/*
Theme Name: My High School Notes
Theme URI: https://myhighschoolnotes.com
Author: MyHighSchoolNotes.com
Author URI: https://myhighschoolnotes.com
Description: Fast, responsive and SEO-focused WordPress theme for Nigerian secondary school lesson notes, schemes of work, examinations and quizzes.
Version: 1.3.0
Requires at least: 6.4
Tested up to: 6.8
Requires PHP: 7.4
Text Domain: myhighschoolnotes
*/

:root{
  --mhs-navy:#123f78;
  --mhs-blue:#1497d4;
  --mhs-blue-2:#0d6fbb;
  --mhs-gold:#f3ad1a;
  --mhs-green:#1f9d61;
  --mhs-ink:#162234;
  --mhs-muted:#617083;
  --mhs-bg:#f5f8fc;
  --mhs-card:#ffffff;
  --mhs-line:#dfe7f0;
  --mhs-radius:18px;
  --mhs-shadow:0 12px 34px rgba(18,63,120,.08);
  --mhs-max:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:#fff;color:var(--mhs-ink);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:var(--mhs-blue-2);text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}
img{max-width:100%;height:auto;display:block}
button,input,select,textarea{font:inherit}
.container{width:min(calc(100% - 32px),var(--mhs-max));margin-inline:auto}
.screen-reader-text{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.skip-link:focus{left:16px;top:16px;width:auto;height:auto;padding:10px 14px;background:#fff;z-index:9999;border-radius:8px;box-shadow:var(--mhs-shadow)}

.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.97);border-bottom:1px solid rgba(223,231,240,.85);backdrop-filter:saturate(170%) blur(12px)}
.header-row{min-height:76px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;min-width:230px}
.brand img{width:258px;max-height:58px;object-fit:contain;object-position:left center}
.site-title-text{font-weight:800;color:var(--mhs-navy);font-size:1.18rem;line-height:1.2}
.primary-nav{margin-left:auto}
.primary-nav ul{display:flex;align-items:center;gap:8px;list-style:none;margin:0;padding:0}
.primary-nav a{display:block;padding:10px 11px;color:var(--mhs-ink);font-size:.93rem;font-weight:700;border-radius:10px}
.primary-nav a:hover,.primary-nav .current-menu-item>a{color:var(--mhs-navy);background:#eef6ff;text-decoration:none}
.header-search{display:flex;align-items:center;gap:6px}
.header-search input{width:180px;border:1px solid var(--mhs-line);border-radius:999px;padding:10px 14px;background:#f8fbff;outline:none}
.header-search input:focus{border-color:var(--mhs-blue);box-shadow:0 0 0 3px rgba(20,151,212,.12)}
.menu-toggle{display:none;border:0;background:#eef6ff;color:var(--mhs-navy);width:42px;height:42px;border-radius:11px;font-size:1.3rem;cursor:pointer}

