/* ============================================================
   Giorgio Roffo — Academic Portfolio  |  style.css
   ============================================================ */

/* ── Custom properties ── */
:root {
  --navy:       #0f2340;
  --navy-med:   #1d3a5e;
  --blue:       #2563eb;
  --blue-light: #3b82f6;
  --text:       #1e293b;
  --text-muted: #64748b;
  --border:     #e2e8f0;
  --bg:         #ffffff;
  --bg-alt:     #f8fafc;
  --tag-bg:     #dbeafe;
  --tag-text:   #1e40af;
  --shadow:     0 1px 3px rgba(0,0,0,.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,.12);
  --radius:     8px;
  --max:        940px;
  --ease:       0.2s ease;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html   { scroll-behavior: smooth; font-size: 16px; }
img    { max-width: 100%; height: auto; display: block; }
ul     { list-style: none; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
               "Helvetica Neue", Arial, "Noto Sans", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--blue); text-decoration: none; transition: color var(--ease); }
a:hover { color: var(--navy-med); text-decoration: underline; }

/* ── Layout ── */
.container { max-width: var(--max); margin: 0 auto; padding: 0 1.5rem; }
.section    { padding: 4rem 0; }
.section-alt { background: var(--bg-alt); }

.section-title {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 2rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
  flex-wrap: wrap;
}
.section-title-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--blue);
}

/* ── Navigation ── */
#navbar {
  position: sticky;
  top: 0;
  z-index: 200;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(0,0,0,.04);
}
.nav-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: 60px;
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-logo {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--navy);
  white-space: nowrap;
  text-decoration: none !important;
  letter-spacing: -0.01em;
}
.nav-logo:hover { color: var(--blue); }

.nav-menu { display: flex; gap: 1.4rem; flex: 1; }
.nav-menu a {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 500;
  text-decoration: none;
  padding: 0.2rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--ease), border-color var(--ease);
}
.nav-menu a:hover,
.nav-menu a.active { color: var(--navy); border-bottom-color: var(--blue); text-decoration: none; }

.btn-nav-cv {
  background: var(--blue);
  color: #fff !important;
  padding: 0.35rem 0.9rem;
  border-radius: 5px;
  font-size: 0.82rem;
  font-weight: 600;
  white-space: nowrap;
  text-decoration: none !important;
  transition: background var(--ease);
}
.btn-nav-cv:hover { background: var(--navy-med); text-decoration: none !important; }

#nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  color: var(--text);
  padding: 0.25rem;
  margin-left: auto;
}

/* ── Hero ── */
.section-hero {
  padding: 3.5rem 0 3rem;
  background: linear-gradient(135deg, #eef4ff 0%, var(--bg) 55%);
}
.hero-layout {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 2.5rem;
  align-items: start;
}

/* Photo sidebar */
.hero-photo-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.1rem;
}
.avatar-wrap { width: 150px; height: 150px; position: relative; }
.avatar {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--blue);
  box-shadow: var(--shadow-md);
}
.avatar-fallback {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: var(--navy);
  color: #fff;
  font-size: 2.4rem;
  font-weight: 700;
  display: none;
  align-items: center;
  justify-content: center;
  border: 3px solid var(--blue);
  box-shadow: var(--shadow-md);
}
.sidebar-info {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.sidebar-item {
  font-size: 0.83rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}
.sidebar-item i { color: var(--blue); width: 14px; flex-shrink: 0; }
.sidebar-item a { color: var(--text-muted); }
.sidebar-item a:hover { color: var(--blue); text-decoration: none; }

.social-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: center;
}
.social-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 33px;
  height: 33px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.9rem;
  text-decoration: none;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}
.social-icon:hover {
  background: var(--blue);
  color: #fff;
  border-color: var(--blue);
  text-decoration: none;
}
.social-icon-emoji {
  font-size: 1rem;
  line-height: 1;
}

