;
  font-size:24px;
  color:var(--teal-ink);
  letter-spacing:-0.01em;
  border:1.5px solid var(--teal-ink);
  padding:12px 26px;
  border-radius:10px;
  white-space:nowrap;
}

/* FOOTER */
body.wikioptics-landing footer{
  margin-top:96px;
  border-top:1px solid var(--line);
  padding:44px 0 36px;
}
body.wikioptics-landing footer .wrap{
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:16px;
}
body.wikioptics-landing footer .foot-links{
  display:flex; gap:26px; list-style:none; padding:0; margin:0;
  flex-wrap:wrap;
}
body.wikioptics-landing footer .foot-links a{
  color:var(--ink); opacity:0.6; text-decoration:none; font-size:13.5px;
}
body.wikioptics-landing footer .copyright{
  font-size:13px; opacity:0.5;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 860px){
  body.wikioptics-landing .topics-grid{grid-template-columns:repeat(2,1fr);}
  body.wikioptics-landing .doctors-grid{grid-template-columns:repeat(2,1fr);}
  body.wikioptics-landing .chat-section{grid-template-columns:1fr; padding:44px 28px;}
  body.wikioptics-landing .partner-banner{flex-direction:column; align-items:flex-start;}

  body.wikioptics-landing .nav-toggle-btn{display:flex;}
  body.wikioptics-landing .nav-links{
    display:flex;
    position:absolute;
    top:76px; left:0; right:0;
    flex-direction:column;
    background:var(--white);
    border-bottom:1px solid var(--line);
    padding:8px 32px 22px;
    gap:2px;
    max-height:0;
    overflow:hidden;
    opacity:0;
    visibility:hidden;
    transition:max-height 0.3s ease, opacity 0.25s ease, visibility 0s linear 0.3s;
  }
  body.wikioptics-landing .nav-links a{
    padding:13px 0;
    font-size:16px;
    opacity:0.85;
    border-bottom:1px solid var(--line);
  }
  body.wikioptics-landing .nav-links li:last-child a{border-bottom:none;}
  body.wikioptics-landing .nav-toggle-input:checked ~ .nav-links{
    max-height:420px;
    opacity:1;
    visibility:visible;
    transition:max-height 0.3s ease, opacity 0.25s ease, visibility 0s;
  }
}
@media (max-width: 560px){
  body.wikioptics-landing .topics-grid{grid-template-columns:1fr;}
  body.wikioptics-landing .doctors-grid{grid-template-columns:1fr;}
  body.wikioptics-landing .snellen{padding:28px 20px;}
  body.wikioptics-landing .hero{padding:60px 0 40px;}
  body.wikioptics-landing .section{padding:64px 0;}
}
@media (max-width: 480px){
  body.wikioptics-landing .wrap{padding:0 20px;}
  body.wikioptics-landing .trust-strip .wrap{padding:22px 20px;}
  body.wikioptics-landing .chat-section{margin:0 20px; padding:36px 22px;}
  body.wikioptics-landing .partner-banner{margin:0 20px; padding:28px 24px;}
  body.wikioptics-landing .nav-links{padding:8px 20px 20px;}
  body.wikioptics-landing .snellen{padding:24px 16px;}
  body.wikioptics-landing .snellen-row:nth-child(1){font-size:32px;}
  body.wikioptics-landing .snellen-row:nth-child(2){font-size:24px;}
  body.wikioptics-landing .snellen-row:nth-child(3){font-size:18px;}
  body.wikioptics-landing .snellen-row:nth-child(4){font-size:13px;}
  body.wikioptics-landing .snellen-row:nth-child(5){font-size:9.5px; letter-spacing:0.05em;}
  body.wikioptics-landing .az-grid{column-gap:24px;}
  body.wikioptics-landing .partner-logo{font-size:20px; padding:10px 20px;}
}

@media (prefers-reduced-motion: reduce){
  body.wikioptics-landing .snellen-row{animation:none; opacity:1;}
  body.wikioptics-landing .nav-links,
  body.wikioptics-landing .nav-toggle-input:checked ~ .nav-links{transition:none;}
}