:root{
  --bg:#f4f6f8;
  --panel:#ffffff;
  --text:#18212c;
  --muted:#6c7785;
  --line:#dfe5eb;
  --blue:#285ea8;
  --blue-dark:#204b86;
  --blue-soft:#eef4ff;
  --green:#2a765d;
  --green-soft:#edf8f3;
  --red:#b5483c;
  --red-soft:#fff1ee;
  --shadow:0 24px 70px rgba(25,38,55,.12);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Pretendard,"Noto Sans KR","Apple SD Gothic Neo","Malgun Gothic",system-ui,sans-serif;color:var(--text);background:var(--bg)}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.hidden{display:none!important}

.topbar{
  height:68px;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;padding:0 28px;position:sticky;top:0;z-index:20;
  backdrop-filter:blur(10px)
}
.brand{display:flex;gap:11px;align-items:center}
.brand-mark{display:grid;place-items:center;width:34px;height:34px;border-radius:10px;background:#18212c;color:#fff;font-weight:900}
.brand div{display:flex;flex-direction:column;gap:1px}
.brand strong{font-size:15px;letter-spacing:-.02em}
.brand span:not(.brand-mark){font-size:11px;color:var(--muted)}
.version{font-size:12px;color:#788391;font-weight:700;letter-spacing:.03em}

main{min-height:calc(100vh - 68px)}
.view{min-height:calc(100vh - 68px)}

.start-view{display:grid;place-items:center;padding:36px 18px}
.start-card{
  width:min(900px,100%);background:#fff;border:1px solid var(--line);border-radius:28px;padding:44px;
  box-shadow:var(--shadow)
}
.eyebrow{font-size:11px;font-weight:900;letter-spacing:.14em;color:var(--blue);margin-bottom:12px}
.start-card h1{font-size:clamp(34px,5vw,58px);line-height:1.08;letter-spacing:-.05em;margin:0 0 18px}
.lead{font-size:15px;line-height:1.75;color:#596575;max-width:720px;margin:0 0 30px}
.student-form{display:grid;grid-template-columns:120px 120px 120px 1fr;gap:10px}
.student-form label,.classification-grid label{display:flex;flex-direction:column;gap:7px}
.student-form label span,.classification-grid label span{font-size:12px;font-weight:800;color:#596575}
input,select,textarea{
  border:1px solid #cfd7df;background:#fff;color:var(--text);border-radius:12px;outline:none;
  transition:border-color .15s,box-shadow .15s
}
input,select{height:48px;padding:0 13px}
.fixed-grade{height:48px;padding:0 13px;border:1px solid #cfd7df;background:#f7f9fb;border-radius:12px;display:flex;align-items:center;font-weight:800;color:#394554}
input:focus,select:focus,textarea:focus{border-color:#7ca5dd;box-shadow:0 0 0 3px rgba(59,116,193,.11)}
.primary,.secondary,.danger{
  min-height:44px;border-radius:12px;padding:0 18px;font-weight:850;border:1px solid transparent
}
.primary{background:var(--text);color:#fff}
.primary:hover{background:#0e151d}
.secondary{background:#fff;border-color:#cfd7df;color:#394554}
.danger{background:var(--red);color:#fff}
.large{width:100%;height:56px;margin-top:16px;font-size:18px;letter-spacing:-.02em}
.start-notes{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
.start-notes>div{background:#f7f9fb;border:1px solid #e4e8ed;border-radius:13px;padding:12px;display:flex;flex-direction:column;gap:4px}
.start-notes b{font-size:12px}
.start-notes span{font-size:11px;line-height:1.45;color:var(--muted)}

.error-box{margin-top:12px;background:var(--red-soft);border:1px solid #efcfc9;color:#8f3f35;padding:11px 13px;border-radius:11px;font-size:13px;line-height:1.5}

.exam-view{padding:18px}
.exam-shell{width:min(1180px,100%);margin:0 auto}
.exam-status-row{display:flex;justify-content:space-between;align-items:center;margin:3px 2px 9px}
.student-badge,.question-counter{font-size:12px;color:#5f6c7a}
.student-badge{font-weight:800;margin-right:12px}
.save-state{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:750;color:#65717f}
.save-state span{width:8px;height:8px;border-radius:50%;background:#3d936f}
.save-state.saving span{background:#d89c2d;animation:pulse 1s infinite}
.save-state.offline span{background:#c0554b}
.save-state.error span{background:#c0554b}
@keyframes pulse{50%{opacity:.35}}
.progress-track{height:5px;background:#dfe5eb;border-radius:999px;overflow:hidden;margin-bottom:12px}
.progress-bar{height:100%;width:0;background:#2e68b7;transition:width .2s ease}