.hero{background:linear-gradient(135deg,#eef8ff 0%,#f9fbff 54%,#fff8e7 100%);padding:72px 0 64px;overflow:hidden;border-bottom:1px solid var(--mhs-line)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:46px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.82rem;text-transform:uppercase;letter-spacing:.12em;font-weight:800;color:var(--mhs-blue-2);background:#e8f5ff;padding:8px 12px;border-radius:999px}
.hero h1{margin:18px 0 16px;font-size:clamp(2.35rem,5vw,4.4rem);line-height:1.05;letter-spacing:-.04em;color:var(--mhs-navy)}
.hero h1 span{color:var(--mhs-blue)}
.hero p{font-size:1.08rem;color:var(--mhs-muted);max-width:690px;margin:0 0 26px}
.hero-search{position:relative;display:flex;max-width:720px;background:#fff;border:1px solid var(--mhs-line);padding:7px;border-radius:16px;box-shadow:0 16px 45px rgba(18,63,120,.10)}
.hero-search input{flex:1;border:0;outline:0;padding:12px 14px;background:transparent;min-width:0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:12px 17px;font-weight:800;cursor:pointer;text-decoration:none}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{color:#fff;background:linear-gradient(135deg,var(--mhs-navy),var(--mhs-blue-2));box-shadow:0 8px 20px rgba(18,63,120,.18)}
.btn-outline{color:var(--mhs-navy);background:#fff;border:1px solid var(--mhs-line)}
.hero-stats{display:flex;flex-wrap:wrap;gap:18px;margin-top:24px;color:var(--mhs-muted);font-size:.9rem;font-weight:650}
.hero-stats strong{color:var(--mhs-navy)}
.hero-card-wrap{position:relative;display:flex;justify-content:center}
.hero-card{width:min(420px,100%);background:#fff;border:1px solid var(--mhs-line);border-radius:28px;padding:28px;box-shadow:0 25px 60px rgba(18,63,120,.14);transform:rotate(1deg)}
.hero-card .icon{width:72px;height:72px;border-radius:18px;background:linear-gradient(135deg,#e3f6ff,#fff5d7);display:grid;place-items:center;font-size:2.2rem;margin-bottom:16px}
.hero-card h2{margin:0 0 10px;color:var(--mhs-navy);font-size:1.45rem}
.hero-card ul{margin:0;padding-left:20px;color:var(--mhs-muted)}
.hero-card li+li{margin-top:7px}

.section{padding:70px 0}
.section.soft{background:var(--mhs-bg)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-head h2{margin:0;color:var(--mhs-navy);font-size:clamp(1.75rem,3vw,2.5rem);letter-spacing:-.03em}
.section-head p{margin:8px 0 0;color:var(--mhs-muted);max-width:720px}
.grid{display:grid;gap:20px}
.grade-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.subject-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.resource-grid{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--mhs-card);border:1px solid var(--mhs-line);border-radius:var(--mhs-radius);box-shadow:var(--mhs-shadow)}
.grade-card{padding:24px;position:relative;overflow:hidden;transition:.2s ease}
.grade-card:hover{transform:translateY(-3px);box-shadow:0 18px 45px rgba(18,63,120,.12)}
.grade-card .badge{width:54px;height:54px;border-radius:16px;display:grid;place-items:center;background:#e8f5ff;color:var(--mhs-navy);font-weight:900;margin-bottom:15px}
.grade-card h3{margin:0 0 6px;color:var(--mhs-navy);font-size:1.25rem}
.grade-card p{margin:0 0 15px;color:var(--mhs-muted);font-size:.94rem}
.grade-card a{font-weight:800}
.subject-card{padding:20px;display:flex;align-items:center;gap:13px;transition:.2s ease}
.subject-card:hover{transform:translateY(-2px);text-decoration:none}
.subject-icon{width:46px;height:46px;flex:0 0 46px;border-radius:14px;display:grid;place-items:center;background:#eef7ff;font-size:1.35rem}
.subject-card strong{color:var(--mhs-ink)}
.resource-card{padding:24px}
.resource-card .icon{font-size:1.8rem;margin-bottom:12px}
.resource-card h3{margin:0 0 6px;color:var(--mhs-navy)}
.resource-card p{margin:0 0 14px;color:var(--mhs-muted);font-size:.94rem}

