/* Francesca Palermo: portfolio site. Tokens first, then base, layout, components. */
:root {
  --bg: #f7f7fb;
  --fg: #14152a;
  --mut: #5b5e7a;
  --line: #e2e3ef;
  --acc: #4f46e5;
  --accink: #ffffff;
  --card: #ffffff;
  --tint: #ebeafd;
  --shadow: rgba(40, 40, 120, .35);
  --head: "Bricolage Grotesque", system-ui, sans-serif;
  --body: "DM Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Consolas, monospace;
  --gutter: max(20px, env(safe-area-inset-left, 0px));
  --maxw: 1080px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0b0e1c; --fg: #e9eaf6; --mut: #9a9dbd; --line: #252a45;
    --acc: #8b93ff; --accink: #0b0e1c; --card: #131730; --tint: #1b2050; --shadow: rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0b0e1c; --fg: #e9eaf6; --mut: #9a9dbd; --line: #252a45;
  --acc: #8b93ff; --accink: #0b0e1c; --card: #131730; --tint: #1b2050; --shadow: rgba(0, 0, 0, .6);
  color-scheme: dark;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--fg);
  font: 400 16.5px/1.65 var(--body);
  display: flex; flex-direction: column; min-height: 100vh;
}
main { flex: 1; }
img { max-width: 100%; height: auto; }
a { color: var(--acc); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 2px solid var(--acc); outline-offset: 3px; border-radius: 4px; }
.skip { position: absolute; left: -999px; top: 8px; background: var(--acc); color: var(--accink); padding: 8px 14px; border-radius: 8px; z-index: 20; }
.skip:focus { left: 8px; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding-inline: var(--gutter); }
h1, h2, h3 { font-family: var(--head); line-height: 1.15; letter-spacing: -.015em; text-wrap: balance; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 10; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
.header-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 28px; padding-block: 14px; }
.brand { font: 700 19px var(--head); color: var(--fg); text-decoration: none; letter-spacing: -.01em; margin-right: auto; }
.nav { display: flex; flex-wrap: wrap; gap: 4px 22px; }
.nav a { color: var(--mut); text-decoration: none; font-size: 15.5px; padding-block: 4px; border-bottom: 2px solid transparent; }
.nav a:hover { color: var(--fg); }
.nav a[aria-current="page"] { color: var(--fg); border-bottom-color: var(--acc); }
.theme-toggle { display: grid; place-items: center; width: 36px; height: 36px; border: 1px solid var(--line); background: var(--card); color: var(--fg); border-radius: 10px; cursor: pointer; }
.theme-toggle:hover { border-color: var(--acc); }
.icon-sun { display: none; }
:root[data-theme="dark"] .icon-sun { display: block; }
:root[data-theme="dark"] .icon-moon { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: block; }
  :root:not([data-theme="light"]) .icon-moon { display: none; }
}

/* Footer */
.site-footer { border-top: 1px solid var(--line); margin-top: 72px; color: var(--mut); font-size: 14.5px; }
.footer-row { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 10px 24px; padding-block: 26px; }
.footer-row p { margin: 0; }
.link-list { display: flex; flex-wrap: wrap; gap: 6px 20px; list-style: none; margin: 0; padding: 0; }
.link-list a { color: var(--mut); text-decoration: none; }
.link-list a:hover { color: var(--acc); }

/* Buttons and tags */
.btn { display: inline-block; font: 600 15px var(--body); background: var(--acc); color: var(--accink); padding: 11px 20px; border-radius: 10px; text-decoration: none; }
.btn:hover { filter: brightness(1.08); text-decoration: none; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }
.btn.ghost:hover { border-color: var(--acc); color: var(--acc); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; list-style: none; margin: 0; padding: 0; }
.tags li { border: 1px solid var(--line); background: var(--card); border-radius: 99px; padding: 5px 14px; font-size: 14.5px; }

/* Home */
.hero { display: grid; grid-template-columns: 1fr 290px; gap: 56px; align-items: center; padding-block: 56px 60px; }
.kick { display: inline-block; font: 500 12.5px var(--mono); letter-spacing: .04em; background: var(--tint); color: var(--acc); padding: 5px 12px; border-radius: 99px; }
.hero h1 { margin: 16px 0 16px; font-size: clamp(36px, 5.4vw, 60px); line-height: 1.02; letter-spacing: -.025em; }
.hero p { margin: 0 0 26px; max-width: 54ch; color: var(--mut); font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px 22px; align-items: center; }
.hero-actions .link-list a { font-size: 15.5px; }
.portrait { width: 100%; aspect-ratio: 4 / 5; object-fit: cover; object-position: center 20%; border-radius: 22px; box-shadow: 0 22px 44px -22px var(--shadow); }
.strip { border-block: 1px solid var(--line); }
.strip-row { display: flex; flex-wrap: wrap; gap: 8px 32px; padding-block: 18px; color: var(--mut); font-size: 14.5px; }
.strip b { color: var(--fg); font-weight: 600; margin-right: 6px; }
.section { padding-top: 56px; }
.section h2 { margin: 0 0 20px; font-size: 28px; }
.section-head { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: baseline; gap: 6px 20px; margin-bottom: 20px; }
.section-head h2 { margin: 0; }
.section-head a { font-size: 15px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.card { display: grid; grid-template-rows: auto 1fr; background: var(--card); border: 1px solid var(--line); border-radius: 14px; overflow: hidden; color: inherit; text-decoration: none; }
.card:hover { border-color: var(--acc); }
.card .img { background: var(--tint) center / cover no-repeat; aspect-ratio: 16 / 10; }
.card .img.plain { background: linear-gradient(135deg, var(--tint), var(--card)); display: grid; place-items: center; font: 500 13px var(--mono); color: var(--acc); letter-spacing: .06em; text-transform: uppercase; }
.card .txt { padding: 16px 18px 20px; display: grid; gap: 6px; align-content: start; }
.card small { font: 500 12px var(--mono); color: var(--acc); text-transform: uppercase; letter-spacing: .05em; }
.card h3 { margin: 0; font-size: 18px; }
.card p { margin: 0; color: var(--mut); font-size: 15px; }

