/* ---------- tokens ---------- */
:root {
  --ground: #FBFBFE;
  --panel: #F3F5FB;
  --ink: #1B2433;
  --muted: #5B6475;
  --line: #E2E3F1;
  --azure: #24598A;      /* struttura, link */
  --lilac: #7A5BA6;      /* accento, firma */
  --azure-soft: #8DB8E0; /* ramo studio */
  --on-azure: #FFFFFF;
  --sans: 'Figtree', 'Helvetica Neue', Helvetica, 'Segoe UI', sans-serif;
  --mono: var(--sans);
  --code: ui-monospace, Menlo, Consolas, monospace;
  --measure: 66ch;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --ground: #12161F;
    --panel: #1A2030;
    --ink: #E8EBF2;
    --muted: #A3ABBB;
    --line: #2A3144;
    --azure: #8DB8E0;
    --lilac: #C3B0E3;
    --azure-soft: #4F7FAE;
    --on-azure: #12161F;
    color-scheme: dark;
  }
}

/* ---------- base ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--azure); text-underline-offset: 3px; text-decoration-thickness: 1px; }
a:hover { color: var(--lilac); }
:focus-visible { outline: 2px solid var(--lilac); outline-offset: 3px; border-radius: 3px; }
h1, h2, h3, h4 { line-height: 1.2; margin: 0; font-weight: 600; text-wrap: balance; }
p { margin: 0; text-wrap: pretty; }
ul, ol { margin: 0; padding: 0; list-style: none; }

/* language switching */
html[data-lang="it"] [data-l="en"],
html[data-lang="en"] [data-l="it"] { display: none !important; }

.wrap { width: min(100% - 2.5rem, 1040px); margin-inline: auto; }
.section { padding-block: clamp(3rem, 7vw, 5.5rem); border-top: 1px solid var(--line); }
.section h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); color: var(--azure); margin-bottom: 1.75rem; letter-spacing: -0.01em; }
.prose, .prose p { max-width: var(--measure); }
.prose p + p { margin-top: 1rem; }

.skip { position: absolute; left: -999px; top: 0; background: var(--azure); color: var(--on-azure); padding: .5rem 1rem; z-index: 20; }
.skip:focus { left: 1rem; top: 1rem; }

/* ---------- nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 10;
  background: color-mix(in srgb, var(--ground) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  width: min(100% - 2.5rem, 1040px); margin-inline: auto;
  display: flex; align-items: center; gap: 1.5rem; min-height: 60px; flex-wrap: wrap;
}
.nav-name { font-weight: 600; color: var(--ink); text-decoration: none; margin-right: auto; }
.nav nav { display: flex; gap: 1.25rem; flex-wrap: wrap; }
.nav nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.nav nav a:hover { color: var(--azure); }
.lang { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 2px; }
.lang button {
  font: 500 .8rem/1 var(--mono); color: var(--muted);
  background: none; border: 0; border-radius: 999px; padding: .45rem .7rem; cursor: pointer; min-height: 32px;
}
.lang button[aria-pressed="true"] { background: var(--azure); color: var(--on-azure); }
@media (max-width: 700px) {
  html { scroll-padding-top: 96px; }
  .nav-inner {
    display: grid;
    grid-template-areas: "name lang" "links links";
    grid-template-columns: minmax(0, 1fr) auto;
    gap: .25rem 1rem;
    padding-block: .4rem;
  }
  .nav-name { grid-area: name; }
  .nav nav {
    grid-area: links;
    width: 100%;
    justify-content: space-between;
    gap: .25rem .75rem;
  }
  .nav nav a { display: inline-flex; align-items: center; min-height: 40px; }
  .lang { grid-area: lang; justify-self: end; }
}

/* ---------- hero ---------- */
.hero {
  display: grid; grid-template-columns: auto 1fr; gap: clamp(1.5rem, 4vw, 3rem);
  align-items: center; padding-block: clamp(3.5rem, 9vw, 7rem);
}
.hero-photo {
  width: clamp(120px, 18vw, 168px); height: auto; aspect-ratio: 1; object-fit: cover; border-radius: 50%;
  border: 5px solid var(--ground); box-shadow: 0 0 0 2px var(--lilac);
}
.hero h1 { font-size: clamp(2.4rem, 6vw, 4rem); letter-spacing: -0.03em; color: var(--ink); }
.hero-role { margin-top: .5rem; font-size: clamp(1.1rem, 2vw, 1.3rem); color: var(--azure); font-weight: 500; }
.hero-lead { margin-top: 1.25rem; max-width: 60ch; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .6rem; margin-top: 1.75rem; }
.btn {
  display: inline-flex; align-items: center; min-height: 44px; padding: 0 1.1rem;
  border: 1px solid var(--line); border-radius: 999px; text-decoration: none; color: var(--ink); font-weight: 500;
}
.btn:hover { border-color: var(--lilac); color: var(--lilac); }
.btn-primary { background: var(--azure); border-color: var(--azure); color: var(--on-azure); }
.btn-primary:hover { background: var(--lilac); border-color: var(--lilac); color: var(--on-azure); }
@media (max-width: 640px) { .hero { grid-template-columns: 1fr; } }