.content-wrap{padding:42px 0 70px}
.breadcrumbs{font-size:.88rem;color:var(--mhs-muted);margin-bottom:20px}
.breadcrumbs a{color:var(--mhs-muted)}
.page-header{padding:34px 0 18px}
.page-header h1{margin:0;color:var(--mhs-navy);font-size:clamp(2rem,4vw,3.2rem);letter-spacing:-.035em}
.page-header p{color:var(--mhs-muted);max-width:760px}
.posts-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.post-card{overflow:hidden;display:flex;flex-direction:column;min-height:100%;transition:.2s ease}
.post-card:hover{transform:translateY(-3px);box-shadow:0 18px 42px rgba(18,63,120,.12)}
.post-thumb{aspect-ratio:16/9;background:linear-gradient(135deg,#e8f5ff,#fff4d5);display:grid;place-items:center;overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover}
.book-placeholder{font-size:3rem}
.post-card-body{padding:20px;display:flex;flex-direction:column;flex:1}
.post-meta{font-size:.79rem;color:var(--mhs-muted);font-weight:650;margin-bottom:8px}
.post-card h2,.post-card h3{margin:0 0 9px;font-size:1.12rem;line-height:1.35;color:var(--mhs-navy)}
.post-card p{color:var(--mhs-muted);font-size:.93rem;margin:0 0 16px}
.post-card .read-more{margin-top:auto;font-weight:800}

.single-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:32px;align-items:start}
.article{background:#fff;border:1px solid var(--mhs-line);border-radius:22px;padding:clamp(24px,4vw,46px);box-shadow:var(--mhs-shadow)}
.article-header h1{font-size:clamp(2rem,4vw,3rem);line-height:1.15;color:var(--mhs-navy);letter-spacing:-.03em;margin:0 0 12px}
.article-meta{color:var(--mhs-muted);font-size:.9rem;margin-bottom:24px}
.entry-content{font-size:1.02rem}
.entry-content h2,.entry-content h3,.entry-content h4{color:var(--mhs-navy);line-height:1.25;scroll-margin-top:100px}
.entry-content h2{font-size:1.65rem;margin-top:2rem}
.entry-content h3{font-size:1.3rem;margin-top:1.6rem}
.entry-content table{width:100%;border-collapse:collapse;margin:1.4rem 0;display:block;overflow-x:auto}
.entry-content th,.entry-content td{border:1px solid var(--mhs-line);padding:10px 12px;text-align:left}
.entry-content blockquote{margin:1.5rem 0;padding:14px 18px;border-left:4px solid var(--mhs-gold);background:#fff9ea;border-radius:0 12px 12px 0}
.sidebar-box{background:#fff;border:1px solid var(--mhs-line);border-radius:18px;padding:20px;margin-bottom:18px}
.sidebar-box h3{margin:0 0 12px;color:var(--mhs-navy);font-size:1.05rem}
.sidebar-box ul{list-style:none;margin:0;padding:0}
.sidebar-box li+li{border-top:1px solid var(--mhs-line)}
.sidebar-box a{display:block;padding:9px 0;font-weight:650;color:var(--mhs-ink)}
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:26px}
.post-nav a{display:block;border:1px solid var(--mhs-line);border-radius:14px;padding:14px 16px;font-weight:750;background:#f9fbfe}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:34px;flex-wrap:wrap}
.pagination .page-numbers{display:grid;place-items:center;min-width:42px;height:42px;border-radius:10px;border:1px solid var(--mhs-line);background:#fff;font-weight:750}
.pagination .current{background:var(--mhs-navy);color:#fff;border-color:var(--mhs-navy)}

.search-suggestions{position:absolute;left:0;right:0;top:calc(100% + 8px);background:#fff;border:1px solid var(--mhs-line);border-radius:14px;box-shadow:0 20px 45px rgba(18,63,120,.13);overflow:hidden;z-index:30;display:none;text-align:left}
.search-suggestions.active{display:block}
.search-suggestions a{display:block;padding:11px 14px;color:var(--mhs-ink);border-bottom:1px solid #edf1f5;font-size:.92rem}
.search-suggestions a:last-child{border-bottom:0}
.search-suggestions a:hover{background:#f4f9ff;text-decoration:none}
.empty-state{text-align:center;padding:54px 24px;background:#f8fbff;border:1px dashed #bfd3e5;border-radius:20px}

