:root {
  color-scheme: light;
  --surface: #f9f9f8;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f3f4f3;
  --surface-container: #edeeed;
  --surface-container-high: #e7e8e7;
  --surface-container-highest: #e1e3e2;
  --surface-variant: #e1e3e2;
  --on-surface: #191c1c;
  --on-surface-variant: #3f4948;
  --outline: #6f7978;
  --outline-variant: #bfc8c8;
  --primary: #216565;
  --primary-container: #3e7e7e;
  --on-primary: #ffffff;
  --secondary: #825501;
  --secondary-container: #fec16a;
  --tertiary: #515c70;
  --shadow-soft: 0 4px 20px rgba(0, 0, 0, 0.05);
  font-family: "Public Sans", "Microsoft YaHei", "PingFang SC", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

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

body {
  min-height: 100vh;
  margin: 0;
  background: var(--surface);
  color: var(--on-surface);
  font-size: 16px;
  line-height: 24px;
  -webkit-tap-highlight-color: transparent;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.top-app-bar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 40;
  display: flex;
  height: 64px;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-bottom: 1px solid var(--outline-variant);
  background: var(--surface);
  padding: 8px 16px;
}

.brand-lockup {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  display: none;
  color: var(--primary);
  font-size: 24px;
  font-weight: 700;
}

.brand-lockup h1 {
  margin: 0;
  color: var(--primary);
  font-size: 24px;
  font-weight: 700;
  line-height: 28px;
  letter-spacing: 0;
}

.brand-lockup p {
  margin: 0;
  color: var(--on-surface-variant);
  font-size: 12px;
  font-weight: 600;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.app-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.icon-action {
  display: grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--on-surface-variant);
  font-size: 24px;
  line-height: 1;
}

.icon-action:hover,
.icon-action:focus-visible {
  background: var(--surface-container);
  outline: none;
}

.app-shell {
  width: min(100%, 1200px);
  margin: 0 auto;
  padding: 84px 16px 104px;
}

.upload-section,
.form-card,
.output-section {
  margin-bottom: 32px;
}

.section-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}

.section-row h2,
.form-card h2 {
  margin: 0;
  color: var(--on-surface);
  font-size: 24px;
  font-weight: 700;
  line-height: 32px;
  letter-spacing: 0;
}

.helper-label {
  flex: 0 0 auto;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.upload-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.upload-card {
  min-width: 0;
  overflow: hidden;
  border: 2px dashed var(--outline-variant);
  border-radius: 8px;
  background: var(--surface-container-lowest);
  transition: 160ms ease;
}

.upload-card:hover,
.upload-card.dragging {
  background: var(--surface-container-low);
  border-color: var(--primary);
}

.upload-target {
  display: flex;
  min-height: 124px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  text-align: center;
}

.upload-target input {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  opacity: 0;
  pointer-events: none;
}

.add-symbol {
  color: var(--outline);
  font-size: 32px;
  line-height: 1;
}

.upload-target strong {
  color: var(--on-surface-variant);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.upload-target span span,
.upload-target strong span {
  letter-spacing: 0;
}

.preview {
  display: none;
  border-top: 1px solid var(--outline-variant);
  background: var(--surface-container-low);
  color: var(--on-surface-variant);
  font-size: 12px;
  line-height: 16px;
}

.preview:not(.empty) {
  display: block;
}

.preview img {
  display: block;
  width: 100%;
  height: 128px;
  object-fit: contain;
  background: #fff;
}

.preview-name {
  display: block;
  overflow: hidden;
  padding: 8px 10px;
  color: var(--on-surface-variant);
  font-size: 12px;
  line-height: 16px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.form-card {
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  background: var(--surface-container-lowest);
  padding: 24px;
}

.card-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--outline-variant);
  padding-bottom: 14px;
  margin-bottom: 24px;
}

.text-action {
  min-height: 36px;
  border: 1px solid var(--outline-variant);
  border-radius: 4px;
  background: var(--surface-container-low);
  color: var(--primary);
  padding: 7px 12px;
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.meta-form {
  display: grid;
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
  min-width: 0;
}

.field > span,
.judgement-row > span {
  color: var(--on-surface-variant);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.field em {
  font-style: normal;
  letter-spacing: 0;
}

input,
textarea {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--outline-variant);
  border-radius: 4px;
  background: var(--surface-container-low);
  color: var(--on-surface);
  padding: 12px;
  outline: none;
}

textarea {
  min-height: 130px;
  resize: vertical;
  line-height: 24px;
}

input:focus,
textarea:focus {
  border-color: var(--primary);
  background: var(--surface-container-lowest);
  box-shadow: 0 0 0 2px rgba(33, 101, 101, 0.2);
}

.choice-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.choice-row,
.mini-choice-row {
  display: flex;
  gap: 8px;
}

.choice,
.mini-choice {
  min-width: 0;
  border: 1px solid transparent;
  border-radius: 4px;
  background: var(--surface-container-low);
  color: var(--on-surface-variant);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
  transition: 140ms ease;
}

.choice {
  min-height: 34px;
  padding: 8px 10px;
}

.choice-row .choice {
  flex: 1 1 0;
  min-height: 36px;
}

.choice:hover,
.mini-choice:hover {
  background: var(--surface-container-highest);
}

