/* ============================================================
   THEME B — "Deep Sequence"
   Dark navy · cyan-green accents · Space Mono labels
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&display=swap');

:root {
  --bg:             #0D1117;
  --bg-secondary:   #161B22;
  --bg-tertiary:    #21262D;
  --text:           #E6EDF3;
  --text-secondary: #8B949E;
  --text-muted:     #484F58;
  --accent:         #3FB950;
  --accent-dark:    #238636;
  --accent-light:   #0D2119;
  --accent-border:  #1A4B22;
  --border:         #21262D;
  --border-dark:    #30363D;
  --personal:       #58A6FF;
  --personal-dark:  #1F6FEB;
  --personal-light: #0D2457;
  --shadow-sm:      0 1px 3px rgba(0,0,0,0.5);
  --shadow:         0 4px 20px rgba(0,0,0,0.6);
  --shadow-lg:      0 8px 40px rgba(0,0,0,0.7);
}

/* --- Monospace labels --- */
.section__label,
.research-card__num,
.hero__eyebrow,
.recent-pub__year,
.team-card__role,
.theme-peek__num,
.page-header__eyebrow {
  font-family: 'Space Mono', monospace;
  letter-spacing: 0.05em;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  background: rgba(13, 17, 23, 0.9);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.nav.scrolled {
  border-bottom-color: var(--border-dark);
  box-shadow: 0 1px 0 rgba(63,185,80,0.08);
}

.nav__logo-name { color: var(--text); }
.nav__logo-sub  { color: var(--text-muted); }

.nav__link { color: var(--text-secondary); }
.nav__link:hover { color: var(--text); background: rgba(63,185,80,0.08); }
.nav__link.active { color: var(--accent); background: rgba(63,185,80,0.1); }

.nav__toggle span { background: var(--text-secondary); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: var(--bg);
  min-height: 100vh;
  padding-top: var(--nav-height);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
}

/* Subtle grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(63, 185, 80, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(63, 185, 80, 0.07) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

/* Central green glow */
.hero::after {
  content: '';
  position: absolute;
  top: 30%;
  left: 30%;
  width: 700px;
  height: 500px;
  transform: translate(-50%, -50%);
  background: radial-gradient(ellipse at center, rgba(63, 185, 80, 0.1) 0%, transparent 65%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 80px 24px;
}

/* Hero logo + title layout */
.hero__main {
  display: flex;
  align-items: center;
  gap: 64px;
}

.hero__logo-wrap {
  flex-shrink: 0;
}

.hero__logo-large {
  width: 260px;
  height: auto;
  filter: brightness(0) invert(1)
          drop-shadow(0 0 18px rgba(63, 185, 80, 0.45))
          drop-shadow(0 0 48px rgba(63, 185, 80, 0.2));
  animation: logoPulse 4s ease-in-out infinite;
}

@keyframes logoPulse {
  0%, 100% { filter: brightness(0) invert(1) drop-shadow(0 0 18px rgba(63,185,80,0.45)) drop-shadow(0 0 48px rgba(63,185,80,0.2)); }
  50%       { filter: brightness(0) invert(1) drop-shadow(0 0 28px rgba(63,185,80,0.7)) drop-shadow(0 0 64px rgba(63,185,80,0.35)); }
}

.hero__text { flex: 1; }

@media (max-width: 780px) {
  .hero__main { flex-direction: column; gap: 36px; text-align: center; }
  .hero__logo-large { width: 180px; }
  .hero__eyebrow::before { display: none; }
}

.hero__eyebrow { color: var(--accent); }
.hero__eyebrow::before { background: var(--accent); }

.hero__title { color: var(--text); }
.hero__title em { color: var(--accent); font-style: normal; }

.hero__description { color: var(--text-secondary); }

/* ============================================================
   BUTTONS
   ============================================================ */
.btn--primary {
  background: var(--accent);
  color: #0D1117;
  border-color: var(--accent);
  font-weight: 700;
}

.btn--primary:hover {
  background: #52D068;
  border-color: #52D068;
  box-shadow: 0 4px 16px rgba(63, 185, 80, 0.35);
  transform: translateY(-1px);
}

.btn--outline {
  border-color: var(--border-dark);
  color: var(--text-secondary);
  background: transparent;
}

.btn--outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(63,185,80,0.06);
  transform: translateY(-1px);
}

/* ============================================================
   THEME PEEK CARDS (no images — gradient backgrounds)
   ============================================================ */
.theme-peek {
  background: linear-gradient(160deg, #161B22 0%, #0D1117 100%);
  border: 1px solid var(--border);
}

.theme-peek:hover,
.theme-peek[aria-expanded="true"] {
  border-color: var(--accent-border);
  box-shadow: 0 0 24px rgba(63,185,80,0.12), 0 4px 20px rgba(0,0,0,0.5);
}

.theme-peek__img { display: none; }

.theme-peek__overlay {
  background: linear-gradient(to top, rgba(13,17,23,0.98) 0%, rgba(13,17,23,0.6) 55%, rgba(13,17,23,0.2) 100%);
}

