/* Isegoria — editorial system. One stylesheet for the whole site. */

/* ---------- tokens ---------- */
:root {
  color-scheme: light dark;

  /* ground & ink */
  --paper:      light-dark(#faf8f4, #12100e);
  --paper-sunk: light-dark(#f3f0e9, #191714);
  --ink:        light-dark(#1b1917, #ece7df);
  --ink-soft:   light-dark(#5d574f, #a49c91);
  --ink-faint:  light-dark(#736c62, #918879);
  --rule:       light-dark(#e0dad0, #2b2724);
  --rule-firm:  light-dark(#c9c1b4, #3d3833);
  --accent:     light-dark(#8a4b26, #d99a68);

  /* type */
  --serif: "Newsreader", ui-serif, Georgia, "Times New Roman", serif;
  --sans:  "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --jp:    "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;

  /* measure */
  --page: 68rem;
  --gutter: clamp(1.25rem, 5vw, 4rem);
}

:lang(ja) { --serif: var(--jp); line-break: strict; word-break: normal; overflow-wrap: normal; }

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.6;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

:lang(ja) body, body:lang(ja) { line-height: 1.85; }

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .18em; }
h1, h2, h3, h4 { font-weight: 400; letter-spacing: -.02em; line-height: 1.08; margin: 0; }
p { margin: 0; }
::selection { background: light-dark(#e7ddcd, #3a322a); }

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

.skip { position: absolute; left: -9999px; }
.skip:focus { left: var(--gutter); top: 1rem; z-index: 60; padding: .7rem 1.1rem; background: var(--paper); border: 1px solid var(--ink); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }

/* ---------- shared layout ---------- */
.wrap { width: min(var(--page), 100% - var(--gutter) * 2); margin-inline: auto; }

/* small caps label — the one sans element in the system */
.label {
  font-family: var(--sans);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-faint);
  font-feature-settings: "tnum";
}
:lang(ja) .label { letter-spacing: .1em; }

/* ---------- header ---------- */
.site-header {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 1.5rem; flex-wrap: wrap;
  padding: 1.9rem 0 1.6rem;
}
.wordmark {
  font-family: var(--serif);
  font-size: 1.2rem; letter-spacing: .005em;
  text-decoration: none; white-space: nowrap;
}
.wordmark em { font-style: italic; }
.site-nav { display: flex; gap: 1.5rem; align-items: baseline; flex-wrap: wrap; }
.site-nav a {
  font-family: var(--sans); font-size: .8125rem; letter-spacing: .01em;
  color: var(--ink-soft); text-decoration: none;
  padding-bottom: .15rem; border-bottom: 1px solid transparent;
}
.site-nav a:hover { color: var(--ink); border-bottom-color: var(--rule-firm); }
.site-nav a[aria-current] { color: var(--ink); border-bottom-color: var(--ink); }
.site-nav a[lang="ja"], .site-nav a[lang="en"] { font-family: var(--sans); }

/* ---------- hero ---------- */
.hero { padding: clamp(3.25rem, 9vw, 7rem) 0 clamp(3rem, 7vw, 5.25rem); max-width: 46ch; }

/* intro hero: name + description beside the portrait */
.hero-intro {
  max-width: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(11.5rem, 19vw, 15rem);
  gap: clamp(2rem, 4vw, 3.25rem);
  align-items: center;
}
.hero-intro .hero-text { max-width: none; }
.hero-intro h1 {
  font-size: clamp(2rem, 4.15vw, 3.15rem);
  line-height: 1.07;
  letter-spacing: -.032em;
  margin: .85rem 0 0;
  text-wrap: nowrap;
}
.hero-intro .deck { max-width: 44ch; font-size: 1.0625rem; margin-top: 1.15rem; }

