/* Hallmark · genre: editorial · macrostructure: Marquee Hero · theme: Atelier · enrichment: none · nav: N9 · footer: Ft6 · audience: general · use: continuous learning · tone: restrained psychology archive · anchor hue: brick */
/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 */
/* Hallmark · contrast: pass (40–41) · slop: pass (42–45) · honest: pass (46) · chrome: pass (47) · tokens: pass (48) · responsive: pass (34, 49–57) · icons: pass (30) */
@import url("tokens.css");

html,
body {
  overflow-x: clip;
}

html {
  scroll-behavior: smooth;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100dvh;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.78;
  text-rendering: optimizeLegibility;
}

body[data-theme="dark"] {
  --color-paper: var(--color-dark-paper);
  --color-paper-raised: var(--color-dark-paper-raised);
  --color-paper-soft: var(--color-dark-paper-soft);
  --color-ink: var(--color-dark-ink);
  --color-ink-2: var(--color-dark-ink-2);
  --color-muted: var(--color-dark-muted);
  --color-rule: var(--color-dark-rule);
  --color-accent: var(--color-dark-accent);
  --color-accent-soft: var(--color-dark-accent-soft);
  --color-accent-ink: var(--color-dark-accent-ink);
  --color-focus: var(--color-dark-focus);
  --color-shadow: var(--color-dark-shadow);
  font-weight: 350;
}

a {
  color: var(--color-accent);
  text-decoration-thickness: var(--rule-thin);
  text-underline-offset: var(--space-2xs);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: var(--rule-focus) solid var(--color-focus);
  outline-offset: var(--space-2xs);
}

button,
summary {
  font: inherit;
}

.skip-link {
  position: fixed;
  inset-block-start: var(--space-sm);
  inset-inline-start: var(--space-sm);
  z-index: var(--z-sticky);
  padding: var(--space-sm) var(--space-md);
  background: var(--color-ink);
  color: var(--color-paper);
  transform: translateY(-200%);
  transition: transform var(--dur-short) var(--ease-out);
  white-space: nowrap;
}

.skip-link:focus {
  transform: translateY(0);
}

.nav-edge {
  position: relative;
  z-index: var(--z-dropdown);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  min-height: 4rem;
  padding-inline: var(--page-gutter);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  background: var(--color-paper);
}

.wordmark {
  color: var(--color-ink);
  font-family: var(--font-outlier);
  font-size: var(--text-sm);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.nav-menu {
  position: relative;
}

.nav-menu summary {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding-inline: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-small);
  color: var(--color-ink);
  cursor: pointer;
  list-style: none;
  font-weight: 700;
  line-height: 1;
  white-space: nowrap;
}

.nav-menu summary::-webkit-details-marker {
  display: none;
}

.nav-menu summary::after {
  content: "＋";
  margin-inline-start: var(--space-sm);
  color: var(--color-accent);
}

.nav-menu[open] summary::after {
  content: "－";
}

.menu-popover {
  position: absolute;
  inset-block-start: calc(100% + var(--space-xs));
  inset-inline-end: 0;
  width: min(21rem, calc(100dvw - var(--space-xl)));
  padding: var(--space-md);
  border: var(--rule-thin) solid var(--color-rule);
  border-radius: var(--radius-panel);
  background: var(--color-paper-raised);
  color: var(--color-ink);
  box-shadow: var(--shadow-menu);
  animation: menu-in var(--dur-short) var(--ease-out) both;
}

@keyframes menu-in {
  from { opacity: 0; transform: translateY(calc(-1 * var(--space-xs))); }
  to { opacity: 1; transform: translateY(0); }
}

.menu-title {
  margin: 0 0 var(--space-sm);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.menu-popover a,
.theme-toggle {
  display: flex;
  align-items: center;
  min-height: 2.75rem;
  width: 100%;
  padding-inline: var(--space-sm);
  border: 0;
  border-block-start: var(--rule-thin) solid var(--color-rule);
  background: transparent;
  color: var(--color-ink);
  text-align: start;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.menu-popover a[aria-current="page"] {
  color: var(--color-accent);
  font-weight: 700;
}

.theme-toggle:active,
.menu-popover a:active {
  transform: translateY(var(--rule-thin));
}

.theme-toggle:disabled,
.theme-toggle[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.55;
}

.theme-toggle[data-state="loading"]::after {
  content: "稍候";
  margin-inline-start: auto;
  color: var(--color-muted);
}