.choice.active,
.mini-choice.active {
  border-color: var(--primary);
  background: var(--primary);
  color: var(--on-primary);
}

.number-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.judgement-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.mini-choice {
  min-height: 28px;
  padding: 5px 11px;
  letter-spacing: 0;
}

.mini-choice.active {
  background: rgba(33, 101, 101, 0.1);
  color: var(--primary);
}

.primary-button {
  display: inline-flex;
  width: 100%;
  min-height: 60px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 0 0 32px;
  border: 0;
  border-radius: 8px;
  background: var(--primary);
  color: var(--on-primary);
  box-shadow: var(--shadow-soft);
  font-size: 18px;
  font-weight: 700;
  line-height: 28px;
}

.primary-button:hover,
.primary-button:focus-visible {
  background: #174d4d;
  outline: none;
}

.mode-tabs {
  display: flex;
  overflow-x: auto;
  border-bottom: 1px solid var(--outline-variant);
  white-space: nowrap;
}

.tab {
  min-height: 48px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: var(--on-surface-variant);
  padding: 12px 16px 10px;
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.tab.active {
  border-bottom-color: var(--primary);
  color: var(--primary);
}

.result-box {
  display: grid;
  gap: 16px;
  padding-top: 24px;
}

.interpretation-panel,
.insight-panel,
.warning-panel,
.description-panel {
  border-radius: 4px;
  padding: 16px;
}

.interpretation-panel,
.insight-panel {
  border: 1px solid var(--outline-variant);
  background: var(--surface-container-lowest);
}

.warning-panel {
  border: 1px solid var(--secondary-container);
  background: rgba(254, 193, 106, 0.12);
}

.description-panel {
  border: 1px solid rgba(33, 101, 101, 0.25);
  background: rgba(33, 101, 101, 0.06);
}

.result-box h3 {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  line-height: 24px;
  letter-spacing: 0;
}

.warning-panel h3 {
  color: var(--secondary);
}

.result-box p,
.result-box ul {
  margin: 0;
  color: var(--on-surface-variant);
  font-size: 14px;
  line-height: 22px;
}

.result-box p + p {
  margin-top: 10px;
}

.result-box ul {
  display: grid;
  gap: 8px;
  padding-left: 18px;
}

.result-box .placeholder {
  color: var(--on-surface-variant);
}

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

.metric-tile {
  min-width: 0;
  border-radius: 4px;
  background: var(--surface-container-low);
  padding: 10px;
}

.metric-tile span {
  display: block;
  margin-bottom: 4px;
  color: var(--on-surface-variant);
  font-size: 11px;
  line-height: 14px;
}

.metric-tile strong {
  color: var(--on-surface);
  font-size: 14px;
  line-height: 20px;
}

.metric-tile strong.positive {
  color: var(--primary);
}

.paper-quote {
  border-left: 4px solid var(--primary);
  background: rgba(255, 255, 255, 0.72);
  color: var(--on-surface);
  font-style: italic;
  padding: 10px 12px;
}

.panel-note,
.completion-note {
  margin-top: 12px !important;
  border-top: 1px solid var(--outline-variant);
  padding-top: 10px;
}

.completion-note {
  color: var(--primary) !important;
  font-weight: 600;
}

.bottom-bar {
  position: fixed;
  inset: auto 0 0;
  z-index: 40;
  display: flex;
  height: calc(64px + env(safe-area-inset-bottom));
  align-items: center;
  justify-content: space-around;
  border-top: 1px solid var(--outline-variant);
  background: var(--surface-container-lowest);
  padding: 0 16px env(safe-area-inset-bottom);
}

.bottom-bar button {
  display: flex;
  min-width: 120px;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 2px;
  border: 0;
  border-radius: 4px;
  background: transparent;
  color: var(--on-surface-variant);
  font-size: 12px;
  font-weight: 700;
  line-height: 16px;
  letter-spacing: 0.05em;
}

.bottom-bar button span {
  font-size: 24px;
  line-height: 1;
}

.bottom-bar button:hover,
.bottom-bar button:focus-visible {
  color: var(--primary);
  background: var(--surface-container-low);
  outline: none;
}

.toast {
  position: fixed;
  right: 16px;
  bottom: 84px;
  z-index: 60;
  max-width: min(360px, calc(100vw - 32px));
  transform: translateY(18px);
  opacity: 0;
  pointer-events: none;
  border-radius: 4px;
  background: #2e3131;
  color: #f0f1f0;
  padding: 12px 14px;
  font-size: 14px;
  line-height: 20px;
  transition: 180ms ease;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

@media (min-width: 760px) {
  .top-app-bar {
    padding-inline: 24px;
  }

  .brand-icon {
    display: inline-block;
  }

  .brand-lockup h1 {
    font-size: 30px;
    line-height: 38px;
  }

  .app-shell {
    padding-inline: 24px;
  }

  .upload-grid {
    gap: 16px;
  }
}

@media (max-width: 430px) {
  .brand-lockup h1 {
    font-size: 23px;
  }

  .form-card {
    padding: 24px;
  }

  .upload-target {
    min-height: 124px;
    padding: 14px 8px;
  }

  .number-grid {
    gap: 14px 16px;
  }
}