:root{
  --navy:#07162d;--navy-2:#0b2345;--blue:#1d4ed8;--blue-soft:#eff6ff;
  --gold:#d6a11d;--gold-soft:#fff8df;--text:#111827;--muted:#5b6472;
  --line:#dfe5ee;--surface:#fff;--soft:#f5f7fb;--green:#087f5b;
  --shadow:0 16px 45px rgba(7,22,45,.10);--shadow-sm:0 8px 24px rgba(7,22,45,.07);
  --radius:20px;--container:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.65;overflow-x:hidden}
a{color:inherit;text-decoration:none}button,input,select{font:inherit}button{cursor:pointer}img{display:block;max-width:100%}
.container{width:min(var(--container),calc(100% - 32px));margin-inline:auto}
.skip-link{position:absolute;left:-9999px;top:10px;background:#fff;color:#000;padding:10px 14px;z-index:9999}.skip-link:focus{left:10px}
.topbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.nav{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{display:flex;align-items:center;gap:12px;min-width:0}.brand img{width:46px;height:46px;object-fit:cover;border-radius:14px;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.brand-mark{width:46px;height:46px;border-radius:14px;background:linear-gradient(145deg,var(--navy),#173a70);color:#fff;display:grid;place-items:center;font-weight:900;box-shadow:var(--shadow-sm)}
.brand-text strong{display:block;font-size:1.02rem;line-height:1.1;color:var(--navy)}.brand-text span{display:block;color:var(--muted);font-size:.79rem;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:5px;list-style:none}.nav-links a{display:inline-flex;padding:10px 12px;border-radius:999px;color:#334155;font-weight:800;font-size:.91rem}.nav-links a:hover,.nav-links a.active{background:var(--navy);color:#fff}
.menu-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:12px;padding:9px 12px;font-weight:900;color:var(--navy)}
.hero{position:relative;overflow:hidden;background:linear-gradient(125deg,var(--navy),var(--navy-2) 65%,#123768);color:#fff;padding:64px 0 56px}
.hero:before,.hero:after{content:"";position:absolute;border-radius:50%;pointer-events:none}.hero:before{width:420px;height:420px;right:-150px;top:-220px;background:rgba(214,161,29,.18)}.hero:after{width:250px;height:250px;left:-100px;bottom:-150px;background:rgba(29,78,216,.25)}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.35fr .65fr;gap:28px;align-items:center}.eyebrow{display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.09);padding:8px 12px;border-radius:999px;font-weight:900;font-size:.85rem;margin-bottom:16px}.eyebrow:before{content:"";width:8px;height:8px;border-radius:50%;background:var(--gold)}
.hero h1{font-size:clamp(2.15rem,5vw,4.4rem);line-height:1.03;letter-spacing:-.055em;max-width:900px}.hero p{color:#dbe7f7;font-size:clamp(1rem,2vw,1.16rem);max-width:780px;margin-top:18px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{border:0;min-height:46px;border-radius:14px;padding:11px 16px;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:900;transition:.2s ease}.btn:hover{transform:translateY(-2px)}.btn-gold{background:var(--gold);color:#15100a;box-shadow:0 12px 28px rgba(214,161,29,.28)}.btn-light{background:#fff;color:var(--navy);border:1px solid rgba(255,255,255,.4)}.btn-navy{background:var(--navy);color:#fff}.btn-outline{background:#fff;border:1px solid var(--line);color:var(--navy)}.btn-blue{background:var(--blue);color:#fff}.btn-download{background:#edfdf6;color:#086b4e;border:1px solid #b7eed9}
.hero-panel{background:rgba(255,255,255,.10);border:1px solid rgba(255,255,255,.18);border-radius:24px;padding:22px;backdrop-filter:blur(10px)}.hero-panel h2{font-size:1.1rem;margin-bottom:14px}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.stat{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.13);border-radius:16px;padding:14px}.stat strong{display:block;font-size:1.55rem;line-height:1.1}.stat span{font-size:.82rem;color:#dbe7f7;font-weight:700}
main{padding:38px 0 72px}.breadcrumbs{display:flex;flex-wrap:wrap;gap:7px;align-items:center;color:#6b7280;font-size:.9rem;margin-bottom:22px}.breadcrumbs a{color:var(--blue);font-weight:850}.breadcrumbs .current{color:var(--navy);font-weight:900}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:18px}.section-head h2{font-size:clamp(1.55rem,3vw,2.45rem);line-height:1.1;letter-spacing:-.04em;color:var(--navy)}.section-head p{color:var(--muted);max-width:760px;margin-top:8px}
.steps{display:grid;gap:22px}.step-card{border:1px solid var(--line);background:#fff;border-radius:24px;padding:22px;box-shadow:var(--shadow-sm)}.step-heading{display:flex;align-items:center;gap:12px;margin-bottom:16px}.step-number{width:38px;height:38px;border-radius:12px;background:var(--navy);color:#fff;display:grid;place-items:center;font-weight:900}.step-heading h2{font-size:1.3rem;color:var(--navy);letter-spacing:-.02em}.step-heading p{color:var(--muted);font-size:.92rem}
