:root{
	--bg:#0b0f14;
	--card:#0f1721;
	--accent:#00e5ff;
	--muted:#94a3b8;
	--glass: rgba(255,255,255,0.03);
	--glow: rgba(0,229,255,0.12);
}
*{box-sizing:border-box}
body{font-family:Inter,Segoe UI,Arial,sans-serif;background:var(--bg);margin:0;color:var(--muted);min-height:100vh}
.site-header{display:flex;align-items:center;justify-content:space-between;padding:10px 18px;background:linear-gradient(90deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));backdrop-filter: blur(6px);border-bottom:1px solid rgba(255,255,255,0.03);position:sticky;top:0;z-index:50}
body.viewer-open .site-header{display:none}
.status-left{font-family:'JetBrains Mono',ui-monospace,monospace;color:var(--accent);font-weight:700}
.status-right{font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",Arial;color:var(--muted);font-size:0.9rem}
.status-nav{display:flex;gap:12px}
.nav-link{padding:6px 10px;border-radius:6px;color:var(--muted);text-decoration:none;font-family:Inter}
.nav-link:hover{color:var(--accent);transform:translateY(-2px);box-shadow:0 6px 20px var(--glow);transition:all .22s ease}
.nav-link.active{color:var(--accent);box-shadow:inset 0 -2px 0 var(--accent);}

.page{max-width:1100px;margin:28px auto;padding:18px}
.card{background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));padding:22px;border-radius:8px;border:1px solid rgba(255,255,255,0.03);box-shadow:0 10px 30px rgba(2,6,23,0.5)}
h1,h2,h3{margin:0 0 12px;color:#e6f7ff}
.mono{font-family:'JetBrains Mono', ui-monospace, monospace;letter-spacing:0.6px}
.lead{color:var(--muted);font-size:1.05rem}

.intro-layout{display:grid;gap:24px;align-items:start}
.intro-profile{display:flex;flex-direction:column;align-items:center;gap:10px;text-align:center}
.profile-panel{padding:16px;background:linear-gradient(180deg, rgba(255,255,255,0.018), rgba(255,255,255,0.008));border:1px solid rgba(255,255,255,0.04);border-radius:10px;box-shadow:0 6px 20px rgba(2,6,23,0.28)}
.intro-photo{width:168px;height:168px;max-width:100%;object-fit:cover;border-radius:14px;border:1px solid rgba(0,229,255,0.18);box-shadow:0 10px 28px rgba(0,229,255,0.1)}
.intro-meta{margin:0;font-size:0.92rem;line-height:1.45;color:var(--muted)}
.intro-meta strong{color:#e6f7ff;font-weight:600}
.intro-content{display:flex;flex-direction:column;gap:18px;min-width:0}
.content-hero{padding-bottom:4px;border-bottom:1px solid rgba(255,255,255,0.05)}
.content-hero h1{font-size:clamp(1.15rem,2.4vw,1.55rem);line-height:1.35;margin-bottom:12px}
.content-hero .lead{margin:0;line-height:1.65}
.content-stack{display:flex;flex-direction:column;gap:14px}
.content-block{background:linear-gradient(180deg, rgba(255,255,255,0.016), rgba(255,255,255,0.008));border:1px solid rgba(255,255,255,0.04);border-left:3px solid rgba(0,229,255,0.42);border-radius:8px;padding:16px 18px;box-shadow:0 6px 18px rgba(2,6,23,0.22)}
.content-title{margin:0 0 10px;color:var(--accent);font-size:0.92rem;font-weight:700;letter-spacing:0.35px;line-height:1.4}
.content-block p{margin:0;line-height:1.65}
.content-block ul{margin:0;padding-left:1.2rem}
.content-block li{margin-bottom:8px;line-height:1.6}
.content-block li:last-child{margin-bottom:0}
.content-block li strong{color:#e6f7ff}
.page-heading{padding-bottom:12px;margin-bottom:4px;border-bottom:1px solid rgba(0,229,255,0.14)}
.summary-card .content-stack{margin-top:6px}

.upload-form{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:18px 0}
.form-row{display:flex;flex-direction:column}
.form-row label{font-size:0.85rem;color:var(--muted);margin-bottom:6px}
.form-row input[type=text], .form-row select, .form-row textarea{padding:10px;border:1px solid rgba(255,255,255,0.03);border-radius:6px;background:transparent;color:#e6f7ff}
.form-row textarea{resize:vertical}
.form-actions{grid-column:1/-1;display:flex;align-items:center;gap:12px}
.btn-primary{background:linear-gradient(90deg,var(--accent),#88f8ff);color:#001021;padding:10px 14px;border-radius:8px;border:none;cursor:pointer;box-shadow:0 8px 24px rgba(0,229,255,0.06)}
.muted{color:var(--muted)}

