@charset "UTF-8";
:root{--navy:#123456;--ink:#21354a;--muted:#64768a;--blue:#286aa5;--line:#dce5ed;--bg:#f3f6f9;--orange:#bb713d;--teal:#317c78;--white:#fff;font-family:Arial,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{outline-offset:4px}button,a{touch-action:manipulation}button{cursor:pointer}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(27px,3.1vw,40px);letter-spacing:-.9px;line-height:1.25}h2{font-size:23px;letter-spacing:-.4px}h3{font-size:18px;line-height:1.4}p{line-height:1.7}svg{display:block}.masthead,.topnav,main,footer{max-width:1240px;margin:auto}.masthead{display:flex;align-items:center;justify-content:space-between;padding:25px 36px;gap:20px}.identity{display:flex;gap:17px;align-items:center}.identity img{object-fit:contain}.identity>span{min-width:0}.identity strong{display:block;font-size:19px;font-weight:700;letter-spacing:-.3px;line-height:1.35;margin-top:6px;color:var(--navy)}.school{display:block;font-size:12px;font-weight:600;letter-spacing:.65px;line-height:1.45;color:#526a80;white-space:normal}.version{font-size:12px;padding:8px 12px;border:1px solid var(--line);border-radius:30px;background:#fff;white-space:nowrap}.dot{display:inline-block;width:6px;height:6px;background:var(--teal);border-radius:50%;margin-right:5px}.topnav{display:flex;align-items:center;justify-content:flex-end;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:0 36px;gap:12px}.navlinks{display:flex;gap:32px;margin-left:auto}.navlinks a{padding:19px 0;font-size:13px;color:var(--muted);border-bottom:3px solid transparent}.navlinks a[aria-current=page]{border-bottom-color:var(--blue);color:var(--navy);font-weight:700}main{padding:30px 36px 46px;min-height:60vh}.hero{background:var(--navy);border-radius:10px;color:#fff;display:grid;grid-template-columns:1.4fr 1fr;overflow:hidden;position:relative}.hero-copy{padding:38px 42px}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:10px;font-weight:700;margin-bottom:18px}.hero .eyebrow{color:#a9c9e0}.hero h1{max-width:590px;margin-bottom:14px}.hero p{color:#c3d4e3;font-size:14px;margin-bottom:25px;max-width:510px}.hero-art{display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,transparent,#1d486b);padding:25px}.hero-art svg{width:100%;max-width:350px;height:auto}.hero-tag{display:flex;gap:14px;align-items:center;font-size:12px;color:#d4e1ea}.hero-tag span{background:#ffffff12;border:1px solid #ffffff24;padding:8px 12px;border-radius:4px}.section-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:32px 0 18px}.section-heading h2{margin-bottom:7px}.section-heading p{margin:0;color:var(--muted);font-size:13px}.search{position:relative;min-width:265px}.search input{width:100%;border:1px solid var(--line);background:#fff;border-radius:6px;padding:12px 15px;color:var(--ink)}.course-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}.course-card{background:#fff;border:1px solid var(--line);border-radius:8px;overflow:hidden}.card-top{padding:23px 24px 20px;display:flex;align-items:center;gap:16px}.course-symbol{width:49px;height:49px;border-radius:8px;display:grid;place-items:center;background:#e9f1fa;color:var(--blue);flex-shrink:0}.course-symbol svg{width:29px;height:29px}.course-symbol.teal{color:var(--teal);background:#ebf4f1}.course-symbol.orange{color:var(--orange);background:#fcf1e8}.course-symbol.slate{color:#667786;background:#eff2f5}.card-title{flex:1}.card-title h2{font-size:20px;margin:0 0 6px}.card-title p{font-size:12px;color:var(--muted);margin:0}.course-actions{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--line);padding:8px 13px 14px;gap:3px}.course-actions