/* Hero text */
.hero-name {
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--navy);
  line-height: 1.15;
  display: inline;
  letter-spacing: -0.02em;
}
.hero-degree {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-left: 0.3rem;
}
.hero-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-top: 0.3rem;
}
.hero-org {
  font-size: 0.97rem;
  color: var(--text-muted);
  margin-top: 0.1rem;
}
.hero-stats {
  display: flex;
  gap: 0;
  flex-wrap: wrap;
  margin-top: 1.25rem;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.75rem 1rem;
  border-right: 1px solid var(--border);
}
.stat-item:last-child { border-right: none; }
.stat-num   { font-size: 1.05rem; font-weight: 800; color: var(--navy); }
.stat-label { font-size: 0.72rem; color: var(--text-muted); margin-top: 0.1rem; }

.hero-bio {
  font-size: 0.96rem;
  color: var(--text);
  line-height: 1.72;
  margin-top: 1.2rem;
}
.hero-bio + .hero-bio { margin-top: 0.75rem; }

.research-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 1.2rem;
}
.tag {
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 4px;
  padding: 0.2rem 0.55rem;
  font-size: 0.78rem;
  font-weight: 600;
}

/* ── Timeline ── */
.timeline {
  padding-left: 2.2rem;
  position: relative;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 1.25rem;
  padding-bottom: 1.75rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.6rem;
  top: 0.35rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--blue);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--blue);
}
.timeline-edu::before {
  background: var(--bg-alt);
  box-shadow: 0 0 0 2px var(--border);
}
.timeline-date {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  padding-top: 0.15rem;
  white-space: nowrap;
}
.timeline-role {
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.15rem;
}
.timeline-org {
  font-size: 0.87rem;
  font-weight: 500;
  color: var(--blue);
  margin-bottom: 0.35rem;
}
.timeline-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
}
.timeline-bullets {
  margin-top: 0.55rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}
.timeline-bullets li {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.6;
  padding-left: 1rem;
  position: relative;
}
.timeline-bullets li::before {
  content: '\2022';
  color: var(--blue);
  font-weight: 800;
  position: absolute;
  left: 0;
}
.timeline-bullets strong { color: var(--text); }

.section-subtitle {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.9rem;
}

/* ── News ── */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 750px;
}
.news-list li {
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.92rem;
  line-height: 1.6;
}
.news-list li:last-child { border-bottom: none; }
.news-date {
  flex: 0 0 5.5rem;
  text-align: right;
  font-size: 0.76rem;
  font-weight: 700;
  color: var(--blue);
  padding-top: 0.15rem;
  white-space: nowrap;
  letter-spacing: 0.02em;
}
.news-text {
  flex: 1;
  color: var(--text);
}
.news-text em { color: var(--navy); }
.news-text a {
  font-weight: 600;
  margin-left: 0.2rem;
}

/* ── Publications ── */
.pub-list { display: flex; flex-direction: column; }
.pub-item {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--border);
}
.pub-item:last-child { border-bottom: none; }
.pub-title {
  font-size: 0.99rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.2rem;
  line-height: 1.4;
}
.pub-authors {
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 0.1rem;
}
.pub-venue {
  font-size: 0.86rem;
  color: var(--text);
  font-style: italic;
  margin-bottom: 0.5rem;
}
.pub-links   { display: flex; gap: 0.4rem; flex-wrap: wrap; }
.pub-link {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--blue);
  border: 1.5px solid var(--blue);
  border-radius: 4px;
  padding: 0.1rem 0.55rem;
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}
.pub-link:hover { background: var(--blue); color: #fff; text-decoration: none; }
.pub-see-more { margin-top: 1.5rem; font-size: 0.94rem; }

/* Publications page extras */
.pub-year-heading {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--navy);
  margin: 2.5rem 0 0.5rem;
  padding-bottom: 0.4rem;
  border-bottom: 2px solid var(--blue);
}
.pub-year-heading:first-child { margin-top: 0; }
.pub-back-link {
  display: inline-block;
  margin-bottom: 2rem;
  font-size: 0.9rem;
}

