/* ==========================================================================
   enricobergamini.it — hand-made stylesheet
   Dark by default; light via [data-theme="light"] (toggle in the top bar).
   ========================================================================== */

:root {
  color-scheme: dark;
  --bg: #0f1012;
  --bg-2: #16181b;
  --line: #2a2d32;
  --text: #e6e5e0;
  --text-2: #c4c3bd;
  --muted: #8f949b;
  --accent: #7bd88f;
  --amber: #e3b55c;
  --blue: #7fb4e6;
  --fig-bg: #ffffff;
  /* background network motifs */
  --net-line: #30363d;
  --net-node: #4b535d;
  --net-c0: #3e7a4f;
  --net-c1: #3d6487;
  --net-c2: #7a6438;
  --maxw: clamp(58rem, 70vw, 68rem); /* text column: 58rem on small laptops, grows with the window, 68rem from ~1550 px */
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f6f5f1;
  --bg-2: #ffffff;
  --line: #dddbd3;
  --text: #1c1d1f;
  --text-2: #3b3d41;
  --muted: #62666c;
  --accent: #1d7a42;
  --amber: #9a6200;
  --blue: #1f5f9e;
  --net-line: #d9d6cc;
  --net-node: #bdb8ab;
  --net-c0: #93c7a5;
  --net-c1: #a3bfdc;
  --net-c2: #dcc391;
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }

body {
  margin: 0;
  position: relative;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 15px;
  line-height: 1.65;
  font-variant-ligatures: none;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  text-decoration-color: color-mix(in srgb, var(--accent) 40%, transparent);
}
a:hover { text-decoration-color: currentColor; }
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
::selection { background: var(--accent); color: var(--bg); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 1.25rem; }
main, .site-footer { position: relative; z-index: 1; }

.skip { position: absolute; left: -999px; top: .5rem; z-index: 20; background: var(--accent); color: var(--bg); padding: .3rem .6rem; }
.skip:focus { left: .5rem; }

/* ---------- top bar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 10;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--line);
}
.topbar__inner {
  max-width: var(--maxw); margin: 0 auto; padding: .65rem 1.25rem;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
  font-size: .85rem;
}
.brand { color: var(--muted); text-decoration: none; }
.brand:hover { color: var(--text); }
.topbar nav { display: flex; align-items: center; gap: 1.1rem; }
.topbar nav a { color: var(--text-2); text-decoration: none; }
.topbar nav a:hover { color: var(--accent); }
.theme-toggle {
  font: inherit; line-height: 1; color: var(--text-2); cursor: pointer;
  background: none; border: 1px solid var(--line); border-radius: 4px; padding: .3rem .4rem;
  display: inline-flex; align-items: center;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--accent); }

/* ---------- intro ---------- */
.intro { display: flex; flex-direction: row-reverse; justify-content: space-between; align-items: center; gap: 1.5rem; padding-top: 3.5rem; }
.intro__photo {
  flex: none; width: 200px; height: 250px; object-fit: cover;
  border-radius: 6px; border: 1px solid var(--line);
}
.prompt { margin: 0 0 .15rem; color: var(--muted); font-size: .85rem; }
.prompt::after { content: "▍"; color: var(--accent); margin-left: .2rem; }
h1 { margin: 0; font-size: 2rem; line-height: 1.15; font-weight: 700; letter-spacing: -.01em; }
.role { margin: .4rem 0 0; color: var(--text-2); font-size: .92rem; }

.bio { margin-top: 1.75rem; color: var(--text-2); }
.bio p { margin: 0 0 .9rem; }
.bio .prompt { margin: 0 0 .55rem; }

.links { list-style: none; padding: 0; margin: 1.1rem 0 0; display: flex; flex-wrap: wrap; gap: .35rem 1.1rem; font-size: .9rem; }

/* [bracketed] link style used in the links row and paper links */
.links a, .paper__links a { text-decoration: none; }
.links a::before, .paper__links a::before { content: "["; color: var(--muted); }
.links a::after, .paper__links a::after { content: "]"; color: var(--muted); }
.links a:hover, .paper__links a:hover { background: var(--accent); color: var(--bg); }
.links a:hover::before, .links a:hover::after,
.paper__links a:hover::before, .paper__links a:hover::after { color: var(--bg); }

