:root{--bg:#f5f7fb;--card:#fff;--text:#172033;--muted:#6c7890;--primary:#3156d9;--primary-dark:#2444b8;--border:#e5e9f2;--danger:#c83445;--ok:#15805c;--shadow:0 10px 28px rgba(28,45,85,.08)}[data-theme=dark]{--bg:#111827;--card:#1d2738;--text:#edf2fa;--muted:#aeb9cb;--border:#324057;--primary:#7c95ff;--primary-dark:#97aaff;--shadow:none}*{box-sizing:border-box}html,body{max-width:100%;overflow-x:hidden}body{margin:0;font:15px/1.55 system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--text)}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.topbar{min-height:66px;display:flex;align-items:center;gap:20px;padding:10px clamp(16px,4vw,48px);background:var(--card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:30}.brand{color:var(--text);font-weight:800;display:flex;gap:9px;align-items:center}.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:10px;background:var(--primary);color:#fff;font-size:11px}.nav{display:flex;align-items:center;gap:14px;margin-left:auto;font-size:14px}.profile-link{display:flex;align-items:center;gap:6px}.avatar-sm{width:28px;height:28px;border-radius:50%;object-fit:cover}.nav-badge{background:var(--danger);color:#fff;border-radius:999px;padding:1px 6px;font-size:10px;margin-left:4px}.menu-toggle,.theme-toggle{border:0;background:transparent;color:var(--text);cursor:pointer}.menu-toggle{display:none;margin-left:auto}.menu-toggle i{display:block;width:23px;height:2px;background:currentColor;margin:5px;transition:.2s}.wrap{max-width:1180px;margin:28px auto;padding:0 18px}.card{background:var(--card);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:16px;padding:22px;margin-bottom:18px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:16px}h1,h2,h3{line-height:1.2;margin-top:0}h1{font-size:clamp(1.55rem,3vw,2.2rem)}label{display:block;margin:12px 0 5px;font-size:13px;font-weight:700}input,select,textarea{width:100%;padding:11px 12px;background:transparent;color:var(--text);border:1px solid var(--border);border-radius:9px;font:inherit}button,.btn{background:var(--primary);color:#fff;border:0;padding:10px 16px;border-radius:9px;cursor:pointer;font:inherit;display:inline-block;margin-top:12px}.btn:hover,button:hover{background:var(--primary-dark);text-decoration:none}.btn-block{width:100%}.btn-danger{background:var(--danger)}table{width:100%;border-collapse:collapse;font-size:14px}th,td{text-align:left;padding:11px 9px;border-bottom:1px solid var(--border);vertical-align:top}.flash{padding:12px 15px;border-radius:10px;margin-bottom:16px}.flash-success{background:#dff6eb;color:#096846}.flash-error{background:#fde8eb;color:#a32134}.footer{text-align:center;color:var(--muted);padding:25px;font-size:13px}.badge{display:inline-block;padding:3px 9px;border-radius:99px;background:#e8edff;color:#294bbf;font-size:12px}.muted{color:var(--muted)}.stat-card h3{font-size:2rem;margin-bottom:2px}.auth-page{background:linear-gradient(135deg,#eef2ff,#f8fafc)}.auth-shell{max-width:430px;margin:9vh auto;padding:18px}.auth-card{padding:30px}.table-wrap{overflow-x:auto}.announcement{border-left:4px solid var(--primary)}
@media(max-width:800px){.menu-toggle{display:block}.nav{display:none;position:absolute;top:66px;left:0;right:0;padding:16px 20px;background:var(--card);border-bottom:1px solid var(--border);box-shadow:var(--shadow);flex-direction:column;align-items:stretch;gap:4px}.nav.nav-open{display:flex}.nav a,.theme-toggle{text-align:left;padding:10px 0}.profile-link{order:-1}.wrap{margin:18px auto;padding:0 14px}.card{padding:17px;border-radius:13px}table{min-width:620px}.grid{grid-template-columns:1fr}.topbar{padding:10px 16px}.auth-shell{margin:4vh auto}.result-item{flex-direction:column;align-items:flex-start;gap:8px}}
/* --- Nav hover polish --- */
