/*
Theme Name: Educate
Theme URI: https://educate.choroida.com
Author: Choroida LTD.
Author URI: https://choroida.com
Description: Clean, clinical ophthalmology-education theme for educate.choroida.com. Mayo-inspired: one institutional blue, generous whitespace, a single sans typeface, a big search, an A–Z index and subspecialty browsing. Lightweight and fast, built for a large article library.
Version: 1.0.7
Requires at least: 6.0
Tested up to: 6.6
Requires PHP: 7.4
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: educate-mayo
*/

/* ============================================================
   DESIGN TOKENS — Mayo-flavour: institutional navy + link blue,
   lots of white, one sans typeface, hairline cards.
   ============================================================ */
:root{
  --page:#ffffff;
  --bg:#f5f7f9;
  --surface:#ffffff;
  --ink:#1b1f24;
  --ink-soft:#5a6472;
  --line:#e2e7ec;
  --navy:#0a3d6e;
  --navy-deep:#072a4d;
  --link:#1569c7;
  --link-soft:#e8f0fa;
  --ring:rgba(21,105,199,.28);
  --sans:"Source Sans 3","Segoe UI",system-ui,Arial,sans-serif;
  --maxw:1120px;
  --radius:12px;
}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]){
    --page:#0d1319;--bg:#0f1720;--surface:#141d27;--ink:#e9eef3;--ink-soft:#9aa6b3;
    --line:#223040;--navy:#4f9fe0;--navy-deep:#0b1824;--link:#6bb0ee;--link-soft:#15314a;
    --ring:rgba(107,176,238,.32);color-scheme:dark;
  }
}
:root[data-theme="dark"]{
  --page:#0d1319;--bg:#0f1720;--surface:#141d27;--ink:#e9eef3;--ink-soft:#9aa6b3;
  --line:#223040;--navy:#4f9fe0;--navy-deep:#0b1824;--link:#6bb0ee;--link-soft:#15314a;
  --ring:rgba(107,176,238,.32);color-scheme:dark;
}

/* ============================================================ RESET ============================================================ */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--page);color:var(--ink);font-family:var(--sans);font-size:17px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:var(--link);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0;line-height:1.2;font-weight:700;letter-spacing:-.01em;text-wrap:balance}
button{font-family:inherit}
:focus-visible{outline:3px solid var(--ring);outline-offset:2px}
.skip-link{position:absolute;left:-9999px}
.skip-link:focus{left:16px;top:10px;z-index:100;background:var(--surface);padding:10px 14px;border-radius:8px;border:1px solid var(--line)}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:24px}
.screen-reader-text{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(1px,1px,1px,1px)}

/* ============================================================ UTILITY BAR ============================================================ */
.util{border-bottom:1px solid var(--line);background:var(--surface);font-size:13px}
.util .wrap{display:flex;gap:20px;align-items:center;min-height:36px;flex-wrap:wrap}
.util a{color:var(--ink-soft)}
.util a:hover{color:var(--link)}
.util .sp{margin-left:auto}

/* ============================================================ HEADER ============================================================ */
.site-header{background:var(--surface);border-bottom:1px solid var(--line);position:sticky;top:env(safe-area-inset-top,0px);z-index:40}
/* keep the sticky header clear of the WordPress admin bar for logged-in users */
.admin-bar .site-header{top:calc(env(safe-area-inset-top,0px) + 32px)}
@media screen and (max-width:782px){.admin-bar .site-header{top:46px}}
/* Row 1: logo (centered). Row 2: navigation. */
.site-header .header-top{display:flex;align-items:center;justify-content:center;position:relative;min-height:84px;padding-block:10px}
.brand{display:inline-flex;align-items:center;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand .brand-logo,.brand img{max-height:62px;width:auto;display:block}
.main-nav{display:flex;justify-content:center;border-top:1px solid var(--line);background:var(--surface)}
.main-nav ul{list-style:none;margin:0;padding:7px 0;display:flex;gap:4px;flex-wrap:wrap;justify-content:center}
.main-nav a{color:var(--ink);font-weight:600;font-size:15px;padding:9px 13px;border-radius:6px;display:block}
.main-nav a:hover{background:var(--bg);color:var(--navy);text-decoration:none}
.main-nav .current-menu-item>a{color:var(--navy)}
.icon-btn{width:42px;height:42px;border:1px solid var(--line);background:var(--surface);border-radius:999px;color:var(--ink-soft);cursor:pointer;font-size:18px;display:grid;place-items:center}
.icon-btn:hover{border-color:var(--navy);color:var(--navy)}
.nav-toggle{display:none;position:absolute;right:0;top:50%;transform:translateY(-50%)}

