/* VCDesign site — shared stylesheet for the v2 pages (ja at /, en at /en/). */

:root {
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-2: #f2f0ea;
  --text: #1c1d1f;
  --muted: #55595f;
  --border: #d9d5cb;
  --accent: #1f5f8b;
  --accent-soft: #e3eef6;
  --up: #1d6b45;
  --up-soft: #e2f1e8;
  --down: #9a3412;
  --down-soft: #f8e7df;
  --code-bg: #f2f0ea;
  --focus: #b45309;
  --measure: 46rem;
  --wide: 64rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #141517;
    --surface: #1c1e21;
    --surface-2: #23262a;
    --text: #e8e6e1;
    --muted: #a9adb3;
    --border: #3a3e44;
    --accent: #7db7e0;
    --accent-soft: #1d2d3a;
    --up: #7fd1a4;
    --up-soft: #1b3127;
    --down: #f0a07a;
    --down-soft: #3a2419;
    --code-bg: #23262a;
    --focus: #f5b454;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #141517;
  --surface: #1c1e21;
  --surface-2: #23262a;
  --text: #e8e6e1;
  --muted: #a9adb3;
  --border: #3a3e44;
  --accent: #7db7e0;
  --accent-soft: #1d2d3a;
  --up: #7fd1a4;
  --up-soft: #1b3127;
  --down: #f0a07a;
  --down-soft: #3a2419;
  --code-bg: #23262a;
  --focus: #f5b454;
  color-scheme: dark;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Hiragino Kaku Gothic ProN",
    "Yu Gothic UI", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  overflow-wrap: anywhere;
}

:lang(en) body,
body:lang(en) {
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.18em;
}

a:hover {
  text-decoration-thickness: 2px;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  background: var(--code-bg);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  overflow-wrap: anywhere;
}

pre {
  overflow-x: auto;
  margin: 1rem 0;
  padding: 0.8rem 1rem;
  background: var(--code-bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.85rem;
  line-height: 1.55;
}

pre code {
  background: none;
  padding: 0;
  font-size: inherit;
  overflow-wrap: normal;
}

.skip {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip:focus {
  left: 16px;
  top: 8px;
  background: var(--surface);
  padding: 0.4rem 0.8rem;
  z-index: 10;
}

/* ---------- header ---------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}

.site-header .bar {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0.6rem 16px;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--text);
  text-decoration: none;
  letter-spacing: 0.02em;
}

.lang {
  margin-left: auto;
  font-size: 0.9rem;
}

.site-nav {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 0 16px;
}

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0 0 0.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.2rem 1.1rem;
  font-size: 0.92rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--text);
  text-decoration: underline;
}

/* ---------- main ---------- */

main {
  max-width: var(--measure);
  margin: 0 auto;
  padding: 2rem 16px 3rem;
}

main.wide {
  max-width: var(--wide);
}

h1,
h2,
h3 {
  line-height: 1.35;
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.7rem, 4.5vw, 2.3rem);
  margin: 0.2rem 0 0.8rem;
}

h2 {
  font-size: 1.4rem;
  margin: 2.8rem 0 0.8rem;
  padding-top: 0.6rem;
  border-top: 1px solid var(--border);
}

h3 {
  font-size: 1.12rem;
  margin: 1.8rem 0 0.5rem;
}

.lead {
  font-size: 1.08rem;
  color: var(--muted);
}

.eyebrow {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
  letter-spacing: 0.04em;
}

.source {
  font-size: 0.88rem;
  color: var(--muted);
}

blockquote.canon {
  margin: 1.2rem 0;
  padding: 0.9rem 1.1rem;
  background: var(--accent-soft);
  border-left: 4px solid var(--accent);
  border-radius: 0 6px 6px 0;
}

blockquote.canon p {
  margin: 0.2rem 0;
}

blockquote.canon .big {
  font-size: 1.15rem;
  font-weight: 700;
}

blockquote.canon cite {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.85rem;
  font-style: normal;
  color: var(--muted);
}

.note {
  margin: 1.2rem 0;
  padding: 0.8rem 1rem;
  border: 1px solid var(--border);
  background: var(--surface-2);
  border-radius: 6px;
  font-size: 0.95rem;
}

.note > :first-child {
  margin-top: 0;
}

.note > :last-child {
  margin-bottom: 0;
}

/* ---------- hero ---------- */

.hero {
  padding: 1rem 0 0.5rem;
}

.hero .principle {
  font-size: clamp(1.25rem, 3.6vw, 1.6rem);
  font-weight: 700;
  line-height: 1.5;
  margin: 1rem 0;
}

