/* Hallmark · pre-emit critique: P4 H4 E4 S4 R4 V4 */
:root {
  --font-ui: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --color-ink: #20231f;
  --color-muted: #687065;
  --color-soft: #f5f6f1;
  --color-paper: #fbfbf7;
  --color-line: #d8ddd2;
  --color-panel: #ffffff;
  --color-accent: #2f6f5e;
  --color-accent-strong: #184a3f;
  --color-accent-soft: #e4f0eb;
  --color-warn: #9a5b14;
  --color-warn-soft: #fff2db;
  --color-danger: #a84133;
  --color-danger-soft: #fae7e3;
  --color-good: #287348;
  --color-good-soft: #e5f2e9;
  --shadow-panel: 0 18px 50px rgba(26, 38, 32, 0.08);
  --radius: 8px;
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
}

* {
  box-sizing: border-box;
}

html,
body {
  min-height: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--color-ink);
  background:
    linear-gradient(90deg, rgba(47, 111, 94, 0.05) 1px, transparent 1px),
    linear-gradient(180deg, rgba(47, 111, 94, 0.05) 1px, transparent 1px),
    var(--color-soft);
  background-size: 28px 28px;
}

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

button {
  cursor: pointer;
}

.app-shell {
  width: min(1440px, 100%);
  margin: 0 auto;
  padding: var(--space-5);
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-5);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 0;
}

.brand-logo {
  width: clamp(56px, 8vw, 86px);
  height: clamp(56px, 8vw, 86px);
  flex: 0 0 auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-panel);
  object-fit: contain;
  padding: var(--space-2);
  box-shadow: 0 10px 24px rgba(26, 38, 32, 0.08);
}

.eyebrow {
  margin: 0 0 var(--space-2);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 0;
  font-size: clamp(28px, 5vw, 48px);
  line-height: 1.05;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h2 {
  margin-bottom: var(--space-2);
  font-size: 20px;
}

h3 {
  margin-bottom: var(--space-2);
  font-size: 17px;
}

.topbar-actions,
.output-toolbar,
.tabs,
.segmented,
.score-row,
.button-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.workspace {
  display: grid;
  grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
  gap: var(--space-5);
  align-items: start;
}

.input-pane,
.output-pane {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-panel);
  box-shadow: var(--shadow-panel);
}

.input-pane {
  position: sticky;
  top: var(--space-5);
  padding: var(--space-5);
}

.pane-header p {
  margin-bottom: var(--space-5);
  color: var(--color-muted);
  line-height: 1.6;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

label,
fieldset {
  min-width: 0;
}

label span,
legend {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 650;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-paper);
  color: var(--color-ink);
  padding: 11px 12px;
  outline: none;
}

textarea {
  resize: vertical;
  line-height: 1.55;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-soft);
}

.full {
  grid-column: 1 / -1;
}

fieldset {
  margin: 0;
  padding: 0;
  border: 0;
}

.segmented {
  flex-wrap: wrap;
}

.segmented label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 38px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 0 var(--space-3);
  background: var(--color-paper);
  color: var(--color-ink);
  font-size: 14px;
}

.segmented input {
  width: auto;
}

.cross-panel {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-paper);
  padding: var(--space-4);
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
}

.switch-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 34px;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 0 var(--space-3);
  background: var(--color-panel);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
}

.switch-label input {
  width: auto;
}

.cross-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3);
  opacity: 0.48;
  pointer-events: none;
}

.cross-panel.is-enabled .cross-grid {
  opacity: 1;
  pointer-events: auto;
}

.primary-button,
.secondary-button,
.icon-button,
.tab {
  min-height: 40px;
  border-radius: var(--radius);
  border: 1px solid var(--color-line);
  padding: 0 var(--space-4);
  white-space: nowrap;
}

.primary-button {
  border-color: var(--color-accent-strong);
  background: var(--color-accent);
  color: white;
  font-weight: 750;
}

.secondary-button,
.icon-button,
.tab {
  background: var(--color-paper);
  color: var(--color-ink);
}

.primary-button:hover,
.primary-button:focus-visible {
  background: var(--color-accent-strong);
}

.secondary-button:hover,
.icon-button:hover,
.tab:hover,
.tab.active {
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.output-pane {
  min-height: calc(100vh - 48px);
}

.output-toolbar {
  position: sticky;
  top: 0;
  z-index: 2;
  justify-content: space-between;
  border-bottom: 1px solid var(--color-line);
  border-radius: var(--radius) var(--radius) 0 0;
  background: rgba(255, 255, 255, 0.94);
  padding: var(--space-3);
  backdrop-filter: blur(10px);
}

.tabs {
  overflow-x: auto;
  min-width: 0;
}

.tab {
  min-width: 72px;
}

.result-panel {
  padding: var(--space-5);
}

.module {
  display: grid;
  gap: var(--space-4);
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-4);
}

.block,
.metric,
.lesson,
.rubric-row {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-paper);
  padding: var(--space-4);
}

.block p,
.lesson p,
.metric p {
  color: var(--color-muted);
  line-height: 1.65;
}

.tag-list,
.question-list,
.check-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
}

.tag,
.status {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border-radius: 999px;
  padding: 0 var(--space-3);
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  font-size: 13px;
  font-weight: 700;
}

.status.warn {
  background: var(--color-warn-soft);
  color: var(--color-warn);
}

.status.good {
  background: var(--color-good-soft);
  color: var(--color-good);
}

.status.danger {
  background: var(--color-danger-soft);
  color: var(--color-danger);
}

.concept-map {
  display: grid;
  grid-template-columns: 1fr 1.15fr 1fr;
  gap: var(--space-3);
  align-items: stretch;
}

.concept-column {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: var(--space-4);
  background: var(--color-panel);
}

.concept-column h3 {
  font-size: 15px;
}

.concept-column ul {
  padding-left: var(--space-5);
  line-height: 1.7;
}

.question-item {
  width: 100%;
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-paper);
  padding: var(--space-4);
  line-height: 1.6;
}

.rubric {
  display: grid;
  gap: var(--space-2);
}

.rubric-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: var(--space-3);
}

.score-bar {
  height: 10px;
  flex: 1;
  border-radius: 999px;
  background: var(--color-line);
  overflow: hidden;
}

.score-fill {
  height: 100%;
  width: var(--score);
  background: var(--color-accent);
}

.empty-state {
  display: grid;
  place-items: center;
  min-height: 420px;
  border: 1px dashed var(--color-line);
  border-radius: var(--radius);
  color: var(--color-muted);
  text-align: center;
  line-height: 1.7;
}

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

  .input-pane {
    position: static;
  }

  .concept-map,
  .section-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .app-shell {
    padding: var(--space-3);
  }

  .topbar,
  .output-toolbar {
    align-items: stretch;
    flex-direction: column;
  }

  .brand-lockup {
    align-items: flex-start;
  }

  .topbar-actions {
    width: 100%;
  }

  .topbar-actions button,
  .output-toolbar > button {
    flex: 1;
  }

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

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

  .rubric-row {
    grid-template-columns: 1fr;
  }
}