/* =========================================================
   Alberto Gennaro — personal site
   ========================================================= */

/* ---------- Tokens (light) ---------- */
:root{
  --bg:        #fdfdfb;
  --bg-soft:   #f5f6f9;
  --fg:        #0f172a;
  --fg-soft:   #1f2937;
  --muted:     #5b6472;
  --line:      #e6e8ee;
  --line-soft: #eef0f4;
  --chip:      #f3f5f8;
  --card:      #ffffff;

  --btn:       #0f172a;
  --btnfg:     #ffffff;

  --accent:    #2657ff;       /* cobalt */
  --accent-2:  #6ea3ff;
  --gold:      #c98a1a;       /* warm secondary */

  --shadow:     0 10px 30px rgba(15,23,42,.07);
  --shadow-lg:  0 30px 60px rgba(15,23,42,.10);
  --radius:    18px;
  --radius-sm: 12px;

  --max:       1080px;

  --font-sans:  "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Arial;
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --font-mono:  ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

/* ---------- Tokens (dark) ---------- */
html[data-theme="dark"]{
  --bg:        #0b1020;
  --bg-soft:   #111733;
  --fg:        #e7eaf3;
  --fg-soft:   #d4d8e3;
  --muted:     #9aa3b8;
  --line:      #1d2447;
  --line-soft: #161c3a;
  --chip:      #161c3a;
  --card:      #0f1530;

  --btn:       #e7eaf3;
  --btnfg:     #0b1020;

  --accent:    #7aa2ff;
  --accent-2:  #b9ccff;
  --gold:      #e2b264;

  --shadow:     0 10px 30px rgba(0,0,0,.5);
  --shadow-lg:  0 30px 60px rgba(0,0,0,.55);
}

/* ---------- Base ---------- */
*{box-sizing:border-box}
html,body{
  margin:0;padding:0;
  background:var(--bg);
  color:var(--fg);
  font-family:var(--font-sans);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
html{scroll-behavior:smooth}
body{
  background-image:
    radial-gradient(1200px 600px at 85% -10%, color-mix(in oklab, var(--accent) 14%, transparent), transparent 60%),
    radial-gradient(900px 500px at -10% 10%, color-mix(in oklab, var(--gold) 8%, transparent), transparent 60%);
  background-attachment:fixed;
}

a{color:inherit;text-decoration:none}
a:hover{text-decoration:underline;text-underline-offset:3px}

h1,h2,h3{font-family:var(--font-serif);font-weight:600;letter-spacing:-.01em}
h2{margin:0 0 14px;font-size:24px}
h3{margin:0 0 6px;font-size:17px}

.muted{color:var(--muted);margin:0}
.small{font-size:13px}
.small-caps{font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.mono{font-family:var(--font-mono)}
.big{font-size:16px}

ul.tight{margin:8px 0 0 18px;padding:0}
ul.tight li{margin:4px 0}

/* ---------- Container & nav ---------- */
.container{max-width:var(--max);margin:0 auto;padding:24px 20px 64px}

.nav{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding:10px 14px;margin-bottom:8px;
  background: color-mix(in oklab, var(--card) 80%, transparent);
  backdrop-filter: saturate(150%) blur(10px);
  -webkit-backdrop-filter: saturate(150%) blur(10px);
  border:1px solid var(--line);
  border-radius:999px;
  box-shadow: var(--shadow);
  position:sticky; top:14px; z-index:50;
}
.brand-wrap{display:flex;align-items:center;gap:10px}
.brand-wrap:hover{text-decoration:none}
.brand-mark{
  display:inline-grid;place-items:center;
  width:34px;height:34px;border-radius:10px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color:#fff;font-weight:800;font-size:13px;letter-spacing:.05em;
  box-shadow: 0 6px 18px color-mix(in oklab, var(--accent) 35%, transparent);
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand{font-weight:800;letter-spacing:.06em;font-size:13.5px}
.subtitle{color:var(--muted);font-size:11.5px;margin-top:2px}

.nav-right{display:flex;gap:10px;align-items:center}
.nav-right a{color:var(--muted);font-size:13.5px;padding:6px 8px;border-radius:8px;transition:color .15s, background .15s}
.nav-right a:hover{color:var(--fg);text-decoration:none;background:var(--line-soft)}
.nav-right a.active{color:var(--fg);background:var(--line-soft)}
.pill{
  padding:8px 14px !important;
  border:1px solid var(--line);
  border-radius:999px;
  background: var(--card);
  color:var(--fg) !important;
}
.iconbtn{
  display:inline-grid;place-items:center;
  width:36px;height:36px;border-radius:50%;
  border:1px solid var(--line); background:var(--card);
  color:var(--fg); cursor:pointer; transition:transform .15s, background .15s;
}
.iconbtn:hover{transform:translateY(-1px)}
html[data-theme="light"] .only-dark{display:none}
html[data-theme="dark"]  .only-light{display:none}

