/*
Theme Name: KRN Optical Clinical v4
Theme URI: https://krnoptical.com/
Author: KRN Optical
Description: Clean clinical medical theme for KRN Optical — eyewear, eye health and vision guides. Crisp white, teal primary, soft cyan accents, dark slate text.
Version: 4.8.2
License: GNU General Public License v2 or later
Text Domain: krnoptical
*/

/* ============ Tokens & base ============ */
:root{
  --white:#ffffff;
  --cyan-soft:#e6f4f3;
  --cyan-line:#d2e9e7;
  --teal:#0e7c7b;
  --teal-deep:#0a5a59;
  --teal-faint:#eef8f7;
  --ink:#1f2d3d;
  --muted:#5b6b7c;
  --line:#e3eaef;
  --card:#ffffff;
  --sans:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{background:var(--white);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.65}
img{max-width:100%;height:auto}
a{color:var(--teal);text-decoration:none}
a:hover{color:var(--teal-deep)}
h1,h2,h3,h4{font-family:var(--sans);font-weight:700;line-height:1.25;color:var(--ink);letter-spacing:-.01em}
.wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.section{padding:60px 0}
.section.alt{background:var(--cyan-soft)}
.sec-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:28px;gap:16px}
.sec-head h2{font-size:32px}
.sec-head h2 .accent{color:var(--teal)}
.sec-head .more{font-size:14px;font-weight:600;white-space:nowrap}
.kicker{display:inline-block;background:var(--teal);color:#fff;font-size:11px;font-weight:700;letter-spacing:1.2px;text-transform:uppercase;padding:5px 12px;border-radius:999px;margin-bottom:12px}
.kicker.on-dark{background:var(--teal)}

/* ============ Header ============ */
.topbar{background:var(--teal-deep);color:#e8f4f3;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;padding-top:8px;padding-bottom:8px}
.masthead{background:var(--white);border-bottom:1px solid var(--line);padding:22px 20px 18px}
.masthead .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand-logo img{height:56px;width:auto}
.brand-name{font-size:34px;font-weight:800;color:var(--teal)}
.brand-name span{color:var(--ink)}
.brand-tag{color:var(--muted);font-size:13px;margin-top:4px}
.mainnav{background:var(--white);position:sticky;top:0;z-index:50;border-bottom:1px solid var(--line);box-shadow:0 2px 12px rgba(14,124,123,.06)}
.mainnav .wrap{display:flex;align-items:center;justify-content:space-between}
.mainnav ul{list-style:none;display:flex;flex-wrap:wrap}
.mainnav ul li a{display:block;color:var(--ink);font-size:14px;font-weight:600;padding:16px 16px;border-bottom:3px solid transparent}
.mainnav ul li a:hover{color:var(--teal);border-bottom-color:var(--teal)}
.search-toggle{background:none;border:0;color:var(--ink);cursor:pointer;padding:12px}
.search-toggle svg{width:20px;height:20px;fill:currentColor;display:block}
.search-panel{display:none;background:var(--cyan-soft);padding:12px 0}
.search-panel.open{display:block}
.search-panel form{display:flex;gap:8px;max-width:560px;margin:0 auto}
.search-panel input[type=search]{flex:1;padding:10px 14px;border:1px solid var(--cyan-line);border-radius:8px;font-size:15px}
.search-panel button{background:var(--teal);color:#fff;border:0;border-radius:8px;padding:10px 20px;font-weight:700;cursor:pointer}