.question-card{
  background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:0 16px 45px rgba(20,35,54,.08);
  padding:16px;display:grid;grid-template-columns:minmax(330px,42%) 1fr;gap:20px;min-height:calc(80vh - 152px)
}
.image-wrap{
  background:#f8fafb;border:1px solid #e4e9ee;border-radius:17px;overflow:hidden;
  min-height:0;display:grid;place-items:center
}
.image-wrap img{display:block;width:100%;height:100%;max-height:calc(80vh - 184px);object-fit:contain}
.question-body{display:flex;flex-direction:column;min-width:0;padding:6px 4px}
.question-label{font-size:11px;font-weight:900;letter-spacing:.08em;color:#718093;margin-bottom:8px}
.case-text{font-size:clamp(19px,2vw,27px);font-weight:820;letter-spacing:-.035em;line-height:1.48;margin:0 0 15px}
.answer-block{border-top:1px solid #e4e9ee;padding:13px 0 0;margin-top:3px}
.block-title{display:flex;justify-content:space-between;gap:12px;align-items:baseline;margin-bottom:10px}
.block-title strong{font-size:15px}
.block-title span{font-size:11px;color:var(--muted)}
.classification-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}
textarea{width:100%;min-height:96px;resize:vertical;padding:13px 14px;line-height:1.6;font-size:14px}
.textarea-meta{display:flex;justify-content:space-between;gap:12px;margin-top:6px;font-size:11px;color:#7a8592}
.exam-nav{display:grid;grid-template-columns:1fr auto 1fr;gap:10px;margin-top:12px}
.exam-nav button:last-child{justify-self:stretch}

.review-view,.submitted-view{display:grid;place-items:center;padding:30px 18px}
.review-card,.submitted-card{width:min(850px,100%);background:#fff;border:1px solid var(--line);border-radius:24px;padding:34px;box-shadow:var(--shadow)}
.review-card h2,.submitted-card h2{font-size:31px;letter-spacing:-.04em;margin:0 0 8px}
.review-summary{color:#5f6c7a;line-height:1.6;margin-bottom:20px}
.review-grid{display:grid;grid-template-columns:repeat(10,1fr);gap:8px}
.review-grid button{
  aspect-ratio:1;border-radius:10px;border:1px solid var(--line);background:#fff;font-weight:850;color:#4a5765
}
.review-grid button.done{background:var(--green-soft);border-color:#c9e7da;color:#25664f}
.review-grid button.missing{background:var(--red-soft);border-color:#efcdc6;color:#a34338}
.review-legend{display:flex;gap:18px;margin-top:12px;font-size:11px;color:#74808c}
.review-legend span{display:flex;align-items:center;gap:6px}
.review-legend i{width:10px;height:10px;border-radius:50%;display:inline-block}
.review-legend .done{background:#6daf91}.review-legend .missing{background:#d87669}
.review-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:22px}
.submit-warning{text-align:center;font-size:11px;color:#9a4b40;margin:10px 0 0}

.submitted-card{text-align:center;max-width:600px}
.success-mark{width:66px;height:66px;border-radius:50%;display:grid;place-items:center;margin:0 auto 14px;background:var(--green-soft);color:var(--green);font-size:31px;font-weight:900}
.submitted-card p{color:#687482;line-height:1.6}
.submitted-card dl{margin:24px auto 0;max-width:430px;border-top:1px solid var(--line)}
.submitted-card dl div{display:flex;justify-content:space-between;gap:15px;padding:11px 2px;border-bottom:1px solid var(--line);font-size:13px}
.submitted-card dt{color:var(--muted)}.submitted-card dd{margin:0;font-weight:750;text-align:right}

.modal{position:fixed;inset:0;background:rgba(12,18,25,.58);display:grid;place-items:center;padding:16px;z-index:100}
.modal-card,.confirm-card{background:#fff;border-radius:20px;box-shadow:0 25px 75px rgba(0,0,0,.25)}
.modal-card{width:min(700px,100%);padding:20px}
.modal-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:16px}
.modal-head>div{display:flex;flex-direction:column;gap:3px}
.modal-head strong{font-size:16px}.modal-head span{font-size:11px;color:var(--muted)}
.modal-head button{border:0;background:transparent;font-size:26px;line-height:1}
.question-map{display:grid;grid-template-columns:repeat(10,1fr);gap:7px}
.question-map button{aspect-ratio:1;border-radius:9px;border:1px solid var(--line);background:#fff;font-weight:800}
.question-map button.current{outline:2px solid #2c62a8;outline-offset:1px}
.question-map button.done{background:var(--green-soft);border-color:#c9e7da}
.question-map button.missing{background:#fff6f4;border-color:#efdad5}

