:root{--blue:#07558d;--blue-d:#103d65;--blue-l:#e9f2fb;--sky:#e9f5ff;--gold:#e6b742;--ink:#12273d;--muted:#64758b;--line:#dce5ee;--page:#f5f8fc;--white:#fff;--good:#238163;--bad:#be4a51;--radius:17px;--shadow:0 10px 32px rgba(28,56,86,.08);font:16px/1.5 Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink)}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;width:100%}body{background:var(--page)}button,input,select{font:inherit}button{cursor:pointer}button:disabled{opacity:.45;cursor:not-allowed}a{color:var(--blue)}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:3px}button svg, .ico svg{display:block;width:19px;height:19px;stroke:currentColor;stroke-width:2;fill:none;stroke-linecap:round;stroke-linejoin:round}.ico{display:inline-flex;align-items:center;justify-content:center;flex:none}.ico.sm svg{width:16px;height:16px}.ico.lg svg{width:22px;height:22px}.btn{border:1px solid transparent;background:transparent;color:var(--ink);display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:43px;padding:10px 17px;border-radius:11px;font-weight:650;white-space:nowrap;transition:background .12s,border-color .12s,transform .12s}.btn:hover{background:#e9f1f9}.btn:active{transform:translateY(1px)}.btn.primary{background:var(--blue);color:white;box-shadow:0 4px 12px #07558d24}.btn.primary:hover{background:#064a7c}.btn.ghost{border-color:var(--line);background:white}.btn.ghost:hover{background:#f6faff}.btn.warning{background:#fff1d4;color:#865c04}.btn.smol{min-height:36px;padding:7px 11px;font-size:.85rem;border-radius:9px}.btn.icon-only{padding:8px;min-width:40px}.text-btn{border:0;background:none;color:var(--blue);font-weight:700;padding:7px 0}.brand{display:flex;align-items:center;gap:11px;font-weight:850;color:var(--blue-d);font-size:1.1rem;letter-spacing:-.04em}.brand-icon{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--blue);color:white;font-size:17px;font-weight:800;letter-spacing:0}.brand span strong{color:var(--blue)}.muted{color:var(--muted)}.tiny{font-size:.77rem}.eyebrow{text-transform:uppercase;color:var(--blue);font-weight:800;letter-spacing:.105em;font-size:.74rem}.pill{display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:50px;background:#edf4fc;color:#295979;font-size:.75rem;font-weight:740}.pill.gold{background:#fff5d9;color:#8d6807}.pill.good{background:#e7f6ef;color:#197152}.pill.grey{background:#f0f3f7;color:#657184}.shell{min-height:100vh;display:grid;grid-template-columns:246px minmax(0,1fr)}.sidebar{position:sticky;top:0;height:100vh;padding:26px 16px 22px 22px;background:#fff;border-right:1px solid var(--line);display:flex;flex-direction:column;gap:20px}.side-section{color:#97a6b8;font-weight:750;font-size:.68rem;letter-spacing:.1em;margin:24px 0 9px 12px}.side-link{width:100%;border:0;background:transparent;color:#52677e;padding:11px 13px;border-radius:11px;display:flex;align-items:center;gap:12px;font-size:.91rem;font-weight:660;text-align:left}.side-link:hover{background:#f2f7fc;color:var(--blue)}.side-link.active{background:#e9f2fb;color:var(--blue);font-weight:800}.side-bottom{margin-top:auto;background:#f4f8fd;border:1px solid #e5edf6;border-radius:15px;padding:15px;font-size:.82rem;color:#566f84}.side-bottom strong{color:#1e4d74}.main-area{min-width:0}.topline{height:78px;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:0 clamp(20px,4vw,52px);border-bottom:1px solid #e7edf4;background:#fff}.topline-title{font-size:.95rem;color:#48647e;font-weight:650}.topright{display:flex;align-items:center;gap:14px}.avatar{height:37px;width:37px;border-radius:12px;display:grid;place-items:center;background:#deebf6;font-weight:800;color:#2b668b}.content{max-width:1430px;margin:0 auto;padding:clamp(22px,3vw,48px) clamp(20px,4vw,52px) 80px}.hello{font-size:clamp(1.7rem,2.35vw,2.55rem);font-weight:820;letter-spacing:-.05em;line-height:1.15;margin:13px 0 11px}.subhead{max-width:680px;color:var(--muted);margin:0 0 