.nav a{position:relative;padding:6px 2px;transition:color .15s}.nav a:not(.profile-link)::after{content:"";position:absolute;left:2px;right:2px;bottom:-2px;height:2px;background:var(--primary);transform:scaleX(0);transform-origin:left;transition:transform .18s ease}.nav a:not(.profile-link):hover{color:var(--primary);text-decoration:none}.nav a:not(.profile-link):hover::after{transform:scaleX(1)}.profile-link{transition:opacity .15s}.profile-link:hover{opacity:.8;text-decoration:none}.theme-toggle{transition:transform .2s}.theme-toggle:hover{transform:rotate(20deg)}
/* --- Librarian dashboard bits --- */
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:0 14px}@media(max-width:640px){.grid-2{grid-template-columns:1fr}}
.checkbox-row{display:flex;align-items:center;gap:8px;font-weight:400;margin-top:14px}.checkbox-row input{width:auto}
.btn-secondary{background:var(--border);color:var(--text)}.btn-secondary:hover{background:var(--muted);color:#fff}
.btn-tiny{padding:2px 9px;margin:0;font-size:13px;border-radius:6px}
.badge-ok{background:#dff6eb;color:#096846}.badge-overdue{background:#fde8eb;color:#a32134}.badge-pending{background:#fff4dc;color:#8a5a05}
.scan-field{display:flex;gap:8px}.scan-field input{flex:1}.scan-field .scan-trigger{margin-top:0;white-space:nowrap}
.lookup-result{display:flex;gap:12px;align-items:center;padding:12px;border:1px solid var(--border);border-radius:10px;margin-top:10px;background:var(--bg)}.lookup-result img{width:44px;height:44px;border-radius:50%;object-fit:cover;flex-shrink:0}
.tabs{display:flex;gap:4px;margin-bottom:16px;border-bottom:1px solid var(--border);overflow-x:auto}
.tab-btn{background:transparent;color:var(--muted);border:0;padding:10px 14px;margin:0;border-bottom:2px solid transparent;border-radius:0;cursor:pointer;font-weight:700;white-space:nowrap;text-decoration:none;display:inline-block}
.tab-btn:hover{color:var(--primary);text-decoration:none}.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-panel[hidden]{display:none}
/* --- Scanner modal: fixed square viewport, video always fills it via object-fit:cover,
   overlay drawn purely with CSS percentages so it can never drift out of alignment
   with the actual camera feed on any phone. --- */
.scanner-modal{position:fixed;inset:0;background:rgba(10,14,25,.75);display:flex;align-items:center;justify-content:center;z-index:200;padding:16px;overflow:hidden}
.scanner-modal[hidden]{display:none}
body.scanner-open{overflow:hidden}
.scanner-box{background:var(--card);border-radius:16px;padding:16px;width:100%;max-width:360px;max-height:calc(100vh - 32px);box-shadow:var(--shadow);overflow:hidden;box-sizing:border-box}
.scanner-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px;gap:10px}
.scanner-head h3{font-size:1rem;margin:0}
.scanner-close{background:transparent;border:0;color:var(--text);font-size:24px;cursor:pointer;padding:0;margin:0;line-height:1}
.scanner-viewport{position:relative;width:100%;aspect-ratio:1/1;background:#000;border-radius:12px;overflow:hidden;box-sizing:border-box}
.scanner-viewport video{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;display:block;background:#000}
.scanner-frame{position:absolute;top:14%;left:14%;right:14%;bottom:14%;pointer-events:none}
.scanner-frame span{position:absolute;width:24px;height:24px;border:3px solid #fff;opacity:.9}
.scanner-frame span:nth-child(1){top:0;left:0;border-right:0;border-bottom:0;border-top-left-radius:6px}
.scanner-frame span:nth-child(2){top:0;right:0;border-left:0;border-bottom:0;border-top-right-radius:6px}
.scanner-frame span:nth-child(3){bottom:0;left:0;border-right:0;border-top:0;border-bottom-left-radius:6px}
.scanner-frame span:nth-child(4){bottom:0;right:0;border-left:0;border-top:0;border-bottom-right-radius:6px}
.scanner-laser{position:absolute;left:14%;right:14%;top:14%;height:2px;background:linear-gradient(90deg,transparent,#ff4d4f,transparent);animation:scannerSweep 2s linear infinite;pointer-events:none}
@keyframes scannerSweep{0%{top:14%}50%{top:86%}100%{top:14%}}
.scanner-hint{margin:10px 0 0;text-align:center;font-size:13px}
.scanner-controls{display:flex;gap:8px;margin-top:10px}
