:root{--navy:#123a72;--navy2:#0b2851;--blue:#245b9e;--orange:#ef8f32;--orange2:#ffad55;--ink:#142033;--muted:#5f6f82;--line:#dce4ee;--soft:#f5f8fc;--white:#fff;--success:#1b7d56;--danger:#a63b39;--shadow:0 18px 50px rgba(18,58,114,.10);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.6}a{color:inherit;text-decoration:none}button,input,select{font:inherit}.container{width:min(1180px,calc(100% - 32px));margin:auto}.skip-link{position:absolute;left:-999px;top:8px;background:#fff;padding:10px 14px;z-index:99}.skip-link:focus{left:8px}.topbar{background:var(--navy2);color:#dbe8f8;font-size:13px}.topbar .container{display:flex;justify-content:space-between;gap:16px;padding:7px 0}.site-header{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid rgba(220,228,238,.8);z-index:50}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-weight:850;color:var(--navy);letter-spacing:-.3px}.brand img{width:40px;height:40px}.brand small{display:block;color:var(--muted);font-size:11px;font-weight:650;letter-spacing:.2px}.nav-links{display:flex;align-items:center;gap:5px}.nav-links a{padding:10px 12px;border-radius:10px;color:#29415f;font-weight:700;font-size:14px}.nav-links a:hover,.nav-links a.active{background:#edf4fd;color:var(--navy)}.nav-cta{background:var(--orange)!important;color:#1f1b16!important}.menu-btn{display:none;background:none;border:0;font-size:26px;color:var(--navy)}
.hero{background:radial-gradient(circle at 90% 10%,rgba(239,143,50,.24),transparent 28%),linear-gradient(135deg,#0c2d5b,#174a88 65%,#1f65aa);color:#fff;padding:74px 0 66px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:50px}.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:7px 12px;border-radius:99px;font-size:13px;font-weight:750}.hero h1{font-size:clamp(38px,6vw,66px);line-height:1.04;margin:20px 0 18px;letter-spacing:-2.6px}.hero p{font-size:18px;color:#dfeafb;max-width:690px}.search-box{display:flex;background:#fff;border-radius:14px;padding:7px;margin-top:28px;box-shadow:0 24px 60px rgba(0,0,0,.22)}.search-box input{border:0;outline:0;flex:1;min-width:0;padding:13px 14px;color:var(--ink)}.search-box button{border:0;background:var(--orange);color:#272019;font-weight:850;padding:12px 20px;border-radius:10px;cursor:pointer}.hero-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.hero-links a{font-size:13px;border-bottom:1px dashed rgba(255,255,255,.5);color:#fff}.hero-panel{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);border-radius:26px;padding:24px;box-shadow:0 30px 80px rgba(0,0,0,.18);transform:rotate(1deg)}.folder{background:#fff;color:var(--ink);border-radius:18px;padding:18px;margin:12px 0;display:flex;justify-content:space-between;align-items:center;box-shadow:0 14px 32px rgba(9,39,81,.18)}.folder strong{display:block;color:var(--navy)}.folder span{font-size:13px;color:var(--muted)}.folder b{width:46px;height:46px;display:grid;place-items:center;background:#fff2e4;border-radius:12px;font-size:24px}
.section{padding:76px 0}.section.soft{background:var(--soft)}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}.section-head h2{font-size:clamp(28px,4vw,42px);letter-spacing:-1.2px;line-height:1.15;margin:0}.section-head p{color:var(--muted);max-width:620px;margin:8px 0 0}.text-link{color:var(--blue);font-weight:800}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.category-card{position:relative;overflow:hidden;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:.2s}.category-card:hover{transform:translateY(-3px);border-color:#b9cce5}.category-card .icon{width:54px;height:54px;border-radius:15px;display:grid;place-items:center;font-size:28px;background:#edf4fd}.category-card.orange .icon{background:#fff1e3}.category-card h3{font-size:25px;margin:18px 0 8px}.category-card p{color:var(--muted)}.card-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid var(--navy);border-radius:11px;padding:11px 15px;color:var(--navy);font-weight:800;background:#fff;cursor:pointer}.btn.primary{background:var(--navy);color:#fff}.btn.orange{background:var(--orange);border-color:var(--orange);color:#221b15}.btn.small{padding:8px 11px;font-size:13px}.btn.disabled{opacity:.55;cursor:not-allowed}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:-32px;position:relative;z-index:5}.stat{background:#fff;border:1px solid var(--line);border-radius:15px;padding:20px;text-align:center;box-shadow:var(--shadow)}.stat strong{display:block;font-size:28px;color:var(--navy)}.stat span{font-size:13px;color:var(--muted)}
