/* christiandorion.net — one stylesheet, light and dark. Colours are defined once as tokens below. */

:root {
  --bg: #fbfaf7;
  --bg-alt: #f3f1ec;
  --surface: #ffffff;
  --text: #1c1f24;
  --muted: #5c6370;
  --line: #e2ded5;
  --accent: #0b3a6f;        /* HEC navy, slightly lifted */
  --accent-soft: #e6edf5;
  --dv: #0f766e;            /* Delta Vega band accent */
  --dv-soft: #e3f1ef;
  --shadow: 0 1px 2px rgb(0 0 0 / .04), 0 8px 24px rgb(0 0 0 / .05);
  --serif: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --topbar-h: 3.75rem;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151a;
    --bg-alt: #171b21;
    --surface: #1c2128;
    --text: #e7e9ec;
    --muted: #9aa3ae;
    --line: #2a3038;
    --accent: #8fb8ea;
    --accent-soft: #1b2a3c;
    --dv: #5cc8bb;
    --dv-soft: #15302d;
    --shadow: none;
    color-scheme: dark;
  }
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--topbar-h) + 1rem);
  -webkit-text-size-adjust: 100%;
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 400 1rem/1.65 var(--sans);
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: underline; text-decoration-color: color-mix(in srgb, currentColor 35%, transparent); text-underline-offset: .18em; }
a:hover { text-decoration-color: currentColor; }

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

h1, h2, h3 { font-family: var(--serif); font-weight: 600; line-height: 1.2; letter-spacing: -.01em; }
h2 { font-size: clamp(1.6rem, 1.2rem + 1.2vw, 2.1rem); margin: 0 0 1.5rem; }
h3 { font-size: 1.15rem; margin: 2.25rem 0 .9rem; color: var(--muted); font-family: var(--sans); font-weight: 600; text-transform: uppercase; letter-spacing: .08em; font-size: .8rem; }

.wrap { max-width: 68rem; margin-inline: auto; padding-inline: clamp(1rem, 4vw, 2rem); }

.skip { position: absolute; left: -999px; }
.skip:focus { left: 1rem; top: 1rem; z-index: 10; background: var(--surface); padding: .5rem 1rem; }

/* ---- Top bar ---- */
.topbar {
  position: sticky; top: 0; z-index: 5;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(1.4) blur(10px);
  -webkit-backdrop-filter: saturate(1.4) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s;
}
.topbar.scrolled { border-bottom-color: var(--line); }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: var(--topbar-h); }
.brand { font-family: var(--serif); font-weight: 600; font-size: 1.1rem; color: var(--text); text-decoration: none; white-space: nowrap; opacity: 0; transition: opacity .2s; }
.topbar.scrolled .brand { opacity: 1; }
.topbar nav ul { display: flex; gap: .25rem; list-style: none; margin: 0; padding: 0; }
.topbar nav a {
  display: block; padding: .4rem .7rem; border-radius: 999px;
  color: var(--muted); text-decoration: none; font-size: .9rem; font-weight: 500; white-space: nowrap;
}
.topbar nav a:hover { color: var(--text); }
.topbar nav a.active { color: var(--accent); background: var(--accent-soft); }

@media (max-width: 760px) {
  .topbar-inner { flex-direction: column; align-items: stretch; gap: 0; padding-block: .4rem; }
  .brand { display: none; }
  .topbar nav { overflow-x: auto; scrollbar-width: none; margin-inline: -.5rem; }
  .topbar nav::-webkit-scrollbar { display: none; }
  .topbar nav ul { width: max-content; }
  :root { --topbar-h: 3rem; }
}

/* ---- Hero ---- */
.hero {
  display: grid; grid-template-columns: 13rem 1fr; gap: clamp(1.5rem, 4vw, 3.5rem);
  align-items: start; padding-block: clamp(2.5rem, 6vw, 5rem) clamp(2.5rem, 5vw, 4rem);
}
.portrait { width: 100%; aspect-ratio: 242 / 315; object-fit: cover; border-radius: 1rem; box-shadow: var(--shadow); }
.hero h1 { font-size: clamp(2.3rem, 1.6rem + 2.4vw, 3.4rem); margin: 0 0 .75rem; }
.roles { list-style: none; padding: 0; margin: 0 0 1.5rem; color: var(--muted); }
.roles li { padding-block: .1rem; }
.roles a { color: inherit; }
.bio { max-width: 40rem; }
.bio p { margin: 0 0 1rem; }

@media (max-width: 640px) {
  .hero { grid-template-columns: 1fr; }
  .portrait { width: 11rem; }  /* same uncropped rounded rectangle as on desktop, just smaller */
}