/* ============ Hero (clean clinical, eye-chart motif) ============ */
.hero-wrap{position:relative;overflow:hidden;background:linear-gradient(180deg,var(--teal-faint),var(--white))}
.eye-chart{position:absolute;top:-10px;right:4%;font-weight:800;color:rgba(14,124,123,.08);font-size:120px;line-height:.95;letter-spacing:.25em;text-align:right;user-select:none;pointer-events:none;white-space:pre}
.hero-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:24px;position:relative}
.hero-main{position:relative;border-radius:16px;overflow:hidden;min-height:460px;display:flex;align-items:flex-end;background:var(--teal-deep);box-shadow:0 12px 32px rgba(14,124,123,.16)}
.hero-main .hero-img{position:absolute;inset:0}
.hero-main .hero-img img{width:100%;height:100%;object-fit:cover}
.hero-main .hero-text{position:relative;padding:32px;background:linear-gradient(transparent,rgba(10,90,89,.94));color:#fff;width:100%}
.hero-main h2{font-size:38px;color:#fff;margin:10px 0 12px}
.hero-main h2 a{color:#fff}
.hero-main h2 a:hover{color:#bfe6e4}
.hero-main .excerpt{color:#e3f2f1;font-size:16px;max-width:640px}
.hero-side{display:grid;gap:24px}
.hero-card{position:relative;border-radius:16px;overflow:hidden;min-height:218px;display:flex;align-items:flex-end;background:var(--teal-deep);box-shadow:0 8px 22px rgba(14,124,123,.14)}
.hero-card .hero-img{position:absolute;inset:0}
.hero-card .hero-img img{width:100%;height:100%;object-fit:cover}
.hero-card .hero-text{position:relative;padding:22px;background:linear-gradient(transparent,rgba(10,90,89,.94));color:#fff;width:100%}
.hero-card h3{font-size:21px;color:#fff}
.hero-card h3 a{color:#fff}
.hero-card h3 a:hover{color:#bfe6e4}
.meta{font-size:13px;color:var(--muted);margin-top:8px}
.hero-main .meta,.hero-card .meta{color:#cfe8e7}
.meta .dot{margin:0 8px}

/* ============ Category tiles ============ */
.cat-tiles{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cat-tile{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:26px 20px;text-align:center;transition:transform .15s,box-shadow .15s;box-shadow:0 4px 14px rgba(31,45,61,.05)}
.cat-tile:hover{transform:translateY(-3px);box-shadow:0 12px 28px rgba(14,124,123,.14)}
.cat-tile .tile-icon{width:52px;height:52px;margin:0 auto 12px;border-radius:50%;background:var(--cyan-soft);display:flex;align-items:center;justify-content:center}
.cat-tile .tile-icon svg{width:28px;height:28px;fill:var(--teal)}
.cat-tile h3{font-size:18px;margin-bottom:6px}
.cat-tile h3 a{color:var(--ink)}
.cat-tile p{font-size:13px;color:var(--muted)}
.cat-tile .count{display:inline-block;margin-top:10px;font-size:12px;font-weight:700;color:var(--teal)}

/* ============ Cards ============ */
.cards-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 4px 14px rgba(31,45,61,.05)}
.card:hover{box-shadow:0 12px 28px rgba(14,124,123,.12)}
.card-img{aspect-ratio:16/10;overflow:hidden;background:var(--cyan-soft)}
.card-img img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .25s}
.card:hover .card-img img{transform:scale(1.04)}
.card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.card-body h3{font-size:19px;margin:8px 0 10px}
.card-body h3 a{color:var(--ink)}
.card-body h3 a:hover{color:var(--teal)}
.card-body .excerpt{font-size:14.5px;color:var(--muted);flex:1}
.card-readmore{display:inline-block;align-self:flex-start;margin:14px 0 12px;background:var(--teal);color:#fff;font-size:13.5px;font-weight:700;letter-spacing:.3px;padding:9px 22px;border-radius:999px;transition:background .15s ease,transform .15s ease}
.card-readmore:hover{background:var(--teal-deep);color:#fff;transform:translateY(-1px)}
.mt-ad-header{margin:18px 0;display:flex;justify-content:center}
.mt-ad-incontent{margin:24px 0;display:flex;justify-content:center}
.side-ad{display:flex;justify-content:center}
/* Sidebar ad positions: unit 3 right below search, unit 20 below recent posts */
.sidebar{display:flex;flex-direction:column}
.sidebar>*{order:10}
.sidebar .widget_search{order:1}
.sidebar .side-search{order:1}
.sidebar .side-ad-3{order:2}
.sidebar .widget_recent_entries{order:3}
.sidebar .side-latest{order:3}
.sidebar .widget_recent_comments{order:4}
.sidebar .side-ad-20{order:5}
.thumb-fallback{width:100%;height:100%;background:linear-gradient(135deg,var(--teal) 0%,#14908f 60%,#7cc9c7 130%)}

