/* Olivier Nourry — personal site. Dependency-free, responsive, light/dark. */

:root {
  --fg: #17212b;
  --fg-muted: #5b6673;
  --bg: #fbfcfc;
  --bg-soft: #f1f5f5;
  --surface: #ffffff;
  --border: #e1e7e8;
  --accent: #0f6e66;
  --accent-deep: #0a524c;
  --accent-soft: #e3f2ef;
  --accent-ring: #b9ddd7;
  --glow-1: rgba(15, 110, 102, 0.08);
  --glow-2: rgba(56, 132, 196, 0.06);
  --header-bg: rgba(251, 252, 252, 0.85);
  --code-bg: #14202a;
  --code-fg: #d9e2ea;

  /* Publication type tints */
  --t-journal: #e8f5ee;
  --t-conference: #fdf3e3;
  --t-workshop: #edf1fd;
  --t-preprint: #f2eefc;
  --t-domestic: #eef2f5;

  --maxw: 880px;
  --radius: 12px;
  --shadow-1: 0 1px 2px rgba(20, 30, 40, 0.05);
  --shadow-2: 0 10px 28px -14px rgba(20, 30, 40, 0.28);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --fg: #e4eaee;
    --fg-muted: #9aa7b2;
    --bg: #0f1519;
    --bg-soft: #172026;
    --surface: #141c21;
    --border: #253139;
    --accent: #4fc1b2;
    --accent-deep: #7fd8cc;
    --accent-soft: #15302d;
    --accent-ring: #24534d;
    --glow-1: rgba(79, 193, 178, 0.08);
    --glow-2: rgba(90, 150, 220, 0.06);
    --header-bg: rgba(15, 21, 25, 0.82);
    --code-bg: #0a0f12;
    --t-journal: #142820;
    --t-conference: #2a2216;
    --t-workshop: #18203a;
    --t-preprint: #221c34;
    --t-domestic: #1a2228;
    --shadow-2: 0 10px 28px -14px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --fg: #e4eaee;
  --fg-muted: #9aa7b2;
  --bg: #0f1519;
  --bg-soft: #172026;
  --surface: #141c21;
  --border: #253139;
  --accent: #4fc1b2;
  --accent-deep: #7fd8cc;
  --accent-soft: #15302d;
  --accent-ring: #24534d;
  --glow-1: rgba(79, 193, 178, 0.08);
  --glow-2: rgba(90, 150, 220, 0.06);
  --header-bg: rgba(15, 21, 25, 0.82);
  --code-bg: #0a0f12;
  --t-journal: #142820;
  --t-conference: #2a2216;
  --t-workshop: #18203a;
  --t-preprint: #221c34;
  --t-domestic: #1a2228;
  --shadow-2: 0 10px 28px -14px rgba(0, 0, 0, 0.6);
  color-scheme: dark;
}

* { box-sizing: border-box; }

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

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

body {
  margin: 0;
  color: var(--fg);
  background:
    radial-gradient(56rem 22rem at 10% -8rem, var(--glow-1), transparent 68%),
    radial-gradient(48rem 20rem at 92% -10rem, var(--glow-2), transparent 66%),
    var(--bg);
  background-repeat: no-repeat;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", Meiryo, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: break-word;
}

::selection { background: var(--accent-soft); }

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

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

a:hover {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip {
  position: absolute;
  left: -999px;
  top: 8px;
  z-index: 20;
  padding: 6px 12px;
  background: var(--surface);
  border-radius: 8px;
}

.skip:focus { left: 12px; }

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

/* ---- Header / navigation ---- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-nav {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 56px;
}

.site-nav .brand {
  margin-right: auto;
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--fg);
}

.site-nav .brand:hover {
  color: var(--accent-deep);
  text-decoration: none;
}

.nav-links {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0;
  padding: 0;
}

.nav-links a {
  display: inline-block;
  padding: 6px 10px;
  border-radius: 8px;
  color: var(--fg-muted);
  font-size: 0.95rem;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-links a:hover {
  background: var(--bg-soft);
  color: var(--fg);
  text-decoration: none;
}

.nav-links a.active {
  color: var(--accent-deep);
  background: var(--accent-soft);
  font-weight: 600;
}

/* Light/dark toggle: a half-filled circle drawn in CSS. */
.theme-toggle {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-left: 4px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
}

.theme-toggle::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  border: 1.5px solid var(--fg-muted);
  background: linear-gradient(90deg, var(--fg-muted) 50%, transparent 50%);
}