.theme-toggle[data-state="error"]::after {
  content: "未保存";
  margin-inline-start: auto;
  color: var(--color-error);
}

.theme-toggle[data-state="success"]::after {
  content: "已切换";
  margin-inline-start: auto;
  color: var(--color-success);
}

.hero-marquee {
  min-height: 72dvh;
  display: grid;
  align-content: end;
  padding: var(--space-2xl) var(--page-gutter) var(--space-3xl);
  border-block-end: var(--rule-strong) solid var(--color-ink);
}

.hero-marquee h1 {
  max-width: 11ch;
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.05em;
  line-height: 1.08;
  overflow-wrap: anywhere;
}

.hero-marquee h1 dfn {
  color: inherit;
  font-style: normal;
  font-weight: inherit;
}

.hero-marquee--chapter {
  min-height: 54dvh;
}

.hero-marquee--chapter h1,
.hero-marquee--reference h1 {
  max-width: 12ch;
  font-size: var(--text-display-s);
}

.hero-marquee--reference {
  min-height: 42dvh;
}

.article-shell {
  width: min(100%, var(--content-wide));
  margin-inline: auto;
  padding: var(--space-xl) var(--page-gutter) var(--space-3xl);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  margin-block-end: var(--space-2xl);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.breadcrumb a,
.breadcrumb span {
  white-space: nowrap;
}

.article-deck {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(14rem, 0.7fr);
  gap: var(--space-2xl);
  align-items: start;
  padding-block-end: var(--space-3xl);
}

.lede {
  max-width: var(--content-prose);
  margin: 0;
  color: var(--color-ink-2);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 400;
  line-height: 1.65;
}

.margin-note {
  margin: 0;
  padding-block-start: var(--space-sm);
  border-block-start: var(--rule-thin) solid var(--color-rule);
  color: var(--color-muted);
  font-size: var(--text-sm);
  line-height: 1.7;
}

.chapter-section {
  display: grid;
  grid-template-columns: minmax(10rem, 0.7fr) minmax(0, 2fr);
  gap: var(--space-2xl);
  padding-block: var(--space-2xl);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.head-hang {
  align-self: start;
}

.head-hang h2 {
  min-width: 0;
  margin: 0;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.025em;
  line-height: 1.25;
  overflow-wrap: anywhere;
}

.prose {
  min-width: 0;
  max-width: var(--content-prose);
}

.prose p {
  margin: 0 0 var(--space-lg);
}

.prose h3 {
  min-width: 0;
  margin: var(--space-xl) 0 var(--space-md);
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  font-weight: 900;
  line-height: 1.35;
  overflow-wrap: anywhere;
}

.prose ul,
.prose ol {
  margin: 0 0 var(--space-lg);
  padding-inline-start: var(--space-lg);
}

.prose li {
  margin-block-end: var(--space-sm);
}

dfn {
  color: var(--color-accent);
  font-style: normal;
  font-weight: 700;
}

.cite {
  display: inline-block;
  min-width: 1.5em;
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  white-space: nowrap;
  vertical-align: super;
}

.evidence-note,
.safety-note {
  margin-block: var(--space-xl);
  padding-block: var(--space-lg);
  border-block: var(--rule-thin) solid var(--color-rule);
}

.evidence-note h3,
.safety-note h3 {
  margin-block-start: 0;
}

.constraint-map {
  margin: var(--space-xl) 0;
  padding: var(--space-lg) 0;
  border-block: var(--rule-thin) solid var(--color-rule);
}

.constraint-map ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-md);
  margin: 0;
  padding: 0;
  list-style: none;
}

.constraint-map li {
  min-width: 0;
  padding: var(--space-md);
  background: var(--color-paper-soft);
  color: var(--color-ink);
}

.constraint-map strong {
  display: block;
  margin-block-end: var(--space-xs);
  font-family: var(--font-display);
  font-size: var(--text-md);
}

.constraint-map figcaption {
  margin-block-start: var(--space-md);
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.table-wrap {
  margin-block: var(--space-xl);
  overflow-x: auto;
}

.spec-sheet {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

.spec-sheet caption {
  padding-block-end: var(--space-sm);
  color: var(--color-muted);
  text-align: start;
}

.spec-sheet th,
.spec-sheet td {
  padding: var(--space-md) var(--space-sm);
  border-block-end: var(--rule-thin) solid var(--color-rule);
  text-align: start;
  vertical-align: top;
}

