/* park13 — brand tokens (BRAND.md) */
:root {
  --paper: #F7F8F7;
  --ink: #191A18;
  --graphite: #6B6E69;
  --hairline: #E2E4E0;
  --teal: #2E6E7E;
  --max: 1080px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
  --font-en: "Space Grotesk", system-ui, sans-serif;
  --font-ja: "IBM Plex Sans JP", "Hiragino Sans", "Noto Sans JP", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-en);
  font-weight: 400;
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

html[lang="ja"] body {
  font-family: var(--font-ja);
  line-height: 1.9;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--teal); text-decoration-thickness: 1px; text-underline-offset: 0.15em; }
a:hover { color: var(--ink); }
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: var(--paper);
  padding: 0.5rem 1rem;
  z-index: 100;
}
.skip:focus { left: var(--pad); top: 0.5rem; }

.wrap {
  width: min(100% - 2 * var(--pad), var(--max));
  margin-inline: auto;
}

/* —— header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--hairline);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.5rem;
  padding-block: 0.65rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--ink);
  text-decoration: none;
  font-weight: 500;
  letter-spacing: -0.02em;
}
.brand img, .brand svg { width: 28px; height: 28px; flex-shrink: 0; }
.brand-name { font-size: 1.05rem; }

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: none;
}
.nav a {
  color: var(--graphite);
  text-decoration: none;
}
.nav a:hover { color: var(--ink); }
.nav .lang {
  color: var(--teal);
  border-left: 1px solid var(--hairline);
  padding-left: 1rem;
  margin-left: 0.25rem;
}

/* —— sections —— */
.section {
  padding-block: clamp(3rem, 8vw, 5.5rem);
}
.section + .section { border-top: 1px solid var(--hairline); }
.section-ink {
  background: var(--ink);
  color: var(--paper);
  border-top: none;
}
.section-ink a { color: color-mix(in srgb, var(--paper) 85%, var(--teal)); }
.section-ink a:hover { color: var(--paper); }
.section-ink .muted { color: color-mix(in srgb, var(--paper) 55%, transparent); }
.section-ink .hair { border-color: color-mix(in srgb, var(--paper) 14%, transparent); }

.idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  margin: 0 0 0.75rem;
}
.section-ink .idx { color: color-mix(in srgb, var(--paper) 45%, transparent); }

h1, h2, h3 {
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.25;
  margin: 0 0 1rem;
}
html[lang="ja"] h1,
html[lang="ja"] h2,
html[lang="ja"] h3 { line-height: 1.4; letter-spacing: 0; }

h1 {
  font-size: clamp(1.75rem, 4.2vw, 2.65rem);
  max-width: 18ch;
}
html[lang="ja"] h1 { max-width: 12em; font-size: clamp(1.55rem, 3.8vw, 2.25rem); }

h2 {
  font-size: clamp(1.35rem, 2.8vw, 1.75rem);
  max-width: 28ch;
}
html[lang="ja"] h2 { max-width: 18em; }

h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}

p { margin: 0 0 1rem; max-width: 62ch; }
.lede { color: var(--graphite); max-width: 48ch; }
.section-ink .lede { color: color-mix(in srgb, var(--paper) 62%, transparent); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  margin: 0 0 1rem;
}

/* —— hero —— */
.hero .wrap {
  display: grid;
  gap: 2.5rem;
  align-items: start;
}
@media (min-width: 880px) {
  .hero .wrap {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 3rem;
    align-items: center;
  }
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  margin-top: 1.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.15rem;
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid var(--ink);
}
.btn:hover { background: var(--teal); border-color: var(--teal); color: var(--paper); }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: transparent;
  padding-inline: 0.25rem;
  text-decoration: underline;
  text-underline-offset: 0.2em;
}
.btn-ghost:hover { color: var(--teal); background: transparent; }
.section-ink .btn {
  background: var(--paper);
  color: var(--ink);
  border-color: var(--paper);
}
.section-ink .btn:hover {
  background: var(--teal);
  border-color: var(--teal);
  color: var(--paper);
}
.section-ink .btn-ghost { color: var(--paper); }