/* Publications list */
.pubs { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.pubs li { display: grid; grid-template-columns: 64px 1fr; gap: 16px; padding: 14px 0; border-bottom: 1px solid var(--line); }
.pubs time { font: 500 13px var(--mono); color: var(--acc); font-variant-numeric: tabular-nums; padding-top: 4px; }
.pubs .t { font-weight: 600; line-height: 1.4; }
.pubs .t a { color: var(--fg); }
.pubs .t a:hover { color: var(--acc); }
.pubs .v { display: block; color: var(--mut); font-size: 14.5px; margin-top: 2px; }
.pill { display: inline-block; font: 500 11px var(--mono); letter-spacing: .05em; text-transform: uppercase; color: var(--acc); border: 1px solid var(--line); border-radius: 99px; padding: 1px 8px; margin-left: 8px; vertical-align: 2px; }
.year-h { font: 500 13px var(--mono); color: var(--mut); margin: 34px 0 8px; letter-spacing: .08em; }

/* Inner pages */
.page { max-width: 780px; margin: 0 auto; padding: 52px var(--gutter) 0; }
.page-head h1 { margin: 0 0 12px; font-size: clamp(32px, 4.5vw, 46px); letter-spacing: -.025em; }
.lead { margin: 0 0 8px; color: var(--mut); font-size: 18px; max-width: 60ch; }
.page.wide { max-width: var(--maxw); }
.prose { margin-top: 28px; }
.prose > :first-child { margin-top: 0; }
.prose h2 { font-size: 26px; margin: 56px 0 14px; padding-top: 28px; border-top: 1px solid var(--line); scroll-margin-top: 80px; }
.prose h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
.prose h3 { font-size: 20px; margin: 30px 0 8px; }
.prose p, .prose li { max-width: 68ch; }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 36px 0; }
.prose img { border-radius: 12px; border: 1px solid var(--line); display: block; margin: 18px auto; }
.prose pre, .prose code { font-family: var(--mono); font-size: .9em; }
.prose code { background: var(--tint); padding: 1px 6px; border-radius: 5px; }
.prose pre { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px; }
.prose table { border-collapse: collapse; display: block; overflow-x: auto; max-width: 100%; }
.prose th, .prose td { border-bottom: 1px solid var(--line); padding: 8px 14px 8px 0; text-align: left; vertical-align: top; }
.video { position: relative; aspect-ratio: 16 / 9; max-width: 560px; margin: 18px auto; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); }
.video iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 8px; padding: 0; list-style: none; }
.chips a { display: inline-block; border: 1px solid var(--line); background: var(--card); color: var(--fg); border-radius: 99px; padding: 5px 14px; font-size: 14.5px; text-decoration: none; }
.chips a:hover { border-color: var(--acc); color: var(--acc); }

/* CV */
.cv-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 18px; }
.cv-block { margin-top: 8px; }
.job { display: grid; gap: 4px; margin: 0 0 30px; }
.job-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 2px 20px; align-items: baseline; }
.job-top h3 { margin: 0; font-size: 19px; }
.job-top time { font: 500 13px var(--mono); color: var(--acc); white-space: nowrap; }
.job .org { margin: 0; color: var(--mut); }
.job ul { margin: 10px 0 0; padding-left: 20px; }
.job li { margin-bottom: 6px; }
.skills { display: grid; grid-template-columns: 160px 1fr; gap: 10px 24px; margin: 0; }
.skills dt { font-weight: 600; }
.skills dd { margin: 0; color: var(--mut); }
.awards { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.awards li { display: flex; justify-content: space-between; gap: 16px; padding: 10px 0; border-bottom: 1px solid var(--line); max-width: none; }
.awards time { font: 500 13px var(--mono); color: var(--acc); white-space: nowrap; }

/* Dataset cards */
.dataset-list { display: grid; gap: 18px; margin-top: 8px; }
.dataset-item { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 20px 22px; }
.dataset-item h2 { margin: 0 0 8px; padding: 0; border: 0; font-size: 21px; }
.dataset-item p { margin: 0 0 12px; color: var(--mut); }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 28px; padding-block: 28px 40px; }
  .portrait { max-width: 240px; order: -1; }
  .cards { grid-template-columns: 1fr; }
  .skills { grid-template-columns: 1fr; gap: 2px; }
  .skills dd { margin-bottom: 12px; }
  .pubs li { grid-template-columns: 1fr; gap: 0; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }