:root {
  color-scheme: light;
  --bg: #f3efe4;
  --bg-2: #e6ded1;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: #ffffff;
  --text: #1f2328;
  --muted: #5c626d;
  --border: rgba(31, 35, 40, 0.12);
  --accent: #a64a22;
  --accent-2: #2d6a4f;
  --accent-3: #334e68;
  --danger: #c2410c;
  --success: #0f766e;
  --shadow: 0 18px 50px rgba(44, 31, 18, 0.13);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: Georgia, "Times New Roman", serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(166, 74, 34, 0.16), transparent 30%),
    radial-gradient(circle at top right, rgba(45, 106, 79, 0.12), transparent 26%),
    linear-gradient(180deg, var(--bg), var(--bg-2));
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  padding: 0.75rem 0.9rem;
  outline: none;
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

input:focus,
select:focus,
textarea:focus {
  border-color: rgba(166, 74, 34, 0.55);
  box-shadow: 0 0 0 4px rgba(166, 74, 34, 0.12);
}

textarea {
  resize: vertical;
  min-height: 96px;
}

.page-shell {
  width: min(1320px, calc(100vw - 32px));
  margin: 18px auto 28px;
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.88), rgba(255, 249, 239, 0.72));
  box-shadow: var(--shadow);
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto -160px -180px auto;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(166, 74, 34, 0.18), transparent 65%);
  pointer-events: none;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.34rem 0.7rem;
  border-radius: 999px;
  border: 1px solid rgba(166, 74, 34, 0.2);
  color: var(--accent);
  background: rgba(255, 255, 255, 0.68);
  letter-spacing: 0.04em;
  font-size: 0.78rem;
  text-transform: uppercase;
}

.hero h1 {
  margin: 14px 0 8px;
  font-size: clamp(2rem, 3.2vw, 3.5rem);
  line-height: 1.04;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0;
  color: var(--muted);
  max-width: 76ch;
  line-height: 1.65;
}

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

.toolbar .spacer {
  flex: 1 1 auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: 1px solid transparent;
  border-radius: 14px;
  padding: 0.75rem 1rem;
  font-weight: 700;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 18px rgba(0, 0, 0, 0.08);
}

.btn-primary {
  background: linear-gradient(135deg, #b35a2b, #8f3f18);
  color: #fff;
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.84);
  color: var(--text);
  border-color: var(--border);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border-color: var(--border);
}

.btn-danger {
  background: #fff4ef;
  color: var(--danger);
  border-color: rgba(194, 65, 12, 0.18);
}

.layout {
  display: grid;
  grid-template-columns: 320px minmax(0, 1fr);
  gap: 18px;
  margin-top: 18px;
  align-items: start;
}

.panel {
  border: 1px solid var(--border);
  border-radius: 24px;
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.panel-header {
  padding: 18px 18px 0;
}

.panel-body {
  padding: 18px;
}

.panel-title {
  margin: 0 0 4px;
  font-size: 1.15rem;
}

.panel-subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.stack {
  display: grid;
  gap: 14px;
}

.session-list {
  display: grid;
  gap: 10px;
}

.session-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.78);
}

.session-item.active {
  border-color: rgba(166, 74, 34, 0.35);
  box-shadow: 0 10px 20px rgba(166, 74, 34, 0.08);
}

.session-item .session-name {
  flex: 1 1 auto;
  font-weight: 700;
}

.session-item .session-meta {
  color: var(--muted);
  font-size: 0.82rem;
}

.session-item .mini-actions {
  display: flex;
  gap: 6px;
}

.icon-btn {
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.92);
  border-radius: 12px;
  width: 38px;
  height: 38px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.stat {
  padding: 14px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid var(--border);
}

.stat .value {
  display: block;
  font-size: 1.45rem;
  font-weight: 800;
  line-height: 1;
}

.stat .label {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 0.86rem;
}

.question-list {
  display: grid;
  gap: 14px;
}

.question-card {
  border-radius: 22px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.84);
  box-shadow: 0 10px 24px rgba(31, 35, 40, 0.05);
  overflow: hidden;
}

