/* ==========================================================================
   Dario Fumarola — personal site
   Design tokens + layout. Shared vocabulary with assets/css/paper.css.
   ========================================================================== */

:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --surface-2: #f4f2ef;
  --border: #e5e2dd;
  --border-strong: #d6d2cb;
  --text: #1c1917;
  --text-2: #44403c;
  --muted: #6f6a63;
  --faint: #a29d95;
  --accent: #1d4ed8;
  --accent-hover: #1e40af;
  --accent-tint: rgba(29, 78, 216, 0.08);
  --ring: rgba(29, 78, 216, 0.35);
  --shadow-sm: 0 1px 2px rgba(28, 25, 23, 0.05);
  --shadow-md: 0 2px 8px rgba(28, 25, 23, 0.07), 0 8px 24px rgba(28, 25, 23, 0.05);

  --badge-icml-bg: #e7f6ef;
  --badge-icml-fg: #047857;
  --badge-neurips-bg: #f1edfd;
  --badge-neurips-fg: #6d28d9;
  --badge-nyrl-bg: #fdeef0;
  --badge-nyrl-fg: #be123c;

  --font-serif: "Crimson Pro", "Iowan Old Style", Georgia, "Times New Roman", serif;
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

[data-theme="dark"] {
  --bg: #101014;
  --surface: #17171c;
  --surface-2: #1e1e24;
  --border: #2a2a32;
  --border-strong: #3a3a44;
  --text: #e8e6e3;
  --text-2: #c8c5c0;
  --muted: #9c98a0;
  --faint: #6b6873;
  --accent: #7aa2f7;
  --accent-hover: #9db9f9;
  --accent-tint: rgba(122, 162, 247, 0.12);
  --ring: rgba(122, 162, 247, 0.4);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.45), 0 8px 24px rgba(0, 0, 0, 0.35);

  --badge-icml-bg: rgba(16, 185, 129, 0.14);
  --badge-icml-fg: #4ade80;
  --badge-neurips-bg: rgba(139, 92, 246, 0.16);
  --badge-neurips-fg: #b8a5f8;
  --badge-nyrl-bg: rgba(244, 63, 94, 0.14);
  --badge-nyrl-fg: #fb8ba0;
}

/* ---------- Base ---------- */

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 24px; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.25s ease, color 0.25s ease;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.25;
  color: var(--text);
  margin: 0 0 0.6em;
}

p { margin: 0 0 1.1em; }

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.15s ease;
}
a:hover { color: var(--accent-hover); text-decoration: underline; text-underline-offset: 3px; }

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
  border-radius: 4px;
}

strong, b { color: var(--text); font-weight: 600; }

::selection { background: var(--accent-tint); }

img { max-width: 100%; height: auto; }

/* ---------- Page frame ---------- */

.wrapper {
  max-width: 1100px;
  margin: 0 auto;
  padding: 56px 28px 40px;
  display: grid;
  grid-template-columns: 296px minmax(0, 1fr);
  gap: 64px;
  align-items: start;
}

/* ---------- Sidebar ---------- */

.site-header {
  position: sticky;
  top: 56px;
}

.site-header .site-name {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 22px 0 4px;
}
.site-header .site-name a { color: var(--text); }
.site-header .site-name a:hover { color: var(--accent); text-decoration: none; }

.site-role {
  color: var(--text-2);
  font-size: 0.95rem;
  margin: 0 0 14px;
}

.site-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.02rem;
  color: var(--muted);
  border-left: 2px solid var(--border-strong);
  padding-left: 12px;
  margin: 0 0 22px;
}

/* Contact links */
.contact-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin: 0 0 26px;
}
.contact-links a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-2);
  font-size: 0.92rem;
  padding: 6px 8px;
  margin-left: -8px;
  border-radius: 8px;
}
.contact-links a:hover {
  color: var(--accent);
  background: var(--accent-tint);
  text-decoration: none;
}
.contact-links svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  stroke: currentColor;
  opacity: 0.75;
}

/* Sidebar nav */
.site-nav {
  border-top: 1px solid var(--border);
  padding-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.site-nav a {
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 7px 8px;
  margin-left: -8px;
  border-radius: 8px;
}
.site-nav a:hover {
  color: var(--accent);
  background: var(--accent-tint);
  text-decoration: none;
}