a{display:flex;align-items:center;gap:8px;justify-content:space-between;font-size:13px;padding:12px 11px;border-radius:4px}.course-actions a:hover{background:var(--bg);color:var(--blue)}.course-actions a:last-child:nth-child(odd){grid-column:1/-1}.reserve .course-actions a{color:var(--muted)}.home-note{display:flex;align-items:center;gap:17px;margin-top:22px;padding:17px 20px;border-left:3px solid #7c9ab4;background:#eaf0f6;color:#4d657c;border-radius:3px;font-size:12px;line-height:1.6}.home-note strong{color:var(--navy);white-space:nowrap}.home-note a{margin-left:auto;white-space:nowrap;font-weight:700;color:var(--blue)}.breadcrumbs{display:flex;gap:9px;align-items:center;flex-wrap:wrap;color:var(--muted);font-size:12px;margin-bottom:25px}.breadcrumbs a:hover{text-decoration:underline}.page-title{margin:0 0 10px}.intro{font-size:14px;color:var(--muted);margin-bottom:26px}.content-grid{display:grid;grid-template-columns:minmax(0,1fr) 270px;gap:22px}.panel{border:1px solid var(--line);border-radius:8px;background:#fff;padding:24px;margin-bottom:20px}.panel h2{font-size:19px;margin-bottom:17px}.panel h3{margin-bottom:10px}.list-item{display:flex;align-items:center;gap:16px;justify-content:space-between;padding:19px 0;border-top:1px solid var(--line)}.list-item:first-child{border:0}.list-item h3{margin:0 0 5px;font-size:16px}.list-item p{margin:0;font-size:12px;color:var(--muted)}.badge{font-size:10px;letter-spacing:.1px;display:inline-block;padding:6px 9px;background:#eaf3f0;color:#2b7065;border-radius:4px;white-space:nowrap}.badge.pending{background:#f0f3f6;color:#697c8e}.badge.warn{background:#fff0d9;color:#8c581a}.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid var(--line);border-radius:5px;padding:11px 15px;background:#fff;font-size:12px;font-weight:700;min-height:40px}.btn.primary{background:var(--blue);border-color:var(--blue);color:#fff}.btn:hover{filter:brightness(.96)}.btn:disabled{cursor:not-allowed;opacity:.6}.toolbar{display:flex;align-items:end;gap:13px;justify-content:space-between;margin-bottom:20px;flex-wrap:wrap}.toolbar label{flex:1;max-width:400px}.field label,label.field{display:block;font-size:12px;color:var(--muted)}select,input,textarea{color:var(--ink)}.field input,.field select,.field textarea,.toolbar select{display:block;width:100%;margin-top:8px;padding:11px 12px;border:1px solid #ccd8e3;border-radius:5px;background:#fff;min-height:42px}.field input:focus,.field textarea:focus,.toolbar select:focus{border-color:var(--blue)}.field-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.small-note{font-size:12px;color:var(--muted);line-height:1.7;margin:12px 0 0}.load-grid{display:grid;grid-template-columns:repeat(5,1fr);border:1px solid var(--line);border-radius:6px;overflow:hidden;margin:17px 0}.load-cell{text-align:center;padding:16px 6px;border-right:1px solid var(--line)}.load-cell:last-child{border:0}.load-cell span{display:block;font-size:11px;color:var(--muted);margin-bottom:9px}.load-cell strong{font-size:23px;letter-spacing:-.6px;color:var(--navy)}.load-cell small{display:block;color:var(--muted);font-size:10px;margin-top:6px}.facts{display:grid;grid-template-columns:1fr 1fr;gap:0 20px}.facts div{padding:11px 0;border-bottom:1px solid var(--line);font-size:12px;display:flex;gap:10px;justify-content:space-between}.facts span{color:var(--muted)}.facts strong{text-align:right}.instructions{padding-left:20px;font-size:13px;line-height:1.85;color:#4b6278}.sidebar h3{font-size:15px}.sidebar p{font-size:12px}.sidebar .rule{padding-top:13px;margin-top:13px;border-top:1px solid