/* bio: full-width headline, then prose and portrait sharing the row below */
.bio { max-width: none; }
.bio h1 {
  font-size: clamp(2.1rem, 4.6vw, 3.4rem);
  line-height: 1.06; letter-spacing: -.032em;
  margin: .85rem 0 0; text-wrap: balance;
}
.bio-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) clamp(11.5rem, 19vw, 15rem);
  gap: clamp(2rem, 4vw, 3.25rem);
  align-items: start;
  margin-top: 1.9rem;
}
.bio-body .deck { max-width: 62ch; font-size: 1.0625rem; }
.bio-body .deck + .deck { margin-top: .95rem; }
.bio-body .portrait { margin-top: .3rem; }
:lang(ja) .bio h1 { font-size: clamp(1.75rem, 3.4vw, 2.5rem); line-height: 1.22; }
/* ch is sized on Latin glyphs; Japanese needs an em-based measure */
:lang(ja) .bio-body .deck, :lang(ja) .hero .deck { max-width: 33em; }
@media (max-width: 860px) {
  .bio-body { grid-template-columns: 1fr; gap: 2rem; }
  .bio-body .portrait { max-width: 11.5rem; }
}
.portrait { margin: 0; }
.portrait img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  filter: grayscale(1);
  background: var(--paper-sunk);
}
:root:not([data-theme="light"]) .portrait img { filter: grayscale(1) brightness(.9) contrast(1.02); }
@media (prefers-color-scheme: light) { :root:not([data-theme="dark"]) .portrait img { filter: grayscale(1); } }
.portrait figcaption {
  margin-top: .7rem;
  font-family: var(--sans); font-size: .6875rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-faint);
}
.hero h1 {
  font-size: clamp(2.9rem, 7.5vw, 5.25rem);
  line-height: 1.02;
  letter-spacing: -.035em;
  margin: 1.1rem 0 0;
  text-wrap: balance;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.hero .deck {
  margin-top: 1.5rem; max-width: 45ch;
  font-size: 1.1875rem; color: var(--ink-soft);
  text-wrap: pretty;
}
:lang(ja) .hero { max-width: 40rem; }
:lang(ja) .hero-intro, :lang(ja) .hero.bio { max-width: none; }
:lang(ja) .hero-intro h1 { font-size: clamp(1.85rem, 3.8vw, 2.9rem); line-height: 1.14; }
:lang(ja) .hero h1 { font-size: clamp(1.9rem, 4.6vw, 3.05rem); line-height: 1.3; letter-spacing: .005em; }
:lang(ja) .hero .deck { max-width: 34rem; }

/* ---------- section ---------- */
.section { padding: clamp(2.75rem, 5.5vw, 4.25rem) 0 clamp(2.25rem, 4.5vw, 3.25rem); border-top: 1px solid var(--rule-firm); }
.section-head {
  display: grid; grid-template-columns: minmax(0, 1fr) auto;
  align-items: baseline; gap: 1rem 2rem;
  margin-bottom: 2.25rem;
}
.section-head h2 { font-size: clamp(1.5rem, 2.6vw, 1.95rem); letter-spacing: -.025em; }
.section-head .label { justify-self: end; text-align: right; }
.section-head .label a { color: inherit; text-decoration: none; border-bottom: 1px solid var(--rule-firm); }
.section-head .label a:hover { color: var(--ink); }
.section-note { grid-column: 1 / -1; max-width: 52ch; color: var(--ink-soft); margin-top: -.4rem; }

/* ---------- index list: the core pattern ---------- */
.index { border-top: 1px solid var(--rule); counter-reset: row; }
.index > a, .index > article {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 17rem) minmax(0, 1fr);
  gap: 0 1.75rem;
  align-items: baseline;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule);
  text-decoration: none;
  transition: background-color .18s ease;
}
.index > a { margin-inline: calc(var(--gutter) / -3); padding-inline: calc(var(--gutter) / 3); }
.index > a:hover { background: var(--paper-sunk); }
.index > a::before {
  counter-increment: row;
  content: counter(row, decimal-leading-zero);
  font-family: var(--sans); font-size: .6875rem; letter-spacing: .1em;
  color: var(--ink-faint); font-feature-settings: "tnum";
}
.index .t { font-size: 1.125rem; letter-spacing: -.012em; text-wrap: balance; }
.index > a:hover .t { color: var(--accent); }
.index .d { color: var(--ink-soft); font-size: .9875rem; text-wrap: pretty; }
.index .tail {
  grid-column: 3; justify-self: start;
  margin-top: .35rem;
  font-family: var(--sans); font-size: .6875rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--ink-faint);
}
.index .tail span + span::before { content: "·"; margin: 0 .5rem; }

/* two-column reading list for prose sections */
.prose-cols { columns: 2; column-gap: 3rem; max-width: 58rem; }
.prose-cols p { break-inside: avoid; margin-bottom: 1rem; }

/* ---------- numbered principles (about) ---------- */
.principles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; border-top: 1px solid var(--rule); }
.principles article { padding: 2rem 2rem 2rem 0; border-bottom: 1px solid var(--rule); }
.principles article:nth-child(even) { padding-left: 2rem; border-left: 1px solid var(--rule); }
.principles h3 { font-size: 1.3rem; margin: .55rem 0 .6rem; letter-spacing: -.02em; }
.principles p { color: var(--ink-soft); max-width: 34ch; }

/* ---------- pull statement ---------- */
.statement { padding: clamp(3.5rem, 8vw, 6rem) 0; border-top: 1px solid var(--rule-firm); }
.statement blockquote {
  margin: 1.2rem 0 0;
  font-size: clamp(1.65rem, 4vw, 2.85rem);
  line-height: 1.16; letter-spacing: -.03em;
  max-width: 24ch; text-wrap: balance;
}
.statement blockquote em { font-style: italic; color: var(--accent); }
.statement .after { margin-top: 1.75rem; max-width: 46ch; color: var(--ink-soft); }
:lang(ja) .statement blockquote { font-size: clamp(1.4rem, 3.4vw, 2.15rem); line-height: 1.5; letter-spacing: 0; max-width: 22ch; }