/* sample report card */
.card {
  border: 1px solid var(--hairline);
  background: var(--paper);
  padding: 1.25rem 1.35rem;
}
.card-kicker {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  margin-bottom: 0.85rem;
}
.card-title {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  margin: 0 0 1rem;
  color: var(--ink);
}
.card-title .sys { color: var(--teal); }
.card-rows {
  display: grid;
  gap: 0.65rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
.card-rows li {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 0.75rem;
  font-size: 0.9rem;
  border-top: 1px solid var(--hairline);
  padding-top: 0.65rem;
}
.card-rows .k {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  padding-top: 0.15rem;
}
.stamp {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.15rem 0.45rem;
  border: 1px solid color-mix(in srgb, #B8860B 55%, var(--hairline));
  color: color-mix(in srgb, #8B6914 80%, var(--ink));
  background: color-mix(in srgb, #B8860B 8%, var(--paper));
}

/* —— grids —— */
.doors {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}
@media (min-width: 720px) {
  .doors { grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
}
.door {
  border-top: 1px solid var(--hairline);
  padding-top: 1rem;
}
.door .n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  margin-bottom: 0.5rem;
}
.door p { font-size: 0.95rem; color: var(--graphite); margin: 0; }
.footnote {
  margin-top: 1.75rem;
  font-size: 0.9rem;
  color: var(--graphite);
  max-width: 62ch;
}

.scope {
  display: grid;
  gap: 0;
  margin-top: 2rem;
  border-top: 1px solid var(--hairline);
}
@media (min-width: 720px) {
  .scope { grid-template-columns: 1fr 1fr; }
}
.scope-item {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--hairline);
}
@media (min-width: 720px) {
  .scope-item:nth-child(odd) { padding-right: 1.5rem; }
  .scope-item:nth-child(even) { padding-left: 1.5rem; border-left: 1px solid var(--hairline); }
}
.scope-item .n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
  margin-bottom: 0.35rem;
}
.scope-item p { margin: 0; color: var(--graphite); font-size: 0.95rem; }

.split {
  display: grid;
  gap: 2rem;
  margin-top: 2rem;
}
@media (min-width: 720px) {
  .split { grid-template-columns: 1fr 1fr; gap: 3rem; }
}
.split h3 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  font-weight: 400;
  color: var(--graphite);
  margin-bottom: 0.85rem;
}
ul.clean {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.65rem;
}
ul.clean li {
  padding-left: 1rem;
  position: relative;
  font-size: 0.95rem;
  color: var(--graphite);
}
ul.clean li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 0.35rem;
  height: 0.35rem;
  background: var(--teal);
}
.note {
  margin-top: 1.25rem;
  font-size: 0.88rem;
  color: var(--graphite);
  max-width: 48ch;
}
.cred {
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--hairline);
  max-width: 52ch;
  color: var(--graphite);
  font-size: 0.98rem;
}

.contact-block p { max-width: 48ch; }
.mail {
  display: inline-block;
  margin-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.02em;
}

/* —— footer —— */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding-block: 2rem 2.5rem;
  font-size: 0.88rem;
  color: var(--graphite);
}
.site-footer .wrap {
  display: grid;
  gap: 0.75rem;
}
.site-footer strong {
  color: var(--ink);
  font-weight: 500;
}
.site-footer .legal {
  font-size: 0.8rem;
  max-width: 62ch;
}

.muted { color: var(--graphite); }

/* —— copy-pass additions —— */
.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem 1.1rem;
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--graphite);
}
.hero .note { margin-top: 1rem; max-width: 48ch; }

.exp {
  display: grid;
  gap: 1.25rem;
  margin-top: 2rem;
}
@media (min-width: 720px) {
  .exp { grid-template-columns: 1fr 1fr; gap: 1.5rem 2rem; }
}

.block-list { margin-top: 1.25rem; max-width: 58ch; }
.example {
  margin-top: 1.5rem;
  padding: 1rem 1.15rem;
  border: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--graphite);
  line-height: 1.6;
  max-width: 58ch;
}

.nav {
  max-width: min(100%, 42rem);
}
@media (max-width: 900px) {
  .nav a:not(.lang) { display: none; }
  .nav .lang { border-left: none; padding-left: 0; margin-left: 0; }
}