:root {
  --ink: #18211e;
  --muted: #66736f;
  --line: #d9ded7;
  --surface: #f7f8f4;
  --panel: #ffffff;
  --accent: #0f7b6c;
  --accent-soft: #dbeee9;
  --warn: #9b6b16;
  --warn-soft: #f7ecd5;
  --shadow: 0 18px 50px rgba(35, 49, 44, 0.1);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--surface);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  letter-spacing: 0;
}

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

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 36px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(247, 248, 244, 0.95);
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(16px);
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 0;
  font-size: 30px;
  line-height: 1.15;
}

h2 {
  margin-bottom: 0;
  font-size: 24px;
}

h3 {
  margin-bottom: 14px;
  font-size: 16px;
}

.source-status {
  color: var(--muted);
  font-size: 13px;
  text-align: right;
}

.app-shell {
  padding: 22px 36px 40px;
}

.tabs {
  display: flex;
  gap: 4px;
  max-width: 1120px;
  padding: 4px;
  background: #e9ede6;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin-bottom: 22px;
}

.tab {
  flex: 1;
  border: 0;
  border-radius: 6px;
  padding: 10px 12px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
}

.tab.is-active {
  color: var(--ink);
  background: var(--panel);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
}

.view {
  display: none;
  animation: rise 220ms ease-out;
}

.view.is-active {
  display: block;
}

#view-recommender {
  grid-template-columns: minmax(280px, 360px) 1fr;
  gap: 24px;
  align-items: start;
}

#view-recommender.is-active {
  display: grid;
}

.selector-panel,
.recommendation-hero,
.library-item,
.product-item,
.script-column,
.knowledge-hero,
.mini-card,
.cfda-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.selector-panel {
  padding: 18px;
  position: sticky;
  top: 126px;
}

.section-head {
  margin-bottom: 18px;
}

.scenario-list {
  display: grid;
  gap: 8px;
  margin-bottom: 18px;
}

.scenario-option {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  background: #fbfcf9;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  transition: border-color 160ms ease, background 160ms ease, transform 160ms ease;
}

.scenario-option:hover {
  transform: translateY(-1px);
  border-color: var(--accent);
}

.scenario-option.is-active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.field {
  display: grid;
  gap: 7px;
  margin-top: 14px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

textarea,
select,
.search {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 11px 12px;
  background: #fbfcf9;
  color: var(--ink);
  outline: none;
}

textarea:focus,
select:focus,
.search:focus {
  border-color: var(--accent);
}

.workspace {
  min-width: 0;
}

.recommendation-hero {
  padding: 24px;
  margin-bottom: 22px;
  min-height: 220px;
  background:
    linear-gradient(115deg, rgba(15, 123, 108, 0.08), transparent 48%),
    var(--panel);
}

.recommendation-hero h2 {
  font-size: 28px;
  margin-bottom: 10px;
}

.recommendation-hero p {
  color: var(--muted);
  line-height: 1.7;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 0;
}

.chip {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 5px 9px;
  background: #eef2ed;
  color: #3d4a46;
  font-size: 12px;
}

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

.two-column {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.result-list,
.library-list,
.product-grid,
.script-board,
.collagen-board,
.cfda-list,
.info-grid,
.compact-grid,
.ingredient-grid {
  display: grid;
  gap: 12px;
}

.result-card,
.library-item,
.product-item {
  padding: 16px;
}

.result-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.result-card h4,
.library-item h3,
.product-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.35;
}

.result-card p,
.library-item p,
.product-item p,
.script-column p,
.detail-list {
  color: var(--muted);
  line-height: 1.65;
  font-size: 14px;
}

.library-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 18px;
}

.library-head .search {
  max-width: 430px;
}

.library-item {
  overflow: hidden;
}

.library-summary {
  display: grid;
  grid-template-columns: minmax(180px, 0.8fr) minmax(240px, 1.4fr) minmax(220px, 1fr);
  gap: 18px;
  align-items: start;
}

.detail-list {
  margin: 10px 0 0;
  padding-left: 18px;
}

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

.product-item {
  min-height: 250px;
}

.price {
  color: var(--accent);
  font-weight: 800;
}

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

.script-column {
  padding: 18px;
}

.script-column h3 {
  margin-bottom: 10px;
}

.knowledge-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
  gap: 20px;
  padding: 22px;
  background:
    linear-gradient(115deg, rgba(15, 123, 108, 0.08), transparent 48%),
    var(--panel);
}

.knowledge-hero h3 {
  margin-bottom: 10px;
  font-size: 24px;
}

.knowledge-hero p,
.mini-card p,
.cfda-item p,
.field-grid span,
.detail-columns {
  color: var(--muted);
  line-height: 1.65;
  font-size: 14px;
}

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

.metric-grid div {
  display: grid;
  align-content: center;
  min-height: 84px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcf9;
}

.metric-grid strong {
  color: var(--accent);
  font-size: 25px;
}

.metric-grid span {
  color: var(--muted);
  font-size: 12px;
}

.knowledge-section {
  display: grid;
  gap: 12px;
}

.knowledge-section h3 {
  margin: 10px 0 0;
}

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

.info-grid,
.collagen-products {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.mini-card {
  padding: 15px;
}

.mini-card h4 {
  margin: 0 0 8px;
  font-size: 15px;
  line-height: 1.35;
}

.result-count {
  margin: -8px 0 12px;
  color: var(--muted);
  font-size: 13px;
}

.cfda-item {
  padding: 16px;
}

.cfda-title {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
}

.cfda-title h3 {
  margin-bottom: 6px;
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 14px 0;
}

.field-grid div {
  display: grid;
  gap: 5px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcf9;
}

.field-grid strong,
.detail-columns strong {
  font-size: 13px;
}

.ingredient-text {
  word-break: break-word;
}

details {
  margin-top: 12px;
}

summary {
  color: var(--accent);
  cursor: pointer;
  font-size: 14px;
  font-weight: 700;
}

.detail-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.empty {
  padding: 24px;
  color: var(--muted);
  border: 1px dashed var(--line);
  border-radius: 8px;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 980px) {
  .app-header,
  .app-shell {
    padding-left: 18px;
    padding-right: 18px;
  }

  #view-recommender.is-active,
  .two-column,
  .library-summary,
  .product-grid,
  .script-board,
  .knowledge-hero,
  .compact-grid,
  .info-grid,
  .ingredient-grid,
  .field-grid,
  .detail-columns {
    grid-template-columns: 1fr;
  }

  .selector-panel {
    position: static;
  }

  .tabs {
    overflow-x: auto;
  }

  .tab {
    min-width: 118px;
  }
}

@media (max-width: 640px) {
  .app-header,
  .library-head {
    align-items: stretch;
    flex-direction: column;
  }

  .source-status {
    text-align: left;
  }

  h1 {
    font-size: 25px;
  }

  .recommendation-hero h2 {
    font-size: 23px;
  }
}