.actions { display: flex; flex-wrap: wrap; gap: .6rem; margin: 1.5rem 0 0; }
.btn {
  display: inline-flex; align-items: center; gap: .45rem;
  padding: .55rem 1rem; border-radius: 999px; border: 1px solid var(--line);
  background: var(--surface); color: var(--text); text-decoration: none; font-size: .9rem; font-weight: 500;
  transition: border-color .15s, transform .15s;
}
.btn:hover { border-color: var(--accent); transform: translateY(-1px); }
.btn svg { width: 1.1rem; height: 1.1rem; }
/* Logo icons from a transparent PNG used as a stencil, so they take the button's text colour like the SVG icons. */
.icon-mask {
  display: inline-block; width: 1.4rem; height: 1.4rem; margin-block: -.15rem; background-color: currentColor;
  -webkit-mask: var(--mask) center / contain no-repeat; mask: var(--mask) center / contain no-repeat;
}
/* Inlined copy of img/deltavega-mark.png: Chrome refuses masks loaded from file:// pages, but accepts data: URIs. */
.icon-dv { --mask: url("data:image/png;base64,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"); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: var(--bg); }
.btn-primary:hover { color: var(--bg); }

/* ---- Sections ---- */
.band { padding-block: clamp(3rem, 7vw, 5rem); border-top: 1px solid var(--line); }
.band:nth-of-type(even) { background: var(--bg-alt); }
.lede { color: var(--muted); max-width: 44rem; margin: -.25rem 0 1.25rem; font-style: italic; }
.lede a { color: inherit; }

/* Papers */
.papers { list-style: none; padding: 0; margin: 0; }
.paper { display: grid; grid-template-columns: 3.5rem 1fr; gap: 1rem; padding-block: 1rem; border-bottom: 1px solid var(--line); }
.paper:last-child { border-bottom: 0; }
.paper-year { color: var(--muted); font-variant-numeric: tabular-nums; font-size: .9rem; padding-top: .15rem; }
.paper p { margin: 0; }
.paper-title { font-family: var(--serif); font-size: 1.12rem; font-weight: 600; line-height: 1.35; }
.paper-title a { color: var(--text); text-decoration: none; }
.paper-title a:hover { color: var(--accent); }
.paper-meta { color: var(--muted); font-size: .93rem; margin-top: .2rem !important; }
.paper-extra { margin-top: .45rem !important; display: flex; flex-wrap: wrap; gap: .4rem; align-items: center; font-size: .85rem; }
.paper-note { color: var(--muted); }
.chip {
  font-size: .75rem; font-weight: 600; letter-spacing: .02em; text-decoration: none;
  padding: .12rem .55rem; border-radius: 999px; background: var(--accent-soft); color: var(--accent);
}
.chip:hover { background: var(--accent); color: var(--bg); }
.chip-journal { background: transparent; box-shadow: inset 0 0 0 1px var(--accent); letter-spacing: .04em; }
.status {
  display: inline-block; margin-left: .35rem; padding: .05rem .5rem; border-radius: 999px;
  font-size: .72rem; font-weight: 600; letter-spacing: .02em; vertical-align: .1em;
  color: var(--dv); border: 1px solid color-mix(in srgb, var(--dv) 45%, transparent);
}

/* Abstract toggle: the summary row ignores clicks except on its chips, so only "Abstract" opens it. */
.paper-abstract > summary { list-style: none; pointer-events: none; }
.paper-abstract > summary::-webkit-details-marker { display: none; }
.paper-abstract > summary > * { pointer-events: auto; }
.paper-abstract > summary:focus-visible .chip-toggle { outline: 2px solid var(--accent); outline-offset: 2px; }
.chip-toggle { cursor: pointer; user-select: none; }
.chip-toggle::after { content: "▸"; display: inline-block; margin-left: .3rem; transition: transform .15s; }
.paper-abstract[open] .chip-toggle { background: var(--accent); color: var(--bg); }
.paper-abstract[open] .chip-toggle::after { transform: rotate(90deg); }
.abstract {
  margin-top: .7rem; padding: .9rem 1.1rem; max-width: 46rem;
  background: var(--surface); border: 1px solid var(--line); border-left: 3px solid var(--accent); border-radius: .5rem;
  font-size: .93rem; line-height: 1.6;
}
.abstract p { margin: 0; }

/* Delta Vega band */
.band-dv { background: linear-gradient(180deg, var(--dv-soft), var(--bg) 85%) !important; }
.dv-grid { display: grid; grid-template-columns: 1.6fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.eyebrow { color: var(--dv); font-weight: 600; text-transform: uppercase; letter-spacing: .1em; font-size: .78rem; margin: 0 0 .5rem; }
.prose { max-width: 42rem; }
.prose p { margin: 0 0 1rem; }
.band-dv .btn-primary { background: var(--dv); border-color: var(--dv); }
.band-dv .btn:hover { border-color: var(--dv); }
.dv-scale { margin: 0; padding: 1.5rem; background: var(--surface); border: 1px solid var(--line); border-radius: 1rem; box-shadow: var(--shadow); }
.scale { display: grid; grid-template-columns: repeat(10, 1fr); gap: .3rem; }
.scale span {
  aspect-ratio: 1; display: grid; place-items: center; border-radius: .4rem;
  font-size: .8rem; font-weight: 600; color: var(--muted); background: var(--bg-alt); border: 1px solid var(--line);
}
.scale span.lit { background: var(--dv-soft); color: var(--dv); border-color: transparent; }
.scale span.on { background: var(--dv); color: var(--surface); border-color: var(--dv); transform: scale(1.15); }
.dv-scale figcaption { margin-top: 1rem; font-size: .88rem; color: var(--muted); }
@media (max-width: 760px) { .dv-grid { grid-template-columns: 1fr; } }