32px}.hero{background:linear-gradient(112deg,#0d4e80,#0e6caa);border-radius:21px;color:#fff;padding:clamp(22px,3.2vw,40px);min-height:265px;position:relative;overflow:hidden;display:flex;align-items:center;box-shadow:var(--shadow)}.hero:before{content:"";position:absolute;width:460px;height:460px;right:-98px;top:-222px;border:1px solid #ffffff35;border-radius:50%;box-shadow:0 0 0 55px #ffffff0e,0 0 0 110px #ffffff0a}.hero-content{z-index:1;max-width:580px}.hero h2{font-size:clamp(1.5rem,2vw,2.25rem);letter-spacing:-.04em;line-height:1.18;margin:15px 0}.hero p{color:#d5e9fa;max-width:485px}.hero-ctas{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:25px}.hero .btn.primary{background:#fff;color:var(--blue);box-shadow:none}.hero .btn.primary:hover{background:#eef6fb}.hero .btn.outline{border-color:#9fc2e1;color:white}.hero .btn.outline:hover{background:#ffffff16}.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin:34px 0 17px}.section-head h2{font-size:1.22rem;letter-spacing:-.025em;margin:0}.metric-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px;margin-top:18px}.card,.metric{background:white;border:1px solid var(--line);border-radius:17px;box-shadow:0 4px 16px #1d416909}.metric{padding:20px 23px;display:flex;align-items:center;gap:15px}.metric-icon{height:46px;width:46px;border-radius:14px;background:#eaf4fd;display:grid;place-items:center;color:#17689d}.metric-icon.gold{background:#fff5de;color:#9c711c}.metric-icon.green{background:#e6f6ef;color:#238163}.metric-label{font-size:.82rem;color:#718299;font-weight:640}.metric-number{font-size:1.5rem;font-weight:820;letter-spacing:-.045em}.content-grid{display:grid;grid-template-columns:1.35fr 1fr;gap:17px}.card{padding:23px}.card-title{font-weight:780;letter-spacing:-.02em;margin:0 0 13px}.mini-options{display:grid;grid-template-columns:1fr 1fr;gap:11px}.mini-option{border:1px solid #e3eaf1;border-radius:12px;padding:16px;text-align:left;background:#fff;display:flex;flex-direction:column;gap:7px}.mini-option:hover{background:#f6faff;border-color:#bad2e5}.mini-option .ico{color:var(--blue);justify-content:flex-start}.mini-option span{font-weight:760}.mini-option small{color:var(--muted)}.item-list{margin-top:15px;display:flex;flex-wrap:wrap;gap:8px}.subject-pill{padding:5px 9px;border:1px solid #e2ebf3;border-radius:8px;font-size:.76rem;color:#547188}.thin-progress{height:8px;border-radius:10px;background:#e7edf4;overflow:hidden}.thin-progress>div{height:100%;background:var(--blue);border-radius:inherit;transition:width .2s}.soft-divider{height:1px;background:var(--line);margin:20px 0}.low-emphasis{font-size:.83rem;color:var(--muted)}
/* Exam */
.exam-shell{height:100dvh;display:flex;flex-direction:column;overflow:hidden;background:#f5f8fc}.exam-head{height:68px;min-height:68px;background:white;display:flex;align-items:center;gap:16px;padding:0 22px;border-bottom:1px solid var(--line)}.exam-brand{display:flex;align-items:center;gap:10px;font-weight:780;color:var(--blue-d);white-space:nowrap}.exam-brand .brand-icon{height:33px;width:33px}.head-divider{width:1px;height:29px;background:var(--line)}.exam-heading{min-width:0;display:flex;flex-direction:column}.exam-heading strong{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:.94rem}.exam-heading span{font-size:.77rem;color:var(--muted)}.exam-tools{display:flex;gap:8px;align-items:center;margin-left:auto}.timer{display:flex;align-items:center;gap:8px;color:#164d7a;font-weight:800;white-space:nowrap;background:#edf5fc;padding:9px 13px;border-radius:11px;font-variant-numeric:tabular-nums}.timer.urgent{color:#be4a51;background:#fff0f0}.progress-strip{height:4px;background:#dbeaf5;flex:none}.progress-strip>div{height:100%;background:#2793ca;transition:width .2s}.exam-body{min-height:0;flex:1;display:flex;position:relative}.question-area{flex:1;overflow:auto;min-width:0;scrollbar-gutter:stable}.question-wrap{max-width:890px;padding:clamp(23px,3vw,45px) clamp(20px,4vw,54px) 110px;margin:0 auto}.q-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:28px}.q-index{font-size:.84rem;font-weight:750;color:#597792}.q-label{margin-top:11px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}.q-card{background:white;border-radius:20px;border:1px