/* ============================================================
   Luca Geminiani — personal site
   ============================================================ */

:root {
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
  --font-head: 'Space Grotesk', var(--font-body);
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  --max-w: 1060px;
  --radius: 14px;
}

html[data-theme="light"] {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f3f4f9;
  --border: #e3e6f0;
  --text: #181c2e;
  --text-muted: #5d667f;
  --accent: #4f46e5;
  --accent-2: #0ea5e9;
  --nav-bg: rgba(255, 255, 255, 0.85);
  color-scheme: light;
}

html[data-theme="dark"] {
  --bg: #0b0e1a;
  --surface: #121829;
  --surface-2: #18203a;
  --border: #232c4a;
  --text: #e8ebf5;
  --text-muted: #97a0ba;
  --accent: #6ee7ff;
  --accent-2: #a78bfa;
  --nav-bg: rgba(11, 14, 26, 0.75);
  color-scheme: dark;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 4rem; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.mono { font-family: var(--font-mono); }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.15; }

::selection { background: var(--accent-2); color: #fff; }

/* ============ Nav ============ */

.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease;
}
.nav.scrolled { border-bottom-color: var(--border); }

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0.7rem 1.4rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-brand {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--text);
  letter-spacing: 0.02em;
}
.nav-brand:hover { text-decoration: none; }
.nav-brand-dot { color: var(--accent); }

.nav-links { display: flex; gap: 1.2rem; }
.nav-links a {
  white-space: nowrap;
  color: var(--text-muted);
  font-size: 0.93rem;
  font-weight: 500;
}
.nav-links a:hover { color: var(--text); text-decoration: none; }

.nav-icons {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}
.nav-icons a, .theme-toggle {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  color: var(--text-muted);
  font-size: 0.95rem;
  transition: color 0.2s, background-color 0.2s;
}
.nav-icons a:hover, .theme-toggle:hover {
  color: var(--text);
  background: var(--surface-2);
  text-decoration: none;
}

.theme-toggle {
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}
html[data-theme="dark"] .theme-toggle .fa-moon { display: none; }
html[data-theme="light"] .theme-toggle .fa-sun { display: none; }

/* phones: just the logo and icons */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .nav-inner { gap: 1rem; }
}
@media (max-width: 430px) {
  .nav-icons a[aria-label="Email"] { display: none; }
}

/* ============ Hero ============ */

.hero {
  /* capped so zooming out doesn't add ever more white space below the plot */
  min-height: min(78svh, 780px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 6rem 1.4rem 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 760px;
}

/* GP band under the hero text: full-bleed, fading out at the edges.
   --gp-pad is transparent headroom above and below the plot that overlaps
   the neighbouring whitespace, so curves swinging wide are never cut off. */
.gp-canvas {
  --gp-pad: 44px;
  display: block;
  /* full-bleed on normal screens, but capped so zooming out on a wide screen
     doesn't stretch the plot into a long flat line */
  width: min(calc(100% + 2.8rem), 1600px);
  height: calc(clamp(240px, 38vh, 400px) + 2 * var(--gp-pad));
  margin: calc(2.2rem - var(--gp-pad)) 0 calc(-1 * var(--gp-pad));
  cursor: crosshair;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
html:not(.js) .gp-canvas { display: none; }

/* phones: shorter band so the plot isn't stretched tall relative to its width */
@media (max-width: 700px) {
  .gp-canvas { height: calc(clamp(170px, 24vh, 230px) + 2 * var(--gp-pad)); }
}

.hero-name {
  font-size: clamp(2.6rem, 8vw, 4.6rem);
  font-weight: 700;
  margin: 0 0 0.6rem;
  letter-spacing: -0.02em;
  background: linear-gradient(100deg, var(--text) 30%, var(--accent) 65%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-tagline {
  font-size: clamp(1.02rem, 2.4vw, 1.22rem);
  color: var(--text-muted);
  margin: 0 auto 1.6rem;
  max-width: 620px;
}
.hero-tagline .accent { color: var(--text); font-weight: 600; }