/* ── Current-status note ── */
.hero-note {
  margin-top: 1rem;
  padding: 0.65rem 1rem;
  background: #fef3c7;
  border-left: 3px solid #f59e0b;
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.87rem;
  color: #92400e;
  font-weight: 500;
}

/* ── Research Focus cards ── */
.focus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 1.2rem;
}
.focus-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.2rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--ease), transform var(--ease);
}
.focus-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.focus-icon {
  font-size: 1.6rem;
  margin-bottom: 0.7rem;
  display: block;
}
.focus-card h3 {
  font-size: 0.92rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.4rem;
  line-height: 1.3;
}
.focus-card p {
  font-size: 0.83rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* ── Awards ── */
.awards-list {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}
.awards-list li {
  font-size: 0.92rem;
  line-height: 1.55;
  display: flex;
  gap: 0.6rem;
  align-items: baseline;
}
.award-year {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue);
  min-width: 40px;
  flex-shrink: 0;
}

/* ── Teaching / Mentorship ── */
.teaching-list {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}
.teaching-list li {
  font-size: 0.92rem;
  line-height: 1.55;
  padding-left: 1.1rem;
  position: relative;
}
.teaching-list li::before {
  content: '\2022';
  color: var(--blue);
  font-weight: 800;
  position: absolute;
  left: 0;
}

/* ── Collaborations ── */
.collabs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}
.collab-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.15rem;
  box-shadow: var(--shadow);
}
.collab-card h3 {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.2rem;
}
.collab-card p {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ── Projects ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(265px, 1fr));
  gap: 1.2rem;
}
.project-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.2rem;
  box-shadow: var(--shadow);
  transition: box-shadow var(--ease), transform var(--ease);
  display: flex;
  flex-direction: column;
}
.project-card:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.project-card-header {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.6rem;
}
.project-icon { color: var(--text-muted); font-size: 0.95rem; }
.project-name {
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--navy);
  flex: 1;
  text-decoration: none;
  word-break: break-word;
  line-height: 1.3;
}
.project-name:hover { color: var(--blue); text-decoration: none; }
.project-stars { font-size: 0.78rem; color: var(--text-muted); white-space: nowrap; }
.project-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.55;
  flex: 1;
  margin-bottom: 0.8rem;
}
.project-tags { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.ptag {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 0.05rem 0.4rem;
}

/* ── Footer ── */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,.65);
  padding: 3rem 0 1.75rem;
}
.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.footer-name  { font-size: 1.05rem; font-weight: 700; color: #fff; margin-bottom: 0.2rem; }
.footer-role  { font-size: 0.88rem; margin-bottom: 0.4rem; }
.site-footer a { color: rgba(255,255,255,.6); }
.site-footer a:hover { color: #fff; text-decoration: none; }
.footer-links { display: flex; gap: 0.85rem; align-items: center; flex-wrap: wrap; }
.footer-links a { font-size: 0.87rem; }
.footer-copy {
  font-size: 0.78rem;
  text-align: center;
  color: rgba(255,255,255,.35);
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 1.5rem;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
  .hero-photo-col {
    flex-direction: row;
    align-items: flex-start;
    flex-wrap: wrap;
  }
  .avatar-wrap     { width: 90px; height: 90px; }
  .avatar,
  .avatar-fallback { width: 90px; height: 90px; font-size: 1.8rem; }

  #nav-toggle { display: block; }
  .nav-menu {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    gap: 0.75rem;
    box-shadow: var(--shadow-md);
  }
  .nav-menu.open { display: flex; }
  .btn-nav-cv { display: none; }

  .timeline-item  { grid-template-columns: 1fr; gap: 0.25rem; }
  .timeline-date  { padding-top: 0; }

  .hero-stats  { flex-direction: row; overflow-x: auto; }
  .stat-item   { flex-shrink: 0; }

  .footer-content { flex-direction: column; }
  .section        { padding: 2.5rem 0; }
  .hero-name      { font-size: 1.75rem; }
}

@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .section-title  { font-size: 1.3rem; }
  .hero-stats     { gap: 0; }
}