/* ============================================================ HERO ============================================================ */
.hero{background:var(--bg);border-bottom:1px solid var(--line)}
.hero .wrap{padding-block:60px 54px;text-align:center}
.hero h1{font-size:clamp(30px,4.6vw,46px);line-height:1.1;max-width:720px;margin-inline:auto}
.hero .lede{color:var(--ink-soft);font-size:clamp(16px,2vw,19px);margin:16px auto 0;max-width:580px}
.hero-search{max-width:640px;margin:30px auto 0;display:flex;background:var(--surface);border:2px solid var(--navy);border-radius:999px;overflow:hidden;box-shadow:0 2px 10px rgba(10,61,110,.08)}
.hero-search input[type=search]{flex:1;min-width:0;border:0;background:transparent;color:var(--ink);font-size:16.5px;padding:15px 22px}
.hero-search input:focus{outline:none}
.hero-search button{background:var(--navy);color:#fff;border:0;padding:0 28px;font-weight:700;font-size:16px;cursor:pointer;display:flex;align-items:center;gap:8px}
.hero-search button:hover{background:var(--navy-deep)}
.hero .popular{margin-top:18px;font-size:14.5px;color:var(--ink-soft)}
.hero .popular a{font-weight:600;margin:0 7px;display:inline-block}

/* ============================================================ A–Z ============================================================ */
.az-sec{background:var(--surface);border-bottom:1px solid var(--line)}
.az-sec .wrap{padding-block:22px;text-align:center}
.az-sec .lbl{font-size:13px;letter-spacing:.07em;text-transform:uppercase;color:var(--ink-soft);font-weight:700;margin-bottom:12px}
.az-row{display:flex;flex-wrap:wrap;gap:4px;justify-content:center}
.az-row a{width:34px;height:34px;display:grid;place-items:center;border:1px solid var(--line);border-radius:7px;font-weight:700;font-size:14px;color:var(--navy);background:var(--surface)}
.az-row a:hover{background:var(--navy);color:#fff;border-color:var(--navy);text-decoration:none}

/* ============================================================ SECTION SHELL ============================================================ */
.block{padding-block:48px}
.block.alt{background:var(--bg);border-block:1px solid var(--line)}
.shead{text-align:center;margin-bottom:28px}
.shead h2{font-size:clamp(22px,3vw,30px)}
.shead .rule{width:52px;height:3px;background:var(--navy);border-radius:2px;margin:14px auto 0}
.shead p{color:var(--ink-soft);margin:12px auto 0;max-width:560px;font-size:15.5px}

/* ============================================================ SPECIALTY GRID ============================================================ */
.spec{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
.spec a{display:flex;align-items:center;gap:14px;padding:20px 22px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);color:var(--ink)}
.spec a:hover{background:var(--bg);text-decoration:none}
.spec .ic{width:44px;height:44px;border-radius:10px;background:var(--link-soft);color:var(--navy);display:grid;place-items:center;font-size:20px;flex:none}
.spec .nm{font-weight:700;font-size:16.5px;display:block}
.spec .ct{font-size:13.5px;color:var(--ink-soft)}
.spec .ct.new{color:var(--link);font-weight:700}
.spec .go{margin-left:auto;color:var(--ink-soft);font-size:18px}
.spec a:hover .go{color:var(--navy)}

/* ============================================================ FEATURED CARDS ============================================================ */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.fcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.fcard .ph{aspect-ratio:16/10;background:var(--bg);overflow:hidden}
.fcard .ph img{width:100%;height:100%;object-fit:cover}
.fcard .ph .tone{width:100%;height:100%}
.fcard .bd{padding:18px 20px 22px;display:flex;flex-direction:column;gap:8px}
.fcard .cat{font-size:12px;letter-spacing:.05em;text-transform:uppercase;font-weight:700;color:var(--navy)}
.fcard h3{font-size:19px;line-height:1.3}
.fcard h3 a{color:var(--ink)}
.fcard h3 a:hover{color:var(--navy)}
.fcard p{font-size:14px;color:var(--ink-soft);margin:0}
.fcard .rm{font-weight:700;font-size:14px;margin-top:4px}

/* ============================================================ LIST (latest / archive / search) ============================================================ */
.llist{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.llist .row{display:flex;align-items:center;gap:16px;padding:18px 22px;border-bottom:1px solid var(--line);color:var(--ink)}
.llist .row:last-child{border-bottom:0}
.llist a.row:hover{background:var(--bg);text-decoration:none}
.llist .thumb{width:72px;height:54px;border-radius:8px;flex:none;object-fit:cover;background:var(--bg)}
.llist .thumb.tone{display:block}
.llist .tx{min-width:0;flex:1}
.llist .cat{font-size:11.5px;letter-spacing:.05em;text-transform:uppercase;font-weight:700;color:var(--navy)}
.llist h3{font-size:17px;line-height:1.3;margin-top:3px}
.llist h3 a{color:var(--ink)}
.llist h3 a:hover{color:var(--navy)}
.llist .meta{font-size:13px;color:var(--ink-soft);margin-top:3px}
.llist .go{margin-left:auto;color:var(--ink-soft);font-size:20px;flex:none}