.hero-cta { display: flex; gap: 0.7rem; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.15rem;
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 600;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.2s, border-color 0.2s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }

.btn-primary {
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 8px 24px -10px var(--accent);
}
html[data-theme="dark"] .btn-primary { color: #0b0e1a; }

.btn-ghost {
  border: 1px solid var(--border);
  color: var(--text);
  background: var(--surface);
}
.btn-ghost:hover { border-color: var(--accent); }

/* ============ Sections ============ */

.section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 4rem 1.4rem 1rem;
}

/* the GP band's headroom already adds space above the first section */
#about { padding-top: 2.75rem; }

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  margin-bottom: 2.2rem;
}
.section-num {
  color: var(--accent);
  font-size: 0.9rem;
}
.section-head h2 {
  font-size: clamp(1.7rem, 4vw, 2.3rem);
  margin: 0;
  letter-spacing: -0.01em;
}
.section-head::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--border), transparent);
  transform: translateY(-6px);
}

/* Reveal on scroll (only once JS has run, so content never stays hidden) */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.js .reveal.visible { opacity: 1; transform: none; }

/* ============ About ============ */

.about-grid {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 2.6rem;
  align-items: start;
}

.about-photo { position: relative; }
.about-photo img {
  display: block;
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  position: relative;
  z-index: 1;
}
.about-photo-glow {
  position: absolute;
  inset: 12px -12px -12px 12px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  opacity: 0.3;
  filter: blur(18px);
}

.about-text p { margin: 0 0 1rem; }
.about-text em { color: var(--text); }
.about-contact {
  font-size: 0.82rem;
  color: var(--text-muted);
}
.about-contact i { color: var(--accent); margin-right: 0.3rem; }

@media (max-width: 720px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-photo { max-width: 230px; }
}

/* ============ Publications ============ */

.pub-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.6rem;
}

.pub-filters { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.filter-chip {
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.83rem;
  font-weight: 500;
  padding: 0.42rem 0.95rem;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.filter-chip:hover { color: var(--text); border-color: var(--accent); }
.filter-chip.active {
  background: linear-gradient(110deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: #fff;
  font-weight: 600;
}
html[data-theme="dark"] .filter-chip.active { color: #0b0e1a; }

.pub-year {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--accent);
  margin: 2rem 0 0.9rem;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.pub-year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.pub-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: var(--radius);
  padding: 1.1rem 1.3rem;
  margin-bottom: 0.8rem;
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 1.1rem;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.pub-card:hover {
  border-color: color-mix(in srgb, var(--accent) 45%, var(--border));
  transform: translateX(4px);
}

.pub-venue-col { display: flex; flex-direction: column; gap: 0.4rem; align-items: flex-start; }

.venue-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  padding: 0.25rem 0.6rem;
  border-radius: 7px;
  white-space: nowrap;
}
.venue-neurips  { background: color-mix(in srgb, #a78bfa 18%, transparent); color: #7c3aed; }
.venue-preprint { background: color-mix(in srgb, #94a3b8 16%, transparent); color: #64748b; }
html[data-theme="dark"] .venue-neurips  { color: #a78bfa; }
html[data-theme="dark"] .venue-preprint { color: #94a3b8; }

.pub-title {
  font-weight: 600;
  font-size: 1.02rem;
  margin: 0 0 0.3rem;
  color: var(--text);
}

.pub-authors {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin: 0 0 0.55rem;
}
.pub-authors .me {
  color: var(--text);
  font-weight: 600;
  border-bottom: 2px solid color-mix(in srgb, var(--accent) 60%, transparent);
}

.pub-links { display: flex; gap: 0.45rem; flex-wrap: wrap; }
.pub-link {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.26rem 0.65rem;
  border-radius: 7px;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: none;
  cursor: pointer;
  transition: all 0.18s ease;
}
.pub-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  text-decoration: none;
}

