/* ============================================================
   PARCO Lab — base.css
   Reset · Typography · Components · Grids · Footer
   ============================================================ */

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-system);
  font-size: var(--text-body);
  line-height: 1.47059;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
  transition: background 0.3s var(--ease-apple), color 0.3s var(--ease-apple);
}

::selection { background: rgba(0,113,227,0.18); color: var(--text-primary); }

a {
  color: var(--text-link);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease-apple);
}
a:hover { color: var(--text-link-hover); }

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

/* ── Containers ── */
.container       { max-width: var(--max-w);      margin: 0 auto; }
.container-wide  { max-width: var(--max-w-wide); margin: 0 auto; }
.container-text  { max-width: var(--max-w-text); margin: 0 auto; }

/* ── Section header ── */
.section-header { text-align: center; margin-bottom: clamp(40px,5vw,72px); }
.section-eyebrow {
  font-size: var(--text-caption); font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 12px; display: block;
}
.section-title {
  font-size: clamp(28px,4vw,52px); font-weight: 700;
  letter-spacing: -0.01em; line-height: 1.08;
  color: var(--text-primary); margin-bottom: 16px;
}
.section-subtitle {
  font-size: clamp(17px,1.8vw,21px); font-weight: 400;
  line-height: 1.38; color: var(--text-secondary);
  max-width: 560px; margin: 0 auto;
}

/* ── Divider ── */
.divider { height: 1px; background: var(--divider); border: none; margin: 0; }

/* ── Buttons ── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  font-family: var(--font-system); font-size: var(--text-callout);
  font-weight: 400; line-height: 1; border-radius: 980px;
  padding: 10px 20px; border: none; cursor: pointer; text-decoration: none;
  transition: background var(--dur-fast) var(--ease-apple),
              color var(--dur-fast) var(--ease-apple),
              transform var(--dur-fast) var(--ease-apple);
  white-space: nowrap; -webkit-font-smoothing: antialiased;
}
.btn:active { transform: scale(0.97); }
.btn-primary  { background: var(--accent); color: #FFF; }
.btn-primary:hover { background: var(--accent-hover); color: #FFF; }
.btn-secondary { background: transparent; color: var(--accent); padding: 10px 0; border-radius: 0; }
.btn-secondary::after { content: ' ›'; font-size: 1.1em; }
.btn-secondary:hover { color: var(--accent-hover); }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); padding: 9px 19px; border-radius: 980px; }
.btn-ghost:hover { background: var(--accent); color: #FFF; }

/* ── Section block spacing ── */
.section-block { margin-bottom: clamp(48px,7vw,80px); }
.section-block:last-child { margin-bottom: 0; }

/* ══════════════════
   PERSON CARD
   ══════════════════ */
.person-card {
  background: var(--bg-card);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--dur-med) var(--ease-apple),
              box-shadow var(--dur-med) var(--ease-apple);
}
.person-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }

/* Avatar: real photo */
.person-avatar-img {
  width: 100%; aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  display: block;
  background: var(--avatar-bg);
  /* Fade in once loaded */
  opacity: 0;
  transition: opacity 0.4s var(--ease-apple);
}
.person-avatar-img.loaded { opacity: 1; }

/* Avatar: initials fallback */
.person-avatar-fallback {
  width: 100%; aspect-ratio: 1 / 1;
  background: var(--avatar-bg);
  display: flex; align-items: center; justify-content: center;
  font-size: clamp(1.8rem,4vw,2.8rem); font-weight: 700;
  color: var(--accent); letter-spacing: -0.02em;
  transition: background 0.3s var(--ease-apple), color 0.3s var(--ease-apple);
}

.person-body { padding: 18px 20px 20px; }
.person-name  { font-size: var(--text-title); font-weight: 700; letter-spacing: -0.003em; color: var(--text-primary); margin-bottom: 2px; }
.person-role  { font-size: var(--text-callout); color: var(--accent); margin-bottom: 8px; }
.person-area  { font-size: var(--text-caption); line-height: 1.5; color: var(--text-secondary); }
.person-office { font-size: var(--text-caption); color: var(--text-tertiary); margin-top: 4px; }
.person-link  {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: var(--text-caption); color: var(--accent); text-decoration: none;
  margin-top: 10px; transition: color var(--dur-fast) var(--ease-apple);
}
.person-link::after { content: ' ›'; }
.person-link:hover  { color: var(--accent-hover); }