/* ---------- section headings ---------- */
section[id] { scroll-margin-top: 4rem; }
/* section title: plain word over a hairline, with a short accent segment */
h2 {
  position: relative;
  margin: 4rem 0 1rem; padding-bottom: .55rem;
  font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em;
  border-bottom: 1px solid var(--line);
}
h2::after {
  content: ""; position: absolute; left: 0; bottom: -1px;
  width: 2.25rem; height: 2px; background: var(--accent);
}
/* sub-section label: small caps-style, muted */
h3 {
  margin: 2.4rem 0 .3rem;
  font-size: .72rem; font-weight: 500; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted);
}

/* ---------- paper cards ---------- */
.paper {
  display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 1.75rem;
  padding: 1.4rem 0; border-top: 1px dashed var(--line);
}
h3 + .paper { border-top: 0; }
.paper__fig {
  display: block; align-self: start; aspect-ratio: 4 / 3; overflow: hidden;
  background: var(--fig-bg); border: 1px solid var(--line); border-radius: 4px; padding: 6px;
}
.paper__fig img { display: block; width: 100%; height: 100%; object-fit: contain; }
.paper__fig:hover { border-color: var(--accent); }

.paper__meta { display: flex; flex-wrap: wrap; gap: .4rem; margin-bottom: .5rem; }
.badge {
  font-size: .7rem; line-height: 1.55; white-space: nowrap;
  padding: 0 .45rem; border: 1px solid currentColor; border-radius: 3px; color: var(--muted);
}
.badge--pub { color: var(--accent); }
.badge--review { color: var(--amber); }
.badge--wp { color: var(--blue); }
.badge--flag { color: var(--bg); background: var(--accent); border-color: var(--accent); }

.paper__title { margin: 0; font-size: 1rem; line-height: 1.45; font-weight: 700; color: var(--text); }
.paper__authors { margin: .3rem 0 0; font-size: .86rem; color: var(--text-2); }
.paper__venue { margin: .1rem 0 0; font-size: .86rem; color: var(--muted); font-style: italic; }
.paper__links { list-style: none; padding: 0; margin: .6rem 0 0; display: flex; flex-wrap: wrap; gap: .25rem 1rem; font-size: .85rem; }

.abstract { margin-top: .55rem; }
.abstract summary {
  display: inline-block; list-style: none; cursor: pointer;
  font-size: .85rem; color: var(--text-2);
}
.abstract summary::-webkit-details-marker { display: none; }
.abstract summary::before { content: "+ "; color: var(--accent); }
.abstract[open] summary::before { content: "− "; }
.abstract summary:hover { color: var(--accent); }
.abstract p { margin: .6rem 0 0; max-width: 80ch; font-size: .88rem; line-height: 1.7; color: var(--text-2); }
.todo { color: var(--amber) !important; }

/* ---------- work in progress (each item opens to show an abstract) ---------- */
.wip { list-style: none; padding: 0; margin: .4rem 0 0; }
.wip li { padding: .75rem 0; border-top: 1px dashed var(--line); }
.wip li:first-child { border-top: 0; }
.wip summary {
  display: grid; grid-template-columns: 1.3rem minmax(0, 1fr);
  list-style: none; cursor: pointer;
}
.wip summary::-webkit-details-marker { display: none; }
.wip summary::before {
  content: "›"; color: var(--accent); grid-row: span 2; align-self: start;
  width: 1ch; height: 1.5em; font-size: .92rem; line-height: 1.5; text-align: center;
  transform-origin: 50% 50%;
}
.wip details[open] > summary::before { transform: rotate(90deg); }
.wip .t { color: var(--text); font-weight: 500; font-size: .92rem; line-height: 1.5; }
.wip .a { color: var(--muted); font-size: .84rem; }
.wip summary:hover .t { color: var(--accent); }
.wip details p { margin: .55rem 0 .1rem 1.3rem; max-width: 80ch; font-size: .88rem; line-height: 1.7; color: var(--text-2); }