.year-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.year-card{position:relative;overflow:hidden;border:1px solid var(--line);background:linear-gradient(145deg,#fff,#f8fafc);border-radius:20px;padding:20px;text-align:left;transition:.2s ease}.year-card:hover,.year-card.active{transform:translateY(-3px);border-color:var(--gold);box-shadow:var(--shadow)}.year-card.active:after{content:"Selected";position:absolute;right:12px;top:12px;border-radius:999px;background:var(--gold);color:#1c1608;padding:4px 8px;font-size:.72rem;font-weight:900}.year-card strong{display:block;color:var(--navy);font-size:1.65rem;line-height:1.15}.year-card span{display:block;color:var(--muted);font-weight:750;margin-top:5px}.year-card small{display:block;color:var(--blue);font-weight:900;margin-top:12px}
.semester-grid{display:grid;grid-template-columns:repeat(8,1fr);gap:9px}.sem-btn{border:1px solid var(--line);background:#fff;border-radius:14px;padding:12px 8px;font-weight:900;color:var(--navy);transition:.18s ease}.sem-btn:hover,.sem-btn.active{background:var(--navy);color:#fff;border-color:var(--navy);transform:translateY(-2px)}.sem-btn small{display:block;font-weight:700;font-size:.72rem;opacity:.75}
.filter-bar{display:grid;grid-template-columns:1.2fr .8fr auto;gap:12px;align-items:end}.field label{display:block;color:#475569;font-size:.82rem;font-weight:900;text-transform:uppercase;letter-spacing:.04em;margin-bottom:7px}.input,.select{width:100%;min-height:48px;border:1px solid var(--line);background:#fff;border-radius:14px;padding:11px 13px;color:var(--text);outline:none}.input:focus,.select:focus{border-color:var(--blue);box-shadow:0 0 0 4px rgba(29,78,216,.11)}
.branch-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.chip{border:1px solid var(--line);background:#fff;color:#334155;border-radius:999px;padding:8px 11px;font-size:.83rem;font-weight:900}.chip:hover,.chip.active{background:var(--navy);color:#fff;border-color:var(--navy)}
.results-head{display:flex;justify-content:space-between;align-items:center;gap:14px;margin:20px 0 14px}.results-head strong{color:var(--navy);font-size:1.05rem}.results-head span{color:var(--muted);font-size:.9rem}.paper-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.paper-card{display:flex;flex-direction:column;border:1px solid var(--line);background:#fff;border-radius:20px;overflow:hidden;box-shadow:var(--shadow-sm);transition:.2s ease;min-width:0}.paper-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#c8d3e2}.paper-top{height:7px;background:linear-gradient(90deg,var(--navy),var(--blue),var(--gold))}.paper-body{padding:18px;display:flex;flex-direction:column;flex:1}.badges{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}.badge{display:inline-flex;align-items:center;border-radius:999px;padding:5px 8px;font-size:.72rem;font-weight:900;background:var(--blue-soft);color:#1e40af;border:1px solid #bfd5ff}.badge.gold{background:var(--gold-soft);color:#875d00;border-color:#f1d782}.badge.green{background:#effcf6;color:#087052;border-color:#bcebd9}.badge.gray{background:#f3f4f6;color:#4b5563;border-color:#e1e4e8}.paper-code{color:var(--blue);font-size:.82rem;font-weight:950;letter-spacing:.04em}.paper-card h3{color:var(--navy);font-size:1.12rem;line-height:1.3;letter-spacing:-.02em;margin:6px 0 8px}.paper-meta{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:auto;padding-top:13px}.meta-item{border:1px solid var(--line);background:var(--soft);border-radius:12px;padding:9px}.meta-item small{display:block;color:#7a8492;font-size:.7rem;font-weight:800;text-transform:uppercase}.meta-item strong{display:block;color:#273449;font-size:.83rem;margin-top:2px}.paper-actions{display:grid;grid-template-columns:1fr 1fr;gap:9px;padding:0 18px 18px}.paper-actions .btn{font-size:.86rem;padding:10px 11px;min-height:42px}
.empty{border:1px dashed #bcc7d6;background:#f8fafc;border-radius:20px;padding:32px;text-align:center;color:var(--muted)}.empty strong{display:block;color:var(--navy);font-size:1.1rem;margin-bottom:6px}
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:34px}.info-card{border:1px solid var(--line);background:#fff;border-radius:20px;padding:20px;box-shadow:var(--shadow-sm)}.info-card .icon{width:44px;height:44px;border-radius:14px;background:var(--gold-soft);color:#835c00;display:grid;place-items:center;font-weight:900;margin-bottom:13px}.info-card h3{color:var(--navy);margin-bottom:7px}.info-card p{color:var(--muted)}
