/* ------------------------------------------------------------
   Tomoya Yamanokuchi — personal site
   Layout modelled on the al-folio academic template.
   ------------------------------------------------------------ */

:root {
  --bg: #ffffff;
  --ink: #1d2126;
  --muted: #5c6670;
  --rule: #e2e5e9;
  --accent: #0f6a5b;        /* deep teal: links, active nav, own name */
  --accent-soft: #e6f2ef;
  --tag-bg: #f2f4f6;
  --code-bg: #f6f8fa;
  --font: "Source Sans 3", "Hiragino Sans", "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #15181c;
    --ink: #e4e7ea;
    --muted: #9aa4ae;
    --rule: #2c3238;
    --accent: #5cc4ae;
    --accent-soft: #1c2f2b;
    --tag-bg: #22272d;
    --code-bg: #1d2126;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #15181c;
  --ink: #e4e7ea;
  --muted: #9aa4ae;
  --rule: #2c3238;
  --accent: #5cc4ae;
  --accent-soft: #1c2f2b;
  --tag-bg: #22272d;
  --code-bg: #1d2126;
  color-scheme: dark;
}

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

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 1.0625rem;
  line-height: 1.6;
}

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

img { max-width: 100%; height: auto; }

/* ---------- Navigation ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--bg);
  border-bottom: 1px solid var(--rule);
}
.nav-inner {
  max-width: 930px;
  margin: 0 auto;
  padding: 0 1.25rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 300;
}
.brand strong { font-weight: 600; }
.brand:hover { text-decoration: none; color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a { color: var(--ink); }
.nav-links a[aria-current="page"] { color: var(--accent); font-weight: 600; }
.nav-links a:hover { color: var(--accent); text-decoration: none; }

.icon-btn {
  background: none;
  border: 0;
  padding: 4px;
  color: var(--ink);
  cursor: pointer;
  display: inline-flex;
}
.icon-btn:hover { color: var(--accent); }
.icon-btn svg { width: 18px; height: 18px; }
.nav-toggle { display: none; }

@media (max-width: 640px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.25rem 1.25rem;
    background: var(--bg);
    border-bottom: 1px solid var(--rule);
  }
  .nav-links.open { display: flex; }
}

/* ---------- Page ---------- */

main {
  max-width: 930px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 3rem;
}

.page-title {
  font-size: 2.6rem;
  font-weight: 300;
  line-height: 1.15;
  margin: 0 0 0.35rem;
  letter-spacing: -0.01em;
}
.page-title strong { font-weight: 600; }
.page-desc {
  color: var(--muted);
  margin: 0 0 2rem;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin: 2.75rem 0 1rem;
  color: var(--accent);
}
h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin: 2rem 0 0.75rem;
}

hr { border: 0; border-top: 1px solid var(--rule); margin: 2rem 0; }

/* ---------- About ---------- */

.profile {
  float: right;
  width: 230px;
  margin: 0.25rem 0 1rem 2rem;
  text-align: center;
  font-size: 0.9rem;
  color: var(--muted);
  line-height: 1.45;
}
.profile img {
  display: block;
  width: 100%;
  border-radius: 4px;
  margin-bottom: 0.6rem;
}
.about-text p { margin: 0 0 1rem; max-width: 62ch; }
.clearfix::after { content: ""; display: table; clear: both; }

@media (max-width: 640px) {
  .profile { float: none; width: 180px; margin: 0 auto 1.5rem; }
  .page-title { font-size: 2.1rem; }
}

ul.plain { margin: 0; padding-left: 1.2rem; }
ul.plain li { margin-bottom: 0.25rem; }

/* ---------- News ---------- */

.news {
  width: 100%;
  border-collapse: collapse;
}
.news th, .news td {
  text-align: left;
  vertical-align: top;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule);
}
.news th {
  width: 7.5rem;
  font-weight: 600;
  white-space: nowrap;
  padding-right: 1rem;
}
.news tr:last-child th, .news tr:last-child td { border-bottom: 0; }