var(--line)}.notice{padding:15px 17px;background:#eff4fa;border-left:3px solid var(--blue);border-radius:3px;font-size:12px;line-height:1.75;color:#45647f}.notice.warning{background:#fff5e6;border-color:#cc934a;color:#855a23}.notice.error{background:#fff0ef;border-color:#bb534b;color:#95443e}.module-tabs{display:flex;flex-wrap:wrap;gap:7px;margin:20px 0}.module-tabs a{padding:11px 15px;font-size:12px;border:1px solid var(--line);border-radius:5px;background:#fff}.module-tabs a[aria-current=page]{background:var(--navy);border-color:var(--navy);color:#fff}.bench-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.04fr);gap:20px;align-items:start}.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:18px 0}.metric{background:var(--bg);padding:16px;border-radius:5px}.metric small{display:block;color:var(--muted);font-size:11px;margin-bottom:8px}.metric strong{display:block;font-size:23px;color:var(--navy)}.metric strong small{display:inline;font-size:11px;font-weight:400;margin-left:5px}.results-table{width:100%;border-collapse:collapse;font-size:12px;margin-top:15px}.results-table th{text-align:left;color:var(--muted);font-weight:400}.results-table th,.results-table td{padding:11px 7px;border-bottom:1px solid var(--line)}.results-table td{font-variant-numeric:tabular-nums;text-align:right}.results-table thead th{font-weight:700;color:var(--ink);background:var(--bg)}.table-scroll{overflow-x:auto}.status-heading{display:flex;justify-content:space-between;gap:15px;align-items:center}.status-heading h2{margin:0}.diagram{background:#f4f7fa;border-radius:6px;margin:16px 0;padding:14px}.diagram svg{width:100%;max-height:190px}.empty-state{text-align:center;padding:38px 22px}.empty-state h2{font-size:21px}.empty-state p{font-size:14px;color:var(--muted);max-width:470px;margin:0 auto 22px}.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.guide-grid .panel p{font-size:13px;color:var(--muted)}.step-no{display:inline-flex;align-items:center;justify-content:center;color:var(--blue);background:#eaf1f8;font-weight:700;width:30px;height:30px;border-radius:50%;margin-bottom:18px}.loading{padding:70px;text-align:center;color:var(--muted)}footer{border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:20px;padding:23px 36px;font-size:11px;color:var(--muted);line-height:1.8}footer strong{color:var(--navy)}footer span:last-child{text-align:right}#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);padding:12px 18px;background:var(--navy);color:white;border-radius:6px;font-size:12px;display:none;z-index:5}#toast.show{display:block}.skip-link{position:fixed;left:12px;top:-60px;background:#fff;padding:12px;z-index:10}.skip-link:focus{top:12px}[hidden]{display:none!important}.print-only{display:none}
.ptk-signature{position:fixed;left:12px;bottom:8px;color:#758292;font-size:10px;line-height:1.2;letter-spacing:.25px;pointer-events:none;user-select:none;z-index:2}footer{padding-bottom:34px}
@media print{.ptk-signature{position:static;text-align:left;margin:8px 0;color:#777;font-size:9px}}
@media(max-width:950px){.masthead,.topnav,main,footer{padding-left:24px;padding-right:24px}.hero-copy{padding:30px}.hero{grid-template-columns:1.6fr 1fr}.content-grid{grid-template-columns:minmax(0,1fr) 230px}.bench-grid{grid-template-columns:1fr}.bench-grid>.panel{margin-bottom:0}.sidebar{min-width:0}.guide-grid{grid-template-columns:1fr}.hero h1{font-size:30px}}