.theme-toggle:hover { background: var(--bg-soft); }

.nav-toggle,
.nav-toggle-label { display: none; }

@media (max-width: 680px) {
  .site-nav { flex-wrap: wrap; }
  .nav-toggle-label {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    cursor: pointer;
  }
  .nav-toggle-label span,
  .nav-toggle-label span::before,
  .nav-toggle-label span::after {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--fg);
    border-radius: 1px;
    position: relative;
    content: "";
  }
  .nav-toggle-label span::before { position: absolute; top: -6px; }
  .nav-toggle-label span::after { position: absolute; top: 6px; }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    padding: 4px 0 12px;
  }
  .nav-links a { display: block; }
  .nav-toggle:checked ~ .nav-links { display: flex; }
  .theme-toggle { margin: 6px 0 0 10px; }
}

/* ---- Layout ---- */
.container {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 36px 20px 56px;
}

section { margin: 0 0 36px; }

h1, h2, h3 { text-wrap: balance; }

h1 {
  font-size: clamp(1.9rem, 4.5vw, 2.35rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 0 0 0.5em;
}

h2 {
  position: relative;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 1.8em 0 0.7em;
  padding-bottom: 0.35em;
  border-bottom: 1px solid var(--border);
  scroll-margin-top: 72px;
}

h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 2.4em;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

section:first-child h2,
h1 + h2 { margin-top: 0.8em; }

h3 {
  font-size: 1.1rem;
  margin: 0;
}

.lede { color: var(--fg-muted); margin-top: -0.4em; }

.name-ja {
  font-size: 0.55em;
  font-weight: 500;
  color: var(--fg-muted);
  letter-spacing: 0;
  white-space: nowrap;
}

h3 .name-ja { font-size: 0.8em; }

/* ---- Hero ---- */
.hero {
  display: flex;
  gap: 32px;
  align-items: center;
  flex-wrap: wrap;
  margin: 8px 0 12px;
}

.hero img {
  width: 148px;
  height: 148px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--surface), 0 0 0 5px var(--border), var(--shadow-2);
}

.hero-body { flex: 1 1 320px; }

.hero-body h1 { margin: 0 0 0.2em; }

.hero-affil {
  color: var(--fg-muted);
  margin: 0 0 1em;
  line-height: 1.55;
}

.hero-affil a { color: inherit; }
.hero-affil a:hover { color: var(--accent-deep); }

.hero-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.hero-icons a {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--bg-soft);
  border: 1px solid var(--border);
  transition: background-color 0.15s ease, border-color 0.15s ease,
    transform 0.15s ease, box-shadow 0.15s ease;
}

.hero-icons a::before {
  content: "";
  width: 18px;
  height: 18px;
  background-color: var(--fg-muted);
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
  transition: background-color 0.15s ease;
}

.hero-icons a:hover {
  background: var(--accent-soft);
  border-color: var(--accent-ring);
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.hero-icons a:hover::before { background-color: var(--accent-deep); }

@media (max-width: 560px) {
  .hero { gap: 20px; }
  .hero img { width: 112px; height: 112px; }
}

/* ---- Home: interests and news ---- */
ul.tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
}

ul.tags li {
  padding: 4px 12px;
  font-size: 0.9rem;
  background: var(--accent-soft);
  color: var(--accent-deep);
  border: 1px solid var(--accent-ring);
  border-radius: 999px;
}

ul.news {
  list-style: none;
  margin: 0;
  padding: 0;
}

ul.news li {
  display: grid;
  grid-template-columns: 5.5em minmax(0, 1fr);
  gap: 12px;
  padding: 6px 0;
  border-bottom: 1px dashed var(--border);
}

ul.news li:last-child { border-bottom: 0; }

.news-date {
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  padding-top: 0.1em;
}

/* ---- Definition lists (contact, career) ---- */
dl.contact,
dl.career {
  display: grid;
  grid-template-columns: max-content minmax(0, 1fr);
  gap: 6px 20px;
  margin: 0;
}

dl.contact dt,
dl.career dt {
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

dl.contact dt { font-weight: 600; }

dl.contact dd,
dl.career dd { margin: 0; }

dl.career dd { padding-bottom: 4px; }

@media (max-width: 560px) {
  dl.career { grid-template-columns: minmax(0, 1fr); gap: 0; }
  dl.career dd { margin-bottom: 10px; }
}

.callout {
  margin: 20px 0 0;
  padding: 14px 18px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-ring);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.callout p { margin: 0; }

/* ---- Teaching ---- */
ul.courses {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

li.course {
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-1);
}

.course-head {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: baseline;
  gap: 4px 16px;
}

.course-when {
  font-size: 0.85rem;
  color: var(--accent-deep);
  font-variant-numeric: tabular-nums;
}

.course-meta {
  margin: 2px 0 6px;
  font-size: 0.9rem;
  color: var(--fg-muted);
}

li.course p:last-child { margin-bottom: 0; }

/* ---- Publications ---- */
.pub-filter-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
}