/* ---------- Icons ---------- */
.ic{width:18px;height:18px}
.ic-sm{width:15px;height:15px;vertical-align:-2px}
.ic-md{width:22px;height:22px;color:var(--accent)}
.ic-xs{width:12px;height:12px;vertical-align:-1px}

/* ---------- Hero ---------- */
.hero{
  position:relative; overflow:hidden;
  display:flex; flex-direction:column; align-items:center; text-align:center;
  gap:6px;
  padding:42px 8px 24px;
}
.hero-left{ width:100%; max-width:740px; }
.hero-bg{position:absolute;inset:-40px;pointer-events:none;z-index:0}
.hero-bg .orb{
  position:absolute;width:380px;height:380px;border-radius:50%;
  filter:blur(60px); opacity:.55;
}
.orb-a{background: radial-gradient(circle, var(--accent) 0%, transparent 60%); top:-80px; right:-60px}
.orb-b{background: radial-gradient(circle, var(--gold)   0%, transparent 60%); bottom:-120px; left:-80px; opacity:.4}
.hero-bg .grid{
  position:absolute;inset:0;
  background-image:
    linear-gradient(to right, color-mix(in oklab, var(--fg) 6%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in oklab, var(--fg) 6%, transparent) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 30%, transparent 75%);
}
.hero > *{position:relative;z-index:1}

.kicker{
  display:inline-flex;align-items:center;gap:8px;
  color:var(--muted);font-size:13px;
  padding:5px 11px;border:1px solid var(--line);border-radius:999px;
  background: color-mix(in oklab, var(--card) 65%, transparent);
  margin-bottom:14px;
}
.kicker .ic-sm{color:var(--gold)}

h1{
  font-family:var(--font-serif);
  font-size: clamp(40px, 5.8vw, 64px);
  line-height:1.02; letter-spacing:-.02em;
  margin:6px 0 14px;
  font-weight:600;
}
.thin{font-weight:300;color:var(--muted)}
.grad{
  background: linear-gradient(110deg, var(--fg) 30%, var(--accent) 70%, var(--accent-2) 100%);
  -webkit-background-clip:text; background-clip:text; color:transparent;
}

.lead{
  font-size:17.5px;color:var(--fg-soft);max-width:60ch;margin:0 0 18px;
}

/* New: hero intro paragraph block (replaces the big H1 + blurb) */
.intro{
  margin: 14px auto 18px;
  max-width: 62ch;
  text-align: left;
}
.intro p{
  font-family: var(--font-serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--fg-soft);
  margin: 0 0 12px;
  letter-spacing: -0.005em;
}
.intro p:last-of-type{ margin-bottom: 0 }
.intro strong{ color: var(--fg); font-weight: 600 }
.intro .mono{
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--fg-soft);
  background: var(--chip);
  border: 1px solid var(--line);
  padding: 1px 7px;
  border-radius: 6px;
  white-space: nowrap;
}
@media (max-width: 600px){
  .intro p{ font-size: 16.5px }
}

.chips{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 18px;justify-content:center}
.chip{
  background:var(--chip);
  border:1px solid var(--line);
  padding:6px 11px;border-radius:999px;
  font-size:12.5px;color:var(--fg-soft);
}

.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:4px;justify-content:center}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--btn); color:var(--btnfg);
  padding:11px 16px; border-radius:999px;
  font-size:14px; font-weight:500;
  border:1px solid var(--btn); cursor:pointer;
  transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
  text-decoration:none !important;
  box-shadow: 0 6px 18px color-mix(in oklab, var(--btn) 18%, transparent);
}
.btn:hover{transform:translateY(-1px); box-shadow: 0 12px 24px color-mix(in oklab, var(--btn) 22%, transparent)}
.btn.ghost{background:transparent;color:var(--fg);border:1px solid var(--line); box-shadow:none}
.btn.ghost:hover{background:var(--line-soft)}

.social-row{
  display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 6px;justify-content:center;
}
.sociallink{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--line);border-radius:999px;
  background:var(--card); color:var(--fg-soft); font-size:13px;
  transition:transform .12s ease, color .12s ease, border-color .12s ease;
}
.sociallink:hover{text-decoration:none;color:var(--accent);border-color:color-mix(in oklab, var(--accent) 40%, var(--line));transform:translateY(-1px)}
.sociallink .ic{width:15px;height:15px}