@media(max-width:650px){.masthead{padding:19px 17px;gap:8px}.identity{gap:10px}.identity img{width:40px;height:40px}.identity strong{font-size:13px;line-height:1.4;margin-top:5px}.school{font-size:9px;letter-spacing:.3px;line-height:1.5}.version{display:none}.topnav{padding:0 17px}.navlinks{gap:16px}.navlinks a{font-size:11px;padding:16px 0}main{padding:20px 17px 32px}.hero{grid-template-columns:1fr}.hero-copy{padding:27px 24px}.hero h1{font-size:28px}.hero p{font-size:13px}.hero-art{display:none}.hero-tag{gap:7px;font-size:10px}.hero-tag span{padding:7px 8px}.section-heading{display:block;margin-top:26px}.search{min-width:0;margin-top:16px}.course-grid{grid-template-columns:1fr;gap:14px}.card-top{padding:20px}.home-note{display:block;font-size:11px}.home-note strong{display:block;margin-bottom:5px}.home-note a{display:block;margin-top:8px}.content-grid{grid-template-columns:1fr}.panel{padding:19px}.load-cell strong{font-size:18px}.load-cell span{font-size:10px}.load-cell small{font-size:9px}.load-grid{margin:16px 0}.facts{grid-template-columns:1fr}.field-grid{grid-template-columns:1fr 1fr}.field-grid .wide{grid-column:1/-1}.list-item{gap:10px}.list-item .badge{display:none}.sidebar{display:block}.toolbar{display:block}.toolbar .btn{margin-top:14px}.module-tabs{gap:5px}.module-tabs a{padding:10px;font-size:11px}footer{padding:20px 17px;font-size:10px}.status-heading{align-items:start;flex-direction:column}.metrics{gap:8px}.metric{padding:12px}.metric strong{font-size:20px}}
@media print{body{background:white;color:black}.masthead{padding:15px 0}.masthead img{width:40px;height:40px}.masthead .version,.topnav,footer,.breadcrumbs,.toolbar,.sidebar,.no-print,#toast{display:none!important}main{padding:10px 0;max-width:none}.content-grid{display:block}.panel{border:1px solid #bbb;break-inside:avoid}.load-grid{break-inside:avoid}.print-only{display:block}a[href]:after{content:none}.page-title{font-size:25px}.bench-grid{display:block}.hero-art{display:none}}

.brand-logos{position:relative;display:flex;align-items:center;gap:4px;flex:0 0 auto}.identity .brand-logos img{display:block;width:54px;height:54px;object-fit:contain;flex:0 0 54px}.brand-shine{position:absolute;inset:0;overflow:hidden;pointer-events:none;mask-image:url("assets/logo_dhxd.png"),url("assets/logo_geo.png");mask-size:54px 54px,54px 54px;mask-position:left center,right center;mask-repeat:no-repeat;-webkit-mask-image:url("assets/logo_dhxd.png"),url("assets/logo_geo.png");-webkit-mask-size:54px 54px,54px 54px;-webkit-mask-position:left center,right center;-webkit-mask-repeat:no-repeat}.brand-shine::before{content:"";position:absolute;inset:-10% -50%;background:linear-gradient(105deg,transparent 42%,rgba(255,255,255,.06) 46%,rgba(255,255,255,.32) 50%,rgba(255,255,255,.06) 54%,transparent 58%);transform:translateX(-90%);animation:brand-shine 9s linear infinite}@keyframes brand-shine{0%{transform:translateX(-90%)}80%,100%{transform:translateX(90%)}}@media(max-width:650px){.identity .brand-logos img{width:40px;height:40px;flex-basis:40px}.brand-shine{mask-size:40px 40px,40px 40px;-webkit-mask-size:40px 40px,40px 40px}}@media(prefers-reduced-motion:reduce){.brand-shine{display:none}}@media print{.brand-shine{display:none}}

#student-account{overflow-wrap:anywhere;margin-bottom:10px}#save-status{margin-top:20px}#answer-form [aria-invalid=true]{border-color:#bb534b;background:#fff7f6}#assignment-panel>.btn{margin-top:14px}#assignment-panel>.panel{margin-top:20px;margin-bottom:0}

/* Match the available window width; do not force a screen aspect ratio. */
.student-workspace{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;align-items:start}
.student-workspace>.panel{min-width:0;margin-bottom:0}
.student-workspace{margin-bottom:20px}
.student-statement .facts{grid-template-columns:minmax(0,1fr)}
