:root{--navy:#10263b;--navy2:#173d5b;--green:#26725b;--green-soft:#eaf5ef;--bg:#f3f6f7;--line:#dbe4e8;--ink:#1b2d37;--muted:#71818a;--white:#fff;--gray:#eef1f2;--red:#a83a3a}
*{box-sizing:border-box}body{margin:0;background:var(--bg);font-family:"Noto Sans KR","Malgun Gothic",sans-serif;color:var(--ink)}button,input,select{font:inherit}.hidden{display:none!important}
.topbar{height:66px;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 34px}.brand{display:flex;gap:12px;align-items:center;color:#fff;text-decoration:none}.mark{width:34px;height:34px;border:1px solid #ffffff80;border-radius:50%;display:grid;place-items:center;font-weight:900}.brand small{display:block;font-size:10px;letter-spacing:.15em;opacity:.6;margin-top:2px}.user-area{display:flex;align-items:center;gap:10px;font-size:12px;color:#d8e2e8}.logout{border:1px solid #ffffff55;background:transparent;color:#fff;border-radius:8px;padding:7px 9px;cursor:pointer}
main{max-width:1280px;margin:28px auto 70px;padding:0 22px}.center{min-height:45vh;display:grid;place-content:center;color:var(--muted)}.eyebrow{font-size:10px;letter-spacing:.14em;color:var(--green);font-weight:900}
.login-card{width:min(430px,calc(100% - 36px));margin:70px auto;background:#fff;padding:34px;border:1px solid var(--line);border-radius:18px}.login-card h1{margin:7px 0 22px}.login-card label{display:grid;gap:6px;font-weight:800;margin:13px 0}.login-card input{padding:12px;border:1px solid #bdcbd2;border-radius:9px}.message{color:var(--red);font-size:13px}
.hero{display:flex;justify-content:space-between;align-items:flex-end;margin-bottom:20px}.hero h1{font-size:31px;margin:7px 0}.hero p{margin:0;color:var(--muted)}.hero-actions{display:flex;gap:8px}.btn{border:1px solid #b9c8d0;background:#fff;color:var(--navy2);padding:10px 14px;border-radius:9px;font-weight:850;font-size:13px;cursor:pointer}.btn.primary{background:var(--navy2);color:#fff;border-color:var(--navy2)}.notice{margin:-5px 0 16px;padding:12px 14px;border-radius:9px;background:#e9f5ef;color:#275f50}.notice.error{background:#fff0f0;color:#a23a3a}
.quick{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:24px}.quick-card{border:1px solid var(--line);background:#fff;border-radius:14px;padding:18px;display:flex;justify-content:space-between;align-items:center;text-align:left;cursor:pointer;color:inherit}.quick-card:hover{border-color:#9eb6c1;box-shadow:0 4px 14px #173d5b0c}.quick-card h3{margin:5px 0;font-size:17px}.quick-card p{margin:0;color:var(--muted);font-size:12px}.quick-icon{width:42px;height:42px;border-radius:12px;background:var(--green-soft);display:grid;place-items:center;color:var(--green);font-weight:900;font-size:21px}
.action-panel{background:#fff;border:1px solid #bcd0d8;border-radius:14px;padding:18px;margin:-8px 0 24px;box-shadow:0 10px 25px #173d5b0a}.action-head{display:flex;justify-content:space-between;align-items:flex-start;margin-bottom:14px}.action-head h2{margin:5px 0}.panel-close{border:0;background:transparent;color:#687b85;cursor:pointer;padding:7px}.cohort-form{display:grid;grid-template-columns:1.4fr 1.1fr 1fr 1fr auto;gap:9px;align-items:end}.cohort-form label,.student-upload label{display:grid;gap:6px;font-size:12px;font-weight:850}.cohort-form input,.cohort-form select,.student-upload select{width:100%;padding:10px;border:1px solid #bdcbd2;border-radius:8px}.student-upload{display:grid;grid-template-columns:1fr 1.5fr;gap:10px}.file-box{border:1px dashed #9caeb7;border-radius:9px;padding:10px}.file-box input{display:block;margin-top:6px}.help{font-size:12px;color:var(--muted);line-height:1.55}.preview-head{display:flex;justify-content:space-between;align-items:center;margin:15px 0 8px}.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:9px}table{width:100%;border-collapse:collapse;min-width:720px}th,td{padding:9px 10px;border-bottom:1px solid #e8edef;text-align:left;font-size:12px}th{background:#f5f7f8}.invalid{color:var(--red);font-weight:900}
.section-head{display:flex;justify-content:space-between;align-items:flex-end;margin:4px 0 10px}.section-head h2{font-size:21px;margin:5px 0}.section-head span{font-size:11px;color:var(--muted)}
.cohort-layout{display:grid;grid-template-columns:minmax(430px,1.08fr) minmax(340px,.92fr);gap:14px}.list-panel,.detail-panel{background:#fff;border:1px solid var(--line);border-radius:15px;padding:15px}.cohort-list{display:grid;gap:8px}.cohort-row{display:grid;grid-template-columns:1fr auto;gap:12px;align-items:center;padding:15px;border:1px solid #dce5e9;border-radius:11px;background:#fff;cursor:pointer;text-align:left;color:inherit}.cohort-row.selected{border:2px solid var(--navy2);background:#f8fbfd}.cohort-row h3{font-size:16px;margin:0 0 5px}.cohort-row p{font-size:12px;color:var(--muted);margin:0}.chips{display:flex;gap:5px;flex-wrap:wrap;margin-top:9px}.chip{padding:4px 7px;border-radius:999px;background:#edf3f5;font-size:10px;font-weight:800;color:#516671}.chip.active{background:#e6f4eb;color:#287052}.chip.closed{background:#e9eaea;color:#7c888d}.arrow{font-size:22px;color:#78909d}.empty-state,.empty-detail{padding:40px 20px;text-align:center;color:var(--muted)}
.detail-title span{font-size:10px;letter-spacing:.12em;color:var(--green);font-weight:900}.detail-title h2{font-size:25px;margin:7px 0}.detail-title p{margin:0;color:var(--muted);font-size:13px}.stat-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:16px 0}.stat{padding:12px;border-radius:10px;background:#f5f8f9}.stat small{display:block;color:var(--muted);font-size:10px}.stat strong{display:block;margin-top:4px}.detail-actions{display:grid;grid-template-columns:1fr 1fr 1fr;gap:7px;margin-top:14px}.action{padding:13px 8px;text-align:center;border:1px solid var(--line);border-radius:10px;background:#fff;text-decoration:none;color:inherit}.action strong{display:block;font-size:13px}.action span{font-size:10px;color:var(--muted)}.action.live{background:var(--navy2);color:#fff}.action.live span{color:#d1dde5}.action.analytics{background:#f1f8f5;border-color:#b8d9cc}.note{margin-top:16px;padding:12px 14px;border-left:4px solid var(--green);background:#edf6f2;border-radius:7px;font-size:12px;line-height:1.6;color:#48615a}
.archive{margin-top:22px}.archive-bar{width:100%;display:flex;justify-content:space-between;align-items:center;background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;cursor:pointer}.archive-bar strong{font-size:14px}.archive-bar span{font-size:12px;color:var(--muted)}.archive-list{display:grid;gap:6px;padding:10px 4px}.archived-row{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border:1px solid #e2e6e8;border-radius:9px;background:#f4f5f5;color:#78858b}.archived-row strong{font-size:13px}.archived-row span{font-size:11px}
.migration{margin-top:18px;padding:15px 16px;border-radius:12px;background:#fff;border:1px solid var(--line);display:flex;justify-content:space-between;align-items:center}.migration p{margin:4px 0 0;color:var(--muted);font-size:12px}
@media(max-width:900px){.cohort-form{grid-template-columns:1fr 1fr}.cohort-layout{grid-template-columns:1fr}.detail-panel{position:static}.student-upload{grid-template-columns:1fr}}@media(max-width:700px){.hero{display:block}.hero-actions{margin-top:14px}.quick{grid-template-columns:1fr}.cohort-form{grid-template-columns:1fr}.detail-actions{grid-template-columns:1fr}.topbar{padding:0 14px}.user-area>span{display:none}.stat-grid{grid-template-columns:1fr 1fr}}