/* ══════════════════
   RESEARCH CARD
   ══════════════════ */
.research-card {
  background: var(--bg-card); border-radius: var(--r-xl); padding: 32px;
  transition: background var(--dur-fast) var(--ease-apple),
              transform var(--dur-med) var(--ease-apple),
              box-shadow var(--dur-med) var(--ease-apple);
}
.research-card:hover { background: var(--bg-card-hover); transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.rc-num   { font-size: var(--text-caption); font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.rc-title { font-size: 19px; font-weight: 700; letter-spacing: -0.003em; line-height: 1.2; color: var(--text-primary); margin-bottom: 10px; }
.rc-desc  { font-size: var(--text-callout); line-height: 1.5; color: var(--text-secondary); }
.rc-tags  { margin-top: 16px; display: flex; flex-wrap: wrap; gap: 6px; }
.rc-tag   { font-size: 11px; font-weight: 500; padding: 3px 10px; border-radius: 980px; background: var(--bg-tertiary); color: var(--text-secondary); letter-spacing: 0.02em; }

/* ══════════════════
   PUB ITEM
   ══════════════════ */
.pub-item {
  padding: 20px 0; border-bottom: 1px solid var(--divider);
  display: grid; grid-template-columns: 56px 1fr auto;
  gap: 20px; align-items: start; cursor: pointer;
  transition: opacity var(--dur-fast) var(--ease-apple);
}
.pub-item:hover { opacity: 0.7; }
.pub-year    { font-size: var(--text-title); font-weight: 700; color: var(--text-tertiary); letter-spacing: -0.01em; line-height: 1; padding-top: 3px; }
.pub-title   { font-size: var(--text-callout); font-weight: 600; color: var(--text-primary); line-height: 1.35; margin-bottom: 4px; }
.pub-authors { font-size: var(--text-caption); color: var(--text-secondary); margin-bottom: 3px; }
.pub-venue   { font-size: var(--text-caption); color: var(--text-tertiary); }
.pub-badge   { font-size: 10px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; padding: 3px 9px; border-radius: 980px; background: var(--bg-tertiary); color: var(--text-secondary); height: fit-content; white-space: nowrap; }

/* ══════════════════
   PROJECT ITEM
   ══════════════════ */
.proj-item {
  padding: 20px 24px; border-radius: var(--r-md);
  display: flex; gap: 20px; align-items: flex-start;
  transition: background var(--dur-fast) var(--ease-apple); cursor: pointer;
}
.proj-item:hover { background: var(--bg-card); }
.proj-dot   { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); margin-top: 5px; flex-shrink: 0; }
.proj-body  { flex: 1; }
.proj-title { font-size: var(--text-callout); font-weight: 600; color: var(--text-primary); line-height: 1.35; margin-bottom: 4px; }
.proj-funder{ font-size: var(--text-caption); color: var(--text-secondary); }
.proj-year  { font-size: var(--text-headline); font-weight: 700; color: var(--text-tertiary); letter-spacing: -0.01em; line-height: 1; min-width: 48px; text-align: right; flex-shrink: 0; }

/* ══════════════════
   HW CARD
   ══════════════════ */
.hw-card {
  background: var(--bg-card); border-radius: var(--r-md); padding: 20px 24px;
  display: flex; gap: 16px; align-items: flex-start;
  transition: background var(--dur-fast) var(--ease-apple);
}
.hw-card:hover { background: var(--bg-card-hover); }
.hw-dot  { width: 8px; height: 8px; border-radius: 50%; background: var(--accent); flex-shrink: 0; margin-top: 4px; }
.hw-name { font-size: var(--text-caption); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--accent); margin-bottom: 6px; }
.hw-spec { font-size: var(--text-caption); color: var(--text-secondary); line-height: 1.5; }