.question-card.empty {
  border-style: dashed;
  opacity: 0.84;
}

.question-head {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: space-between;
  align-items: center;
  padding: 16px 18px 0;
}

.question-id {
  font-weight: 800;
  color: var(--accent-3);
}

.question-type {
  padding: 0.35rem 0.62rem;
  border-radius: 999px;
  font-size: 0.82rem;
  background: rgba(45, 106, 79, 0.12);
  color: var(--accent-2);
}

.question-body {
  padding: 10px 18px 18px;
  display: grid;
  gap: 14px;
}

.question-text {
  margin: 0;
  line-height: 1.72;
  white-space: pre-wrap;
}

.option-grid {
  display: grid;
  gap: 10px;
  justify-items: start;
}

.option-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  justify-content: flex-start;
  width: fit-content;
  min-width: min(100%, 280px);
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(31, 35, 40, 0.09);
  background: rgba(255, 255, 255, 0.72);
}

.option-item.selected {
  border-color: rgba(166, 74, 34, 0.28);
  background: rgba(255, 243, 234, 0.86);
}

.option-key {
  min-width: 1.9rem;
  font-weight: 900;
  color: var(--accent);
}

.option-content {
  flex: 1 1 auto;
  text-align: left;
  word-break: break-word;
}

.answer-row {
  display: grid;
  gap: 10px;
}

.answer-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.answer-tools .btn {
  padding: 0.58rem 0.82rem;
  border-radius: 12px;
}

.answer-input {
  display: grid;
  gap: 8px;
}

.status-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.6rem;
  border-radius: 999px;
  font-size: 0.8rem;
  border: 1px solid transparent;
}

.badge-muted {
  background: rgba(92, 98, 109, 0.12);
  color: var(--muted);
  border-color: rgba(92, 98, 109, 0.12);
}

.badge-success {
  background: rgba(15, 118, 110, 0.1);
  color: var(--success);
  border-color: rgba(15, 118, 110, 0.16);
}

.badge-danger {
  background: rgba(194, 65, 12, 0.09);
  color: var(--danger);
  border-color: rgba(194, 65, 12, 0.15);
}

.hidden {
  display: none !important;
}

.helper {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.answer-preview {
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(247, 244, 239, 0.9);
  color: var(--text);
  white-space: pre-wrap;
}

.teacher-grid {
  display: grid;
  gap: 16px;
}

.teacher-status {
  margin-top: 12px;
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(45, 106, 79, 0.16);
  background: rgba(245, 251, 248, 0.94);
  color: var(--accent-2);
}

.teacher-pager {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.teacher-pager .pager-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.teacher-pager .pager-info {
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.82);
  color: var(--muted);
}

.teacher-question-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.teacher-card {
  padding: 12px;
}

.teacher-card .card-top {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}

.teacher-card .field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.teacher-card .field-block {
  display: grid;
  gap: 6px;
}

.teacher-card .options-wrap {
  display: grid;
  gap: 10px;
}

.answer-picker {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.answer-choice {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0.65rem 0.85rem;
  border-radius: 14px;
  border: 1px solid rgba(31, 35, 40, 0.14);
  background: rgba(255, 255, 255, 0.9);
  color: var(--text);
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
}

.answer-choice:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(31, 35, 40, 0.08);
}

.answer-choice.selected {
  border-color: rgba(15, 118, 110, 0.35);
  background: rgba(236, 253, 245, 0.96);
  color: var(--success);
}

.answer-box {
  width: 18px;
  height: 18px;
  border-radius: 5px;
  border: 2px solid currentColor;
  background: transparent;
  position: relative;
  flex: 0 0 auto;
}

.answer-choice.selected .answer-box::after {
  content: "";
  position: absolute;
  inset: 3px;
  border-radius: 2px;
  background: currentColor;
}

.answer-label {
  font-weight: 700;
}

.teacher-card textarea {
  min-height: 72px;
}

.teacher-card input,
.teacher-card select,
.teacher-card textarea {
  border-radius: 12px;
  padding: 0.6rem 0.75rem;
}