.header-updated {
  margin-top: 26px;
  font-size: 0.8rem;
  color: var(--faint);
}

/* ---------- Slideshow ---------- */

.slideshow {
  position: relative;
  width: 100%;
  max-width: 296px;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-md);
  background: var(--surface-2);
}
.slideshow .slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 1.2s ease-in-out;
}
.slideshow .slide.active { opacity: 1; }

/* ---------- Theme toggle ---------- */

.theme-toggle {
  position: fixed;
  top: 18px;
  right: 18px;
  z-index: 50;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  cursor: pointer;
  box-shadow: var(--shadow-sm);
  transition: color 0.15s ease, border-color 0.15s ease, background-color 0.25s ease;
}
.theme-toggle:hover { color: var(--accent); border-color: var(--border-strong); }
.theme-toggle svg { width: 18px; height: 18px; stroke: currentColor; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* ---------- Content ---------- */

section.content { min-width: 0; }

.content h2 {
  font-size: 1.55rem;
  margin: 0 0 0.8em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid var(--border);
}
.content h2:not(:first-child) { margin-top: 2.4em; }

.content h3 {
  font-size: 1.2rem;
  margin: 1.8em 0 0.6em;
}

.content p, .content li { color: var(--text-2); }
.content ul { padding-left: 1.3em; margin: 0 0 1.1em; }
.content li { margin: 0.35em 0; }

.lede { font-size: 1.04rem; }

/* Interest cards */
.interest-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0 0 1.2em;
}
.interest-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 18px 14px;
}
.interest-card h3 {
  margin: 0 0 8px;
  font-size: 1.08rem;
}
.interest-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--muted);
}

/* Project cards */
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 22px 24px;
  margin-bottom: 16px;
  box-shadow: var(--shadow-sm);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.project-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}

.project-card h3 {
  margin: 0 0 10px;
  font-size: 1.22rem;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 8px 12px;
}
.project-card h3 a { color: var(--text); }
.project-card h3 a:hover { color: var(--accent); text-decoration: none; }

.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.93rem;
  line-height: 1.65;
}

.card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.card-links a {
  font-size: 0.85rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.card-links svg { width: 13px; height: 13px; stroke: currentColor; }

/* Venue badges */
.venue-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-family: var(--font-sans);
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
  transform: translateY(-2px);
}
.venue-badge.icml { background: var(--badge-icml-bg); color: var(--badge-icml-fg); }
.venue-badge.neurips { background: var(--badge-neurips-bg); color: var(--badge-neurips-fg); }
.venue-badge.nyrl { background: var(--badge-nyrl-bg); color: var(--badge-nyrl-fg); }

/* Segmented tab control */
.pill-toggle {
  display: inline-flex;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 3px;
  margin-bottom: 20px;
  gap: 2px;
}
.pill-btn {
  padding: 7px 20px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color 0.2s ease, background-color 0.2s ease, box-shadow 0.2s ease;
}
.pill-btn:hover:not(.active) { color: var(--text); }
.pill-btn.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  padding: 6px 19px;
}
.projects-section { display: none; }
.projects-section.active { display: block; animation: fadeIn 0.25s ease; }

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Experience */
.xp-item { margin-bottom: 1.4em; }
.xp-item h3 { margin: 0 0 4px; font-size: 1.12rem; }
.xp-org { color: var(--muted); font-size: 0.88rem; margin: 0 0 8px; }
.xp-item p { margin: 0; }

/* Education */
.edu-degree { margin-bottom: 0.3em; }
.edu-meta { color: var(--muted); font-size: 0.9rem; }

/* Memberships */
.memberships {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  margin: 0.4em 0 1.1em;
  list-style: none;
}
.memberships li {
  margin: 0;
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  font-size: 0.84rem;
  color: var(--text-2);
}

/* ---------- Footer ---------- */

footer {
  grid-column: 1 / -1;
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  color: var(--faint);
  font-size: 0.82rem;
}
footer p { margin: 0; }
footer a { color: var(--muted); }

/* ---------- Responsive ---------- */

@media (max-width: 880px) {
  .wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 48px 20px 32px;
  }
  .site-header { position: static; }
  .slideshow { max-width: 240px; }
  .interest-grid { grid-template-columns: 1fr; }
  .site-nav { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}