/* ============ Iris divider band ============ */
.iris-band{background:linear-gradient(135deg,var(--teal),var(--teal-deep));color:#f2faf9;text-align:center;padding:64px 20px;position:relative;overflow:hidden}
.iris-band::before{content:"";position:absolute;width:520px;height:520px;border:2px solid rgba(255,255,255,.16);border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%)}
.iris-band::after{content:"";position:absolute;width:340px;height:340px;border:2px solid rgba(255,255,255,.13);border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%)}
.iris-band .iris-dot{position:absolute;width:88px;height:88px;background:#fff;border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%);opacity:.92;box-shadow:0 0 0 14px rgba(255,255,255,.18)}
.iris-band h2{color:#fff;font-size:34px;position:relative;margin-bottom:12px}
.iris-band p{position:relative;max-width:640px;margin:0 auto;color:#d8edec;font-size:17px}

/* ============ Guides (numbered list) ============ */
.guides-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.guide-card{display:flex;gap:18px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:0 4px 14px rgba(31,45,61,.05)}
.guide-num{font-size:40px;font-weight:800;color:var(--teal);line-height:1;min-width:56px;opacity:.85}
.guide-card h3{font-size:19px;margin-bottom:8px}
.guide-card h3 a{color:var(--ink)}
.guide-card .excerpt{font-size:14.5px;color:var(--muted)}

/* ============ FAQ ============ */
.faq-list{max-width:820px;margin:0 auto}
.faq-list details{background:var(--card);border:1px solid var(--line);border-radius:12px;margin-bottom:12px;padding:18px 22px;box-shadow:0 3px 10px rgba(31,45,61,.04)}
.faq-list summary{font-size:18px;font-weight:700;cursor:pointer;color:var(--teal-deep)}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{content:"+";float:right;color:var(--teal);font-size:24px;line-height:1}
.faq-list details[open] summary::after{content:"–"}
.faq-list details p{margin-top:12px;color:#3c4b5c;font-size:15.5px}

/* ============ Newsletter band ============ */
.newsletter-band{background:linear-gradient(135deg,var(--teal),var(--teal-deep));border-radius:18px;padding:52px 40px;text-align:center;color:#eef8f7;max-width:960px;margin:0 auto;box-shadow:0 14px 34px rgba(14,124,123,.22)}
.newsletter-band h2{color:#fff;font-size:32px;margin-bottom:10px}
.newsletter-band h2 .accent{color:#bfe6e4}
.newsletter-band p{color:#d3eae9;max-width:560px;margin:0 auto 24px}
.newsletter-band form{display:flex;gap:10px;max-width:520px;margin:0 auto}
.newsletter-band input[type=email]{flex:1;padding:14px 18px;border:0;border-radius:10px;font-size:16px}
.newsletter-band button{background:#fff;color:var(--teal-deep);border:0;border-radius:10px;padding:14px 30px;font-size:15px;font-weight:700;letter-spacing:1px;text-transform:uppercase;cursor:pointer}
.newsletter-band button:hover{background:var(--cyan-soft)}
.newsletter-band .fine{font-size:12.5px;margin:14px 0 0;color:#bcdcdc}
.nl-msg{margin:14px 0 0;font-size:15px;font-weight:600}
.nl-msg.ok{color:#b9ecd9}
.nl-msg.err{color:#ffc9c2}

/* ============ Trust row ============ */
.trust-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:26px}
.trust-badge{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--cyan-line);border-radius:999px;padding:10px 20px;font-size:14px;font-weight:600;color:var(--teal-deep);box-shadow:0 3px 10px rgba(14,124,123,.08)}
.trust-badge svg{width:20px;height:20px;fill:var(--teal)}