.subject-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:13px}.subject-link{background:#fff;border:1px solid var(--line);border-radius:13px;padding:15px 16px;display:flex;align-items:center;gap:11px;font-weight:750;transition:.2s}.subject-link:hover{border-color:#9db8d9;box-shadow:0 8px 24px rgba(18,58,114,.09)}.subject-link i{font-style:normal;width:36px;height:36px;display:grid;place-items:center;background:#edf4fd;border-radius:10px;color:var(--navy);font-size:13px}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.step{padding:24px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.step span{width:38px;height:38px;display:grid;place-items:center;background:var(--navy);color:#fff;border-radius:50%;font-weight:900}.step h3{margin:16px 0 7px}.step p{margin:0;color:var(--muted)}.faq{max-width:900px;margin:auto}.faq details{border:1px solid var(--line);border-radius:14px;padding:17px 20px;background:#fff;margin:10px 0}.faq summary{font-weight:800;cursor:pointer}.faq p{color:var(--muted)}
.page-hero{background:linear-gradient(135deg,#0d2f60,#1e5d9f);color:#fff;padding:50px 0}.breadcrumb{font-size:13px;color:#d8e6f8;margin-bottom:14px}.breadcrumb a{text-decoration:underline;text-underline-offset:3px}.page-hero h1{font-size:clamp(34px,5vw,52px);line-height:1.08;letter-spacing:-1.7px;margin:0 0 12px}.page-hero p{color:#e0ecfa;max-width:780px}.content-layout{display:grid;grid-template-columns:280px 1fr;gap:24px;align-items:start}.filter-panel{position:sticky;top:94px;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}.filter-panel h2{font-size:19px;margin:0 0 14px}.field{margin:13px 0}.field label{display:block;font-size:13px;font-weight:800;margin-bottom:5px}.field select,.field input{width:100%;border:1px solid #cbd7e6;border-radius:10px;padding:11px;background:#fff}.results-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:15px}.results-bar strong{color:var(--navy)}.papers-list{display:grid;gap:12px}.paper-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}.paper-card h3{font-size:17px;margin:0 0 4px}.paper-meta{display:flex;flex-wrap:wrap;gap:7px;font-size:12px;color:var(--muted)}.tag{background:#edf4fd;color:var(--navy);padding:4px 8px;border-radius:99px;font-weight:750}.tag.orange{background:#fff0df;color:#8b4b0e}.paper-buttons{display:flex;gap:8px}.empty{padding:44px;text-align:center;border:1px dashed #bccbdd;border-radius:16px;background:#fbfdff;color:var(--muted)}.notice{background:#fff7ed;border:1px solid #ffd4a3;color:#764312;border-radius:12px;padding:13px 15px;margin-bottom:18px}.seo-copy{margin-top:38px;background:#fff;border:1px solid var(--line);padding:24px;border-radius:16px}.seo-copy h2{color:var(--navy)}.seo-copy h3{margin-top:24px}.seo-copy p,.seo-copy li{color:#526276}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}.simple-table{width:100%;border-collapse:collapse;background:#fff}.simple-table th,.simple-table td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--line)}.simple-table th{background:#edf4fd;color:var(--navy)}
.toast{position:fixed;right:20px;bottom:20px;background:#142033;color:#fff;border-radius:12px;padding:13px 16px;box-shadow:0 15px 40px rgba(0,0,0,.25);z-index:90;max-width:360px;transform:translateY(100px);opacity:0;transition:.25s}.toast.show{transform:none;opacity:1}.footer{background:#0a2347;color:#ccdaed;padding:58px 0 20px}.footer-grid{display:grid;grid-template-columns:1.25fr repeat(3,1fr);gap:34px}.footer h3,.footer h4{color:#fff}.footer a{display:block;margin:8px 0;color:#ccdaed}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:35px;padding-top:18px;font-size:13px;display:flex;justify-content:space-between;gap:20px}.mobile-filter{display:none;margin-bottom:14px}.load-more-wrap{text-align:center;margin-top:18px}.load-more-wrap[hidden]{display:none}
@media(max-width:900px){.nav-links{display:none;position:absolute;left:16px;right:16px;top:70px;background:#fff;border:1px solid var(--line);border-radius:15px;box-shadow:var(--shadow);padding:12px;flex-direction:column;align-items:stretch}.nav-links.open{display:flex}.menu-btn{display:block}.hero-grid,.content-layout{grid-template-columns:1fr}.hero-panel{display:none}.stats{grid-template-columns:repeat(2,1fr)}.subject-grid{grid-template-columns:repeat(2,1fr)}.filter-panel{position:static;display:none}.filter-panel.open{display:block}.mobile-filter{display:inline-flex}.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.topbar{display:none}.nav{height:64px}.brand small{display:none}.hero{padding:52px 0}.hero h1{font-size:42px;letter-spacing:-1.8px}.search-box{display:block;padding:8px}.search-box button{width:100%}.stats{margin-top:18px}.grid-2,.steps,.subject-grid,.footer-grid{grid-template-columns:1fr}.section{padding:54px 0}.section-head{display:block}.paper-card{grid-template-columns:1fr}.paper-buttons{flex-wrap:wrap}.paper-buttons .btn{flex:1}.footer-bottom{display:block}.content-layout{display:block}}

/* PHP build additions */
