/* 직원 화면 레이아웃 (PC 최적화, 1440×900 기준) */
.app { display: grid; grid-template-columns: var(--sidebar-width) 1fr; min-height: 100vh; }

/* 사이드바 */
.sidebar { background: var(--surface); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 20px 16px; position: sticky; top: 0; height: 100vh; overflow-y: auto; }
.sidebar .logo { padding: 4px 8px 6px; }
.sidebar .role-tag { display: inline-flex; margin: 6px 0 10px 8px; }
.nav-cat { font-size: var(--fs-caption); font-weight: 600; color: var(--text-secondary); padding: 18px 8px 6px; }
.nav-item { display: flex; align-items: center; gap: 10px; min-height: 44px; padding: 0 12px; border-radius: var(--radius-control); color: var(--text-primary); text-decoration: none; font-weight: 500; position: relative; }
.nav-item:hover { background: var(--neutral-soft); }
.nav-item[aria-current="page"] { background: var(--brand-soft); font-weight: 700; }
.nav-item[aria-current="page"]::before { content: ''; position: absolute; left: -16px; top: 8px; bottom: 8px; width: 4px; background: var(--brand); border-radius: 0 2px 2px 0; }
.nav-item .icon { color: var(--text-secondary); }
.nav-item[aria-current="page"] .icon { color: var(--text-primary); }
.nav-item .soon { margin-left: auto; font-size: 12px; color: var(--text-tertiary); font-weight: 500; }
.nav-item .count { margin-left: auto; min-width: 22px; height: 22px; padding: 0 7px; border-radius: 11px; background: var(--brand); color: var(--text-primary); font-size: 12px; font-weight: 700; display: grid; place-items: center; }
.sidebar-foot { margin-top: auto; padding-top: 16px; border-top: 1px solid var(--border); display: flex; align-items: center; gap: 10px; }
.avatar { width: 40px; height: 40px; border-radius: 50%; background: var(--neutral-soft); display: grid; place-items: center; font-weight: 700; flex: none; }
.sidebar-foot .who { line-height: 1.25; min-width: 0; }
.sidebar-foot .who .name { font-weight: 600; }
.sidebar-foot .who .sub { font-size: var(--fs-caption); color: var(--text-secondary); }
.sidebar-foot .icon-btn { margin-left: auto; }

/* 상단바 */
.main { min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px var(--page-gutter) 0; }
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: var(--fs-help); color: var(--text-secondary); min-width: 0; }
.breadcrumb a { color: inherit; text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--text-tertiary); }
.breadcrumb .current { color: var(--text-primary); }
.period { display: flex; align-items: center; gap: 8px; }
.period .select { min-height: 40px; width: auto; font-size: var(--fs-help); font-weight: 600; padding: 6px 32px 6px 12px; }
.topbar .bell { position: relative; }
.topbar .bell .ring { position: absolute; top: 9px; right: 9px; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); border: 1.5px solid var(--surface); }
.topbar .bell .bell-count { position: absolute; top: 2px; right: 2px; min-width: 18px; height: 18px; padding: 0 5px; border-radius: 9px; background: var(--brand); color: var(--text-primary); font-size: 11px; font-weight: 700; display: grid; place-items: center; border: 1.5px solid var(--surface); }
.topbar .bell .bell-count:not(.hidden) + .ring, .topbar .bell .bell-count:not(.hidden) ~ .ring { display: none; }
.noti { color: var(--text-primary); border-radius: var(--radius-control); padding: 12px 8px; }
.noti:hover { background: var(--neutral-soft); }
.noti.seen { opacity: .72; }
.noti-dot { width: 10px; height: 10px; border-radius: 50%; flex: none; margin-top: 6px; background: var(--text-tertiary); }
.noti-dot.danger { background: var(--danger); } .noti-dot.warning { background: var(--warning-icon); } .noti-dot.brand { background: var(--brand); } .noti-dot.neutral { background: var(--text-tertiary); }
.menu-btn { display: none; }

/* 페이지 */
.page { padding: 20px var(--page-gutter) 40px; display: flex; flex-direction: column; gap: 20px; }
.page-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.page-head .desc { color: var(--text-secondary); margin-top: 4px; }
.page-head .actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.page-head .date { color: var(--text-secondary); font-size: var(--fs-help); font-weight: 500; }
.grid-4 { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.grid-2-1 { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); gap: 16px; align-items: start; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; }
.grid-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 16px; }

/* 학급 카드 */
.class-card { display: flex; flex-direction: column; gap: 12px; cursor: pointer; }
.class-card:hover { border-color: var(--border-strong); }
.class-card .title { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.class-card .title h3 { font-size: 18px; }
.class-card .meta { font-size: var(--fs-help); color: var(--text-secondary); display: flex; gap: 6px; flex-wrap: wrap; }
.class-card dl { display: grid; grid-template-columns: auto 1fr; gap: 6px 12px; font-size: var(--fs-help); margin: 0; }
.class-card dt { color: var(--text-secondary); }
.class-card dd { margin: 0; font-weight: 500; }
.class-card .todo { display: flex; gap: 6px; flex-wrap: wrap; }