.center-btn{text-align:center;margin-top:28px}
.btn-out{display:inline-block;border:2px solid var(--navy);color:var(--navy);font-weight:700;padding:12px 28px;border-radius:999px;font-size:15px}
.btn-out:hover{background:var(--navy);color:#fff;text-decoration:none}

/* ============================================================ CARE / TRUST BAND ============================================================ */
.care{background:var(--link-soft);border-block:1px solid var(--line)}
.care .wrap{padding-block:40px;display:flex;gap:28px;align-items:center;flex-wrap:wrap}
.care .ic{width:60px;height:60px;border-radius:50%;background:var(--surface);color:var(--navy);display:grid;place-items:center;font-size:26px;flex:none;border:1px solid var(--line)}
.care h3{font-size:21px}
.care p{color:var(--ink-soft);margin:6px 0 0;max-width:620px;font-size:15px}
.care .act{margin-left:auto}

/* ============================================================ SINGLE ARTICLE ============================================================ */
.reading-progress{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--navy),var(--link));z-index:60}
.article-head{padding-top:26px}
.breadcrumb{font-size:13px;color:var(--ink-soft);display:flex;gap:7px;flex-wrap:wrap;align-items:center}
.breadcrumb a{font-weight:600}
.article-cat{margin-top:16px;font-size:12px;letter-spacing:.06em;text-transform:uppercase;font-weight:700;color:var(--navy)}
.article-head h1{font-size:clamp(27px,3.8vw,42px);line-height:1.12;margin-top:8px}
.article-dek{font-size:18px;color:var(--ink-soft);margin-top:12px;max-width:66ch}
.article-meta{display:flex;align-items:center;gap:13px;flex-wrap:wrap;margin-top:18px;padding-bottom:22px;border-bottom:1px solid var(--line)}
.article-meta .av{width:42px;height:42px;border-radius:50%;background:var(--bg);color:var(--navy);display:grid;place-items:center;font-weight:800;flex:none}
.article-meta .who b{font-weight:650}
.article-meta .who span{display:block;font-size:12.5px;color:var(--ink-soft)}
.article-meta .rev{margin-left:auto;display:flex;gap:18px;flex-wrap:wrap}
.article-meta .rev div{font-size:12px;color:var(--ink-soft)}
.article-meta .rev b{display:block;color:var(--ink);font-size:13px;font-weight:600}
.article-meta .chk{color:var(--navy);font-weight:700}
.article-hero-img{margin-top:22px;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line)}

.article-body{display:grid;grid-template-columns:230px 1fr;gap:40px;padding-block:28px 40px;align-items:start}
.toc{position:sticky;top:96px;align-self:start}
.toc h4{font-size:11.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);margin-bottom:11px}
.toc ul{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}
.toc li a{display:block;font-size:13.5px;color:var(--ink-soft);padding:6px 0 6px 13px;margin-left:-2px;border-left:2px solid transparent}
.toc li a:hover{color:var(--ink);text-decoration:none}
.toc li a.active{color:var(--navy);font-weight:650;border-left-color:var(--navy)}
.toc-quiz{margin-top:18px;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:13px}
.toc-quiz b{font-size:13px}
.toc-quiz p{font-size:12px;color:var(--ink-soft);margin:5px 0 10px}
.toc-quiz a{display:block;text-align:center;background:var(--navy);color:#fff;border-radius:8px;padding:9px;font-weight:650;font-size:13px}
.toc-quiz a:hover{background:var(--navy-deep);color:#fff;text-decoration:none}

.entry-content{min-width:0;font-size:17.5px}
.entry-content > *{margin-block:0 18px}
.entry-content h2{font-size:26px;margin-top:34px;margin-bottom:10px;scroll-margin-top:96px}
.entry-content h3{font-size:20px;margin-top:24px;margin-bottom:8px}
.entry-content p{margin-bottom:17px}
.entry-content ul,.entry-content ol{padding-left:22px;margin-bottom:17px}
.entry-content li{margin-bottom:8px}
.entry-content img{border-radius:var(--radius);margin-block:8px 6px}
.entry-content figure{margin:8px 0 22px}
.entry-content figcaption{font-size:13px;color:var(--ink-soft);margin-top:8px}
.entry-content blockquote{border-left:4px solid var(--navy);background:var(--bg);margin:0 0 20px;padding:14px 18px;border-radius:0 10px 10px 0}
.entry-content a{font-weight:600}
.entry-content table{width:100%;border-collapse:collapse;margin-bottom:20px;font-size:15px}
.entry-content th,.entry-content td{border:1px solid var(--line);padding:9px 12px;text-align:left}
.entry-content th{background:var(--bg)}
/* key-points box: author wraps points in a .key-points list or a blockquote with class */
.key-points{background:var(--link-soft);border:1px solid var(--line);border-left:4px solid var(--navy);border-radius:12px;padding:17px 19px 17px 36px;margin-bottom:22px}
.key-points li{font-size:15.5px}