/* ============ Single post ============ */
.crumbs{font-size:13.5px;color:var(--muted);margin:26px 0 18px}
.crumbs a{color:var(--teal)}
.crumbs .sep{margin:0 8px;color:#b9c8d2}
.post-layout{display:grid;grid-template-columns:1fr 320px;gap:40px;align-items:start}
.post-head h1{font-size:40px;margin:12px 0 14px;letter-spacing:-.015em}
.byline{display:flex;flex-wrap:wrap;gap:8px 18px;align-items:center;font-size:14px;color:var(--muted);margin-bottom:8px}
.byline .reviewed{display:inline-flex;align-items:center;gap:6px;background:#e9f6f1;border:1px solid #c9e6d8;color:#1f7a4d;font-weight:600;border-radius:999px;padding:4px 14px;font-size:13px}
.byline .reviewed svg{width:15px;height:15px;fill:#1f7a4d}
.post-thumb{margin:22px 0;border-radius:14px;overflow:hidden;box-shadow:0 8px 24px rgba(31,45,61,.1)}
.post-thumb img{width:100%;height:auto;display:block}
.entry{font-size:17.5px;line-height:1.75;color:#2b3a4c}
.entry p{margin-bottom:1.4em}
.entry h2{font-size:29px;margin:1.6em 0 .7em}
.entry h3{font-size:22px;margin:1.4em 0 .6em}
.entry ul,.entry ol{margin:0 0 1.4em 1.4em}
.entry li{margin-bottom:.5em}
.entry blockquote{border-left:4px solid var(--teal);background:var(--teal-faint);padding:16px 22px;margin:0 0 1.4em;border-radius:0 10px 10px 0}
.entry table{width:100%;border-collapse:collapse;margin:0 0 1.4em;font-size:15px}
.entry th{background:var(--teal);color:#fff;text-align:left;padding:10px 14px}
.entry td{border:1px solid var(--line);padding:10px 14px}
.entry th{border:1px solid var(--teal)}
.post-tags{margin:28px 0;font-size:14px}
.post-tags a{display:inline-block;background:var(--cyan-soft);border:1px solid var(--cyan-line);border-radius:999px;padding:5px 14px;margin:0 6px 8px 0;color:var(--teal-deep)}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:10px 0 50px}
.post-nav a{display:block;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;color:var(--ink);box-shadow:0 3px 10px rgba(31,45,61,.04)}
.post-nav .label{font-size:12px;text-transform:uppercase;letter-spacing:1px;color:var(--teal);font-weight:700}
.post-nav .next{text-align:right}

/* ============ Sidebar ============ */
.sidebar .side-widget{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:24px;box-shadow:0 4px 14px rgba(31,45,61,.05)}
.side-title{font-size:19px;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--teal)}
.sidebar form{display:flex;gap:8px}
.sidebar input[type=search]{flex:1;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font-size:14px;min-width:0}
.sidebar button{background:var(--teal);color:#fff;border:0;border-radius:8px;padding:10px 16px;font-weight:700;cursor:pointer}
.side-posts{list-style:none}
.side-posts li{display:flex;gap:12px;margin-bottom:16px}
.side-posts li:last-child{margin-bottom:0}
.sp-thumb{width:76px;height:60px;border-radius:8px;overflow:hidden;flex-shrink:0;background:var(--cyan-soft)}
.sp-thumb img{width:100%;height:100%;object-fit:cover}
.side-posts h4{font-size:15px;line-height:1.35}
.side-posts h4 a{color:var(--ink)}
.side-posts .meta{font-size:12px;margin-top:4px}

/* ============ Archive / cards pages ============ */
.page-head{padding:48px 0 8px;text-align:center}
.page-head h1{font-size:42px;margin-bottom:10px}
.page-head p{color:var(--muted);max-width:640px;margin:0 auto}
.pagination{display:flex;gap:10px;justify-content:center;margin:40px 0 60px}
.pagination a,.pagination span{display:inline-block;min-width:44px;text-align:center;padding:10px 14px;border:1px solid var(--line);border-radius:10px;background:var(--card);color:var(--teal);font-weight:600}
.pagination .current{background:var(--teal);color:#fff;border-color:var(--teal)}

/* ============ Footer ============ */
footer{background:var(--teal-deep);color:#cfe3e2;margin-top:20px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px;padding:56px 0 40px}
.foot-grid h4{color:#fff;font-size:16px;margin-bottom:16px;text-transform:uppercase;letter-spacing:1px}
.foot-brand .brand-name{font-size:28px;color:#fff}
.foot-brand p{font-size:14.5px;margin-top:12px;max-width:300px}
.foot-grid ul{list-style:none}
.foot-grid ul li{margin-bottom:10px}
.foot-grid ul a{color:#cfe3e2;font-size:14.5px}
.foot-grid ul a:hover{color:#fff}
.copybar{border-top:1px solid rgba(255,255,255,.14);padding:18px 0;font-size:13.5px}
.copybar .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.copybar a{color:#cfe3e2;margin-left:16px}