.filter-actions,.collection-switch,.pagination{display:flex;gap:10px;flex-wrap:wrap;align-items:center}.filter-actions .btn{flex:1}.pagination{justify-content:center;margin-top:24px}.pagination span{font-weight:800;color:var(--navy)}.subject-directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.subject-directory-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:17px;display:flex;justify-content:space-between;gap:15px;align-items:center}.subject-directory-card h3{margin:0 0 4px;font-size:17px}.subject-directory-card p{margin:0;color:var(--muted);font-size:13px}.collection-switch{margin-bottom:18px}.narrow{max-width:850px}.prose h2{color:var(--navy);margin-top:28px}.prose p,.prose li{color:#526276;line-height:1.8}.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:40px;align-items:start}.contact-form{background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px}.contact-form textarea{width:100%;border:1px solid #cbd7e6;border-radius:10px;padding:11px;resize:vertical;font:inherit}.form-message{border-radius:10px;padding:12px 14px;margin-bottom:15px}.form-message.success{background:#ecfdf3;color:#17663a;border:1px solid #b7edcd}.form-message.error{background:#fff1f1;color:#8f2424;border:1px solid #ffcaca}.honeypot{position:absolute!important;left:-9999px!important}.results-bar span{color:var(--muted);font-size:13px}
@media(max-width:760px){.subject-directory{grid-template-columns:1fr}.subject-directory-card{display:block}.subject-directory-card .card-actions{margin-top:12px}.contact-grid{grid-template-columns:1fr}}

/* Clean category → class → subject hierarchy */
.inline-class-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}.inline-class-links a{display:inline-flex;padding:7px 11px;border-radius:999px;background:#edf4fd;color:var(--navy);font-size:13px;font-weight:800}.orange-links a{background:#fff0df;color:#8b4b0e}.directory-search{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;margin-bottom:24px}.directory-search label{display:block;font-weight:850;margin-bottom:8px}.directory-search>div{display:flex;gap:10px}.directory-search input{flex:1;min-width:0;border:1px solid #cbd7e6;border-radius:11px;padding:12px 14px}.class-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.class-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:25px;box-shadow:var(--shadow)}.class-card .class-number{display:inline-flex;background:#edf4fd;color:var(--navy);font-weight:900;border-radius:999px;padding:6px 11px}.class-card h2{margin:16px 0 7px;font-size:25px}.class-card p{color:var(--muted);margin:0 0 20px}.subject-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.subject-card{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:15px;padding:16px;transition:.2s}.subject-card:hover{border-color:#9db8d9;transform:translateY(-2px);box-shadow:0 10px 28px rgba(18,58,114,.09)}.subject-card-icon{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:#edf4fd;color:var(--navy);font-weight:950}.subject-card h3{margin:0 0 4px;font-size:17px}.subject-card p{margin:0;color:var(--muted);font-size:13px}.subject-card>span{font-size:22px;color:var(--blue)}.collection-summary{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px;margin-bottom:34px}.collection-summary>div{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center}.collection-summary strong{display:block;color:var(--navy);font-size:26px}.collection-summary span{color:var(--muted);font-size:13px}.subject-page-nav{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;margin-bottom:18px}.subject-summary{margin-bottom:20px}.year-jump{display:flex;align-items:center;flex-wrap:wrap;gap:8px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin-bottom:24px}.year-jump strong{color:var(--navy)}.year-jump a{padding:5px 9px;border-radius:999px;background:#edf4fd;color:var(--navy);font-size:13px;font-weight:800}.year-groups{display:grid;gap:22px}.year-section{scroll-margin-top:100px}.year-heading{display:flex;align-items:end;justify-content:space-between;gap:16px;margin-bottom:12px}.year-heading span{display:block;color:var(--muted);font-size:13px;font-weight:750}.year-heading h2{margin:2px 0 0;font-size:27px;color:var(--navy)}.year-heading>strong{font-size:13px;background:#fff0df;color:#8b4b0e;border-radius:999px;padding:6px 10px}.collection-seo{margin-top:0}.compact-subject-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.paper-card small{font-size:13px;color:var(--muted);font-weight:700}
@media(max-width:900px){.class-grid,.subject-card-grid{grid-template-columns:1fr}.compact-subject-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:600px){.directory-search>div{display:grid}.directory-search .btn{width:100%}.collection-summary{grid-template-columns:1fr}.subject-card{grid-template-columns:auto 1fr}.subject-card>span{display:none}.year-heading{display:block}.year-heading>strong{display:inline-flex;margin-top:8px}.compact-subject-grid{grid-template-columns:1fr}}