:root {
  --bg: #f6f1e7;
  --paper: #fffdf8;
  --paper-strong: #f7efe1;
  --ink: #233129;
  --muted: #65746d;
  --line: #dccfbf;
  --accent: #a24a2b;
  --accent-deep: #7e341a;
  --green: #2f6a50;
  --green-soft: #e8f3ee;
  --gold: #c08d2f;
  --shadow: 0 18px 42px rgba(59, 43, 22, 0.09);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(192, 141, 47, 0.14), transparent 28%),
    linear-gradient(180deg, #fbf7ef 0%, var(--bg) 100%);
}

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

.page-shell {
  max-width: 1420px;
  margin: 0 auto;
  padding: 28px 20px 36px;
}

.hero,
.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) minmax(280px, 0.9fr);
  gap: 20px;
  padding: 28px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent);
  letter-spacing: 0.08em;
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
}

h1 {
  font-size: clamp(2rem, 4vw, 3rem);
}

.hero-text,
.subtle {
  color: var(--muted);
  line-height: 1.7;
}

.hero-stats {
  display: grid;
  gap: 14px;
}

.hero-stat,
.metric-card {
  padding: 16px 18px;
  border-radius: 20px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
}

.hero-stat span,
.metric-card span {
  display: block;
  color: var(--muted);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.hero-stat strong,
.metric-card strong {
  font-size: 1.15rem;
}

.layout {
  display: grid;
  grid-template-columns: minmax(320px, 380px) minmax(0, 1fr);
  gap: 22px;
}

.sidebar,
.workspace {
  display: grid;
  gap: 18px;
  align-content: start;
}

.panel {
  padding: 22px;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 16px;
}

.badge,
.topic-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 32px;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.82rem;
  font-weight: 800;
  background: #f0e1cd;
  color: var(--accent-deep);
}

.badge.muted {
  background: #eef1ee;
  color: #5d6b64;
}

.field-label {
  display: block;
  margin: 14px 0 8px;
  font-weight: 700;
}

.text-input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: #fffcf7;
  color: var(--ink);
}

.text-input {
  min-height: 48px;
  padding: 10px 14px;
}

textarea {
  min-height: 132px;
  padding: 14px;
  resize: vertical;
  line-height: 1.7;
}

.field-row,
.question-actions,
.feedback-actions,
.action-stack {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.action-stack {
  margin-top: 18px;
}

.btn {
  min-height: 44px;
  padding: 10px 16px;
  border-radius: 14px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 120ms ease, opacity 120ms ease, background 120ms ease;
}

.btn:hover:not(:disabled) {
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #fff9f2;
}

.btn-secondary {
  background: #efe1cf;
  color: var(--accent-deep);
  border-color: #e0c6a8;
}

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

.chapter-picker {
  display: grid;
  gap: 10px;
  max-height: 320px;
  overflow: auto;
  padding-right: 4px;
}

.chapter-chip {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 14px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: #fffaf3;
}

.chapter-chip input {
  margin-top: 4px;
  accent-color: var(--accent);
}

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

.progress-track {
  height: 12px;
  margin-top: 14px;
  border-radius: 999px;
  background: #ece2d6;
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--accent) 0%, var(--gold) 100%);
}

.saved-list {
  display: grid;
  gap: 10px;
  margin-top: 14px;
}

.saved-item {
  padding: 12px 14px;
  border-radius: 16px;
  background: #faf5ed;
  border: 1px solid var(--line);
}

.saved-item strong {
  display: block;
  margin-bottom: 6px;
}

.review-link {
  display: inline-block;
  margin-top: 10px;
  color: var(--green);
  font-weight: 700;
  text-decoration: none;
}

.review-link.hidden,
.hidden {
  display: none !important;
}

.prompt-panel {
  padding-bottom: 18px;
}

.question-panel {
  min-height: 420px;
}

.empty-state {
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--muted);
}

.question-block {
  display: grid;
  gap: 18px;
}

.question-prompt {
  font-size: 1.1rem;
  line-height: 1.8;
}

.options-list,
.parts-list {
  display: grid;
  gap: 12px;
}

.option-card,
.part-card {
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: #fffaf3;
}

.option-card label {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  cursor: pointer;
  line-height: 1.7;
}

.option-card input {
  margin-top: 4px;
  accent-color: var(--accent);
}

.part-card h3 {
  margin-bottom: 8px;
  font-size: 1rem;
}

.part-meta {
  margin-bottom: 10px;
  color: var(--muted);
  font-size: 0.9rem;
}

.feedback-shell {
  display: grid;
  gap: 12px;
  margin-top: 6px;
}

.result-banner {
  padding: 14px 16px;
  border-radius: 18px;
  font-weight: 700;
}

.result-banner.good {
  background: var(--green-soft);
  color: var(--green);
  border: 1px solid #bfdacb;
}

.result-banner.warn {
  background: #f9eee6;
  color: var(--accent-deep);
  border: 1px solid #e9c8b4;
}

.feedback-card {
  padding: 16px;
  border-radius: 20px;
  border: 1px solid var(--line);
  background: var(--paper-strong);
  line-height: 1.8;
  white-space: pre-wrap;
}

.feedback-card strong {
  display: block;
  margin-bottom: 8px;
}

.feedback-card ul {
  margin: 8px 0 0;
  padding-left: 20px;
}

@media (max-width: 980px) {
  .hero,
  .layout {
    grid-template-columns: 1fr;
  }

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