.note{margin-top:18px;color:var(--muted);font-size:13px}

/* Portrait — let the photo's natural aspect ratio drive height
   so nothing gets cropped (feet stay attached). */
.hero-right{display:flex;align-items:flex-start;justify-content:center;margin-bottom:10px}
.portrait-wrap{position:relative;width:100%;max-width:280px;margin:0 auto;line-height:0}
.portrait{
  display:block;
  width:100%;height:auto;
  image-orientation:from-image;  /* honour EXIF rotation if present */
  border-radius:22px; border:1px solid var(--line);
  box-shadow: var(--shadow-lg);
  position:relative; z-index:1;
}
.portrait-ring{
  position:absolute; inset:-10px; border-radius:30px;
  background:
    conic-gradient(from 130deg, var(--accent), var(--gold), var(--accent-2), var(--accent));
  filter:blur(18px); opacity:.45; z-index:0;
  animation: spin 18s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg) } }
@media (prefers-reduced-motion: reduce){ .portrait-ring{animation:none} }

/* ---------- Sections ---------- */
.section{padding:32px 4px;border-top:1px solid var(--line)}
.section.page-head{border-top:none;padding-top:20px}
.section-head{display:flex;justify-content:space-between;align-items:baseline;gap:14px;margin-bottom:14px;flex-wrap:wrap}
.link-more{
  display:inline-flex;align-items:center;gap:6px;
  color:var(--accent);font-size:14px;font-weight:500;
}
.link-more:hover{text-decoration:none;opacity:.85}

.card{
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:18px;
  background:var(--card);
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover{transform:translateY(-2px); box-shadow: var(--shadow-lg); border-color: color-mix(in oklab, var(--accent) 25%, var(--line));}
.card.mini{display:flex;gap:12px;align-items:flex-start;padding:14px}
.card.mini p{margin:0;font-size:14px;color:var(--fg-soft)}
.award-body{display:flex;flex-direction:column;gap:4px;flex:1}
.award-when{
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--muted);font-variant-numeric:tabular-nums;
}
.card.accent{position:relative;overflow:hidden}
.card.accent::before{
  content:""; position:absolute; inset:0 auto 0 0; width:4px;
  background: linear-gradient(180deg, var(--accent), var(--gold));
}

.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width: 860px){ .grid-2,.grid-3{grid-template-columns:1fr} }

/* News */
.news-list{display:flex;flex-direction:column;gap:6px}
.news-item{
  display:grid;grid-template-columns:130px 1fr;gap:12px;
  padding:10px 12px;border-radius:12px;
  transition: background .15s;
}
.news-item:hover{background:var(--line-soft)}
.news-when{color:var(--muted);font-size:13px;font-variant-numeric:tabular-nums}
.news-what{color:var(--fg-soft);font-size:14.5px}
@media (max-width: 600px){ .news-item{grid-template-columns:1fr} }

/* Project cards */
.project .card-header{display:flex;justify-content:space-between;align-items:center;gap:10px}
.status{
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--gold);
  padding:3px 8px;border:1px solid color-mix(in oklab, var(--gold) 40%, var(--line));
  border-radius:999px;background:color-mix(in oklab, var(--gold) 8%, transparent);
}

/* Publications */
.pub-list{display:flex;flex-direction:column;gap:14px}
.pub{display:grid;grid-template-columns:80px 1fr;gap:18px;padding:18px 20px}
.pub-year-rail{
  font-family:var(--font-serif);font-size:42px;line-height:1;
  color:transparent;
  -webkit-text-stroke:1px color-mix(in oklab, var(--accent) 50%, var(--muted));
  letter-spacing:-.02em;
  padding-top:4px;
}
.pub-title{margin:0 0 6px;font-size:18px}
.pub-venue{margin-top:2px}
.pub-summary{margin:8px 0 12px;color:var(--fg-soft);font-size:14.5px}
.pub-links{display:flex;flex-wrap:wrap;gap:8px}
.chip-link{
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 10px;border:1px solid var(--line);border-radius:999px;
  background:var(--card);color:var(--fg-soft);
  font-size:12.5px;
  transition:color .15s, border-color .15s, transform .12s;
}
.chip-link:hover{color:var(--accent);border-color:color-mix(in oklab, var(--accent) 40%, var(--line));text-decoration:none;transform:translateY(-1px)}
@media (max-width: 600px){ .pub{grid-template-columns:1fr} .pub-year-rail{font-size:28px} }

.pub-mini{padding:8px 0;border-top:1px dashed var(--line)}
.pub-mini:first-of-type{border-top:none;padding-top:2px}
.pub-mini .pub-title{font-family:var(--font-serif);font-weight:600;font-size:15.5px;margin:0 0 2px}