.site-footer{background:#0d2c53;color:#d8e4f1;padding:52px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.3fr repeat(3,1fr);gap:30px}
.footer-logo{width:250px;filter:brightness(0) invert(1);opacity:.98;margin-bottom:14px}
.site-footer h3{color:#fff;font-size:1rem;margin:0 0 13px}
.site-footer p{color:#b9cbe0;font-size:.92rem;max-width:420px}
.site-footer ul{list-style:none;margin:0;padding:0}
.site-footer li+li{margin-top:8px}
.site-footer a{color:#d8e4f1}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:34px;padding-top:20px;display:flex;justify-content:space-between;gap:15px;flex-wrap:wrap;font-size:.86rem;color:#a9bed5}

@media (max-width:1050px){
  .header-search{display:none}.primary-nav a{padding:9px 7px;font-size:.88rem}.hero-grid{grid-template-columns:1fr}.hero-card-wrap{display:none}.subject-grid,.resource-grid{grid-template-columns:repeat(2,1fr)}.posts-grid{grid-template-columns:repeat(2,1fr)}.single-layout{grid-template-columns:1fr}.sidebar{display:grid;grid-template-columns:1fr 1fr;gap:18px}.footer-grid{grid-template-columns:1.3fr 1fr 1fr}
}
@media (max-width:820px){
  .header-row{min-height:68px}.brand img{width:220px}.menu-toggle{display:block;margin-left:auto}.primary-nav{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--mhs-line);padding:12px 16px}.primary-nav.open{display:block}.primary-nav ul{display:block}.primary-nav a{padding:12px;border-radius:10px}.hero{padding:52px 0}.grade-grid{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .container{width:min(calc(100% - 24px),var(--mhs-max))}.brand{min-width:0}.brand img{width:205px}.hero h1{font-size:2.45rem}.hero-search{display:grid;grid-template-columns:1fr}.hero-search .btn{width:100%}.hero-stats{display:grid;gap:7px}.grade-grid,.subject-grid,.resource-grid,.posts-grid{grid-template-columns:1fr}.section{padding:52px 0}.section-head{display:block}.section-head .btn{margin-top:14px}.article{padding:24px 18px}.post-nav{grid-template-columns:1fr}.sidebar{display:block}.footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom span{display:block;margin-top:6px}
}


/* Static information pages */
.entry-content .lead{font-size:1.16rem;line-height:1.75;color:#41536a;margin-top:0}
.info-callout{margin:28px 0;padding:18px 20px;border:1px solid #cfe2f3;border-left:5px solid var(--mhs-blue);border-radius:14px;background:#f4faff}
.donation-card{display:grid;grid-template-columns:74px minmax(0,1fr);gap:20px;align-items:start;margin:28px 0;padding:26px;border:1px solid #f0dca4;border-radius:20px;background:linear-gradient(135deg,#fffaf0,#fff)}
.donation-card h2{margin-top:0}.donation-icon{width:64px;height:64px;display:grid;place-items:center;border-radius:18px;background:#fff0c5;color:#cc7e00;font-size:1.8rem}
.small-note{font-size:.91rem;color:var(--mhs-muted)}
.mhs-contact-form{margin:28px 0;padding:26px;border:1px solid var(--mhs-line);border-radius:20px;background:#f9fbfe}
.mhs-contact-form p{margin:0 0 18px}.mhs-contact-form label{display:block;margin-bottom:7px;font-weight:800;color:var(--mhs-navy)}
.mhs-contact-form input,.mhs-contact-form textarea{width:100%;border:1px solid #cfdbe8;border-radius:11px;background:#fff;padding:12px 14px;outline:none}
.mhs-contact-form input:focus,.mhs-contact-form textarea:focus{border-color:var(--mhs-blue);box-shadow:0 0 0 3px rgba(20,151,212,.12)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.form-notice{padding:13px 15px;border-radius:11px;margin:0 0 18px;font-weight:700}.form-notice.success{background:#eaf8f0;color:#17663f;border:1px solid #bce6ce}.form-notice.error{background:#fff2f0;color:#973e34;border:1px solid #efc2bc}.hp-field{position:absolute!important;left:-10000px!important;width:1px!important;height:1px!important;overflow:hidden!important}
@media (max-width:600px){.form-grid{grid-template-columns:1fr}.donation-card{grid-template-columns:1fr}.donation-icon{width:54px;height:54px}}