.hero .principle .up {
  color: var(--up);
}

.hero .principle .down {
  color: var(--down);
}

/* ---------- tables ---------- */

.table-wrap {
  overflow-x: auto;
  margin: 1rem 0;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--surface);
}

table {
  border-collapse: collapse;
  width: 100%;
  font-size: 0.93rem;
  line-height: 1.6;
}

th,
td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0.75rem;
  border-bottom: 1px solid var(--border);
}

thead th {
  background: var(--surface-2);
  font-weight: 700;
  white-space: nowrap;
}

tbody tr:last-child th,
tbody tr:last-child td {
  border-bottom: 0;
}

tbody th {
  font-weight: 700;
  white-space: nowrap;
}

/* ---------- cards ---------- */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 0.9rem;
  margin: 1rem 0;
  padding: 0;
  list-style: none;
}

.card {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 0.9rem 1rem;
}

.card h2,
.card h3 {
  margin: 0 0 0.3rem;
  padding: 0;
  border: 0;
  font-size: 1.05rem;
}

.card p {
  margin: 0.3rem 0;
  font-size: 0.93rem;
}

.card .status {
  display: inline-block;
  font-size: 0.78rem;
  padding: 0.05rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--muted);
}

.card .status.ok {
  border-color: var(--up);
  color: var(--up);
}

.card .status.warn {
  border-color: var(--down);
  color: var(--down);
}

/* ---------- five principles strip ---------- */

.steps {
  list-style: none;
  counter-reset: step;
  margin: 1rem 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.5rem;
}

.steps li {
  counter-increment: step;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 0.6rem 0.7rem;
  font-size: 0.88rem;
  line-height: 1.5;
}

.steps li::before {
  content: counter(step);
  display: inline-block;
  font-weight: 700;
  color: var(--accent);
  margin-right: 0.35rem;
}

.steps li strong {
  font-size: 1rem;
}

.steps li span {
  display: block;
  color: var(--muted);
  margin-top: 0.2rem;
}

@media (max-width: 40rem) {
  .steps {
    grid-template-columns: 1fr;
  }
}

/* ---------- toc ---------- */

nav.toc {
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  padding: 0.6rem 1rem;
  margin: 1.2rem 0 1.5rem;
  font-size: 0.93rem;
}

nav.toc h2 {
  font-size: 0.95rem;
  margin: 0.2rem 0 0.3rem;
  padding: 0;
  border: 0;
}

nav.toc ol {
  margin: 0;
  padding-left: 1.3rem;
}

/* ---------- figure ---------- */

figure.diagram {
  margin: 1.2rem 0;
}

figure.diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 40rem;
}

figure.diagram figcaption {
  font-size: 0.88rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

.svg-text {
  fill: var(--text);
  font-family: inherit;
}

.svg-muted {
  fill: var(--muted);
}

.svg-box {
  fill: var(--surface);
  stroke: var(--border);
}

.svg-up {
  stroke: var(--up);
  fill: var(--up-soft);
}

.svg-down {
  stroke: var(--down);
  fill: var(--down-soft);
}

.svg-line {
  stroke: var(--muted);
  fill: none;
}

/* ---------- footer ---------- */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface);
  font-size: 0.88rem;
  color: var(--muted);
}

.site-footer .inner {
  max-width: var(--wide);
  margin: 0 auto;
  padding: 1.2rem 16px 2rem;
}

.site-footer ul {
  list-style: none;
  padding: 0;
  margin: 0 0 0.6rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem 1.2rem;
}

.site-footer a {
  color: var(--muted);
}

/* ---------- banner for pages kept with v1 vocabulary ---------- */

.v1-banner {
  max-width: 64rem;
  margin: 0 auto;
  padding: 0.7rem 16px;
  background: var(--down-soft);
  color: var(--text);
  border-bottom: 1px solid var(--border);
  font-family: system-ui, -apple-system, "Segoe UI", "Hiragino Sans", "Yu Gothic UI", "Noto Sans JP", sans-serif;
  font-size: 0.92rem;
  line-height: 1.6;
}

.v1-banner a {
  color: var(--accent);
}

@media print {
  .site-header,
  .site-nav,
  .site-footer,
  nav.toc {
    display: none;
  }
}