/* ============================================
   Angela Develin — Editorial Science
   Palette: Deep charcoal + emerald greens
   ============================================ */

:root {
  --bg-primary: #111113;
  --bg-secondary: #191b1f;
  --bg-card: #1e2126;
  --bg-card-hover: #252930;

  --emerald: #3db88c;
  --emerald-bright: #4ecda0;
  --emerald-dim: #2a7d60;
  --emerald-tint: rgba(61, 184, 140, 0.08);
  --emerald-glow: rgba(61, 184, 140, 0.15);

  --text-primary: #f0ece6;
  --text-secondary: #a8a4a0;
  --text-muted: #6b6763;

  --navy-accent: #1e2d3d;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'DM Sans', sans-serif;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1080px;
}

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

html {
  scroll-behavior: auto;
  font-size: 16px;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-secondary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--emerald);
  text-decoration: none;
  transition: var(--transition);
}

a:hover { color: var(--emerald-bright); }

strong { color: var(--text-primary); font-weight: 500; }

/* ---- NAV ---- */

nav {
  position: fixed;
  top: 0;
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 48px;
  z-index: 100;
  background: rgba(17, 17, 19, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(61, 184, 140, 0.06);
}

.nav-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.02em;
}

.nav-name:hover { color: var(--emerald); }

.nav-links {
  display: flex;
  gap: 32px;
}

.nav-links a {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

.nav-links a:hover { color: var(--emerald); }

/* ---- HERO ---- */

.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 60px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 140px 48px 100px;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--emerald);
  margin-bottom: 24px;
}

.hero h1 {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.05;
  margin-bottom: 28px;
}

.accent { color: var(--emerald); }

.hero-description {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 500px;
  margin-bottom: 40px;
  line-height: 1.8;
}

.image-frame {
  position: relative;
  width: 100%;
  max-width: 360px;
  margin-left: auto;
}

.image-frame::before {
  content: '';
  position: absolute;
  top: -12px;
  right: -12px;
  width: 100%;
  height: 100%;
  border: 2px solid var(--emerald-dim);
  border-radius: 6px;
  transition: var(--transition);
}

.image-frame:hover::before {
  top: -8px;
  right: -8px;
}

.image-frame img {
  width: 100%;
  border-radius: 6px;
  display: block;
  position: relative;
  z-index: 1;
  filter: saturate(0.9);
  transition: var(--transition);
}

.image-frame:hover img {
  filter: saturate(1);
}

/* ---- BUTTON ---- */

.btn {
  display: inline-block;
  padding: 14px 36px;
  border: 1.5px solid var(--emerald);
  color: var(--emerald);
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 4px;
  transition: var(--transition);
  background: transparent;
}

.btn:hover {
  background: var(--emerald-tint);
  color: var(--emerald-bright);
  transform: translateY(-2px);
  box-shadow: 0 4px 20px rgba(61, 184, 140, 0.15);
}

/* ---- SECTIONS ---- */

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 48px;
}

.section-alt {
  background: var(--bg-secondary);
  max-width: 100%;
  padding-left: calc((100% - var(--max-width)) / 2 + 48px);
  padding-right: calc((100% - var(--max-width)) / 2 + 48px);
}

.section-heading {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  color: var(--text-primary);
  margin-bottom: 48px;
  display: flex;
  align-items: center;
  gap: 16px;
}

.section-heading::after {
  content: '';
  flex: 1;
  height: 1px;
  background: linear-gradient(to right, var(--emerald-dim), transparent);
  max-width: 300px;
}

.heading-number {
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--emerald);
  letter-spacing: 0.05em;
}

/* ---- ABOUT ---- */

.about-content {
  max-width: 680px;
}

.about-content p {
  margin-bottom: 20px;
  font-size: 1.05rem;
}

/* ---- SKILL TAGS ---- */

.skill-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 32px;
}

.skill-tag {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--emerald-dim);
  color: var(--emerald);
  background: var(--emerald-tint);
  transition: var(--transition);
  white-space: nowrap;
}

.skill-tag:hover {
  background: var(--emerald-glow);
  border-color: var(--emerald);
}

/* ---- TIMELINE ---- */

.timeline {
  position: relative;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 7px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--emerald-dim), var(--bg-card));
}