.student-statement .facts strong{overflow-wrap:anywhere}
.student-answer .field-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
.student-answer .field{min-width:0;line-height:1.5}
.student-answer input,.student-answer select{min-width:0;max-width:100%}
.student-answer .toolbar{margin-bottom:12px;align-items:center}
@media screen and (min-width:1100px){
 .student-workspace{grid-template-columns:minmax(340px,.8fr) minmax(0,1.2fr);gap:24px}
 .student-statement{position:sticky;top:20px;max-height:calc(100vh - 40px);max-height:calc(100dvh - 40px);overflow-y:auto}
 .student-statement .load-cell strong{font-size:19px}
}
@media screen and (min-width:1600px){
 .masthead,.topnav,main,footer{max-width:1440px}
 .student-answer .field-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media screen and (min-width:950px) and (max-height:850px){
 .masthead{padding-top:16px;padding-bottom:16px}
 .navlinks a{padding-top:13px;padding-bottom:13px}
 main{padding-top:22px}
 .hero-copy{padding-top:26px;padding-bottom:26px}
 .hero .eyebrow{margin-bottom:12px}
 .hero h1{font-size:34px;margin-bottom:10px}
 .hero p{margin-bottom:17px}
 .section-heading{margin-top:24px;margin-bottom:14px}
 .card-top{padding-top:19px;padding-bottom:17px}
 .course-actions{padding-bottom:10px}
 .course-actions a{padding-top:9px;padding-bottom:9px}
}
@media screen and (max-width:420px){
 .student-answer .field-grid{grid-template-columns:minmax(0,1fr)}
}
@media print{
 .student-workspace{display:block}
 .student-statement{position:static;max-height:none;overflow:visible;margin-bottom:18px!important}
 .student-answer{break-inside:auto}
 .student-answer .field{break-inside:avoid}
}

.student-access{display:grid;grid-template-columns:minmax(0,1fr);gap:20px;margin-bottom:20px;align-items:start}
.student-access>.panel{min-width:0;margin-bottom:0}
.student-access .toolbar{margin-bottom:12px}
.student-access .notice{margin-bottom:0}
@media screen and (min-width:1100px){.student-access{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:24px}}
@media print{.student-access{display:none}}

/* Offline entry follows the paper submission; one answer column on phones. */
.student-workspace.offline-entry{display:block;max-width:880px;margin:0 auto 20px}
.offline-entry .student-answer{width:100%;min-width:0}
.entry-heading .notice{font-variant-numeric:tabular-nums}
@media screen and (max-width:640px){
 .student-answer .field-grid{grid-template-columns:minmax(0,1fr)}
 .student-answer input,.student-answer select{font-size:16px;min-height:48px}
 .student-answer .toolbar .btn{min-height:48px;flex:1;text-align:center}
 .offline-entry .student-answer{padding:18px 14px}
 .offline-entry .field{gap:6px;margin-bottom:6px}
}

@media screen and (max-width:640px){
 #teacher-classes .toolbar{display:grid;grid-template-columns:1fr;width:100%}
 #teacher-classes .btn{width:100%;min-height:52px;font-size:16px;text-align:center}
 #teacher-classes .panel{padding:18px 14px}
}

/* Text tables align each heading with the values beneath it. */
.teacher-session-table th,.teacher-session-table td,
.submission-history-table th,.submission-history-table td{text-align:left;vertical-align:top}
.teacher-session-table th:nth-child(1){width:36%}
.teacher-session-table th:nth-child(2){width:22%}
.teacher-session-table th:nth-child(3){width:42%}
.teacher-session-table td:last-child{white-space:nowrap}

/* Teacher preparation and printable, answer-free papers. */
#teacher-prep-wrapper{margin:0 0 24px;border:1px solid var(--line);border-radius:8px;background:white}
#teacher-prep-wrapper>summary{padding:18px 24px;cursor:pointer;font-weight:700;color:var(--navy)}