/* 학급 상세 헤더 */
.class-head h1 { display: inline-flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.class-head .meta { color: var(--text-secondary); margin-top: 6px; display: flex; gap: 10px; flex-wrap: wrap; }
.exam-bar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); flex-wrap: wrap; }
.exam-bar .info { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; font-weight: 600; }
.exam-bar .info .sep { color: var(--text-tertiary); font-weight: 400; }
.exam-bar .info .muted { font-weight: 500; }

/* 제출현황: 표 + 미리보기 */
.submissions { display: grid; grid-template-columns: minmax(0, 2fr) minmax(340px, 1fr); gap: 16px; align-items: start; }
.submissions .table td.strong, .submissions .table .status, .submissions .table .file-ind { white-space: nowrap; }
.submissions .table th, .submissions .table td { padding: 12px 12px; }
.preview-panel { position: sticky; top: 16px; display: flex; flex-direction: column; gap: 12px; }
.preview-panel .head { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.preview-panel .head h2 { display: flex; align-items: center; gap: 8px; }
.viewer { border: 1px solid var(--border); border-radius: var(--radius-control); background: #FAFBFC; overflow: hidden; }
.viewer-bar { display: flex; align-items: center; justify-content: space-between; padding: 6px 8px 6px 14px; border-bottom: 1px solid var(--border); font-size: var(--fs-help); font-weight: 600; background: var(--surface); }
.viewer-bar .tools { display: flex; gap: 2px; }
.viewer-bar .icon-btn { width: 36px; height: 36px; }
.viewer-stage { height: 300px; display: grid; place-items: center; overflow: hidden; background: #EDEFF2; padding: 12px; }
.viewer-stage img { max-width: 100%; max-height: 100%; object-fit: contain; background: #fff; border: 1px solid var(--border); transition: transform .15s; }
.viewer-stage iframe { width: 100%; height: 100%; border: 0; background: #fff; }
.viewer-nav { display: flex; align-items: center; justify-content: center; gap: 12px; padding: 8px; background: var(--surface); border-top: 1px solid var(--border); font-size: var(--fs-help); font-weight: 600; }
.viewer-nav .icon-btn { width: 36px; height: 36px; border: 1px solid var(--border-strong); }
.preview-panel .memo label { font-size: var(--fs-help); font-weight: 600; display: block; margin-bottom: 6px; }
.preview-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
.preview-empty { padding: 32px 16px; text-align: center; color: var(--text-secondary); border: 1px dashed var(--border-strong); border-radius: var(--radius-control); }

/* 결과 표 */
.results-table .progress { margin-left: 10px; }

/* 수합 전용 표 */
.hist { font-size: var(--fs-help); color: var(--text-secondary); }
.hist li { padding: 6px 0; border-bottom: 1px dashed var(--border); }
.hist li:last-child { border-bottom: 0; }

/* 주간 달력 */
.week-grid { display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 12px; }
.week-grid .day { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 12px; min-height: 220px; display: flex; flex-direction: column; gap: 8px; }
.week-grid .day.today { border-color: var(--brand); box-shadow: inset 0 3px 0 var(--brand); }
.week-grid .day header { display: flex; align-items: baseline; justify-content: space-between; gap: 6px; padding-bottom: 8px; border-bottom: 1px solid var(--border); }
.day-items { display: flex; flex-direction: column; gap: 8px; }
.event { display: flex; flex-direction: column; align-items: flex-start; gap: 4px; width: 100%; text-align: left; padding: 10px; border-radius: var(--radius-control); border: 1px solid var(--border); background: var(--surface); color: var(--text-primary); text-decoration: none; font-size: var(--fs-help); }
.event:hover { border-color: var(--border-strong); background: #FAFBFC; }
.event .badge { min-height: 22px; padding: 0 8px; font-size: 12px; }
.event.exam { background: var(--brand-soft); border-color: #F0DE9C; }
.event.recheck { border-color: var(--danger); }
.event.cancelled { opacity: .55; text-decoration: line-through; }
@media (max-width: 1279px) { .week-grid { grid-template-columns: repeat(4, minmax(0, 1fr)); } }
@media (max-width: 1023px) { .week-grid { grid-template-columns: 1fr; } .week-grid .day { min-height: 0; } }

/* 로그인 */
.login-wrap { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(420px, 100%); display: flex; flex-direction: column; gap: 20px; }

/* 반응형 */
@media (max-width: 1279px) {
  .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .submissions { grid-template-columns: 1fr; }
  .preview-panel { position: static; }
}
@media (max-width: 1023px) {
  .app { grid-template-columns: 1fr; }
  .sidebar { position: fixed; left: 0; top: 0; bottom: 0; width: var(--sidebar-width); transform: translateX(-100%); transition: transform .18s; z-index: 40; }
  .sidebar.open { transform: none; box-shadow: 0 0 0 100vw rgba(16, 24, 40, 0.35); }
  .menu-btn { display: inline-grid; }
  .grid-2-1, .grid-3 { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .grid-4 { grid-template-columns: 1fr; }
  .page-head .actions { width: 100%; }
}