.spec-sheet th {
  width: 22%;
  color: var(--color-ink);
  font-weight: 700;
}

.source-list {
  display: grid;
  gap: var(--space-lg);
  margin: 0;
  padding: 0;
  list-style: none;
}

.source-item {
  padding-block-end: var(--space-lg);
  border-block-end: var(--rule-thin) solid var(--color-rule);
}

.source-id {
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
}

.source-item h3 {
  margin: var(--space-xs) 0 var(--space-sm);
  font-family: var(--font-display);
  font-style: normal;
  font-weight: 900;
}

.source-item p {
  max-width: var(--content-prose);
  margin: 0 0 var(--space-sm);
}

.chapter-next {
  display: flex;
  justify-content: flex-end;
  padding-block: var(--space-2xl);
  border-block-start: var(--rule-strong) solid var(--color-ink);
}

.link-next {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  color: var(--color-ink);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
}

.link-next::after {
  content: "";
  position: absolute;
  inset-inline: 0;
  inset-block-end: var(--space-xs);
  height: var(--rule-thin);
  background: var(--color-accent);
  transform: scaleX(0.28);
  transform-origin: left;
  transition: transform var(--dur-short) var(--ease-out);
}

.link-next:active {
  transform: translateY(var(--rule-thin));
}

.foot-letter {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-2xl) var(--page-gutter);
  border-block-start: var(--rule-thin) solid var(--color-rule);
}

.foot-letter__close {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-style: normal;
  line-height: 1.5;
}

.foot-letter__sign {
  font-style: normal;
  font-weight: 900;
}

.foot-letter__meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin: var(--space-lg) 0 0;
  color: var(--color-muted);
  font-size: var(--text-sm);
}

.foot-letter__meta a {
  white-space: nowrap;
}

@media (hover: hover) and (pointer: fine) {
  .menu-popover a:hover,
  .theme-toggle:hover {
    background: var(--color-paper-soft);
    color: var(--color-accent);
  }

  .link-next:hover::after {
    transform: scaleX(1);
  }
}

.chapter-section:nth-of-type(odd) {
  padding-block: var(--space-3xl) var(--space-2xl);
}

@media (min-width: 48rem) {
  .hero-marquee {
    padding-block-end: var(--space-3xl);
  }
}

@media (max-width: 59.99rem) {
  .article-deck,
  .chapter-section {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-xl);
  }

  .head-hang {
    padding-block-end: var(--space-sm);
  }
}

@media (max-width: 39.99rem) {
  .hero-marquee {
    min-height: 62dvh;
    padding-block-start: var(--space-2xl);
  }

  .hero-marquee--chapter,
  .hero-marquee--reference {
    min-height: 42dvh;
  }

  .constraint-map ol {
    grid-template-columns: minmax(0, 1fr);
  }

  .spec-sheet,
  .spec-sheet tbody,
  .spec-sheet tr,
  .spec-sheet th,
  .spec-sheet td {
    display: block;
    width: 100%;
  }

  .spec-sheet tr {
    padding-block: var(--space-sm);
    border-block-end: var(--rule-thin) solid var(--color-rule);
  }

  .spec-sheet th,
  .spec-sheet td {
    padding: var(--space-xs) 0;
    border: 0;
  }

  .spec-sheet td::before {
    content: attr(data-label);
    display: block;
    color: var(--color-muted);
    font-size: var(--text-sm);
    font-weight: 700;
  }

  .chapter-next {
    justify-content: flex-start;
  }

  .link-next {
    font-size: var(--text-md);
  }
}

@media (pointer: coarse) {
  .wordmark,
  .menu-popover a,
  .theme-toggle,
  .link-next,
  .foot-letter__meta a,
  .breadcrumb a {
    min-height: 2.75rem;
  }

  .wordmark,
  .foot-letter__meta a,
  .breadcrumb a {
    display: inline-flex;
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: var(--dur-micro) !important;
    animation-iteration-count: 1 !important;
    transition-duration: var(--dur-micro) !important;
  }

  .menu-popover {
    animation: none;
  }

  .link-next::after {
    transform: scaleX(1);
  }
}

@media print {
  .nav-edge,
  .skip-link,
  .chapter-next,
  .theme-toggle {
    display: none;
  }

  body {
    background: var(--color-paper-raised);
    color: var(--color-ink);
  }

  .hero-marquee,
  .hero-marquee--chapter,
  .hero-marquee--reference {
    min-height: auto;
    padding-block: var(--space-xl);
  }

  a {
    color: var(--color-ink);
  }
}