.teacher-prep{border:0;margin:0}.teacher-prep form{margin-bottom:24px}.teacher-prep h3{margin-top:26px}
.teacher-prep textarea{width:100%;font-size:16px;min-height:140px;padding:12px;border:1px solid var(--line);border-radius:6px}
.prep-actions,.prep-session{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.prep-session{justify-content:space-between;padding:15px 0;border-top:1px solid var(--line)}
.prep-session p{margin:5px 0}.prep-table th,.prep-table td{text-align:left;vertical-align:top}
@media screen and (max-width:640px){.teacher-prep{padding:18px 14px}.prep-actions .btn,.prep-session .btn{width:100%;min-height:48px}.teacher-prep input,.teacher-prep select{font-size:16px;min-height:48px}}
@media print{
 @page{size:A4;margin:16mm}
 body.printing-teacher{background:white!important;color:black}
 body.printing-teacher .masthead,body.printing-teacher .topnav,body.printing-teacher footer,body.printing-teacher .ptk-signature,body.printing-teacher #toast{display:none!important}
 body.printing-teacher main{padding:0;max-width:none;margin:0;min-height:0}
 body.printing-teacher main>*:not(#teacher-prep-wrapper){display:none!important}
 body.printing-teacher #teacher-prep-wrapper{display:block!important;border:0;margin:0}
 body.printing-teacher #teacher-prep-wrapper>summary{display:none!important}
 body.printing-teacher .teacher-prep{padding:0;margin:0;border:0}
 body.printing-teacher .teacher-prep>*:not(#prep-print){display:none!important}
 body.printing-teacher .teacher-print{display:block!important;font-size:11pt}
 .teacher-print h1{font-size:17pt;letter-spacing:0;margin:12pt 0}
 .teacher-print h2{font-size:13pt;margin:10pt 0}
 .teacher-print p{font-size:10pt;line-height:1.5;margin:8pt 0}
 .teacher-print table{width:100%;border-collapse:collapse;font-size:9pt;margin:10pt 0}
 .teacher-print th,.teacher-print td{border:1px solid #aaa;padding:5pt;text-align:left}
 .exam-roster,.exam-paper{break-after:page}.exam-paper:last-child{break-after:auto}
 .exam-answer-lines{display:grid;grid-template-columns:1fr 1fr;gap:10pt;font-size:10pt;margin:16pt 0}
 .exam-paper-footer{font-size:8pt!important}.exam-school{font-weight:600}
}

#student-registration{max-width:880px;margin:0 auto 20px}
#student-registration summary{cursor:pointer;font-weight:700;font-size:17px;margin-bottom:16px;color:var(--navy)}
#student-registration .btn{min-height:48px}
@media screen and (max-width:640px){#student-registration input{font-size:16px;min-height:48px}#student-registration .field-grid{grid-template-columns:1fr}}

@media print {
 @page kt1 {size:A4 landscape;margin:9mm}
 body.printing-teacher,body.printing-teacher *{background:#fff!important;color:#000!important;box-shadow:none!important;text-shadow:none!important}
 .kt1-paper{page:kt1;break-inside:avoid;font-family:Arial,sans-serif;font-size:9pt}
 .kt1-print h1{font-size:15pt;text-align:center;margin:3mm 0 1mm}
 .kt1-print header>strong{display:block;text-align:center;font-size:9pt}
 .kt1-print header p{text-align:center}
 .kt1-print h2{font-size:10pt;margin:2mm 0 1mm}
 .kt1-print p{font-size:9pt;line-height:1.3;margin:1.5mm 0}
 .kt1-print table{table-layout:fixed;font-size:9pt;margin:1.5mm 0}
 .kt1-print th,.kt1-print td{text-align:center;padding:1.5mm;border:0.25mm solid #000;font-weight:400}
 .kt1-print th{font-weight:600}
 .kt1-print .answer-blank{display:block;height:5mm}
 .paper-identity{display:flex;justify-content:space-between;gap:6mm}
 body.printing-teacher .kt1-print footer{display:flex!important;justify-content:space-between;font-size:8pt;margin-top:2mm}
}