/* ---------- policy / talks / teaching lists ---------- */
.now {
  margin: 0 0 1.25rem; padding: .8rem 1rem;
  background: var(--bg-2); border: 1px solid var(--line); border-radius: 4px;
  font-size: .9rem; color: var(--text-2);
}
.tag { margin-right: .7rem; padding: .05rem .45rem; border-radius: 3px; font-size: .75rem; color: var(--bg); background: var(--amber); }
.lede { margin: 0 0 .5rem; color: var(--text-2); font-size: .92rem; }
.more { margin: 1rem 0 0; font-size: .88rem; color: var(--muted); }

.entries { list-style: none; padding: 0; margin: .25rem 0 0; }
.entries li {
  display: grid; grid-template-columns: 4.6rem minmax(0, 1fr); gap: .75rem;
  padding: .45rem 0; font-size: .9rem; line-height: 1.55;
}
.entries .yr { color: var(--muted); }
.entries .meta { color: var(--muted); }

/* ---------- footer ---------- */
.site-footer { max-width: var(--maxw); margin: 5rem auto 0; padding: 0 1.25rem 3rem; font-size: .76rem; color: var(--muted); }
.site-footer__inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; gap: .4rem 1.5rem;
  padding-top: 1.5rem; border-top: 1px solid var(--line);
}
.site-footer a { color: var(--muted); }

/* ---------- static network drawings (built by site.js) ---------- */
.bg-net { position: absolute; inset: 0; z-index: 0; overflow: hidden; pointer-events: none; }
.bg-net svg { position: absolute; overflow: visible; }
.bg-net .e { fill: none; stroke: var(--net-line); stroke-width: 1; vector-effect: non-scaling-stroke; }
.bg-net .e.soft { stroke-opacity: .7; }
.bg-net .c0 { --c: var(--net-c0); }
.bg-net .c1 { --c: var(--net-c1); }
.bg-net .c2 { --c: var(--net-c2); }
.bg-net .e.c0, .bg-net .e.c1, .bg-net .e.c2 { stroke: var(--c); stroke-opacity: .8; }
.bg-net .n { fill: var(--c, var(--net-node)); stroke: var(--bg); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.bg-net .n.o { fill: var(--bg); stroke: var(--net-node); stroke-width: 1.2; }
.bg-net .halo { fill: none; stroke: var(--c); stroke-width: 1; stroke-dasharray: 2 2; vector-effect: non-scaling-stroke; }
.bg-net .ring { fill: none; stroke: var(--net-line); stroke-width: 1; stroke-dasharray: 1 3; vector-effect: non-scaling-stroke; }
.bg-net .frame { fill: none; stroke: var(--net-line); stroke-width: 1; vector-effect: non-scaling-stroke; }
.bg-net .cell { fill: var(--c, var(--net-node)); fill-opacity: .9; }
.bg-net .block { fill: none; stroke: var(--c); stroke-width: 1; vector-effect: non-scaling-stroke; }
.bg-net .lbl { fill: var(--net-node); font-family: "JetBrains Mono", ui-monospace, monospace; letter-spacing: .02em; }
@media (max-width: 1200px) { .bg-net { display: none; } }

/* ---------- small screens ---------- */
@media (max-width: 640px) {
  body { font-size: 14px; }
  .wrap, .topbar__inner, .site-footer { padding-left: 1rem; padding-right: 1rem; }
  .brand { display: none; }
  .topbar__inner { justify-content: center; }
  .topbar nav { gap: .9rem; }
  .intro { padding-top: 2rem; gap: 1rem; flex-direction: column; align-items: flex-start; }
  .intro__photo { width: 120px; height: 120px; }
  h1 { font-size: 1.55rem; }
  .paper { grid-template-columns: 1fr; gap: .9rem; }
  .paper__fig { aspect-ratio: 16 / 10; }
  .entries li { grid-template-columns: 3.9rem minmax(0, 1fr); gap: .5rem; }
}

/* ---------- 404 page ---------- */
.notfound { padding-top: 5rem; min-height: 60vh; }
.notfound .prompt { overflow-wrap: anywhere; }
.notfound__err { margin: 0 0 1.75rem; color: var(--muted); font-size: .85rem; }
.notfound__text { margin: 1rem 0 0; max-width: 70ch; color: var(--text-2); }