/* =========================================================
   teacher.css
   교사 화면 전용 스타일
========================================================= */

#teacher-login-screen {
  width: min(100%, 400px);
  margin: 72px auto;
  padding: 0 20px;
}

#teacher-login-screen h1 {
  margin: 0 0 6px;
  font-size: 21px !important;
}

#teacher-login-screen > p {
  margin-bottom: 26px !important;
  font-size: 14px !important;
}

#teacher-screen {
  max-width: 1100px;
}

/* 탭 */
.tab-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 22px;
}

.tab {
  min-height: 40px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
}

.tab.active {
  border-color: var(--ink);
  background: var(--ink);
  color: #fff;
}

/* 표 */
#teacher-screen table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

#teacher-screen th {
  padding: 11px 12px;
  border-bottom: 2px solid var(--line);
  background: #f5f5f5;
  font-weight: 700;
  text-align: left;
  white-space: nowrap;
}

#teacher-screen td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

#teacher-screen tr:hover td {
  background: #fafafa;
}

.answer-cell {
  max-width: 280px;
  color: #333;
  white-space: pre-wrap;
  word-break: break-word;
}

.score-input {
  width: 66px;
  padding: 6px 8px;
  text-align: center;
}

.feedback-input {
  width: 100%;
  min-width: 150px;
  padding: 7px 9px;
  font-size: 13px;
}

.save-btn {
  min-height: 34px;
  padding: 6px 13px;
  border: 0;
  border-radius: 6px;
  background: var(--writing);
  color: #fff;
  font-size: 12px;
  font-weight: 650;
  white-space: nowrap;
  cursor: pointer;
}

.download-btn {
  min-height: 46px;
  padding: 11px 20px;
  border: 0;
  border-radius: 8px;
  background: var(--comp);
  color: #fff;
  font-size: 14px;
  font-weight: 650;
  cursor: pointer;
}

/* 회차 현황 */
.round-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 9px;
  padding: 13px 16px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: #fff;
  cursor: pointer;
}

.round-row:hover {
  border-color: #aaa;
}

.progress-bar {
  flex: 1;
  height: 7px;
  overflow: hidden;
  border-radius: 999px;
  background: #eee;
}

.progress-fill {
  height: 100%;
  border-radius: inherit;
  background: var(--comp);
}

.sub-count {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}

/* 반 관리 */
.class-card {
  margin-bottom: 16px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
}

.class-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 13px 16px;
  background: #f5f5f5;
}

.class-card-head h3 {
  margin: 0;
  font-size: 15px;
}

.class-card-body {
  padding: 16px;
}

.student-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.student-row:last-child {
  border-bottom: 0;
}

.del-btn {
  padding: 4px 7px;
  border: 0;
  background: none;
  color: var(--danger);
  font-size: 13px;
  cursor: pointer;
}

/* 일정 */
.sched-table {
  font-size: 13px;
}

.sched-table input[type="datetime-local"] {
  width: auto;
  min-width: 170px;
  padding: 7px 9px;
  font-size: 13px;
}

/* 필터 */
.class-filter {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 9px;
  margin-bottom: 17px;
}

.class-filter label {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.class-filter select {
  width: auto;
  min-width: 120px;
  padding: 8px 12px;
  font-size: 13px;
}

/* 모바일 교사 화면 */
@media (max-width: 720px) {
  #teacher-screen {
    padding: 16px;
  }

  .tab-bar {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .tab {
    width: 100%;
    padding: 9px 8px;
  }

  #teacher-screen table {
    min-width: 760px;
  }

  #submissionTable,
  #scheduleTable {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .round-row {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .progress-bar {
    flex-basis: 100%;
    order: 3;
  }
}