:root {
  --bg: #f4efe6;
  --panel: rgba(255, 255, 255, 0.84);
  --panel-strong: #ffffff;
  --ink: #18211c;
  --muted: #5f6a63;
  --line: rgba(24, 33, 28, 0.1);
  --forest: #224d35;
  --pine: #2f6f4e;
  --moss: #7c9b55;
  --amber: #b87425;
  --clay: #8f4f3f;
  --card-shadow: 0 22px 50px rgba(35, 36, 28, 0.14);
  font-family: "Georgia", "Times New Roman", serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(47, 111, 78, 0.18), transparent 32%),
    radial-gradient(circle at bottom right, rgba(184, 116, 37, 0.18), transparent 28%),
    linear-gradient(180deg, #f6f0e7 0%, #efe8db 100%);
  color: var(--ink);
}

body {
  position: relative;
  overflow-x: hidden;
}

body,
button,
input,
select {
  font-family: "Trebuchet MS", "Lucida Grande", "Segoe UI", sans-serif;
}

.bg-orb {
  position: fixed;
  inset: auto;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  filter: blur(22px);
  opacity: 0.22;
  pointer-events: none;
  z-index: 0;
}

.bg-orb-a {
  top: -120px;
  right: -100px;
  background: radial-gradient(circle, rgba(47, 111, 78, 0.8), transparent 68%);
}

.bg-orb-b {
  bottom: -120px;
  left: -140px;
  background: radial-gradient(circle, rgba(184, 116, 37, 0.72), transparent 68%);
}

.hero,
.layout {
  position: relative;
  z-index: 1;
}

.hero {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px clamp(16px, 3vw, 32px) 18px;
  align-items: end;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--forest);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  font-size: clamp(34px, 4vw, 60px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  max-width: 100%;
  overflow-wrap: anywhere;
}

.hero-copy {
  max-width: 760px;
  margin: 14px 0 0;
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 18px;
  line-height: 1.5;
  color: var(--muted);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(130px, 1fr));
  gap: 12px;
  min-width: 300px;
}

.hero-stat {
  padding: 14px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid rgba(24, 33, 28, 0.08);
  box-shadow: 0 12px 28px rgba(35, 36, 28, 0.08);
}

.hero-stat span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.hero-stat strong {
  display: block;
  margin-top: 6px;
  font-size: 26px;
  color: var(--ink);
}

.layout {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 16px;
  padding: 8px clamp(16px, 3vw, 32px) 28px;
  align-items: start;
}

body.teacher-open .layout {
  grid-template-columns: 300px minmax(0, 1fr) 380px;
}

body.teacher-closed .layout {
  grid-template-columns: 300px minmax(0, 1fr);
}

.panel {
  border: 1px solid rgba(24, 33, 28, 0.08);
  border-radius: 24px;
  background: var(--panel);
  backdrop-filter: blur(16px);
  box-shadow: var(--card-shadow);
}

.sidebar,
.results,
.detail {
  min-width: 0;
}

.sidebar {
  position: sticky;
  top: 18px;
  padding: 18px;
}

.sidebar-block + .sidebar-block {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.section-title {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.section-title h2,
.results-head h2,
.detail-head h2 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.search-box {
  display: grid;
  gap: 8px;
}

.search-box span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.search-box input,
select {
  width: 100%;
  min-height: 42px;
  padding: 0 14px;
  border: 1px solid rgba(24, 33, 28, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--ink);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.chip,
.secondary,
.icon-button {
  border: 1px solid rgba(24, 33, 28, 0.12);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
}

.chip {
  padding: 9px 12px;
  border-radius: 999px;
}

.chip.active {
  background: linear-gradient(135deg, var(--pine), var(--forest));
  color: #ffffff;
  border-color: transparent;
}

.module-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.module-chip {
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid rgba(24, 33, 28, 0.12);
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink);
  font-size: 13px;
  max-width: 100%;
}

.module-chip.active {
  background: rgba(47, 111, 78, 0.12);
  border-color: rgba(47, 111, 78, 0.3);
}

.results {
  padding: 18px;
}

.results-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 16px;
  margin-bottom: 14px;
}

.results-head p {
  margin: 6px 0 0;
  color: var(--muted);
}

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

.secondary {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 12px;
}

.card-list {
  display: grid;
  gap: 12px;
}

.results-footer {
  display: flex;
  justify-content: center;
  margin-top: 14px;
}