#pub-filter {
  flex: 1 1 auto;
  min-width: 0;
  font: inherit;
  color: var(--fg);
  padding: 9px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--surface);
  box-shadow: var(--shadow-1);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

#pub-filter:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.pub-count {
  flex: 0 0 auto;
  font-size: 0.85rem;
  color: var(--fg-muted);
  font-variant-numeric: tabular-nums;
}

.pub-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 8px;
}

.pub-chip {
  font: inherit;
  font-size: 0.8rem;
  line-height: 1.6;
  color: var(--fg-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 11px;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.pub-chip .chip-n {
  font-variant-numeric: tabular-nums;
  opacity: 0.7;
  margin-left: 2px;
}

.pub-chip:hover,
.pub-chip.is-on {
  color: var(--accent-deep);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.h-count {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--fg-muted);
  margin-left: 4px;
}

ol.pubs {
  list-style: none;
  margin: 0;
  padding: 0;
}

li.pub {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 3px 14px;
  align-items: start;
  padding: 11px 14px;
  margin: 0 0 6px;
  border-radius: 10px;
  background: var(--tint, transparent);
  scroll-margin-top: 72px;
  transition: box-shadow 0.15s ease;
}

li.pub:hover { box-shadow: inset 0 0 0 1px var(--border); }

li.pub:target {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

li.pub-journal    { --tint: var(--t-journal); }
li.pub-conference { --tint: var(--t-conference); }
li.pub-workshop   { --tint: var(--t-workshop); }
li.pub-preprint   { --tint: var(--t-preprint); }
li.pub-domestic   { --tint: var(--t-domestic); }

.pub-body { min-width: 0; }

.pub-title {
  margin: 0;
  font-weight: 600;
  line-height: 1.4;
}

.pub-title a { color: var(--fg); }

.pub-title a:hover { color: var(--accent-deep); }

.pub-auth {
  margin: 3px 0 0;
  font-size: 0.87rem;
  line-height: 1.4;
}

.pub-auth em { font-style: normal; }

.pub-auth em.self {
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.pub-venue {
  margin: 3px 0 0;
  font-size: 0.82rem;
  line-height: 1.45;
  color: var(--fg-muted);
}

.venue-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  font-style: normal;
  letter-spacing: 0.01em;
  color: var(--fg);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 0 6px;
  margin-right: 2px;
  vertical-align: 0.05em;
}

.pub-note { font-style: normal; }

p.pub-award {
  margin: 4px 0 0;
  font-size: 0.85rem;
  color: var(--fg-muted);
}

.pub-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  padding-top: 2px;
}

ul.pub-icons {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
}

ul.pub-icons:empty { display: none; }

ul.pub-icons li { display: flex; }

.pub-ico {
  display: inline-block;
  width: 17px;
  height: 17px;
  background-color: var(--fg-muted);
  -webkit-mask: var(--icon) center / contain no-repeat;
  mask: var(--icon) center / contain no-repeat;
  transition: background-color 0.15s ease, transform 0.15s ease;
}

.pub-ico:hover {
  background-color: var(--accent-deep);
  transform: translateY(-1px);
}

.pub-link {
  font: inherit;
  font-size: 0.75rem;
  line-height: 1.6;
  color: var(--accent);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 0 8px;
  cursor: pointer;
  white-space: nowrap;
}

.pub-link:hover,
.pub-link[aria-expanded="true"] {
  background: var(--accent-soft);
  border-color: var(--accent-ring);
  color: var(--accent-deep);
}

.bib {
  grid-column: 1 / -1;
  position: relative;
  margin-top: 6px;
}

.bib pre {
  margin: 0;
  padding: 12px 14px;
  background: var(--code-bg);
  color: var(--code-fg);
  border-radius: 8px;
  font-size: 0.78rem;
  line-height: 1.5;
  overflow-x: auto;
  white-space: pre;
}

.copy-bib {
  position: absolute;
  top: 8px;
  right: 8px;
  font: inherit;
  font-size: 0.72rem;
  color: #c6d0dd;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 6px;
  padding: 1px 8px;
  cursor: pointer;
}

.copy-bib:hover { background: rgba(255, 255, 255, 0.16); }

@media (max-width: 640px) {
  li.pub { grid-template-columns: minmax(0, 1fr); }
  .pub-links {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    margin-top: 6px;
  }
}

/* ---- Footer ---- */
.site-footer {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 18px 20px 36px;
  border-top: 1px solid var(--border);
  color: var(--fg-muted);
  font-size: 0.82rem;
}

.site-footer p { margin: 0; }

[hidden] { display: none !important; }