solid #e0e8f2;padding:clamp(22px,3vw,38px);box-shadow:0 12px 34px #183f670a}.q-subtitle{font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;font-weight:800;color:#7a8ca1;margin-bottom:19px}.q-text{font-size:calc(1.085rem * var(--user-zoom,1));font-weight:530;line-height:1.7;white-space:pre-line;margin-bottom:25px;color:#1b2c40;overflow-wrap:anywhere}.answers{display:flex;flex-direction:column;gap:10px}.answer-option{display:flex;align-items:flex-start;gap:13px;width:100%;text-align:left;border:1.5px solid #e0e8f2;background:#fff;border-radius:12px;padding:15px 15px;min-height:56px;color:var(--ink);font-size:calc(.96rem * var(--user-zoom,1));line-height:1.47}.answer-option:hover{border-color:#92b8d6;background:#f7fbff}.answer-option.selected{border-color:#227cad;background:#f0f8ff;box-shadow:0 0 0 1px #227cad inset}.option-letter{height:25px;width:25px;display:grid;place-items:center;border-radius:7px;background:#f0f4f9;color:#627a90;flex:none;font-size:.78rem;font-weight:800}.answer-option.selected .option-letter{background:#1771a5;color:#fff}.answer-option .option-text{flex:1}.answer-option input{height:18px;width:18px;accent-color:#1575a7;margin-top:3px;flex:none}.answer-option.graphic{align-items:center}.graphic-preview svg{display:block;width:200px;max-width:100%;height:auto}.diagram{width:min(100%,600px);margin:12px 0 24px;padding:15px;border:1px solid var(--line);border-radius:13px;background:#fff;position:relative;overflow:hidden}.diagram svg{max-width:100%;height:auto;display:block}.diagram.hotspot{cursor:crosshair;background:#f8fbfd}.diagram.hotspot.selected{box-shadow:0 0 0 2px #1c78a5}.hotspot-dot{position:absolute;width:21px;height:21px;border-radius:50%;background:#227ead7d;border:3px solid #fff;box-shadow:0 0 0 2px #2474a1;pointer-events:none;transform:translate(-50%,-50%)}.form-field{border:1.5px solid #bdcddd;border-radius:11px;background:#fff;padding:12px 14px;max-width:320px;width:100%;font-size:1rem}.form-field:focus{border-color:var(--blue)}.field-help{font-size:.83rem;color:var(--muted);margin:10px 0}.dropzone{border:1.5px dashed #a8bdcf;border-radius:10px;background:#f5f9fd;min-width:160px;min-height:53px;display:flex;align-items:center;justify-content:center;padding:10px 15px;font-size:.88rem;font-weight:650;text-align:center}.dropzone.filled{background:#eaf4fc;border-style:solid;border-color:#75acd0}.drop-row{display:flex;gap:13px;flex-wrap:wrap;margin-top:17px}.drop-stack{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:13px 0}.drop-label{font-size:.78rem;color:#718299;margin-bottom:6px;font-weight:670}.token-tray{display:flex;gap:9px;flex-wrap:wrap;margin:18px 0}.token{border:1px solid #91b8d4;background:#fff;color:#205c84;border-radius:9px;padding:9px 12px;font-weight:700;font-size:.85rem;cursor:grab}.token.active{background:#146c9f;border-color:#146c9f;color:white}.token.used{opacity:.47}.fill-line{line-height:2.5;font-size:calc(1.02rem * var(--user-zoom,1))}.fill-line input{width:115px;border:1px solid #9fb5ca;border-radius:7px;padding:5px 8px;margin:0 4px;font-size:1em}.q-bottom{margin-top:20px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.save-note{color:#7790a2;font-size:.76rem;display:flex;align-items:center;gap:5px}.exam-foot{min-height:78px;background:white;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:12px clamp(16px,3vw,38px);gap:14px;flex:none}.foot-left,.foot-right{display:flex;align-items:center;gap:11px}.side-panel{width:310px;background:#fff;border-left:1px solid var(--line);padding:22px 19px;overflow:auto;flex:none}.panel-top{display:flex;justify-content:space-between;align-items:center;gap:8px}.panel-title{font-size:1rem;font-weight:800;letter-spacing:-.03em}.nav-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:8px;margin:20px 0}.num-btn{height:44px;border:1px solid #dce6ee;background:#fff;border-radius:9px;font-size:.85rem;font-weight:750;color:#516b81;position:relative}.num-btn:hover{background:#ecf5fb}.num-btn.current{background:#176b9f;border-color:#176b9f;color:#fff}.num-btn.answered:not(.current){background:#e5f5ee;border-color:#b6dbcb;color:#247559}.num-btn.flagged:after{content:"";height:6px;width:6px;border-radius:50%;position:absolute;right:4px;top:4px;background:#e1aa32}.legend{display:flex;gap:10px;flex-wrap:wrap;font-size:.72rem;color:#6b8194}.legend span:before{content:"";display:inline-block;vertical-align:middle;height:8px;width:8px;border-radius:50%;background:#ced9e3;margin-right:5px}.legend span.done:before{background:#2c9875}.legend span.flag:before{background:#e1aa32}.review-list{display:grid;gap:8px}.review-row{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:10px 12px;border:1px solid #e4edf3;border-radius:11px;background:white}.review-row strong{font-weight:760}.review-row small{color:var(--muted)}.review-row .pill{font-size:.69rem}.subject-breakdown{display:grid;gap:13px}.subject-row{display:flex;justify-content:space-between;gap:12px;font-size:.82rem;margin-bottom:5px}.floating-shade{position:fixed;inset:0;background:#091f3499;z-index:40;display:flex;align-items:center;justify-content:center;padding:17px}.modal{width:min(660px,100%);background:white;border-radius:19px;box-shadow:0 22px 90px #112b4470;max-height:min(92vh,900px);overflow:auto}.modal-head{padding:20px 24px;border-bottom:1px solid #e9eef4;display:flex;justify-content:space-between;align-items:center}.modal-head h2{font-size:1.15rem;margin:0;letter-spacing:-.03em}.modal-body{padding:23px 24px}.modal-actions{padding:15px 24px;border-top:1px solid #e7edf4;display:flex;justify-content:flex-end;flex-wrap:wrap;gap:10px}.handbook-shade{position:absolute;inset:0;background:#0b294c85;z-index:5}.handbook{width:min(520px,46%);flex:none;display:flex;flex-direction:column;background:#eff4f8;border-left:1px solid #d0dce8;position:relative;overflow:hidden}.handbook.panel-full{position:absolute;z-index:6;inset:0;width:100%}.handbook-bar{background:#fff;border-bottom:1px solid #e1e8f0;padding:12px 13px;display:flex;gap:7px;flex-wrap:wrap;align-items:center}.handbook-bar strong{font-size:.78rem;margin-right:auto}.handbook-bar .btn{min-height:31px;padding:5px 7px;font-size:.8rem}.handbook-page{flex:1;overflow:auto;display:flex;align-items:flex-start;justify-content:center;padding:24px 20px;background:#dfe7ee}.handbook-page img{width:var(--page-width,700px);max-width:none;height:auto;display:block;box-shadow:0 4px 24px #23405b25;background:white}.handbook-find{padding:9px 12px;background:#fff;border-bottom:1px solid #e1e8f0;display:flex;flex-wrap:wrap;gap:7px}.handbook-find input{flex:1;min-width:150px;height:34px;border:1px solid #c5d4e1;border-radius:8px;padding:5px 10px;font-size:.83rem}.search-results{max-height:130px;overflow:auto;background:white;border-bottom:1px solid var(--line)}.search-results button{width:100%;text-align:left;border:0;border-bottom:1px solid #eff3f7;background:white;padding:7px 14px;font-size:.74rem;color:#415f79}.search-results button:hover{background:#eff6fc}.handbook-footer{background:white;border-top:1px solid var(--line);padding:8px 12px;color:#65798e;font-size:.72rem}.toast{position:fixed;bottom:100px;left:50%;transform:translateX(-50%) translateY(20px);background:#143f60;color:white;border-radius:12px;padding:11px 18px;z-index:90;opacity:0;pointer-events:none;transition:all .18s;box-shadow:0 8px 20px #001e3e28}.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}.report-hero{padding:26px;background:linear-gradient(135deg,#0c4b7d,#126d9d);border-radius:18px;color:#fff}.report-hero h2{margin:0 0 8px;font-size:1.5rem}.score-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:18px 0}.score-stat{border:1px solid var(--line);border-radius:14px;background:white;padding:18px}.score-stat b{font-size:1.7rem;display:block;line-height:1.4}.report-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:13px;border-bottom:1px solid var(--line);background:white}.report-row button{border:0;background:none;color:var(--blue);font-weight:700;text-align:left}.report-row small{color:#798b9e}.answer-feedback{border-radius:11px;padding:15px;margin-top:21px;font-size:.89rem;line-height:1.68}.answer-feedback.correct{border:1px solid #a8dcc4;background:#effaf3}.answer-feedback.incorrect{border:1px solid #e6b7ba;background:#fff5f5}.answer-feedback h4{margin:0 0 7px;font-size:.94rem}.answer-feedback p{margin:4px 0}.alert{padding:13px 16px;border-radius:12px;background:#fff7e4;color:#7a5c11;border:1px solid #eedcae;font-size:.84rem}.offline-flag{font-size:.76rem;color:#8192a5}.hidden{display:none!important}