.theme-peek__num  { color: var(--accent); }
.theme-peek__title { color: var(--text); }
.theme-peek__text  { color: var(--text-secondary); }

/* ============================================================
   SECTIONS
   ============================================================ */
.section--alt { background: var(--bg-secondary); }

.section__title { color: var(--text); }
.section__subtitle { color: var(--text-secondary); }

.section__title-link {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s;
}

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

/* ============================================================
   THEME SCROLL STRIP
   ============================================================ */
.theme-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  padding: 32px 40px 40px;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.theme-scroll::-webkit-scrollbar { display: none; }

.theme-scroll__card {
  flex: 0 0 320px;
  scroll-snap-align: start;
  text-decoration: none;
  display: block;
}

.theme-scroll__image {
  width: 100%;
  height: auto;
  border-radius: 8px;
  display: block;
  margin-bottom: 16px;
  transition: opacity 0.2s;
}

.theme-scroll__card:hover .theme-scroll__image { opacity: 0.85; }

.theme-scroll__title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
  line-height: 1.4;
}

/* ============================================================
   PUBLICATIONS
   ============================================================ */
.recent-pub { border-color: var(--border); }
.recent-pub:hover { border-color: var(--accent-border); }
.recent-pub__year { color: var(--accent); font-family: 'Space Mono', monospace; }
.recent-pub__authors { color: var(--text-muted); }
.recent-pub__title a { color: var(--text); }
.recent-pub__title a:hover { color: var(--accent); }
.recent-pub__journal { color: var(--text-muted); }

.pub-item__authors,
.pub-item__authors * { color: #ffffff !important; }

.research-theme__text { color: #ffffff !important; }
.research-theme__text a { color: #ffffff !important; text-decoration: underline; text-underline-offset: 3px; }
.research-theme__text a:hover { color: var(--accent) !important; }
.pub-item__authors strong { font-weight: 700; }
.pub-item__title { color: #E6EDF3; }
.pub-item__title a { color: #E6EDF3; }
.pub-item__title a:hover { color: var(--accent); }
.pub-item__meta,
.pub-item__meta * { color: #ffffff !important; }
.pub-year-label { color: var(--accent); }
.pub-key { color: #8B949E; }

.pub-filter {
  background: var(--bg-secondary);
  border-color: var(--border);
  color: var(--text-secondary);
}
.pub-filter:hover { border-color: var(--accent); color: var(--accent); }
.pub-filter.active { background: var(--accent); border-color: var(--accent); color: #0D1117; }

.pub-year-label { color: var(--text-muted); border-color: var(--border); }
.pub-item { border-color: var(--border); }
.pub-item__authors { color: var(--text-muted); }
.pub-item__title a { color: var(--text); }
.pub-item__journal { color: var(--text-muted); }
.pub-badge { background: var(--bg-tertiary); color: var(--text-secondary); border-color: var(--border); }

/* ============================================================
   TEAM
   ============================================================ */
.team-card { background: var(--bg-secondary); border-color: var(--border); }
.team-card:hover { border-color: var(--accent-border); box-shadow: 0 0 20px rgba(63,185,80,0.08); }
.team-card--pi { background: var(--accent-light); border-color: var(--accent-border); }
.team-card__name { color: var(--text); }
.team-card__bio  { color: var(--text-secondary); }
.team-card__research { color: var(--text-secondary); }
.team-card__interests { color: var(--text-muted); }
.team-card__contact { color: var(--accent); }
.team-avatar { background: var(--bg-tertiary); color: var(--text-muted); }

/* ============================================================
   FUNDING
   ============================================================ */
.funding-strip {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.funding-strip__label { color: var(--text-muted); }
.funding-logo img { opacity: 0.75; }
.funding-logo:hover img { opacity: 1; }

/* ============================================================
   ALUMNI
   ============================================================ */
.alumni-section { border-color: var(--border); }
.alumni-title { color: var(--text); }
.alumni-tag { background: var(--bg-tertiary); color: var(--text-secondary); border-color: var(--border-dark); }

/* ============================================================
   PAGE HEADERS (inner pages)
   ============================================================ */
.page-header { background: var(--bg-secondary); border-bottom: 1px solid var(--border); }
.page-header__eyebrow { color: var(--accent); }
.page-header__title { color: var(--text); }
.page-header__description { color: var(--text-secondary); }

/* ============================================================
   CONTACT
   ============================================================ */
.contact-info-card { background: var(--bg-secondary); border-color: var(--border); }
.contact-info-card h3 { color: var(--text); }
.contact-form { background: var(--bg-secondary); border-color: var(--border); }
.form-group label { color: var(--text-secondary); }
.form-group input,
.form-group textarea,
.form-group select {
  background: var(--bg-tertiary);
  border-color: var(--border-dark);
  color: var(--text);
}
.form-group input:focus,
.form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(63,185,80,0.15); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: #010409;
  border-top: 1px solid var(--border);
}
.footer__brand-name { color: var(--text-secondary); }
.footer__address    { color: var(--text-muted); }
.footer__link       { color: var(--text-muted); }
.footer__link:hover { color: var(--accent); }