/* ============ Misc templates ============ */
.nothing-found{text-align:center;padding:80px 20px}
.nothing-found h1{font-size:52px;margin-bottom:14px}
.big-search{max-width:520px;margin:26px auto;display:flex;gap:8px}
.big-search input[type=search]{flex:1;padding:13px 16px;border:1px solid var(--line);border-radius:10px;font-size:16px}
.big-search button{background:var(--teal);color:#fff;border:0;border-radius:10px;padding:13px 26px;font-weight:700;cursor:pointer}

/* ============ Responsive ============ */
@media (max-width:1024px){
  .cat-tiles{grid-template-columns:repeat(3,1fr)}
  .cards-grid{grid-template-columns:repeat(2,1fr)}
  .post-layout{grid-template-columns:1fr}
  .sidebar{display:grid;grid-template-columns:1fr 1fr;gap:20px}
  .sidebar .side-widget{margin-bottom:0}
  .foot-grid{grid-template-columns:1fr 1fr}
  .eye-chart{font-size:80px}
}
@media (max-width:760px){
  .hero-grid{grid-template-columns:1fr}
  .hero-main{min-height:340px}
  .hero-main h2{font-size:29px}
  .cat-tiles{grid-template-columns:repeat(2,1fr)}
  .cards-grid{grid-template-columns:1fr}
  .guides-grid{grid-template-columns:1fr}
  .newsletter-band form{flex-direction:column}
  .mainnav ul li a{padding:12px 10px;font-size:12.5px}
  .post-head h1{font-size:31px}
  .sidebar{grid-template-columns:1fr}
  .sec-head h2{font-size:26px}
  .brand-logo img{height:46px}
  .iris-band h2{font-size:27px}
  .post-nav{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:26px}
  .masthead .wrap{flex-direction:column;text-align:center}
  .eye-chart{display:none}
}

/* ============ Hero banner (v2) ============ */
.krn-banner{background:linear-gradient(180deg,#f2faf9 0%,#eaf6f5 100%);padding:56px 0 8px;position:relative;overflow:hidden}
.krn-banner-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.krn-banner-text h1{font-size:52px;line-height:1.12;letter-spacing:-.5px;color:var(--ink);margin:0 0 14px}
.krn-banner-sub{font-size:18px;color:var(--muted);max-width:46ch}
.krn-banner-img img{border-radius:18px;box-shadow:0 18px 44px rgba(14,124,123,.16);display:block;width:100%}
/* Insights cards */
.krn-insights{padding-top:34px}
.section-title{text-align:center;font-size:30px;margin:0 0 26px;color:var(--ink)}
.krn-insights-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.krn-insight-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:28px 24px;display:block;color:var(--ink);box-shadow:0 8px 22px rgba(31,45,61,.06);transition:transform .18s ease,box-shadow .18s ease}
.krn-insight-card:hover{transform:translateY(-3px);box-shadow:0 14px 30px rgba(14,124,123,.12);color:var(--ink)}
.krn-insight-icon{display:inline-flex;width:44px;height:44px;border-radius:50%;background:var(--teal-faint);color:var(--teal);align-items:center;justify-content:center;margin-bottom:14px}
.krn-insight-icon svg{width:24px;height:24px}
.krn-pill{display:inline-block;background:#cdeae9;color:#0a5a59;font-size:12.5px;font-weight:700;letter-spacing:.4px;padding:5px 12px;border-radius:999px;margin-bottom:12px}
.krn-insight-card h3{font-size:19px;line-height:1.35;margin:0 0 8px}
.krn-insight-card p{font-size:15px;color:var(--muted);margin:0}
/* Trust row */
.krn-trust-row{display:flex;flex-wrap:wrap;gap:14px 34px;justify-content:center;margin:34px 0 6px}
.krn-trust{display:inline-flex;align-items:center;gap:9px;font-size:15px;font-weight:600;color:var(--ink)}
.krn-trust svg{width:22px;height:22px;color:var(--teal);flex:none}
@media(max-width:900px){
  .krn-banner-grid{grid-template-columns:1fr}
  .krn-banner-text h1{font-size:36px}
  .krn-insights-grid{grid-template-columns:1fr}
}