@media(max-width:1100px){.sidebar{width:76px;padding:22px 10px}.shell{grid-template-columns:76px minmax(0,1fr)}.sidebar .side-link span,.sidebar .side-section,.sidebar .brand span,.side-bottom{display:none}.sidebar .brand{justify-content:center}.side-link{justify-content:center}.side-link .ico svg{height:22px;width:22px}.content-grid{grid-template-columns:1fr}.side-panel{width:275px}.handbook{width:48%}}
@media(max-width:760px){.shell{display:block}.sidebar{display:none}.topline{height:62px;padding:0 17px}.topline-title{font-size:.83rem}.content{padding:24px 17px 90px}.metric-row{grid-template-columns:1fr}.metric{padding:14px}.hero{min-height:250px}.mini-options{grid-template-columns:1fr}.exam-head{padding:0 12px;gap:9px;height:62px;min-height:62px}.exam-brand>span:not(.brand-icon),.exam-heading span,.head-divider{display:none}.exam-tools{gap:3px}.exam-tools .btn span{display:none}.exam-tools .btn{padding:6px 8px;min-height:36px}.timer{padding:8px;font-size:.82rem}.exam-heading strong{max-width:120px;font-size:.8rem}.question-wrap{padding:18px 12px 110px}.q-card{padding:18px 15px;border-radius:13px}.q-text{font-size:calc(1.035rem * var(--user-zoom,1))}.exam-foot{padding:10px 12px;min-height:70px}.exam-foot .btn{font-size:.84rem;padding:8px 11px}.side-panel{position:absolute;inset:0 0 0 auto;width:min(350px,95vw);z-index:8;box-shadow:-8px 0 24px #16375430}.handbook{width:100%;position:absolute;z-index:9;inset:0}.handbook.panel-full{z-index:9}.handbook-page{padding:12px}.modal-head,.modal-body,.modal-actions{padding:17px}.score-grid{grid-template-columns:1fr}.report-row{align-items:flex-start}.low-emphasis{font-size:.79rem}}
@media(max-width:390px){.exam-heading strong{max-width:85px}.timer{font-size:.75rem}.foot-left,.foot-right{gap:5px}.exam-foot .btn{padding:7px 9px;min-height:38px}}

.handbook.browse{position:relative;width:100%;height:min(77vh,940px);min-height:530px;max-width:none;border:0;border-radius:0}.handbook.browse.panel-full{position:relative;inset:auto;width:100%}
@media(max-width:760px){.exam-tools .btn>.ico{display:inline-flex!important}.exam-tools .btn>span:not(.ico){display:none}.exam-tools .btn{min-width:36px}.exam-heading strong{max-width:100px}}

.hotspot-canvas{position:relative;display:inline-block;max-width:100%}.hotspot-canvas svg{display:block}.hotspot-canvas .hotspot-dot{left:var(--hotspot-x,50%);top:var(--hotspot-y,50%)}
.only-phone{display:none}.calc-shell{max-width:430px;margin:auto}.calc-display{border:1px solid var(--line);background:#f6faff;padding:14px;border-radius:12px;display:flex;flex-direction:column;gap:6px}.calc-display input{font:1.35rem ui-monospace,Consolas,monospace;border:0;background:transparent;outline:none;width:100%;text-align:right;color:#153d5d}.calc-display small{text-align:right;font-size:.85rem;color:#71859a;min-height:19px}.calc-mode{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:10px 0}.calc-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:7px}.calc-key{min-height:43px;border:1px solid #d1dfeb;border-radius:9px;background:#fff;color:#214762;font-weight:650}.calc-key:hover{background:#eaf4fc}.calc-key.equals{background:#0c6399;color:white;border-color:#0c6399}.scratch-tools{display:flex;align-items:center;justify-content:flex-end;gap:9px;margin-bottom:10px}.scratch-tools>span{margin-right:auto}
@media(max-width:760px){.only-phone{display:inline-flex}.hide-phone{display:none!important}.exam-heading strong{max-width:90px}.scratch-tools{flex-wrap:wrap}.calc-key{min-height:48px}}
@media(max-width:420px){.exam-heading{display:none}}