/* Experience cards */
.exp-list{display:flex;flex-direction:column;gap:14px}
.exp{display:grid;grid-template-columns:140px 1fr;gap:18px;padding:18px 20px}
.exp-rail{
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
  color:var(--muted);font-variant-numeric:tabular-nums;
  padding-top:5px;border-right:1px dashed var(--line);
}
.exp-head{margin-bottom:8px}
.exp-where{
  font-family:var(--font-serif);font-size:18px;font-weight:600;margin:0;
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
}
.exp-meta{display:flex;flex-wrap:wrap;align-items:baseline;gap:6px;margin-top:4px;font-size:13.5px}
.exp-role{
  font-size:12px;font-weight:600;color:var(--accent);
  padding:2px 9px;border-radius:999px;
  background:color-mix(in oklab, var(--accent) 8%, transparent);
  border:1px solid color-mix(in oklab, var(--accent) 25%, var(--line));
}
.exp-summary p{margin:0 0 8px;font-size:14.5px;color:var(--fg-soft);line-height:1.6}
.exp-summary p:last-child{margin-bottom:0}
.exp-summary strong{color:var(--fg);font-weight:600}
@media (max-width: 600px){
  .exp{grid-template-columns:1fr;gap:8px}
  .exp-rail{border-right:none;border-bottom:1px dashed var(--line);padding-bottom:6px;padding-top:0}
}

/* Teaching list */
.teach-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.teach-item{
  display:flex;flex-direction:column;gap:2px;
  padding:10px 12px;border-radius:12px;
  background:var(--bg-soft);
  border:1px solid var(--line-soft);
  transition:border-color .15s, transform .12s;
}
.teach-item:hover{border-color:color-mix(in oklab, var(--accent) 35%, var(--line)); transform:translateY(-1px)}
.teach-line{display:flex;flex-wrap:wrap;align-items:baseline;gap:8px}
.teach-code{
  font-family:var(--font-mono);font-size:12.5px;font-weight:600;letter-spacing:.02em;
  color:var(--accent);
  background:color-mix(in oklab, var(--accent) 8%, transparent);
  padding:2px 7px;border-radius:6px;
  border:1px solid color-mix(in oklab, var(--accent) 25%, var(--line));
}
.teach-title{font-family:var(--font-serif);font-size:15.5px;color:var(--fg);font-weight:500}
.teach-meta{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-size:13px}
.teach-role{
  font-size:11px;letter-spacing:.08em;text-transform:uppercase;
  color:var(--fg-soft);
  padding:2px 8px;border:1px solid var(--line);border-radius:999px;
  background:var(--card);
}
.teach-role.lect{color:var(--gold);border-color:color-mix(in oklab, var(--gold) 40%, var(--line));background:color-mix(in oklab, var(--gold) 8%, transparent)}
.teach-note{color:var(--muted);font-size:12.5px}

/* Timeline */
.timeline{position:relative;padding-left:18px;margin-top:6px}
.timeline::before{
  content:"";position:absolute;left:6px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(180deg, var(--accent), color-mix(in oklab, var(--accent) 0%, transparent));
  border-radius:2px;opacity:.5;
}
.tl-item{position:relative;padding:8px 0 12px 12px}
.tl-dot{
  position:absolute;left:-2px;top:14px;
  width:12px;height:12px;border-radius:50%;
  background:var(--card);border:2px solid var(--accent);
  box-shadow:0 0 0 4px color-mix(in oklab, var(--accent) 18%, transparent);
}
.tl-when{color:var(--muted);font-size:13px;margin-bottom:2px;font-variant-numeric:tabular-nums}
.tl-where{font-size:14.5px;color:var(--fg-soft)}

/* Contact */
.contact-card{
  display:flex;justify-content:space-between;align-items:center;gap:18px;
  flex-wrap:wrap;
}
.contact-card .mono.big{font-size:17px;letter-spacing:.01em}

/* Footer */
.footer{
  margin-top:36px;padding-top:18px;border-top:1px solid var(--line);
  color:var(--muted);font-size:13px;
  display:flex;justify-content:space-between;align-items:center;gap:12px;flex-wrap:wrap;
}
.footer-right{display:flex;gap:8px}
.iconlink{
  display:inline-grid;place-items:center;
  width:34px;height:34px;border-radius:50%;
  border:1px solid var(--line);background:var(--card);
  color:var(--fg-soft);transition:color .15s, border-color .15s, transform .12s;
}
.iconlink:hover{color:var(--accent);border-color:color-mix(in oklab, var(--accent) 40%, var(--line));transform:translateY(-1px);text-decoration:none}

/* Reveal animation */
.reveal{opacity:0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease}
.reveal.in{opacity:1; transform:none}
@media (prefers-reduced-motion: reduce){
  .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- Responsive tweaks ---------- */
@media (max-width: 860px){
  .hero{padding-top:24px}
  .portrait-wrap{max-width:200px}
  .nav{padding:8px 12px;gap:8px}
  .nav-right{gap:4px}
  .nav-right a{padding:6px 6px;font-size:13px}
  .subtitle{display:none}
}
@media (max-width: 480px){
  h1{font-size:36px}
  .brand-text .brand{font-size:12.5px}
}