/* ============================================================
   Suguru Shimomura — personal site
   Palette: paper white / warm ink / amber light
   Type:    Space Grotesk (display) · IBM Plex Sans (body)
            IBM Plex Mono (dates, labels)
   ============================================================ */

:root {
  --bg:        #0e1630;   /* deep navy */
  --surface:   #16203f;   /* raised navy */
  --ink:       #eef1f8;   /* near-white text */
  --muted:     #9aa6c4;   /* muted blue-gray */
  --line:      #283358;   /* hairline */
  --amber:     #e8b25c;   /* light accent (links) */
  --amber-hi:  #f0c578;   /* brighter accent */
  --maxw:      920px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scrollbar-gutter: stable;        /* 全ページで縦スクロールバー分の余白を確保し横ずれを防ぐ */
}
/* scrollbar-gutter 非対応ブラウザ向けフォールバック: 常に縦スクロールバーを表示 */
@supports not (scrollbar-gutter: stable) {
  html { overflow-y: scroll; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation: none !important; transition: none !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "IBM Plex Sans", "IBM Plex Sans JP", "Hiragino Kaku Gothic ProN",
               "Noto Sans JP", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--amber); text-decoration: none; }
a:hover { text-decoration: underline; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ---------- header ---------- */
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--bg);
}
.site-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px 24px;
}
.site-name {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--ink);
}
.site-name:hover { text-decoration: none; color: var(--amber); }
nav.site-nav { display: flex; gap: 22px; flex-wrap: wrap; }
nav.site-nav a {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-transform: uppercase;
  border-bottom: 2px solid transparent;
  padding-bottom: 2px;
}
nav.site-nav a:hover { color: var(--amber); text-decoration: none; }
nav.site-nav a[aria-current="page"] {
  color: var(--ink);
  border-bottom-color: var(--amber-hi);
}

/* ---------- layout ---------- */
main {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 36px 20px 80px;
}

h1.page-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0 0 28px;
}

h2.sec {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  margin: 44px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
h2.sec:first-of-type { margin-top: 0; }

/* ---------- hero (index) ---------- */
.hero { padding-top: 4px; }
.hero h1 {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(2rem, 6vw, 3.1rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.15;
  margin: 0;
}
.hero .role {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 14px 0 4px;
}
.hero .affil { color: var(--muted); margin: 0; }
.hero .links {
  margin: 18px 0 0;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}
.hero-vis {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--surface);
}
.hero-vis img { display: block; width: 100%; height: auto; }
.hero-vis figcaption {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  padding: 8px 12px;
  border-top: 1px solid var(--line);
  background: var(--surface);
}

/* ---------- news ---------- */
.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}
.news-date {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
  padding-top: 2px;
}
.news-tag {
  display: inline-block;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--amber);
  border: 1px solid var(--amber-hi);
  border-radius: 3px;
  padding: 0 6px;
  margin-right: 8px;
  vertical-align: 2px;
}
.news-body { min-width: 0; }
.news-body .venue { color: var(--muted); font-size: 0.92rem; }
@media (max-width: 560px) {
  .news-list li { grid-template-columns: 1fr; gap: 2px; }
}

/* ---------- achievements ---------- */
details.year {
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-bottom: 14px;
  background: var(--bg);
}
details.year > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 14px 18px;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.25rem;
  font-weight: 600;
}
details.year > summary::-webkit-details-marker { display: none; }
details.year > summary::after {
  content: "+";
  margin-left: auto;
  color: var(--amber);
  font-weight: 400;
}
details.year[open] > summary::after { content: "−"; }
details.year > summary .count {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--muted);
}
details.year[open] > summary { border-bottom: 1px solid var(--line); }
.year-body { padding: 6px 18px 18px; }
.year-body h3 {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 26px 0 4px;
}
.entry {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}
.entry:last-child { border-bottom: none; }
.entry .date {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--muted);
  white-space: nowrap;
  padding-top: 3px;
}
.entry .title { font-weight: 600; }
.entry .authors { font-size: 0.93rem; }
.entry .authors u { text-decoration-color: var(--amber-hi); text-underline-offset: 3px; }
.entry .venue { font-size: 0.9rem; color: var(--muted); }
.entry .venue a { word-break: break-all; }
@media (max-width: 560px) {
  .entry { grid-template-columns: 1fr; gap: 2px; }
}

/* ---------- information ---------- */
.info-row {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 16px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}
.info-row .when {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
  color: var(--muted);
  padding-top: 3px;
}
.info-row .what b, .info-row .what strong { display: block; }
.info-row .what span { color: var(--muted); font-size: 0.93rem; }
@media (max-width: 560px) {
  .info-row { grid-template-columns: 1fr; gap: 2px; }
}
ul.plain { list-style: none; padding: 0; margin: 0; }
ul.plain li { padding: 6px 0; }

/* ---------- work (photo grid) ---------- */
.work-title {
  font-family: "Space Grotesk", sans-serif;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  margin: 36px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
.work-title:first-child { margin-top: 0; }
.work-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 18px;
}
.work-card {
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  background: var(--bg);
}
.work-card img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.empty-note {
  border: 1px dashed var(--line);
  border-radius: 6px;
  padding: 22px;
  color: var(--muted);
  background: var(--surface);
  font-size: 0.92rem;
}

/* ---------- footer ---------- */
footer.site {
  border-top: 1px solid var(--line);
  margin-top: 40px;
}
footer.site .site-inner {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.05em;
}

/* loading shimmer */
.loading { color: var(--muted); font-family: "IBM Plex Mono", monospace; font-size: 0.85rem; }

/* links row at the bottom of the top page */
.bottom-links {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.8rem;
}

/* interactive wavefield canvas */
#wavefield {
  display: block;
  width: 100%;
  height: 340px;
  cursor: crosshair;
  touch-action: none;
  background: var(--surface);
}