.seo-copy{margin-top:34px;border:1px solid var(--line);background:linear-gradient(145deg,#fff,#f8fafc);border-radius:24px;padding:24px}.seo-copy h2,.seo-copy h3{color:var(--navy);letter-spacing:-.03em}.seo-copy h2{margin-bottom:10px}.seo-copy h3{margin:22px 0 8px}.seo-copy p,.seo-copy li{color:#4b5563}.seo-copy ul{padding-left:20px}.semester-links{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:14px}.semester-links a{border:1px solid var(--line);border-radius:14px;padding:11px;background:#fff;color:var(--blue);font-weight:850}.semester-links a:hover{border-color:var(--blue);background:var(--blue-soft)}
.faq{margin-top:34px}.faq-list{display:grid;gap:10px}.faq-item{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff}.faq-q{width:100%;border:0;background:#fff;color:var(--navy);padding:16px;display:flex;justify-content:space-between;gap:12px;text-align:left;font-weight:900}.faq-a{display:none;padding:0 16px 16px;color:var(--muted)}.faq-item.open .faq-a{display:block}
.footer{background:var(--navy);color:#cbd5e1;padding:40px 0}.footer-grid{display:grid;grid-template-columns:1.25fr .75fr .75fr;gap:24px}.footer h2,.footer h3{color:#fff;margin-bottom:10px}.footer ul{list-style:none;display:grid;gap:8px}.footer a:hover{color:var(--gold)}.copyright{margin-top:25px;padding-top:18px;border-top:1px solid rgba(255,255,255,.13);font-size:.9rem}
.hidden{display:none!important}
/* Detail pages */
.detail-hero{background:linear-gradient(125deg,var(--navy),#123768);color:#fff;padding:42px 0}.detail-hero h1{font-size:clamp(2rem,4.5vw,3.6rem);line-height:1.08;letter-spacing:-.045em}.detail-hero p{color:#dbe7f7;margin-top:12px;max-width:850px}.detail-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:20px;align-items:start}.detail-card,.sidebar-card{border:1px solid var(--line);background:#fff;border-radius:22px;padding:20px;box-shadow:var(--shadow-sm)}.sidebar-card{position:sticky;top:92px}.detail-meta{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:16px 0}.detail-meta .meta-item{padding:11px}.viewer{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#eef2f7}.viewer iframe{width:100%;height:72vh;min-height:600px;border:0;display:block}.action-stack{display:grid;gap:10px;margin-top:14px}.related-list{display:grid;gap:9px;margin-top:12px}.related-link{display:block;border:1px solid var(--line);border-radius:13px;padding:11px;background:#fff}.related-link:hover{border-color:var(--blue);background:var(--blue-soft)}.related-link strong{display:block;color:var(--navy);font-size:.9rem}.related-link span{display:block;color:var(--muted);font-size:.78rem;margin-top:3px}.notice{border-left:4px solid var(--gold);background:var(--gold-soft);border-radius:12px;padding:13px 14px;color:#5f4708;margin:16px 0}
.index-toolbar{display:grid;grid-template-columns:1fr 260px;gap:12px;margin:18px 0}
@media(max-width:1050px){.paper-grid{grid-template-columns:repeat(2,1fr)}.semester-grid{grid-template-columns:repeat(4,1fr)}.hero-grid,.detail-layout,.footer-grid{grid-template-columns:1fr}.hero-panel{max-width:620px}.sidebar-card{position:static}.viewer iframe{height:65vh}.info-grid{grid-template-columns:1fr 1fr}}
@media(max-width:820px){.menu-btn{display:inline-flex}.nav-links{position:fixed;display:none;inset:73px 16px auto 16px;flex-direction:column;align-items:stretch;background:#fff;border:1px solid var(--line);border-radius:18px;padding:11px;box-shadow:var(--shadow)}.nav-links.open{display:flex}.nav-links a{justify-content:flex-start;border-radius:11px}.hero{padding:48px 0}.year-grid,.paper-grid,.info-grid{grid-template-columns:1fr}.filter-bar,.index-toolbar{grid-template-columns:1fr}.semester-links{grid-template-columns:repeat(2,1fr)}.detail-meta{grid-template-columns:1fr 1fr}.viewer iframe{min-height:520px}}
@media(max-width:540px){.container{width:min(var(--container),calc(100% - 22px))}.nav{min-height:66px}.brand img,.brand-mark{width:40px;height:40px;border-radius:12px}.brand-text span{max-width:180px;overflow:hidden;text-overflow:ellipsis}.hero h1{font-size:2.25rem}.hero-actions{display:grid}.hero-actions .btn{width:100%}.stats{grid-template-columns:1fr 1fr}.step-card{padding:16px;border-radius:18px}.semester-grid{grid-template-columns:repeat(2,1fr)}.paper-actions{grid-template-columns:1fr}.semester-links{grid-template-columns:1fr}.detail-meta{grid-template-columns:1fr 1fr}.viewer iframe{height:62vh;min-height:430px}.section-head{align-items:start;flex-direction:column}}
@media print{.topbar,.hero,.detail-hero,.footer,.paper-actions,.hero-actions,.menu-btn,.sidebar-card{display:none!important}main{padding:0}.container{width:100%}.paper-card,.detail-card{box-shadow:none;break-inside:avoid}}