/* V17.6.2 고령 관리자 가독성 강화 */
body{
  font-size:17px;
  line-height:1.55;
}
.topbar{
  height:74px;
}
.brand strong{
  font-size:18px;
}
.brand small{
  font-size:12px;
  letter-spacing:.11em;
}
.mark{
  width:40px;
  height:40px;
  font-size:17px;
}
.user-area{
  font-size:14px;
}
.logout{
  min-height:42px;
  padding:9px 13px;
  font-size:14px;
}
main{
  max-width:1360px;
}
.eyebrow{
  font-size:12px;
  letter-spacing:.11em;
}
.hero h1{
  font-size:36px;
}
.hero p{
  font-size:16px;
  line-height:1.65;
}
.btn{
  min-height:46px;
  padding:11px 16px;
  font-size:15px;
}
.quick-card{
  padding:22px;
  min-height:132px;
}
.quick-card h3{
  font-size:21px;
  margin:7px 0;
}
.quick-card p{
  font-size:15px;
  line-height:1.55;
}
.quick-icon{
  width:48px;
  height:48px;
  font-size:24px;
}
.action-head h2{
  font-size:25px;
}
.cohort-form label,
.student-upload label,
.login-card label{
  font-size:15px;
}
.cohort-form input,
.cohort-form select,
.student-upload select,
.login-card input{
  min-height:47px;
  font-size:16px;
}
.file-box{
  font-size:15px;
}
.help{
  font-size:14px;
}
.preview-head{
  font-size:16px;
}
th,td{
  font-size:14px;
  padding:11px 12px;
}
.section-head h2{
  font-size:26px;
}
.section-head span{
  font-size:13px;
}
.cohort-row{
  padding:18px 17px;
  min-height:108px;
}
.cohort-row h3{
  font-size:20px;
  margin-bottom:8px;
}
.cohort-row p{
  font-size:15px;
  line-height:1.45;
}
.chip{
  font-size:12px;
  padding:5px 8px;
}
.arrow{
  font-size:28px;
}
.detail-title span{
  font-size:12px;
}
.detail-title h2{
  font-size:30px;
}
.detail-title p{
  font-size:15px;
  line-height:1.55;
}
.stat{
  padding:15px;
}
.stat small{
  font-size:13px;
}
.stat strong{
  font-size:17px;
}
.action{
  min-height:82px;
  padding:15px 9px;
}
.action strong{
  font-size:16px;
}
.action span{
  font-size:12px;
  line-height:1.4;
}
.note{
  font-size:14px;
  line-height:1.7;
  padding:14px 16px;
}
.archive-bar{
  min-height:54px;
  padding:15px 17px;
}
.archive-bar strong{
  font-size:16px;
}
.archive-bar span{
  font-size:14px;
}
.archived-row{
  padding:14px 16px;
}
.archived-row strong{
  font-size:15px;
}
.archived-row span{
  font-size:13px;
}
.migration strong{
  font-size:16px;
}
.migration p{
  font-size:14px;
}
.notice{
  font-size:15px;
}
.login-card h1{
  font-size:30px;
}
.login-card{
  width:min(480px,calc(100% - 36px));
}