.timeline-item {
  position: relative;
  margin-bottom: 48px;
}

.timeline-item:last-child { margin-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -40px;
  top: 8px;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  border: 2px solid var(--emerald-dim);
  background: var(--bg-primary);
  z-index: 1;
  transition: var(--transition);
}

.timeline-item:hover .timeline-marker {
  background: var(--emerald);
  border-color: var(--emerald);
  box-shadow: 0 0 12px var(--emerald-glow);
}

.timeline-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 8px;
}

.timeline-date {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--emerald);
  letter-spacing: 0.02em;
}

.timeline-location {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.timeline-company {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.timeline-content p:last-child {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ---- EDUCATION ---- */

.education-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.education-card {
  background: var(--bg-card);
  border-radius: 6px;
  padding: 36px;
  transition: var(--transition);
  border: 1px solid transparent;
}

.education-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--emerald-dim);
  transform: translateY(-4px);
}

.education-degree {
  font-family: var(--font-display);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--emerald);
  line-height: 1;
  margin-bottom: 12px;
}

.education-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.education-school {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.education-year {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ---- RESEARCH ---- */

.research-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.research-card {
  background: var(--bg-card);
  border-radius: 6px;
  padding: 36px 28px;
  transition: var(--transition);
  border: 1px solid transparent;
}

.research-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--emerald-dim);
  transform: translateY(-4px);
}

.research-icon {
  font-size: 1.8rem;
  color: var(--emerald);
  margin-bottom: 20px;
}

.research-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.research-card p {
  font-size: 0.9rem;
  line-height: 1.7;
}

/* ---- PUBLICATIONS ---- */

.publications-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.publication-item {
  display: grid;
  grid-template-columns: 120px 1fr 32px;
  align-items: center;
  gap: 24px;
  padding: 24px 20px;
  border-radius: 4px;
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid transparent;
}

.publication-item:hover {
  background: var(--bg-card);
  border-color: var(--emerald-dim);
}

.pub-journal {
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--emerald);
}

.publication-item h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 400;
  color: var(--text-primary);
  line-height: 1.5;
  transition: var(--transition);
}

.publication-item:hover h3 {
  color: var(--emerald-bright);
}

.pub-arrow {
  font-size: 1.1rem;
  color: var(--text-muted);
  transition: var(--transition);
  justify-self: end;
}

.publication-item:hover .pub-arrow {
  color: var(--emerald);
  transform: translate(2px, -2px);
}

@media (max-width: 640px) {
  .publication-item {
    grid-template-columns: 1fr 24px;
    gap: 8px;
  }

  .pub-journal {
    grid-column: 1 / -1;
  }
}

/* ---- VOLUNTEERING ---- */

.volunteering-content {
  max-width: 680px;
}

.volunteering-content h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.volunteering-org {
  font-size: 0.85rem;
  color: var(--emerald);
  margin-bottom: 16px;
}

.volunteering-content p:last-child {
  font-size: 0.95rem;
}

/* ---- CONTACT ---- */

.section-contact {
  text-align: center;
  padding: 120px 48px;
}

.contact-eyebrow {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--emerald);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.section-contact h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--text-primary);
  margin-bottom: 16px;
}

.section-contact p {
  font-size: 1.05rem;
  max-width: 500px;
  margin: 0 auto 36px;
}

/* ---- FOOTER ---- */

footer {
  text-align: center;
  padding: 32px 48px;
  border-top: 1px solid rgba(61, 184, 140, 0.06);
}

footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 120px;
  }

  .hero-image { order: -1; }

  .image-frame {
    max-width: 260px;
    margin: 0 auto;
  }

  .research-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  nav { padding: 16px 24px; }
  .nav-links { gap: 20px; }
  .nav-links a { font-size: 0.7rem; }

  .hero { padding: 100px 24px 60px; gap: 40px; }
  .section { padding: 60px 24px; }
  .section-alt {
    padding-left: 24px;
    padding-right: 24px;
  }
  .section-contact { padding: 80px 24px; }

  .education-grid { grid-template-columns: 1fr; }

  .image-frame { max-width: 200px; }

  .hero h1 { font-size: 2.8rem; }
}

@media (max-width: 480px) {
  .nav-links { display: none; }
  .hero h1 { font-size: 2.2rem; }
}