/* v1.2 architecture: class subjects, structured category chips and smart navigation */
.class-subject-directory{margin:0 0 38px;padding:28px;border:1px solid var(--mhs-line);border-radius:22px;background:linear-gradient(180deg,#f8fbff,#fff);box-shadow:var(--mhs-shadow)}
.class-subject-heading{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:24px}
.class-subject-heading h2{margin:6px 0 5px;color:var(--mhs-navy);font-size:clamp(1.5rem,3vw,2.05rem);letter-spacing:-.025em}.class-subject-heading p{margin:0;color:var(--mhs-muted)}
.subject-group+.subject-group{margin-top:28px}.subject-group h3{margin:0 0 13px;color:var(--mhs-navy);font-size:1rem;text-transform:uppercase;letter-spacing:.055em}
.class-subject-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}.class-subject-card{min-width:0;padding:16px;border:1px solid var(--mhs-line);border-radius:15px;background:#fff;display:grid;grid-template-columns:38px minmax(0,1fr);column-gap:10px;align-items:center;transition:.18s ease}.class-subject-card>span{grid-row:1/3;width:38px;height:38px;border-radius:11px;background:#eef7ff;display:grid;place-items:center;font-size:1.15rem}.class-subject-card strong{color:var(--mhs-ink);font-size:.94rem;line-height:1.25}.class-subject-card small{color:var(--mhs-muted);font-size:.75rem}.class-subject-card:hover{transform:translateY(-2px);text-decoration:none;border-color:#bfd9ee;box-shadow:0 10px 25px rgba(18,63,120,.08)}
.category-chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 18px}.category-chips a{display:inline-flex;padding:6px 10px;border-radius:999px;background:#edf6ff;border:1px solid #d4e8f8;color:var(--mhs-navy);font-size:.78rem;font-weight:800}.category-chips a:hover{text-decoration:none;background:#e3f2ff}
.smart-nav{margin-top:30px;padding-top:24px;border-top:1px solid var(--mhs-line)}.smart-nav-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.smart-nav-link{min-width:0;display:flex;flex-direction:column;gap:4px;border:1px solid var(--mhs-line);border-radius:14px;padding:14px 16px;background:#f9fbfe;color:var(--mhs-ink)}.smart-nav-link:hover{text-decoration:none;border-color:#bfd9ee;background:#f4f9ff}.smart-nav-link small{color:var(--mhs-blue-2);font-weight:850;text-transform:uppercase;letter-spacing:.04em;font-size:.72rem}.smart-nav-link small span{color:var(--mhs-muted);font-weight:700}.smart-nav-link strong{font-size:.9rem;line-height:1.35}.smart-nav-next{text-align:right;grid-column:2}.exam-pair-action{display:block;margin-top:14px;padding:14px 18px;text-align:center;border-radius:13px;background:linear-gradient(135deg,#fff5d7,#fff9e9);border:1px solid #efd38a;color:#7f5200;font-weight:900}.exam-pair-action:hover{text-decoration:none;background:#fff1c7}.exam-answer-nav .exam-pair-action{margin-top:0}
.filtered-class-note{margin:0 0 26px;padding:12px 15px;border-radius:12px;background:#eef7ff;color:var(--mhs-navy);font-weight:700;border:1px solid #d4e8f8}
@media (max-width:900px){.class-subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.class-subject-directory{padding:20px 16px}.class-subject-grid{grid-template-columns:1fr}.smart-nav-grid{grid-template-columns:1fr}.smart-nav-next{grid-column:1;text-align:left}}