.pub-abstract {
  display: none;
  margin-top: 0.7rem;
  padding: 0.8rem 1rem;
  border-left: 2px solid var(--accent);
  background: var(--surface-2);
  border-radius: 0 9px 9px 0;
  font-size: 0.86rem;
  color: var(--text-muted);
}
.pub-card.open .pub-abstract { display: block; }
.pub-card.open .pub-link.abs-btn { color: var(--accent); border-color: var(--accent); }

.pub-card.hidden { display: none; }

@media (max-width: 600px) {
  .pub-card { grid-template-columns: 1fr; gap: 0.6rem; }
  .pub-venue-col { flex-direction: row; align-items: center; }
}

/* ============ Beyond research ============ */

.life-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0;
  border: none;
  background: none;
  font: inherit;
  letter-spacing: inherit;
  color: inherit;
  cursor: pointer;
}
.life-toggle i {
  font-size: 0.5em;
  color: var(--accent);
  transition: transform 0.3s ease;
}
.life-toggle:hover i { transform: translateY(2px); }
#life.open .life-toggle i { transform: rotate(180deg); }

/* collapsed by default; animates open by growing the grid row */
.life-body {
  display: grid;
  grid-template-rows: 0fr;
  visibility: hidden;
  transition: grid-template-rows 0.45s ease, visibility 0s linear 0.45s;
}
.life-inner { overflow: hidden; min-height: 0; }
#life.open .life-body {
  grid-template-rows: 1fr;
  visibility: visible;
  transition: grid-template-rows 0.45s ease, visibility 0s;
}

.life-text { max-width: 760px; margin-bottom: 1.8rem; }
.life-text p { margin: 0 0 1rem; }

.gallery-title {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--accent);
  margin: 2.4rem 0 0.9rem;
  scroll-margin-top: 4rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.gallery-title::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--border);
}

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.6rem;
}
.gallery figure {
  margin: 0;
  overflow: hidden;
  border-radius: 10px;
  background: var(--surface-2);
}
.gallery img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  cursor: zoom-in;
  transition: transform 0.4s ease, filter 0.4s ease;
}
.gallery figure:hover img { transform: scale(1.04); filter: brightness(1.05); }

@media (max-width: 720px) {
  .gallery { grid-template-columns: repeat(2, 1fr); }
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background: rgba(11, 14, 26, 0.88);
  cursor: zoom-out;
}
.lightbox[hidden] { display: none; }
.lightbox img {
  max-width: min(100%, 1100px);
  max-height: calc(100svh - 5rem);
  border-radius: 10px;
  cursor: pointer;
}
.lightbox-btn {
  position: absolute;
  width: 44px;
  height: 44px;
  border: none;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 1.1rem;
  cursor: pointer;
  transition: background-color 0.2s;
}
.lightbox-btn:hover { background: rgba(255, 255, 255, 0.25); }
.lightbox-close { top: 1rem; right: 1rem; }
.lightbox-prev { left: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-next { right: 1rem; top: 50%; transform: translateY(-50%); }
.lightbox-count {
  position: absolute;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.78rem;
}
@media (max-width: 600px) {
  .lightbox-prev, .lightbox-next { top: auto; bottom: 0.6rem; transform: none; }
}

/* ============ Footer ============ */

.footer {
  max-width: var(--max-w);
  margin: 4rem auto 0;
  padding: 2.2rem 1.4rem 2.6rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
}
.footer p { margin: 0.3rem 0; }

/* ============ Toast ============ */

.toast {
  position: fixed;
  bottom: 1.6rem;
  left: 50%;
  transform: translate(-50%, 20px);
  background: var(--surface-2);
  border: 1px solid var(--accent);
  color: var(--text);
  font-size: 0.78rem;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease, transform 0.25s ease;
  z-index: 100;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ============ Reduced motion ============ */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js .reveal { opacity: 1; transform: none; transition: none; }
  * { transition-duration: 0.01ms !important; }
}