/* ══════════════════
   SPINOFF CARD
   ══════════════════ */
.spinoff-card {
  background: var(--bg-card); border-radius: var(--r-xl); padding: 32px;
  transition: background var(--dur-fast) var(--ease-apple),
              transform var(--dur-med) var(--ease-apple),
              box-shadow var(--dur-med) var(--ease-apple);
}
.spinoff-card:hover { background: var(--bg-card-hover); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.spinoff-code    { font-size: 13px; font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--accent); margin-bottom: 8px; }
.spinoff-name    { font-size: var(--text-title); font-weight: 700; letter-spacing: -0.003em; color: var(--text-primary); margin-bottom: 4px; }
.spinoff-founded { font-size: var(--text-caption); color: var(--text-tertiary); margin-bottom: 14px; }
.spinoff-desc    { font-size: var(--text-callout); line-height: 1.5; color: var(--text-secondary); margin-bottom: 16px; }
.spinoff-link    { font-size: var(--text-callout); color: var(--accent); text-decoration: none; display: inline-flex; align-items: center; gap: 4px; transition: color var(--dur-fast) var(--ease-apple); }
.spinoff-link::after { content: ' ›'; font-size: 1.1em; }
.spinoff-link:hover  { color: var(--accent-hover); }

/* ══════════════════
   FILTER BAR
   ══════════════════ */
.filter-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 32px; }
.filter-btn {
  font-family: var(--font-system); font-size: var(--text-caption); font-weight: 500;
  padding: 6px 16px; border-radius: 980px; border: none;
  background: var(--bg-card); color: var(--text-secondary); cursor: pointer;
  transition: background var(--dur-fast) var(--ease-apple),
              color var(--dur-fast) var(--ease-apple);
  -webkit-font-smoothing: antialiased;
}
.filter-btn:hover  { background: var(--bg-card-hover); }
.filter-btn.active { background: var(--text-primary); color: var(--bg-primary); }

/* ══════════════════
   PEOPLE LABEL
   ══════════════════ */
.people-label {
  font-size: var(--text-caption); font-weight: 600; letter-spacing: 0.06em;
  text-transform: uppercase; color: var(--text-tertiary);
  margin-bottom: 20px; padding-bottom: 12px; border-bottom: 1px solid var(--divider);
}

/* ══════════════════
   GRIDS
   ══════════════════ */
.grid-auto-280 { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px,1fr)); gap: 16px; }
.grid-auto-200 { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px,1fr)); gap: 16px; }
.grid-auto-240 { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px,1fr)); gap: 12px; }

/* ══════════════════
   REVEAL
   ══════════════════ */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity var(--dur-slow) var(--ease-apple),
              transform var(--dur-slow) var(--ease-apple);
}
.reveal.visible { opacity: 1; transform: none; }

/* ══════════════════
   FOOTER
   ══════════════════ */
footer {
  background: var(--bg-secondary); padding: 64px var(--section-h) 24px;
  transition: background 0.3s var(--ease-apple);
}
.footer-top {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px; margin-bottom: 48px; padding-bottom: 48px;
  border-bottom: 1px solid var(--divider);
}
.footer-brand   { font-size: var(--text-body); font-weight: 700; color: var(--text-primary); letter-spacing: -0.003em; margin-bottom: 8px; }
.footer-tagline { font-size: var(--text-caption); color: var(--text-secondary); line-height: 1.6; max-width: 220px; }
.footer-col h4  { font-size: var(--text-caption); font-weight: 600; letter-spacing: 0.04em; text-transform: uppercase; color: var(--text-primary); margin-bottom: 14px; }
.footer-col ul  { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-col a   { font-size: var(--text-caption); color: var(--text-secondary); text-decoration: none; transition: color var(--dur-fast) var(--ease-apple); }
.footer-col a:hover { color: var(--text-primary); }
.footer-bottom  { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.footer-copy    { font-size: var(--text-caption); color: var(--text-tertiary); }

/* ══════════════════
   RESPONSIVE
   ══════════════════ */
@media (max-width: 768px) {
  .pub-item  { grid-template-columns: 48px 1fr; }
  .pub-badge { display: none; }
  .proj-item { flex-wrap: wrap; }
  .grid-auto-280, .grid-auto-240 { grid-template-columns: 1fr; }
  .grid-auto-200 { grid-template-columns: repeat(auto-fill, minmax(145px,1fr)); }
  .footer-top    { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 480px) {
  .footer-top { grid-template-columns: 1fr; }
}

/* ── Collapsible list ── */
.list-collapsed .collapsible-item:nth-child(n+6) {
  display: none;
}
.list-toggle-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 20px;
  font-family: var(--font-system);
  font-size: var(--text-caption);
  font-weight: 500;
  color: var(--accent);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  transition: color var(--dur-fast) var(--ease-apple);
  -webkit-font-smoothing: antialiased;
}
.list-toggle-btn:hover { color: var(--accent-hover); }
.list-toggle-btn .toggle-icon {
  width: 18px; height: 18px;
  border-radius: 50%;
  border: 1.5px solid var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; line-height: 1;
  transition: transform var(--dur-med) var(--ease-apple);
  flex-shrink: 0;
}
.list-collapsed .toggle-icon { transform: rotate(0deg); }
.list-expanded  .toggle-icon { transform: rotate(45deg); }

.collapsible-wrap {
  position: relative;
  --collapsed-list-height: min(31rem, 52vh);
}
.collapsible-list {
  position: relative;
  transition: max-height var(--dur-med) var(--ease-apple);
}
.collapsible-list.list-collapsed {
  max-height: var(--collapsed-list-height);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: none;
  -ms-overflow-style: none;
  mask-image: linear-gradient(180deg, #000 0%, #000 84%, transparent 100%);
  -webkit-mask-image: linear-gradient(180deg, #000 0%, #000 84%, transparent 100%);
}
.collapsible-list.list-collapsed::-webkit-scrollbar { display: none; }
.collapsible-list.list-expanded {
  max-height: none;
  overflow: visible;
  mask-image: none;
  -webkit-mask-image: none;
}
.collapsible-list.list-collapsed .proj-item:nth-child(n+6) { display: flex; }
.collapsible-list.list-collapsed .pub-item:nth-child(n+6) { display: grid; }
.list-toggle-row {
  display: flex;
  justify-content: center;
  padding-top: 18px;
}
.collapsible-wrap.list-expanded .list-toggle-row {
  position: sticky;
  bottom: 18px;
  z-index: 2;
  padding-top: 24px;
  padding-bottom: 4px;
  pointer-events: none;
}
.collapsible-wrap.list-expanded .list-toggle-row::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255,255,255,0) 0%, var(--bg-primary) 72%);
  z-index: -1;
}
#section-pubblicazioni .collapsible-wrap.list-expanded .list-toggle-row::before {
  background: linear-gradient(180deg, rgba(255,255,255,0) 0%, var(--bg-secondary) 72%);
}
[data-theme="dark"] .collapsible-wrap.list-expanded .list-toggle-row::before {
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, var(--bg-primary) 72%);
}
[data-theme="dark"] #section-pubblicazioni .collapsible-wrap.list-expanded .list-toggle-row::before {
  background: linear-gradient(180deg, rgba(0,0,0,0) 0%, var(--bg-secondary) 72%);
}
.list-toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 38px;
  margin-top: 0;
  padding: 8px 16px;
  border-radius: 980px;
  border: 1px solid var(--divider);
  background: color-mix(in srgb, var(--bg-card) 92%, transparent);
  box-shadow: var(--shadow-xs);
  font-size: var(--text-caption);
  font-weight: 600;
  color: var(--text-primary);
  transition: transform var(--dur-med) var(--ease-spring),
              background var(--dur-fast) var(--ease-apple),
              border-color var(--dur-fast) var(--ease-apple),
              box-shadow var(--dur-fast) var(--ease-apple),
              color var(--dur-fast) var(--ease-apple);
}
.collapsible-wrap.list-expanded .list-toggle-btn { pointer-events: auto; }
.list-toggle-btn:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
}
.list-toggle-btn .toggle-icon {
  width: 14px;
  height: 14px;
  border: none;
  border-radius: 0;
  position: relative;
  transform: none;
  flex-shrink: 0;
}
.list-toggle-btn.list-collapsed .toggle-icon,
.list-toggle-btn.list-expanded .toggle-icon { transform: none; }
.list-toggle-btn .toggle-icon::before {
  content: "";
  position: absolute;
  top: 2px;
  left: 2px;
  width: 8px;
  height: 8px;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg);
  transform-origin: center;
  transition: transform var(--dur-med) var(--ease-spring);
}
.list-expanded .toggle-icon::before { transform: rotate(-135deg); }