.assignments{display:grid;grid-template-columns:1fr;gap:18px;margin-top:16px}
.assignment-group{background:transparent;padding:12px;border-radius:6px}
.assignment-list{display:flex;flex-direction:column;gap:12px;margin-top:8px}
.assignment-card{background:linear-gradient(180deg, rgba(255,255,255,0.015), rgba(255,255,255,0.01));padding:14px;border-radius:6px;border:1px solid rgba(255,255,255,0.03);display:flex;flex-direction:column;gap:8px}
.assignment-card.terminal{font-family:'JetBrains Mono',monospace;background:linear-gradient(180deg, rgba(0,0,0,0.4), rgba(255,255,255,0.02));border:1px solid rgba(0,255,200,0.06);box-shadow:0 6px 18px rgba(0,255,200,0.02)}
.assignment-card h4{margin:0;color:var(--accent);font-family:'JetBrains Mono'}
.assignment-card p{margin:0;color:var(--muted);font-size:0.95rem}
.assignment-actions{display:flex;gap:10px;margin-top:8px}
.btn-view{background:transparent;color:var(--accent);border:1px solid rgba(0,229,255,0.12);padding:8px 10px;border-radius:6px;cursor:pointer}
.btn-view:hover{transform:translateY(-3px);box-shadow:0 10px 30px var(--glow)}

.site-footer{padding:24px;text-align:center;color:var(--muted)}

.hidden{display:none}

/* viewer */
.viewer{position:fixed;inset:0;padding:20px;z-index:100;display:none}
.viewer[data-open="true"]{display:flex;align-items:center;justify-content:center;background:linear-gradient(90deg, rgba(0,0,0,0.6), rgba(0,0,0,0.7));}
.viewer-inner{width:min(1100px,95vw);height:min(88vh,900px);background:#071019;border-radius:12px;overflow:hidden;position:relative;display:flex;flex-direction:column}
.pdf-toolbar{height:52px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 12px;border-bottom:1px solid rgba(255,255,255,0.04);background:linear-gradient(90deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01))}
.toolbar-group{display:flex;align-items:center;gap:10px}
.toolbar-left{justify-self:start}
.toolbar-center{justify-self:center}
.toolbar-right{justify-self:end}
.pdf-scroll-container{flex:1;overflow:auto;background:#071019;padding:14px}
.pdf-canvas-wrap{min-width:100%;min-height:100%;display:flex;align-items:flex-start;justify-content:center}
#pdfCanvas{display:block;background:#0b131b;border:0;outline:0;box-shadow:none;border-radius:10px}
.pdf-status{margin:0;padding:24px;text-align:center;max-width:520px}
.pager-btn{min-width:36px;height:32px;border-radius:6px;background:transparent;border:1px solid rgba(0,229,255,0.16);color:var(--accent);cursor:pointer;font-family:'JetBrains Mono',ui-monospace,monospace}
.pager-btn:hover{box-shadow:0 8px 20px var(--glow);transform:translateY(-1px)}
.pager-btn:disabled{opacity:0.35;cursor:not-allowed;box-shadow:none;transform:none}
.pager-counter{font-family:'JetBrains Mono',ui-monospace,monospace;color:var(--muted);min-width:84px;text-align:center}
.viewer .close{position:static;background:transparent;color:var(--accent);border-radius:6px;padding:4px 10px;border:1px solid rgba(0,255,200,0.12);font-size:18px;z-index:2;line-height:1;cursor:pointer}

/* sleek dark custom scrollbars for zoomed canvas navigation */
.pdf-scroll-container::-webkit-scrollbar{width:10px;height:10px}
.pdf-scroll-container::-webkit-scrollbar-track{background:rgba(255,255,255,0.03);border-radius:999px}
.pdf-scroll-container::-webkit-scrollbar-thumb{background:linear-gradient(180deg, rgba(0,229,255,0.35), rgba(0,229,255,0.2));border-radius:999px;border:2px solid rgba(7,16,25,0.9)}
.pdf-scroll-container::-webkit-scrollbar-thumb:hover{background:linear-gradient(180deg, rgba(0,229,255,0.5), rgba(0,229,255,0.3))}
.pdf-scroll-container{scrollbar-color: rgba(0,229,255,0.35) rgba(255,255,255,0.03);scrollbar-width:thin}

@media(min-width:720px){
	.intro-layout{grid-template-columns:minmax(220px,max-content) 1fr;gap:28px;align-items:flex-start}
	.intro-profile{align-items:flex-start;text-align:left;padding-top:4px;width:max-content;max-width:100%}
	.profile-panel{width:max-content;max-width:100%}
	.intro-meta{white-space:nowrap}
	.intro-photo{width:188px;height:188px}
}

@media(min-width:900px){
	.assignments{grid-template-columns:repeat(2,1fr)}
	.upload-form{grid-template-columns:repeat(2,1fr)}
}