/* ---------- Publications ---------- */

.year-group { position: relative; }
.pub-list { list-style: none; margin: 0; padding: 0; }
.pub {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 1.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--rule);
}
.pub:last-child { border-bottom: 0; }
.pub.no-preview { grid-template-columns: 1fr; }
.pub-preview img {
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: 3px;
  background: #fff;
}
.pub-venue {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 3px;
  padding: 0.05rem 0.45rem;
  margin-bottom: 0.3rem;
}
.pub-title { font-weight: 600; line-height: 1.35; }
.pub-authors { margin-top: 0.2rem; }
.pub-authors .me { font-weight: 600; font-style: italic; color: var(--ink); }
.pub-meta { color: var(--muted); font-style: italic; margin-top: 0.15rem; }
.pub-note { color: var(--accent); font-weight: 600; font-style: normal; }

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.55rem;
}
.pub-links a, .pub-links button {
  font: inherit;
  font-size: 0.78rem;
  line-height: 1;
  padding: 0.38rem 0.6rem;
  border: 1px solid var(--ink);
  border-radius: 3px;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}
.pub-links a:hover, .pub-links button:hover,
.pub-links button[aria-expanded="true"] {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.pub-abstract, .pub-bibtex { margin-top: 0.75rem; }
.pub-abstract[hidden], .pub-bibtex[hidden] { display: none; }
.pub-abstract {
  font-size: 0.95rem;
  border-left: 3px solid var(--rule);
  padding-left: 0.9rem;
}
.pub-bibtex pre {
  margin: 0;
  font-family: var(--mono);
  font-size: 0.78rem;
  line-height: 1.5;
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 0.75rem;
  overflow-x: auto;
}

@media (max-width: 640px) {
  .pub { grid-template-columns: 1fr; }
  .pub-preview img { max-width: 320px; }
}

.lang-ja .pub-title, .lang-ja .pub-authors { font-family: "Hiragino Sans", "Noto Sans JP", var(--font); }

/* ---------- CV ---------- */

.cv-entry {
  display: grid;
  grid-template-columns: 10.5rem 1fr;
  gap: 1rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule);
}
.cv-entry:last-child { border-bottom: 0; }
.cv-date { color: var(--muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.cv-what strong { font-weight: 600; }
.cv-what .sub { color: var(--muted); font-size: 0.95rem; }

@media (max-width: 640px) {
  .cv-entry { grid-template-columns: 1fr; gap: 0.1rem; }
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 2rem;
  padding: 1.75rem 1.25rem 2.25rem;
  text-align: center;
  color: var(--muted);
  font-size: 0.85rem;
}
.social {
  display: flex;
  justify-content: center;
  gap: 1.25rem;
  margin-bottom: 0.9rem;
}
.social a { color: var(--ink); display: inline-flex; }
.social a:hover { color: var(--accent); }
.social svg { width: 26px; height: 26px; }

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

.pub-body { min-width: 0; }
@media (max-width: 640px) { .pub-preview:empty { display: none; } }
.lang-ja .pub-meta, .lang-ja .pub-authors .me { font-style: normal; }
@media (max-width: 640px) { .news th { width: 5.5rem; } }

.page-title .former { font-weight: 300; font-size: 0.5em; color: var(--muted); white-space: nowrap; }

/* Placeholder tile for papers without a figure */
.pub-preview.placeholder {
  aspect-ratio: 16 / 9;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.1rem;
  background: color-mix(in srgb, var(--tag-bg) 55%, transparent);
  border: 1px solid color-mix(in srgb, var(--rule) 70%, transparent);
  border-radius: 3px;
  color: color-mix(in srgb, var(--muted) 85%, transparent);
  text-align: center;
  padding: 0.5rem;
}
.placeholder .ph-venue { font-size: 1rem; font-weight: 500; line-height: 1.2; }
.placeholder .ph-year { font-size: 0.8rem; opacity: 0.8; }
@media (max-width: 640px) { .pub-preview.placeholder { display: none; } }