.author-box{display:flex;gap:16px;align-items:flex-start;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-top:10px}
.author-box .av{width:56px;height:56px;border-radius:50%;background:var(--surface);color:var(--navy);display:grid;place-items:center;font-weight:800;font-size:20px;flex:none;border:1px solid var(--line)}
.author-box img{width:56px;height:56px;border-radius:50%;flex:none}
.author-box b{font-size:15.5px}
.author-box .role{font-size:12.5px;color:var(--navy);font-weight:600}
.author-box p{font-size:13.5px;color:var(--ink-soft);margin:7px 0 0}

.related{padding-top:30px;border-top:1px solid var(--line);margin-top:30px}
.related h2{font-size:22px;margin-bottom:16px}
.rel3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.rel{border:1px solid var(--line);border-radius:11px;overflow:hidden;background:var(--surface);display:block;color:var(--ink)}
.rel:hover{text-decoration:none}
.rel .ph{aspect-ratio:16/9;background:var(--bg)}
.rel .ph img{width:100%;height:100%;object-fit:cover}
.rel .bd{padding:11px 14px 15px}
.rel .cat{font-size:10.5px;letter-spacing:.05em;text-transform:uppercase;font-weight:700;color:var(--navy)}
.rel h3{font-size:15.5px;line-height:1.3;margin-top:5px}
.rel:hover h3{color:var(--navy)}

/* ============================================================ GENERIC PAGE / ARCHIVE HEADER ============================================================ */
.page-hero{background:var(--bg);border-bottom:1px solid var(--line)}
.page-hero .wrap{padding-block:46px}
.page-hero h1{font-size:clamp(26px,3.4vw,38px)}
.page-hero p{color:var(--ink-soft);margin-top:10px;font-size:16px}
.page-content{padding-block:40px}
.page-content .entry-content{max-width:760px;margin-inline:auto}

/* pagination */
.pagination{margin-top:30px}
.pagination .nav-links{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;align-items:center}
.pagination .page-numbers{min-width:40px;height:40px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:8px;color:var(--navy);font-weight:600;padding:0 10px}
.pagination .page-numbers.current{background:var(--navy);color:#fff;border-color:var(--navy)}
.pagination a.page-numbers:hover{background:var(--bg);text-decoration:none}

/* ============================================================ FOOTER ============================================================ */
.site-footer{background:var(--navy-deep);color:#cdd9e6;padding-block:44px 32px;font-size:14px;margin-top:8px}
.site-footer a{color:#cdd9e6}
.site-footer a:hover{color:#fff}
.site-footer .cols{display:flex;gap:40px;flex-wrap:wrap;justify-content:space-between}
.site-footer .brandf{max-width:280px}
.site-footer .brandf .nm{color:#fff;font-weight:800;font-size:19px}
.site-footer .footer-logo{max-height:46px;width:auto;margin-bottom:4px}
.site-footer .brandf p{color:#9fb3c6;margin:10px 0 0}
.site-footer .social{display:flex;gap:10px;margin-top:16px}
.site-footer .social a{width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.22);display:grid;place-items:center;color:#cdd9e6}
.site-footer .social a:hover{background:#fff;color:var(--navy-deep);border-color:#fff}
.site-footer h4{color:#fff;font-size:13px;letter-spacing:.07em;text-transform:uppercase;margin:0 0 12px}
.site-footer ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.site-footer .legal{margin-top:30px;padding-top:20px;border-top:1px solid rgba(255,255,255,.14);display:flex;gap:16px;justify-content:space-between;flex-wrap:wrap;color:#9fb3c6}

/* ============================================================ RESPONSIVE ============================================================ */
@media (max-width:900px){
  .spec{grid-template-columns:repeat(2,1fr)}
  .grid3,.rel3{grid-template-columns:1fr 1fr}
  .main-nav{display:none}
  .main-nav.open{display:flex}
  .main-nav ul{flex-direction:column;gap:2px;width:100%;padding:10px 0}
  .main-nav a{text-align:center}
  .nav-toggle{display:grid}
  .article-body{grid-template-columns:1fr;gap:22px}
  .toc{position:static;display:none}
  .article-meta .rev{margin-left:0;width:100%}
}
@media (max-width:600px){
  body{font-size:16px}
  .spec,.grid3,.rel3{grid-template-columns:1fr}
  .spec a{border-right:0}
  .care .act{margin-left:0;width:100%}
  .hero-search button span{display:none}
  .llist .thumb{display:none}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important}
  .reading-progress{transition:none}
}