:root {
  --cb-ink: #231815;
  --cb-cocoa: #4a3b33;
  --cb-stone: #8c8480;
  --cb-mist: #dad9d8;
  --cb-linen: #f5f0e7;
  --cb-paper: #ffffff;
  --cb-wheat: #b8893b;
  --cb-sage: #4f6f5f;
  --cb-clay: #9a5f45;
  --shadow: 0 1px 0 rgba(35, 24, 21, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--cb-ink);
  background:
    linear-gradient(90deg, rgba(35, 24, 21, 0.03) 1px, transparent 1px),
    linear-gradient(180deg, var(--cb-linen), var(--cb-paper) 46rem);
  background-size: 36px 36px, auto;
  font-family: "Noto Sans TC", "Jost", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.7;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 56px);
  background: rgba(245, 240, 231, 0.94);
  border-bottom: 1px solid rgba(35, 24, 21, 0.12);
  backdrop-filter: blur(12px);
}

.brand-lockup {
  min-width: 180px;
}

.brand-mark {
  font-family: Georgia, "Times New Roman", "Noto Serif TC", serif;
  font-size: 19px;
  letter-spacing: 0.18em;
  line-height: 1;
}

.tagline,
.overline {
  color: var(--cb-cocoa);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

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

.nav a,
.store-tabs button,
.primary-action,
.secondary-action {
  color: var(--cb-ink);
  background: transparent;
  border: 1px solid rgba(35, 24, 21, 0.24);
  border-radius: 2px;
  padding: 8px 12px;
  text-decoration: none;
  font: inherit;
  cursor: pointer;
}

.nav a:hover,
.store-tabs button:hover,
.store-tabs button[aria-selected="true"],
.primary-action {
  border-color: var(--cb-ink);
  background: var(--cb-ink);
  color: var(--cb-paper);
}

.primary-action:hover,
.secondary-action:hover {
  border-color: var(--cb-sage);
  background: var(--cb-sage);
  color: var(--cb-paper);
}

main {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 36px 0 64px;
}

.summary-grid,
.split {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.8fr);
  gap: 24px;
}

.summary-main,
.principles,
.panel,
.guardrail {
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(35, 24, 21, 0.13);
  box-shadow: var(--shadow);
}

.summary-main,
.principles,
.panel {
  padding: clamp(22px, 4vw, 40px);
}

.summary-main h1 {
  max-width: 820px;
  margin: 0 0 18px;
  font-family: Georgia, "Noto Serif TC", serif;
  font-size: clamp(31px, 5vw, 58px);
  font-weight: 500;
  letter-spacing: 0;
  line-height: 1.15;
}

.summary-main p {
  max-width: 720px;
  margin: 0;
  color: var(--cb-cocoa);
  font-size: 18px;
}

.principles h2,
.section-head h2 {
  margin: 0;
  font-family: Georgia, "Noto Serif TC", serif;
  font-weight: 500;
  letter-spacing: 0;
}

.principles dl {
  margin: 20px 0 0;
}

.principles dt {
  color: var(--cb-stone);
  font-size: 13px;
}

.principles dd {
  margin: 0 0 14px;
  color: var(--cb-ink);
}

.panel {
  margin-top: 24px;
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--cb-mist);
  padding-bottom: 14px;
}

.section-head .overline {
  margin: 0;
}

.store-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.store-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
}

.detail-block,
.agent-card,
.message-card,
.schema-card,
.workflow-card,
.tool-card {
  border: 1px solid rgba(35, 24, 21, 0.12);
  background: rgba(245, 240, 231, 0.48);
  padding: 18px;
}

.detail-block h3,
.agent-card h3,
.message-card h3,
.schema-card h3,
.guardrail h3,
.workflow-card h3,
.tool-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
}

.agent-grid,
.schema-grid,
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.agent-card p,
.message-card p,
.workflow-card p {
  margin: 0 0 12px;
}

.meta {
  color: var(--cb-stone);
  font-size: 13px;
}

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

.workflow-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.tool-card.wide {
  grid-column: 1 / -1;
}

.tool-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(35, 24, 21, 0.13);
  padding-bottom: 12px;
}

.tool-head .overline {
  margin: 0 0 4px;
}

.voice-summary {
  margin-bottom: 16px;
  border-left: 3px solid var(--cb-sage);
  background: rgba(79, 111, 95, 0.08);
  color: var(--cb-cocoa);
  padding: 10px 12px;
  font-size: 13px;
}

.voice-summary strong {
  color: var(--cb-ink);
}

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

.field {
  display: grid;
  gap: 6px;
  color: var(--cb-cocoa);
  font-size: 13px;
}

.field span {
  line-height: 1.3;
}

input,
select,
textarea {
  width: 100%;
  min-height: 42px;
  border: 1px solid rgba(35, 24, 21, 0.22);
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--cb-ink);
  font: inherit;
  letter-spacing: 0;
  padding: 8px 10px;
}

textarea {
  min-height: 190px;
  resize: vertical;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--cb-sage);
  outline: 2px solid rgba(79, 111, 95, 0.18);
}

.primary-action,
.secondary-action {
  min-height: 42px;
  white-space: nowrap;
}

.tool-form .primary-action {
  align-self: end;
}

.generated-output,
.check-result {
  margin: 16px 0 0;
  border: 1px solid rgba(35, 24, 21, 0.14);
  background: rgba(255, 255, 255, 0.72);
  color: var(--cb-ink);
  box-shadow: inset 0 1px 0 rgba(35, 24, 21, 0.04);
}

.generated-output {
  min-height: 260px;
  overflow: auto;
  white-space: pre-wrap;
  font: 14px/1.7 "Noto Sans TC", system-ui, sans-serif;
  padding: 16px;
}

.checker-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(260px, 0.9fr);
  gap: 18px;
}

.check-result {
  min-height: 190px;
  padding: 16px;
}

.check-result p {
  margin: 12px 0 0;
}

.status-pass,
.status-error {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  border: 1px solid currentColor;
  padding: 4px 10px;
  font-size: 13px;
}

.status-pass {
  color: var(--cb-sage);
}

.status-error {
  color: var(--cb-clay);
}

.guardrail {
  padding: 22px;
  align-self: start;
}

ul {
  margin: 0;
  padding-left: 20px;
}

.schema-card ul {
  color: var(--cb-cocoa);
  font-size: 13px;
  line-height: 1.5;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 38px;
  border-top: 1px solid var(--cb-mist);
  color: var(--cb-cocoa);
  font-size: 13px;
}

@media (max-width: 920px) {
  .topbar,
  .section-head,
  footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .summary-grid,
  .split,
  .store-detail,
  .tool-grid,
  .checker-layout {
    grid-template-columns: 1fr;
  }

  .agent-grid,
  .schema-grid,
  .workflow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 560px) {
  main {
    width: min(100% - 20px, 1180px);
  }

  .agent-grid,
  .schema-grid,
  .workflow-grid,
  .tool-form {
    grid-template-columns: 1fr;
  }

  .tool-head {
    align-items: flex-start;
    flex-direction: column;
  }
}