.teacher-card .helper {
  font-size: 0.82rem;
}

.option-editor {
  display: grid;
  grid-template-columns: 80px minmax(0, 1fr) 42px;
  gap: 8px;
  align-items: center;
}

.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.notice {
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid rgba(166, 74, 34, 0.18);
  background: rgba(255, 249, 242, 0.96);
  color: var(--accent);
}

@media (max-width: 1080px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .teacher-question-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .teacher-card .field-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 860px) {
  .teacher-question-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .page-shell {
    width: min(100vw - 18px, 1320px);
    margin: 9px auto 18px;
  }

  .hero,
  .panel {
    border-radius: 20px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .option-editor {
    grid-template-columns: 74px minmax(0, 1fr);
  }

  .teacher-question-grid {
    grid-template-columns: 1fr;
  }

  .teacher-card .field-grid {
    grid-template-columns: 1fr;
  }
}

body.student-page {
  background: #ffffff;
  color: #121212;
}

body.student-page .page-shell,
body.student-page .student-page-shell {
  width: min(1480px, calc(100vw - 28px));
  margin: 14px auto 22px;
}

body.student-page .hero,
body.student-page .panel {
  background: #fff;
  border: none;
  box-shadow: none;
  backdrop-filter: none;
}

body.student-page .hero {
  padding: 10px 0 18px;
}

body.student-page .hero::after {
  display: none;
}

body.student-page .eyebrow {
  border-color: #e7e7e7;
  color: #666;
  background: #fff;
}

body.student-page .hero h1 {
  font-size: clamp(1.85rem, 2.8vw, 3rem);
}

body.student-page .toolbar,
body.student-page .student-actions {
  margin-top: 16px;
}

body.student-page .student-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

body.student-page .toolbar-select {
  width: auto;
  min-width: 150px;
  padding: 0.72rem 0.85rem;
  border-radius: 14px;
  border: 1px solid #e6e6e6;
  background: #fff;
}

body.student-page .btn-primary {
  background: #111;
  color: #fff;
}

body.student-page .btn-secondary,
body.student-page .btn-ghost {
  background: #fff;
  border-color: #e6e6e6;
  color: #222;
}

body.student-page .student-notice,
body.student-page .score-strip,
body.student-page .tile-strip,
body.student-page .save-strip {
  background: #fff;
  border: 1px solid #ececec;
  box-shadow: none;
  border-radius: 18px;
}

body.student-page .student-layout {
  display: grid;
  grid-template-columns: 312px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  margin-top: 18px;
}

body.student-page .student-sidebar {
  display: grid;
  gap: 14px;
  position: sticky;
  top: 12px;
  width: 312px;
  min-width: 312px;
}

body.student-page .score-strip,
body.student-page .tile-strip,
body.student-page .save-strip {
  padding: 12px;
  width: 100%;
  min-width: 0;
}

body.student-page .score-kicker,
body.student-page .main-kicker,
body.student-page .save-strip-head {
  color: #666;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

body.student-page .score-value {
  font-size: 2.6rem;
  line-height: 1;
  font-weight: 800;
}

body.student-page .score-meta,
body.student-page .score-caption,
body.student-page .main-meta {
  color: #666;
  font-size: 0.92rem;
}

body.student-page .score-bar {
  margin: 12px 0 8px;
  height: 8px;
  border-radius: 999px;
  background: #f0f0f0;
  overflow: hidden;
}

body.student-page .score-bar span {
  display: block;
  height: 100%;
  width: 0%;
  background: #111;
  border-radius: inherit;
}

body.student-page .tile-strip-head,
body.student-page .student-main-head {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  align-items: baseline;
  margin-bottom: 12px;
}

body.student-page .question-tiles {
  display: grid;
  grid-template-columns: repeat(10, minmax(0, 1fr));
  gap: 6px;
  width: 100%;
  min-width: 0;
  max-height: calc((100vh - 330px) * 0.4444);
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 4px;
}

body.student-page .tile {
  position: relative;
  aspect-ratio: 1 / 1;
  min-width: 0;
  padding: 0;
  border: 1px solid #e2e2e2;
  background: #fff;
  border-radius: 6px;
  color: transparent;
  font-size: 0;
  line-height: 1;
  overflow: visible;
}