/* one orchestrated moment: the hero settles in on load */
@media (prefers-reduced-motion: no-preference) {
  .hero-photo, .hero-text { animation: settle .7s cubic-bezier(.2,.7,.2,1) both; }
  .hero-text { animation-delay: .08s; }
  @keyframes settle { from { opacity: 0; transform: translateY(10px); } }
}

/* ---------- path as a commit graph ---------- */
.graph-legend { display: flex; gap: 1.25rem; flex-wrap: wrap; margin: -0.75rem 0 1.5rem; font: .85rem var(--mono); color: var(--muted); }
.key::before { content: ""; display: inline-block; width: 18px; height: 3px; border-radius: 2px; margin-right: .45rem; vertical-align: middle; background: var(--c); }
.key-w, .lane.w { --c: var(--azure); }
.key-d, .lane.d { --c: var(--lilac); }
.key-s, .lane.s { --c: var(--azure-soft); }

.graph { --node-top: 1.95rem; }
.row { display: grid; grid-template-columns: 84px 1fr; gap: 1.25rem; }
.lanes { display: grid; grid-template-columns: repeat(3, 1fr); }
.lane { position: relative; }
.lane.up::before, .lane.down::after {
  content: ""; position: absolute; left: 50%; width: 3px; margin-left: -1.5px; background: var(--c);
}
.lane.up::before { top: 0; height: var(--node-top); }
.lane.down::after { top: var(--node-top); bottom: 0; }
.lane.node { background:
  radial-gradient(circle at 50% var(--node-top), var(--ground) 0 5px, var(--c) 5px 9px, transparent 9.5px) no-repeat; z-index: 1; }
.lane.node.up::before { height: calc(var(--node-top) - 9px); }
.lane.node.down::after { top: calc(var(--node-top) + 9px); }
.entry { padding: 1.25rem 0 1.5rem; border-bottom: 1px solid var(--line); max-width: var(--measure); }
.row:last-child .entry { border-bottom: 0; }
.when { font: .82rem var(--mono); color: var(--muted); }
.entry h3 { font-size: 1.15rem; margin-top: .3rem; }
.org { color: var(--azure); font-weight: 500; margin-top: .15rem; }
.entry p:not(.when):not(.org) { margin-top: .5rem; color: var(--muted); }
@media (max-width: 560px) { .row { grid-template-columns: 60px 1fr; gap: .9rem; } }

/* ---------- projects ---------- */
.group-title { font-size: 1rem; color: var(--lilac); font-weight: 600; margin: 2rem 0 .5rem; }
.group-title:first-of-type { margin-top: 0; }
.projects { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr)); column-gap: 3rem; }
.projects li { padding: 1.25rem 0; border-bottom: 1px solid var(--line); }
.projects h4 { font-size: 1.1rem; }
.projects p { margin-top: .4rem; color: var(--muted); }
.projects .tags { font: .82rem var(--mono); color: var(--azure); }

/* ---------- skills ---------- */
.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 1.5rem 3rem; margin: 0; }
.skills dt { font-weight: 600; color: var(--ink); }
.skills dd { margin: .25rem 0 0; color: var(--muted); }

/* ---------- blog ---------- */
.page-title { font-size: clamp(2rem, 5vw, 3rem); color: var(--azure); letter-spacing: -0.02em; }
.lead { margin-top: .75rem; color: var(--muted); max-width: var(--measure); }
.posts { margin-top: 1rem; }
.section .posts { margin-top: 0; }
.posts li { padding: 1rem 0; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 7.5rem 1fr; column-gap: 1rem; }
.posts time { font: .85rem/1.9 var(--mono); color: var(--muted); }
.posts a { font-weight: 600; font-size: 1.1rem; }
.posts p { grid-column: 2; color: var(--muted); margin-top: .2rem; }
@media (max-width: 560px) { .posts li { grid-template-columns: 1fr; } .posts p { grid-column: 1; } }

.post { padding-block: clamp(2.5rem, 7vw, 5rem); max-width: 72ch; }
.back { font-size: .95rem; }
.post h1 { font-size: clamp(2rem, 5vw, 2.8rem); letter-spacing: -0.02em; margin-top: 1.25rem; }
.post-meta { margin-top: .75rem; font: .85rem var(--mono); color: var(--muted); }
.post-body { margin-top: 2rem; }
.post-body > * + * { margin-top: 1.1rem; }
.post-body h2 { font-size: 1.5rem; color: var(--azure); margin-top: 2.5rem; }
.post-body code { font: .9em var(--code); background: var(--panel); padding: .1em .35em; border-radius: 4px; }
.post-body pre { background: var(--panel); padding: 1rem 1.25rem; border-radius: 8px; overflow-x: auto; }
.post-body pre code { background: none; padding: 0; }
.post-body ul { list-style: disc; padding-left: 1.25rem; }
.post-body ul li::marker { color: var(--lilac); }

/* ---------- contact & footer ---------- */
.contact-list { margin-top: 1.25rem; display: flex; flex-direction: column; gap: .4rem; font-size: 1.1rem; }
.footer { border-top: 1px solid var(--line); padding-block: 2rem; color: var(--muted); font-size: .9rem; }
.footer .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }