/* =========================================================
   site.css — Agostino Capponi academic website
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,600;0,700;1,400&display=swap');

/* ---------- Reset & base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --nav-bg:        #12122a;
  --nav-height:    64px;
  --accent:        #003DA5;
  --accent-light:  #0052cc;
  --accent-muted:  #e8eef8;
  --link:          #0052cc;
  --text:          #2d3748;
  --text-light:    #6b7a99;
  --light-bg:      #f7f8fc;
  --border:        #e2e8f0;
  --font:          'Rubik', sans-serif;
  --font-serif:    'Playfair Display', Georgia, serif;
  --shadow-sm:     0 1px 4px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow-md:     0 4px 20px rgba(0,0,0,.09), 0 2px 8px rgba(0,0,0,.05);
  --shadow-lg:     0 12px 48px rgba(0,0,0,.13);
  --radius:        14px;
  --tr:            .22s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: 1.0625rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--text);
  background: #fff;
  padding-top: var(--nav-height);
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
  transition: opacity var(--tr), color var(--tr);
}
a:hover { opacity: .78; }

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: var(--nav-bg);
  z-index: 1000;
  box-shadow: 0 2px 12px rgba(0,0,0,.4);
  transition: background var(--tr), backdrop-filter var(--tr), box-shadow var(--tr);
}

.navbar.scrolled {
  background: rgba(18,18,42,.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 2px 32px rgba(0,0,0,.35);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 28px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Brand */
.nav-brand {
  color: #fff;
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 600;
  font-family: var(--font-serif);
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: .01em;
}
.nav-brand:hover { text-decoration: none; opacity: .85; }

/* Nav links never underlined */
.nav-menu a,
.nav-brand,
.dropdown li a { text-decoration: none !important; }

/* Menu list */
.nav-menu {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-menu > li > .nav-link {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  padding: 0 15px;
  color: rgba(255,255,255,.88);
  text-decoration: none;
  font-size: .88rem;
  font-weight: 500;
  white-space: nowrap;
  transition: color var(--tr), background var(--tr);
  gap: 4px;
  letter-spacing: .02em;
}
.nav-menu > li > .nav-link:hover {
  background: rgba(255,255,255,.1);
  color: #fff;
}

/* Accent stripe on active link */
.nav-menu > li > .nav-link.active-page {
  color: #fff;
  box-shadow: inset 0 -3px 0 var(--accent-light);
}

/* Dropdown trigger caret */
.caret { font-size: .65rem; opacity: .7; }

/* Dropdown */
.has-dropdown { position: relative; }

.dropdown {
  list-style: none;
  position: absolute;
  top: var(--nav-height);
  left: 0;
  min-width: 300px;
  background: #1a1a38;
  box-shadow: 0 8px 32px rgba(0,0,0,.45);
  display: none;
  z-index: 1001;
  border-radius: 0 0 10px 10px;
  overflow: hidden;
  border-top: 2px solid var(--accent);
}

.has-dropdown:hover > .dropdown,
.has-dropdown.open   > .dropdown { display: block; }

.dropdown li a {
  display: block;
  padding: 11px 20px;
  color: rgba(255,255,255,.82);
  text-decoration: none;
  font-size: .84rem;
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: background var(--tr), color var(--tr), padding-left var(--tr);
}
.dropdown li:last-child a { border-bottom: none; }
.dropdown li a:hover {
  background: rgba(0,61,165,.35);
  color: #fff;
  padding-left: 26px;
}

/* Hamburger button */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  flex-shrink: 0;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .28s, opacity .28s;
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ==========================================================
   Hero (homepage only)
   ========================================================== */

.hero {
  background: linear-gradient(135deg, #f0f4ff 0%, #f7f8fc 60%, #fff 100%);
  border-bottom: 1px solid var(--border);
  padding: 72px 28px 64px;
}

.hero-inner {
  max-width: 1020px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 56px;
}

/* Photo */
.hero-photo { flex-shrink: 0; }

.profile-img {
  width: 210px;
  height: 210px;
  object-fit: cover;
  object-position: top center;
  border-radius: 50%;
  border: 4px solid #fff;
  box-shadow: 0 0 0 3px var(--accent), var(--shadow-lg);
  display: block;
}

/* Text side */
.hero-text { flex: 1; }

.hero-name {
  font-family: var(--font-serif);
  font-size: 2.6rem;
  font-weight: 700;
  color: #0d1332;
  line-height: 1.15;
  margin-bottom: 10px;
}

.hero-title {
  font-size: 1.05rem;
  font-weight: 400;
  color: var(--text-light);
  margin-bottom: 4px;
  line-height: 1.5;
}

.hero-affil {
  font-size: .95rem;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 22px;
  letter-spacing: .01em;
}

/* Award / affiliation badges */
.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}

.badge {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-muted);
  color: var(--accent);
  font-size: .78rem;
  font-weight: 600;
  border-radius: 999px;
  letter-spacing: .03em;
  border: 1px solid rgba(0,61,165,.15);
  text-decoration: none !important;
  transition: background var(--tr), border-color var(--tr), transform var(--tr);
}
a.badge:hover {
  background: #d6e4ff;
  border-color: rgba(0,61,165,.35);
  transform: translateY(-1px);
  opacity: 1;
}

/* Quick-link buttons */
.quick-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.ql-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: .88rem;
  font-weight: 500;
  text-decoration: none !important;
  transition: background var(--tr), color var(--tr), box-shadow var(--tr), transform var(--tr);
  line-height: 1;
}

.ql-btn-primary {
  background: var(--accent);
  color: #fff !important;
  box-shadow: 0 2px 10px rgba(0,61,165,.28);
}
.ql-btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 4px 18px rgba(0,61,165,.38);
  transform: translateY(-1px);
  opacity: 1;
}

.ql-btn-outline {
  background: #fff;
  color: var(--accent) !important;
  border: 1.5px solid rgba(0,61,165,.3);
  box-shadow: var(--shadow-sm);
}
.ql-btn-outline:hover {
  background: var(--accent-muted);
  border-color: var(--accent);
  transform: translateY(-1px);
  opacity: 1;
}

/* SVG icons inside buttons */
.ql-btn svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
}

/* ---------- Bio section ---------- */
.bio-section {
  padding: 56px 28px 72px;
}

.bio-content {
  max-width: 920px;
  margin: 0 auto;
}

.bio-content p {
  margin-bottom: 1.3rem;
}

.bio-content em { font-style: italic; }
.bio-content strong { font-weight: 500; }

/* ---------- Footer ---------- */
footer {
  background: var(--nav-bg);
  color: rgba(255,255,255,.6);
  text-align: center;
  padding: 40px 28px 36px;
  font-size: .88rem;
  border-top: none;
}

footer a {
  color: rgba(255,255,255,.75);
  text-decoration: underline;
  text-underline-offset: 2px;
}
footer a:hover { color: #fff; opacity: 1; }

.footer-inner {
  max-width: 720px;
  margin: 0 auto;
}

.footer-name {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 12px;
}

.footer-contact {
  margin-bottom: 20px;
  line-height: 1.7;
}

.footer-social {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 6px;
  background: rgba(255,255,255,.08);
  color: rgba(255,255,255,.75) !important;
  text-decoration: none !important;
  font-size: .82rem;
  font-weight: 500;
  transition: background var(--tr), color var(--tr);
}
.footer-social a:hover {
  background: rgba(255,255,255,.16);
  color: #fff !important;
  opacity: 1;
}
.footer-social svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

.footer-divider {
  width: 40px;
  height: 2px;
  background: rgba(255,255,255,.15);
  margin: 24px auto 20px;
  border-radius: 2px;
}

/* ==========================================================
   Fade-in animation (scroll-triggered via JS)
   ========================================================== */

.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s var(--tr), transform .6s var(--tr);
}
.fade-up.visible {
  opacity: 1;
  transform: none;
}

/* ==========================================================
   Subpage shared styles (used by page*.html)
   ========================================================== */

.page-section {
  max-width: 920px;
  margin: 0 auto;
  padding: 48px 28px 80px;
}

.page-section h1 {
  font-family: var(--font-serif);
  font-size: 1.85rem;
  font-weight: 700;
  margin-bottom: 32px;
  color: #0d1332;
  border-bottom: 2px solid var(--accent);
  padding-bottom: 14px;
  line-height: 1.25;
}

.page-section h2 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 32px 0 10px;
  color: #0d1332;
}

.page-section p  { margin-bottom: 1.1rem; }
.page-section ul { padding-left: 22px; margin-bottom: 1rem; }
.page-section li { margin-bottom: .5rem; }

/* Publication list (paragraph style) */
.pub-list p {
  margin-bottom: 1.2rem;
  line-height: 1.8;
}

/* Publication entry (card style) */
.pub-entry {
  margin-bottom: 1.4rem;
  padding: 18px 20px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--tr), transform var(--tr), border-color var(--tr);
}
.pub-entry:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-left-color: var(--accent-light);
}

.pub-title {
  font-weight: 500;
  color: #0d1332;
  line-height: 1.45;
}
.pub-authors { color: var(--text-light); font-size: .93rem; margin-top: 3px; }
.pub-venue   { color: #8898b8; font-size: .88rem; font-style: italic; margin-top: 2px; }
.pub-links   { margin-top: 8px; font-size: .87rem; }
.pub-links a { margin-right: 12px; }

/* Status badges on publications */
.pub-status {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  vertical-align: middle;
  margin-left: 6px;
  text-transform: uppercase;
}
.pub-status.published  { background: #e6f4ea; color: #1e6e34; }
.pub-status.forthcoming { background: #fff3e0; color: #b45309; }
.pub-status.preprint   { background: #f0eafb; color: #6d28d9; }
.pub-status.revision   { background: #fef3c7; color: #92400e; }

/* ==========================================================
   Responsive
   ========================================================== */

@media (max-width: 820px) {
  .hamburger { display: flex; }

  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0; right: 0;
    background: var(--nav-bg);
    flex-direction: column;
    align-items: stretch;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
    display: none;
    padding-bottom: 16px;
    box-shadow: 0 8px 32px rgba(0,0,0,.45);
  }

  .nav-menu.open { display: flex; }

  .nav-menu > li > .nav-link {
    height: auto;
    padding: 14px 22px;
    border-bottom: 1px solid rgba(255,255,255,.07);
  }

  .dropdown {
    position: static;
    box-shadow: none;
    background: rgba(0,0,0,.3);
    min-width: 0;
    border-radius: 0;
    border-top: none;
    border-left: 3px solid var(--accent);
  }

  .has-dropdown:hover > .dropdown { display: none; }
  .has-dropdown.open  > .dropdown { display: block; }

  .dropdown li a { padding-left: 34px; }

  /* Hero responsive */
  .hero { padding: 48px 20px 44px; }
  .hero-inner { flex-direction: column; gap: 32px; text-align: center; }
  .hero-photo { display: flex; justify-content: center; }
  .profile-img { width: 170px; height: 170px; }
  .hero-name { font-size: 2rem; }
  .hero-badges { justify-content: center; }
  .quick-links { justify-content: center; }

  .page-section { padding: 36px 20px 60px; }
}

@media (max-width: 480px) {
  .hero-name { font-size: 1.7rem; }
  .ql-btn { font-size: .82rem; padding: 7px 14px; }
}