@font-face {
  font-family: "Noto Sans Embedded";
  src: url("assets/NotoSans-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans Embedded";
  src: url("assets/NotoSans-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans Embedded";
  src: url("assets/NotoSans-Italic.ttf") format("truetype");
  font-style: italic;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans KR Embedded";
  src: url("assets/NotoSansKR-Regular.ttf") format("truetype");
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: "Noto Sans KR Embedded";
  src: url("assets/NotoSansKR-Bold.ttf") format("truetype");
  font-style: normal;
  font-weight: 700 900;
  font-display: swap;
}

:root {
  color-scheme: light;
  --accent: #c4171d;
  --accent-dark: #941116;
  --accent-soft: #fbeaec;
  --accent-faint: #fff3f4;
  --correct: #1a7a4c;
  --correct-soft: #e8f6ee;
  --ink: #111318;
  --ink-soft: #394150;
  --muted: #6f7785;
  --line: #d9dde5;
  --canvas: #eef0f3;
  --paper: #ffffff;
  --ui-font: "Pretendard Variable", Pretendard, "SUIT Variable", SUIT, "Segoe UI Variable Text", "Segoe UI", "Noto Sans KR Embedded", "Noto Sans KR", "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  --english-font: "Noto Sans Embedded", "Noto Sans", Arial, sans-serif;
  font-family: var(--ui-font);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--canvas);
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background: var(--canvas);
}

button {
  font-family: inherit;
  cursor: pointer;
}

textarea,
input,
select {
  font-family: inherit;
}

mark.wrong-part {
  background: var(--accent-soft);
  color: var(--accent-dark);
  text-decoration: line-through;
  text-decoration-color: var(--accent);
  border-radius: 3px;
  padding: 0 2px;
}

.view {
  padding: 20px 28px 60px;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 28px;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.app-header h1 {
  font-size: 16px;
  margin: 0;
  color: var(--accent-dark);
  white-space: nowrap;
}

.toolbar-spacer {
  flex: 1;
}

#exportPptxBtn {
  padding: 9px 16px;
  border: 1px solid var(--accent);
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}

#exportPptxBtn:disabled {
  opacity: 0.6;
  cursor: default;
}

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.editor-toolbar button {
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  font-size: 13px;
}

.sentence-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 900px;
}

.slide-toggle {
  align-self: center;
  margin: 6px 0;
  padding: 4px 10px;
  border: 1px dashed var(--line);
  border-radius: 12px;
  background: var(--paper);
  color: var(--muted);
  font-size: 12px;
}

.sentence-card {
  display: flex;
  flex-direction: column;
}

.sentence-card-body {
  display: grid;
  grid-template-columns: 32px 1fr 32px;
  gap: 12px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px;
}

.sentence-number {
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  padding-top: 6px;
}

.sentence-fields {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sentence-fields label {
  font-size: 11px;
  color: var(--muted);
  margin-top: 6px;
}

.sentence-fields textarea,
.sentence-fields input {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  resize: vertical;
  min-height: 40px;
}

.field-english {
  font-family: var(--english-font);
}

.sentence-card-controls {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sentence-card-controls button {
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: 6px;
  width: 28px;
  height: 28px;
  font-size: 13px;
}

.add-sentence-bottom {
  margin-top: 16px;
  padding: 12px;
  width: 100%;
  max-width: 900px;
  border: 1px dashed var(--accent);
  border-radius: 10px;
  background: transparent;
  color: var(--accent-dark);
  font-weight: 600;
}

/* Tabs */

.editor-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.editor-tab {
  padding: 10px 4px;
  margin-bottom: -1px;
  border: none;
  border-bottom: 2px solid transparent;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
}

.editor-tab.active {
  color: var(--accent-dark);
  border-bottom-color: var(--accent);
}

/* Grading tab */

.student-switcher {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
}

.student-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.student-chip {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 3px 4px 3px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--paper);
}

.student-chip.active {
  border-color: var(--accent);
  background: var(--accent-faint);
}

.student-chip-name {
  border: none;
  background: transparent;
  padding: 3px 2px;
  font-size: 13px;
  width: 6.5em;
}

.student-chip-remove {
  border: none;
  background: transparent;
  color: var(--muted);
  font-size: 14px;
  line-height: 1;
  width: 20px;
  height: 20px;
  border-radius: 50%;
}

#addStudentBtn {
  padding: 8px 12px;
  border: 1px dashed var(--line);
  border-radius: 6px;
  background: transparent;
  font-size: 13px;
  color: var(--accent-dark);
}

.grading-empty {
  color: var(--muted);
  font-size: 14px;
}

.grading-list {
  display: flex;
  flex-direction: column;
  max-width: 1000px;
}

.grade-row {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(280px, 1.2fr);
  gap: 18px;
  align-items: start;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.grade-row:first-child {
  border-top: none;
}

.grade-ref {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding-top: 2px;
}

.grade-number {
  font-size: 11px;
  font-weight: 700;
  color: var(--accent);
}

.grade-english {
  font-family: var(--english-font);
  font-size: 14px;
  color: var(--ink);
  line-height: 1.4;
}

.grade-model {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.4;
}

.grade-input {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.grade-text {
  width: 100%;
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 14px;
  min-height: 40px;
  resize: vertical;
}

.grade-preview {
  font-size: 12px;
  color: var(--ink-soft);
  min-height: 1em;
}

.grade-comment {
  padding: 6px 8px;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 12px;
}