/* Events */
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 20rem), 1fr)); gap: 1rem; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 1rem; padding: 1.4rem 1.5rem; box-shadow: var(--shadow); }
.card h3 { margin: 0 0 .25rem; font-family: var(--serif); text-transform: none; letter-spacing: -.01em; font-size: 1.2rem; color: var(--text); }
.card h3 a { color: inherit; text-decoration: none; }
.card ul { padding-left: 1.1rem; margin: .6rem 0 0; font-size: .93rem; }
.events { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 22rem), 1fr)); gap: 0 2.5rem; }
.event { padding-block: .9rem; border-bottom: 1px solid var(--line); }
.event p { margin: 0; }
.event-title { font-weight: 600; }
.event-title a { color: var(--text); }
.event-when { color: var(--muted); font-size: .88rem; margin: 0; }
.event ul { margin: .35rem 0 0; padding-left: 1.1rem; font-size: .9rem; }

details.more { margin-top: 1.75rem; }
details.more > summary {
  cursor: pointer; list-style: none; display: inline-flex; align-items: center; gap: .5rem;
  font-weight: 500; color: var(--accent); padding: .45rem 1rem; border: 1px solid var(--line); border-radius: 999px; background: var(--surface);
}
details.more > summary::-webkit-details-marker { display: none; }
details.more > summary::before { content: "+"; font-weight: 600; }
details.more[open] > summary::before { content: "−"; }
details.more[open] > summary { margin-bottom: 1rem; }

/* Background */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 4rem); }
@media (max-width: 760px) { .two-col { grid-template-columns: 1fr; } .h3-offset { margin-top: 0; } }
@media (min-width: 761px) { .h3-offset { margin-top: calc(2.1rem * 1.2 + 1.5rem + 2.25rem); } }
.timeline { list-style: none; padding: 0; margin: 0; }
.timeline > li { display: grid; grid-template-columns: 7rem 1fr; gap: 1rem; padding-block: .7rem; border-bottom: 1px solid var(--line); }
.timeline > li:last-child { border-bottom: 0; }
.when { color: var(--muted); font-size: .88rem; font-variant-numeric: tabular-nums; padding-top: .1rem; }
.timeline p { margin: 0; }
.what { font-weight: 500; }
.ext { text-decoration: none; }
.note { color: var(--muted); font-size: .9rem; }
.subroles { list-style: none; padding: 0; margin: .35rem 0 0; font-size: .92rem; }
.subroles span { display: inline-block; min-width: 6rem; color: var(--muted); font-variant-numeric: tabular-nums; }
.plain { list-style: none; padding: 0; margin: 0; }
.plain li { padding-block: .25rem; }
.inline-list { color: var(--muted); line-height: 1.9; margin: 0; }

/* Talks */
.talks { padding-left: 1.2rem; margin: 0; }
.talks > li { margin-bottom: 1rem; }
.talks p { margin: 0; }
.talks ul { margin: .25rem 0 0; padding-left: 1.1rem; color: var(--muted); font-size: .9rem; }
.tag { font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); border: 1px solid var(--line); border-radius: .3rem; padding: .05rem .35rem; vertical-align: .1em; }
.aka { color: var(--muted); font-size: .9rem; }

/* News */
.news { list-style: none; padding: 0; margin: 0; }
.news > li { display: grid; grid-template-columns: 6rem 1fr; gap: 1rem; padding-block: .9rem; border-bottom: 1px solid var(--line); }
.news time { color: var(--muted); font-size: .88rem; font-variant-numeric: tabular-nums; padding-top: .15rem; }
.news p { margin: 0; }
.news-title { font-weight: 600; }
.news-body { color: var(--muted); font-size: .95rem; }

/* Footer */
.footer { background: var(--accent); color: #f3f5f8; padding-block: 3rem 1.5rem; }
@media (prefers-color-scheme: dark) { .footer { background: var(--surface); color: var(--text); border-top: 1px solid var(--line); } }
.footer h2 { color: inherit; margin-bottom: 1rem; }
.footer a { color: inherit; }
.footer address { font-style: normal; opacity: .85; margin-top: 1rem; }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: end; }
.footer-links { list-style: none; padding: 0; margin: 0; text-align: right; }
.footer-links li { padding-block: .15rem; }
.email-text { font-size: 1.1rem; font-weight: 500; }
.copyright { opacity: .7; font-size: .85rem; margin-top: 2.5rem; }
@media (max-width: 640px) { .footer-grid { grid-template-columns: 1fr; } .footer-links { text-align: left; } }