.question-card {
  padding: 16px;
  border-radius: 20px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.95), rgba(250, 247, 241, 0.94));
  border: 1px solid rgba(24, 33, 28, 0.08);
  cursor: pointer;
  transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

.question-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 30px rgba(35, 36, 28, 0.09);
}

.question-card.active {
  border-color: rgba(47, 111, 78, 0.35);
  box-shadow: 0 18px 32px rgba(47, 111, 78, 0.12);
}

.card-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 12px;
  align-items: center;
}

.module-pill,
.source-pill {
  padding: 6px 10px;
  border-radius: 999px;
  font-size: 12px;
}

.module-pill {
  background: rgba(47, 111, 78, 0.1);
  color: var(--forest);
}

.source-pill {
  background: rgba(184, 116, 37, 0.1);
  color: var(--amber);
}

.question-card h3 {
  margin: 0;
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 21px;
  line-height: 1.2;
}

.question-snippet {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.inline-answer {
  display: grid;
  gap: 12px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid rgba(24, 33, 28, 0.08);
}

.inline-section {
  display: grid;
  gap: 6px;
}

.inline-label {
  color: var(--forest);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.inline-text {
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 16px;
  line-height: 1.65;
  color: #25352d;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.detail {
  position: sticky;
  top: 18px;
  padding: 18px;
}

.teacher-side[hidden] {
  display: none;
}

.teacher-side {
  position: sticky;
  top: 18px;
  padding: 18px;
}

.detail-head {
  display: flex;
  justify-content: space-between;
  align-items: start;
  gap: 14px;
}

.detail-nav {
  display: flex;
  gap: 8px;
}

.icon-button {
  width: 40px;
  height: 40px;
  border-radius: 12px;
}

.detail-card {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.teacher-panel {
  margin-top: 16px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(24, 33, 28, 0.08);
}

.teacher-panel-head {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: start;
}

.teacher-panel h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

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

.teacher-form {
  margin-top: 14px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.field input,
.field textarea {
  width: 100%;
  border: 1px solid rgba(24, 33, 28, 0.12);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  padding: 10px 12px;
  resize: vertical;
}

.field input[readonly] {
  background: rgba(242, 240, 235, 0.95);
  color: var(--muted);
}

.field-wide {
  grid-column: 1 / -1;
}

.editor-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.primary,
.danger {
  min-height: 40px;
  padding: 0 14px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.primary {
  background: linear-gradient(135deg, var(--pine), var(--forest));
  color: #ffffff;
}

.danger {
  background: rgba(143, 79, 63, 0.12);
  color: var(--clay);
  border-color: rgba(143, 79, 63, 0.18);
}

.empty-state {
  color: var(--muted);
  line-height: 1.5;
}

.detail-section {
  margin-top: 16px;
  padding: 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(24, 33, 28, 0.08);
}

.detail-section h3 {
  margin: 0 0 8px;
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--forest);
}

.prompt-text,
.response-text {
  margin: 0;
  font-family: "Georgia", "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.65;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.response-text {
  color: #25352d;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.meta-item {
  display: grid;
  gap: 4px;
}

.meta-item span {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.meta-item strong {
  font-size: 14px;
  font-weight: 700;
  overflow-wrap: anywhere;
}

.response-cover {
  margin-top: 12px;
  display: inline-flex;
  gap: 8px;
  align-items: center;
}

.reveal-button {
  padding: 10px 14px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--pine), var(--forest));
  color: #ffffff;
  font-weight: 700;
}

.text-block {
  max-height: 180px;
  overflow: auto;
}

.kbd {
  display: inline-block;
  padding: 2px 6px;
  border-radius: 6px;
  border: 1px solid rgba(24, 33, 28, 0.14);
  background: rgba(255, 255, 255, 0.76);
  font-size: 12px;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 280px minmax(0, 1fr);
  }

  .detail,
  .teacher-side {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .hero {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-stats {
    min-width: 0;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .sidebar,
  .detail,
  .teacher-side {
    position: static;
  }
}

@media (max-width: 600px) {
  .hero {
    padding-top: 20px;
  }

  .hero h1 {
    font-size: 28px;
    line-height: 1.05;
  }

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

  .module-list {
    display: grid;
    grid-template-columns: 1fr;
  }

  .module-chip {
    width: 100%;
    border-radius: 14px;
    text-align: left;
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .results-head {
    flex-direction: column;
    align-items: stretch;
  }

  .results-actions {
    justify-content: stretch;
  }

  .secondary,
  .chip,
  .primary,
  .danger {
    width: 100%;
    justify-content: center;
  }

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