.confirm-card{width:min(420px,100%);padding:28px;text-align:center}
.confirm-icon{width:50px;height:50px;border-radius:50%;background:var(--red-soft);color:var(--red);display:grid;place-items:center;margin:0 auto 12px;font-size:24px;font-weight:900}
.confirm-card h3{margin:0 0 7px}.confirm-card p{margin:0 0 20px;color:var(--muted);font-size:13px}
.confirm-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px}

@media(max-width:850px){
  .student-form{grid-template-columns:1fr 1fr}.name-field{grid-column:1/-1}
  .start-notes{grid-template-columns:1fr}
  .question-card{grid-template-columns:1fr;min-height:0}
  .image-wrap{height:min(38vh,360px)}
  .image-wrap img{max-height:none}
  .case-text{font-size:21px}
  .review-grid,.question-map{grid-template-columns:repeat(6,1fr)}
}
@media(max-width:560px){
  .topbar{height:60px;padding:0 15px}.brand strong{font-size:13px}.brand-mark{width:31px;height:31px}
  main,.view{min-height:calc(100vh - 60px)}
  .start-view{padding:12px}.start-card{padding:24px 18px;border-radius:20px}.student-form{grid-template-columns:1fr 1fr}
  .exam-view{padding:8px}
  .exam-status-row{align-items:flex-end}
  .question-card{padding:10px;border-radius:16px;gap:13px}
  .image-wrap{height:31vh;border-radius:13px}
  .question-body{padding:2px}
  .case-text{font-size:18px;line-height:1.48;margin-bottom:13px}
  .block-title{display:block}.block-title span{display:block;margin-top:3px}
  .classification-grid{grid-template-columns:1fr}
  textarea{min-height:105px}
  .exam-nav{grid-template-columns:1fr 1fr}.exam-nav #openMapBtn{grid-row:2;grid-column:1/-1}
  .review-card,.submitted-card{padding:24px 17px}.review-grid,.question-map{grid-template-columns:repeat(5,1fr)}
}

.final-submit-note{
  margin:16px 0 0;
  text-align:center;
  font-size:16px;
  line-height:1.5;
  font-weight:850;
  color:#9b443a;
  letter-spacing:-.02em;
}

.recover-btn{
  width:100%;
  margin-top:9px;
  min-height:44px;
}
.recovery-card{
  width:min(470px,100%);
  text-align:left;
}
.recovery-card h3{margin-top:0}
.recovery-form{
  display:grid;
  grid-template-columns:90px 90px 1fr;
  gap:8px;
  margin:14px 0 8px;
}
.recovery-status{
  margin:10px 0 0;
  padding:12px 13px;
  border-radius:11px;
  background:#eef4ff;
  border:1px solid #d6e4f5;
  color:#34567c;
  font-size:13px;
  line-height:1.55;
}
@media(max-width:520px){
  .recovery-form{grid-template-columns:1fr 1fr}
  .recovery-form input:last-child{grid-column:1/-1}
}

.timer-badge{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-width:78px;
  height:34px;
  padding:0 12px;
  margin-left:10px;
  border-radius:999px;
  border:1px solid #d4dde6;
  background:#f8fafc;
  color:#34495e;
  font-size:14px;
  font-weight:900;
  letter-spacing:.02em;
}
.timer-badge.warning{
  border-color:#e9c1b9;
  background:#fff4f1;
  color:#9d493a;
}
.timer-badge.urgent{
  border-color:#e2aaa0;
  background:#ffece8;
  color:#a33528;
}

/* v1.4.2: centered timer and Chrome/Edge consistency */
.exam-status-row{
  position:relative;
}
.exam-status-left{
  min-width:0;
}
.timer-badge-center{
  position:absolute;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  margin-left:0;
}
#recoverBtn.recover-btn{
  display:block;
  width:100%;
  max-width:none;
  min-width:0;
  box-sizing:border-box;
  align-self:stretch;
  flex:none;
}
button,input,select,textarea{
  box-sizing:border-box;
}
@media(max-width:620px){
  .exam-status-row{
    display:grid;
    grid-template-columns:1fr auto;
    gap:8px 10px;
  }
  .timer-badge-center{
    position:static;
    transform:none;
    grid-column:1/-1;
    grid-row:2;
    justify-self:center;
  }
}