body.student-page .tile-tooltip {
  position: absolute;
  left: 50%;
  top: -10px;
  transform: translate(-50%, -100%) scale(0.96);
  padding: 0.28rem 0.44rem;
  min-width: 1.5rem;
  border-radius: 999px;
  background: rgba(17, 17, 17, 0.92);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.14s ease, transform 0.14s ease;
  z-index: 3;
}

body.student-page .tile:hover .tile-tooltip,
body.student-page .tile:focus-visible .tile-tooltip {
  opacity: 1;
  transform: translate(-50%, -100%) scale(1);
}

body.student-page .tile.correct {
  background: #e7f7ec;
  border-color: #a8deb8;
  color: #16794c;
}

body.student-page .tile.wrong {
  background: #fdecec;
  border-color: #f3b3b3;
  color: #be2f2f;
}

body.student-page .tile.answered {
  background: #eef4ff;
  border-color: #bfd0ff;
  color: #2d5be3;
}

body.student-page .student-main {
  background: #fff;
}

body.student-page .student-main-head {
  padding: 2px 0 10px;
  border-bottom: 1px solid #f0f0f0;
  margin-bottom: 14px;
}

body.student-page .student-question-list {
  display: grid;
  gap: 14px;
}

body.student-page .student-question {
  padding: 0 0 14px;
  border-bottom: 1px solid #f0f0f0;
  background: transparent;
}

body.student-page .student-question.jump-highlight {
  background: #fafafa;
  border-radius: 14px;
  box-shadow: 0 0 0 1px #ececec inset;
}

body.student-page .student-question:last-child {
  border-bottom: none;
}

body.student-page .student-question .question-head,
body.student-page .student-question .question-body {
  padding-left: 0;
  padding-right: 0;
}

body.student-page .student-question .question-card,
body.student-page .student-question .answer-preview {
  border: none;
  background: transparent;
  box-shadow: none;
}

body.student-page .student-question .option-item {
  background: #fff;
}

body.student-page .student-question .option-item.selected {
  background: #f7f7f7;
  border-color: #d8d8d8;
  color: #111;
}

body.student-page .student-question .option-item.selected .option-key {
  color: #111;
}

body.student-page .student-question .option-item .option-content {
  text-align: left;
}

body.student-page .review-modal {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.74);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 18px;
  z-index: 50;
}

body.student-page .review-modal.hidden {
  display: none !important;
}

body.student-page .review-modal-card {
  width: min(560px, 100%);
  border: 1px solid #ececec;
  border-radius: 22px;
  background: #fff;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.08);
  padding: 20px;
}

body.student-page .review-modal-card h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
}

body.student-page .review-modal-card p {
  margin: 0;
  color: #666;
  line-height: 1.65;
}

body.student-page .review-modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

body.student-page .review-modal-actions .btn {
  flex: 1 1 0;
}

body.student-page .session-select {
  width: 100%;
  margin-bottom: 10px;
}

body.student-page .save-strip-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

body.student-page .save-strip-body {
  display: grid;
  gap: 8px;
}

body.student-page .save-strip-groups {
  display: grid;
  gap: 8px;
}

body.student-page .save-group {
  display: grid;
  gap: 6px;
}

body.student-page .save-group-title {
  color: #666;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

body.student-page .save-group-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

body.student-page .save-group-actions .btn {
  flex: 1 1 auto;
  padding: 0.6rem 0.8rem;
  border-radius: 14px;
  min-height: 48px;
}

body.student-page .save-group-actions .btn:last-child:nth-child(3) {
  grid-column: 1 / -1;
}

body.student-page .session-select {
  margin-bottom: 4px;
  padding-top: 0.65rem;
  padding-bottom: 0.65rem;
}

@media (max-width: 1100px) {
  body.student-page .student-layout {
    grid-template-columns: 1fr;
  }

  body.student-page .student-sidebar {
    position: static;
    width: 100%;
    min-width: 0;
  }

  body.student-page .question-tiles {
    max-height: none;
  }
}