/* ---------- inline link ---------- */
.link {
  font-family: var(--sans); font-size: .8125rem;
  color: var(--ink); text-decoration: none;
  border-bottom: 1px solid var(--accent); padding-bottom: .18rem;
}
.link:hover { color: var(--accent); }
.links-row { display: flex; gap: 1.5rem; flex-wrap: wrap; margin-top: 2rem; }

/* ---------- search + filter (projects) ---------- */
.controls { display: flex; gap: 1.25rem 2rem; align-items: baseline; flex-wrap: wrap; margin-bottom: 1.5rem; }
.search-field { flex: 1 1 16rem; display: flex; align-items: center; gap: .6rem; border-bottom: 1px solid var(--rule-firm); padding-bottom: .5rem; }
.search-field svg { width: 15px; height: 15px; flex: none; fill: none; stroke: var(--ink-faint); stroke-width: 1.6; }
.search-field input {
  flex: 1; min-width: 0; border: 0; background: none; color: var(--ink);
  font-family: var(--serif); font-size: 1rem; padding: 0;
}
.search-field input::placeholder { color: var(--ink-faint); }
.search-field input:focus { outline: none; }
.search-field:focus-within { border-bottom-color: var(--accent); }
.filters { display: flex; gap: .35rem; flex-wrap: wrap; }
.filters button {
  font-family: var(--sans); font-size: .75rem;
  background: none; border: 1px solid var(--rule-firm); border-radius: 999px;
  color: var(--ink-soft); padding: .3rem .8rem; cursor: pointer;
  transition: all .15s ease;
}
.filters button:hover { color: var(--ink); border-color: var(--ink-faint); }
.filters button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.count { color: var(--ink-faint); font-family: var(--sans); font-size: .75rem; letter-spacing: .06em; text-transform: uppercase; margin-bottom: .5rem; }
.no-results { padding: 3rem 0; color: var(--ink-soft); }
.no-results button { margin-top: 1rem; font-family: var(--sans); font-size: .8125rem; background: none; border: 0; border-bottom: 1px solid var(--accent); color: var(--ink); padding: 0 0 .18rem; cursor: pointer; }

/* repo rows reuse .index with a language tail */
.index [data-project][hidden] { display: none; }

/* ---------- error page ---------- */
.error { min-height: 80svh; display: grid; align-content: center; gap: 1.25rem; max-width: 40ch; }
.error .code { font-family: var(--sans); font-size: .75rem; letter-spacing: .2em; color: var(--ink-faint); }
.error h1 { font-size: clamp(2.2rem, 6vw, 3.4rem); letter-spacing: -.035em; }
.error p { color: var(--ink-soft); }

/* ---------- footer ---------- */
.site-footer {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 1rem 2rem; flex-wrap: wrap;
  padding: 2.5rem 0 3.5rem; border-top: 1px solid var(--rule-firm);
  font-family: var(--sans); font-size: .78125rem; color: var(--ink-faint);
}
.site-footer a { color: var(--ink-soft); text-decoration: none; }
.site-footer a:hover { color: var(--ink); }
.site-footer nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }

/* ---------- responsive ---------- */
@media (max-width: 1000px) {
  .hero-intro { grid-template-columns: 1fr; gap: 2rem; }
  .hero-intro .portrait { max-width: 11.5rem; }
  .hero-intro h1 { text-wrap: balance; }
}
@media (max-width: 860px) {
  .index > a, .index > article { grid-template-columns: 2.25rem minmax(0, 1fr); gap: 0 1.25rem; }
  .index .d { grid-column: 2; margin-top: .3rem; }
  .index .tail { grid-column: 2; }
  .principles { grid-template-columns: 1fr; }
  .principles article, .principles article:nth-child(even) { padding: 1.6rem 0; border-left: 0; }
  .prose-cols { columns: 1; }
}
@media (max-width: 560px) {
  body { font-size: 1rem; }
  .site-header { padding: 1.4rem 0 1.1rem; }
  .site-nav { gap: 1rem; }
  .index > a, .index > article { grid-template-columns: 1fr; }
  .index > a::before { display: none; }
  .index .d, .index .tail { grid-column: 1; }
  .hero { padding-top: 3.25rem; }
  .section-head { grid-template-columns: 1fr; }
  .section-head .label { justify-self: start; text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

@media print {
  body { background: #fff; color: #000; }
  .site-nav, .controls, .site-footer nav { display: none; }
}