/* ─────────────────────────────────────────
   components.css — nav, buttons, tags, cards
   ───────────────────────────────────────── */

/* ─── NAV ─── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 60px;
  border-bottom: 1px solid transparent;
  transition: all 0.4s ease;
}

nav.scrolled {
  background: rgba(8, 12, 16, 0.88);
  border-bottom-color: var(--border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav-logo {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  text-decoration: none;
}

.nav-links {
  display: flex;
  gap: 36px;
  list-style: none;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: color 0.25s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s ease;
}

.nav-links a:hover { color: var(--accent); }
.nav-links a:hover::after { width: 100%; }

.nav-mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-mobile-toggle span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--muted);
  transition: all 0.3s;
}

/* ─── BUTTONS ─── */
.btn {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 13px 28px;
  border-radius: 3px;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  display: inline-block;
  border: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg);
  border: 1px solid var(--accent);
}

.btn-primary:hover {
  background: transparent;
  color: var(--accent);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--dim);
}

.btn-outline:hover {
  border-color: var(--text);
  color: var(--text);
}

/* ─── TAGS ─── */
.tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 2px;
  color: var(--muted);
  letter-spacing: 0.05em;
  transition: all 0.25s;
  cursor: default;
}

.tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 255, 0.06);
}

/* ─── NEWS BADGES ─── */
.news-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  padding: 2px 8px;
  border-radius: 2px;
  margin-right: 8px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.badge-paper  { background: rgba(123,97,255,0.15); color: var(--accent2); border: 1px solid rgba(123,97,255,0.3); }
.badge-award  { background: rgba(240,192,96,0.10); color: var(--gold);    border: 1px solid rgba(240,192,96,0.3); }
.badge-talk   { background: rgba(0,212,255,0.08);  color: var(--accent);  border: 1px solid rgba(0,212,255,0.25); }
.badge-conference { 
  background: rgba(16,185,129,0.12);   /* green */
  color: #10b981; 
  border: 1px solid rgba(16,185,129,0.35); 
}
.badge-news { 
  background: rgba(59,130,246,0.10);   /* blue */
  color: #3b82f6; 
  border: 1px solid rgba(59,130,246,0.30); 
}
.badge-milestone { 
  background: rgba(234,88,12,0.12);    /* orange */
  color: #ea580c; 
  border: 1px solid rgba(234,88,12,0.35); 
}

/* ─── SIDEBAR BLOCKS ─── */
.sidebar-block {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
  margin-bottom: 20px;
}

.sidebar-title {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--muted);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  margin-bottom: 16px;
}

/* ─── INTEREST LIST ─── */
.interest-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 0;
  font-size: 0.88rem;
  color: #94a3b8;
  border-bottom: 1px solid var(--border);
}

.interest-item:last-child { border-bottom: none; }

.interest-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ─── CONTACT INFO ─── */
.contact-info {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 2;
}

.contact-info .highlight { color: var(--text); }

/* ─── SOCIAL LINKS ─── */
.social-links {
  display: flex;
  gap: 10px;
}

.social-link {
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  text-decoration: none;
  transition: all 0.25s;
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 255, 0.08);
}

/* ─── PUB LINKS ─── */
.pub-link {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 4px 12px;
  border: 1px solid var(--dim);
  border-radius: 2px;
  color: var(--muted);
  text-decoration: none;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: all 0.2s;
}

.pub-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ─── FILTER BUTTONS ─── */
.filter-btn {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  padding: 6px 16px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  border-radius: 2px;
  cursor: pointer;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: all 0.2s;
}

.filter-btn.active,
.filter-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(0, 212, 255, 0.06);
}

/* ─── RESPONSIVE NAV ─── */
@media (max-width: 900px) {
  nav { padding: 18px 24px; }
  .nav-links { gap: 20px; }
  .nav-mobile-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: rgba(8,12,16,0.96);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 20px 0;
    transform: translateY(-110%);
    transition: transform 0.35s ease;
    backdrop-filter: blur(18px);
  }

  .nav-links.open {
    transform: translateY(0);
  }

  .nav-links li { width: 100%; text-align: center; }
  .nav-links a  { display: block; padding: 14px 0; }
}