.scanner-controls select{flex:1;padding:8px 10px}
.scanner-controls select[hidden]{display:none}
.scanner-controls #scannerTorch{margin-top:0}
.scanner-controls #scannerTorch.is-on{background:var(--primary);color:#fff}
.scanner-error{color:var(--danger);text-align:center;margin-top:8px;font-size:13px}
.scanner-manual{margin-top:10px}
@media(max-width:480px){.scanner-box{max-width:100%}}
/* --- Print: broadsheet-only output for assessment results --- */
.print-title{display:none}
@media print{
  .nav,.topbar,.menu-toggle,.theme-toggle,footer,.no-print,.flash{display:none!important}
  body{background:#fff;color:#000}
  .card{box-shadow:none;border:1px solid #000;break-inside:avoid}
  .broadsheet{border:none}
  .broadsheet table{border-collapse:collapse;width:100%}
  .broadsheet table th,.broadsheet table td{border:1px solid #000;padding:4px 8px;color:#000}
  .print-title{display:block}
  a{color:#000;text-decoration:none}
}
/* --- Card header row (title + action in top-right corner) --- */
.card-header-row{display:flex;justify-content:space-between;align-items:flex-start;gap:12px;flex-wrap:wrap;margin-bottom:6px}
.card-header-row h1,.card-header-row h2{margin:0}
.danger-menu{position:relative}
.danger-menu summary{list-style:none;cursor:pointer;display:inline-block}
.danger-menu summary::-webkit-details-marker,.danger-menu summary::marker{display:none;content:""}
.danger-menu-panel{position:absolute;right:0;top:calc(100% + 8px);background:var(--card);border:1px solid var(--danger);border-radius:10px;padding:16px;width:290px;max-width:80vw;box-shadow:var(--shadow);z-index:30}
@media(max-width:480px){.danger-menu-panel{position:fixed;right:16px;left:16px;width:auto}}
/* --- Row-level edit dropdown (same mechanics as .danger-menu, neutral color) --- */
.edit-menu{position:relative;display:inline-block}
.edit-menu summary{list-style:none;cursor:pointer;display:inline-block}
.edit-menu summary::-webkit-details-marker,.edit-menu summary::marker{display:none;content:""}
.edit-menu-panel{position:absolute;right:0;top:calc(100% + 8px);background:var(--card);border:1px solid var(--primary);border-radius:10px;padding:16px;width:320px;max-width:85vw;box-shadow:var(--shadow);z-index:30;text-align:left}
@media(max-width:480px){.edit-menu-panel{position:fixed;right:16px;left:16px;width:auto}}
/* --- Collapsible "add" forms --- */
details.add-toggle summary{cursor:pointer;font-weight:700;color:var(--primary);list-style:none;display:inline-flex;align-items:center;gap:6px}
details.add-toggle summary::-webkit-details-marker{display:none}
details.add-toggle summary::before{content:"+";display:inline-block;width:18px;height:18px;border-radius:50%;background:var(--primary);color:#fff;text-align:center;line-height:18px;font-size:14px;transition:transform .15s}
details.add-toggle[open] summary::before{content:"\2212";transform:rotate(180deg)}
details.add-toggle form{margin-top:14px}
/* --- Class chat --- */
.chat-window{max-height:420px;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:12px;background:var(--bg);border-radius:10px;border:1px solid var(--border);scroll-behavior:smooth}
.chat-window-readonly{max-height:600px}
.chat-msg{max-width:78%;align-self:flex-start;background:var(--card);border:1px solid var(--border);border-radius:12px;padding:8px 12px}
.chat-msg-mine{align-self:flex-end;background:var(--primary);color:#fff;border-color:transparent}
.chat-msg-mine .muted{color:rgba(255,255,255,.8)}
.chat-msg-meta{font-size:12px;margin-bottom:3px;display:flex;gap:6px;flex-wrap:wrap}
.chat-msg-body{white-space:pre-wrap;word-break:break-word}
.chat-msg-file a{color:inherit;text-decoration:underline}
.chat-form{margin-top:12px}
.chat-form textarea{width:100%;resize:vertical}
.chat-form-row{display:flex;gap:10px;align-items:center;margin-top:8px;flex-wrap:wrap}
.chat-form-row input[type=file]{flex:1;min-width:180px}
@media(max-width:640px){.chat-msg{max-width:92%}}
.text-danger{color:var(--danger)}