@media(max-width:900px){
  body{font-size:16px}
  .hero h1{font-size:32px}
  .cohort-row h3{font-size:19px}
}
@media(max-width:700px){
  body{font-size:16px}
  .hero h1{font-size:30px}
  .quick-card h3{font-size:20px}
  .detail-title h2{font-size:27px}
  .cohort-row{min-height:auto}
}


/* V17.8.2 등록 화면: 스크롤 이동 대신 중앙 집중형 모달 */
body.modal-open{overflow:hidden}
.modal-panel{
  position:fixed;
  z-index:1000;
  left:50%;
  top:50%;
  transform:translate(-50%,-50%);
  width:min(980px,calc(100vw - 36px));
  max-height:calc(100vh - 48px);
  overflow:auto;
  margin:0;
  padding:26px;
  border:1px solid #aac0ca;
  border-radius:18px;
  box-shadow:0 0 0 100vmax rgba(13,31,45,.52),0 24px 70px rgba(10,31,47,.28);
}
#cohort-panel.modal-panel{width:min(1040px,calc(100vw - 36px))}
#student-panel.modal-panel{width:min(1060px,calc(100vw - 36px))}
.modal-panel .action-head{
  position:sticky;
  top:-26px;
  z-index:2;
  background:#fff;
  padding:24px 0 14px;
  margin-top:-24px;
}
.modal-panel .action-head h2{font-size:30px}
.modal-panel .panel-close{
  min-height:46px;
  padding:9px 13px;
  border:1px solid var(--line);
  border-radius:9px;
  background:#f6f8f9;
  font-size:15px;
  font-weight:850;
}
@media(max-width:900px){
  .modal-panel{width:calc(100vw - 24px);max-height:calc(100vh - 24px);padding:20px}
  .modal-panel .action-head{top:-20px;padding-top:19px;margin-top:-18px}
}

/* V18 중앙관리자 진입 시 추가 도구 */
.user-area{display:flex;align-items:center;gap:14px}
#academy-user{display:flex;align-items:center;gap:12px}
.central-back{color:#225f84;text-decoration:none;font-weight:850}
.central-back:hover{text-decoration:underline}
.central-tool-panel{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  margin:0 0 24px;
  padding:22px 24px;
  border:1px solid #e3cf8d;
  border-radius:16px;
  background:#fff9e8;
}
.central-tool-panel h2{margin:4px 0 7px;font-size:22px}
.central-tool-panel p{margin:0;color:#6e674d;line-height:1.6}
.central-tool-button{min-width:190px;min-height:50px;background:#fff;border-color:#cdb66d;color:#6f5514}
@media(max-width:800px){.central-tool-panel{align-items:stretch;flex-direction:column}.central-tool-button{width:100%}}

.central-home-button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:0 18px;border:1px solid #b9cbd7;border-radius:10px;
  background:#fff;color:#1f5273;text-decoration:none;font-weight:850;
}
.hero{display:flex;align-items:center;justify-content:space-between;gap:18px}
@media(max-width:700px){.hero{align-items:stretch;flex-direction:column}.central-home-button{width:100%}}

.archived-row{gap:14px}
.archive-finalize{min-width:112px;min-height:42px;white-space:nowrap}
.archive-finalize.completed{background:#eef6f1;color:#2d7357;border-color:#c7ddcf}
@media(max-width:760px){.archived-row{grid-template-columns:1fr}.archive-finalize{width:100%}}