/* ============================================
   Kristopher Velasco — Academic Portfolio
   Clean White + Indigo theme
   ============================================ */

/* --- Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* --- CSS Variables --- */
:root {
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-card: #f8fafc;
  --bg-card-hover: #f1f5f9;
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --text-muted: #94a3b8;
  --accent: #4f46e5;
  --accent-light: #4f46e5;
  --accent-glow: rgba(79, 70, 229, 0.08);
  --award: #d97706;
  --award-bg: rgba(217, 119, 6, 0.08);
  --border: #e2e8f0;
  --border-light: #cbd5e1;
  --link: #4f46e5;
  --link-hover: #4338ca;
  --tag-bg: rgba(79, 70, 229, 0.08);
  --tag-text: #4f46e5;
  --data-bg: rgba(5, 150, 105, 0.08);
  --data-text: #059669;
  --data-border: rgba(5, 150, 105, 0.2);
  --mono: 'JetBrains Mono', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --max-width: 1100px;
  --nav-height: 64px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 2rem);
}

body {
  font-family: var(--sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a:hover {
  color: var(--link-hover);
}

/* --- Navigation --- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nav-inner {
  width: 100%;
  max-width: var(--max-width);
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

.nav-brand span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 450;
  padding: 0.5rem 0.875rem;
  border-radius: 6px;
  transition: all var(--transition);
}

.nav-links a:hover {
  color: var(--text-primary);
  background: var(--bg-secondary);
}

.nav-links a.active {
  color: var(--accent);
  background: var(--accent-glow);
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s ease;
}

/* --- Layout --- */
.page {
  padding-top: var(--nav-height);
  min-height: 100vh;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 3rem 2rem;
}

/* --- Hero (Home Page) --- */
.hero {
  padding: 5rem 0 3rem;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-text h1 {
  font-size: 2.75rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.hero-text h1 span {
  color: var(--accent);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  font-weight: 400;
}

.hero-affiliation {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.hero-affiliation::before {
  content: '';
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-bio {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  max-width: 540px;
}

.hero-photo {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-photo img {
  width: 320px;
  height: 320px;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--border);
}

.photo-placeholder {
  width: 320px;
  height: 320px;
  border-radius: 16px;
  border: 2px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--mono);
  background: var(--bg-secondary);
}

/* --- Research Interests Tags --- */
.interests {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.tag {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  background: var(--tag-bg);
  color: var(--tag-text);
  border-radius: 20px;
  border: 1px solid rgba(79, 70, 229, 0.15);
}

/* --- Section Headers --- */
.section-header {
  margin-bottom: 2.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.section-header h1 {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.section-header p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.section-header .count {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--accent);
}

/* --- Publication Entry --- */
.pub-section-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 2.5rem 0 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.pub-section-title .icon {
  font-size: 1.2rem;
  color: var(--accent);
}

.pub-list {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.pub-entry {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 1.5rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 0.75rem;
  transition: all var(--transition);
}

.pub-entry:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateX(4px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.pub-year {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 0.15rem;
  white-space: nowrap;
}

.pub-content h3 {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 0.3rem;
  color: var(--text-primary);
}

.pub-authors {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
}

.pub-authors strong {
  color: var(--accent);
  font-weight: 600;
}

.pub-venue {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.6rem;
}

.pub-link {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  background: var(--tag-bg);
  color: var(--accent);
  border-radius: 4px;
  border: 1px solid rgba(79, 70, 229, 0.15);
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

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

.pub-link.data-link {
  background: var(--data-bg);
  color: var(--data-text);
  border-color: var(--data-border);
}

.pub-link.data-link:hover {
  background: #059669;
  border-color: #059669;
  color: #fff;
}

/* --- Awards Badge --- */
.award-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  background: var(--award-bg);
  color: var(--award);
  border-radius: 4px;
  border: 1px solid rgba(217, 119, 6, 0.2);
  margin-top: 0.5rem;
}

/* --- Datasets Page --- */
.dataset-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.dataset-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.75rem;
  transition: all var(--transition);
}

.dataset-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.dataset-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.dataset-card .dataset-authors {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
}

.dataset-card .dataset-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
  line-height: 1.6;
}

.dataset-card .dataset-status {
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 0.75rem;
}

.status-available {
  background: var(--data-bg);
  color: var(--data-text);
  border: 1px solid var(--data-border);
}

.status-progress {
  background: var(--award-bg);
  color: var(--award);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.dataset-links {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* --- Quick Links / Stats Row --- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 3rem 0;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  transition: all var(--transition);
}

.stat-card:hover {
  border-color: var(--accent);
  background: var(--accent-glow);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.08);
}

.stat-number {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* --- Footer --- */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.8rem;
  font-family: var(--mono);
}

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

.footer a:hover {
  color: var(--accent);
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 1rem;
}

/* --- Filter Buttons --- */
.filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.filter-btn {
  font-family: var(--mono);
  font-size: 0.75rem;
  padding: 0.4rem 0.85rem;
  background: var(--bg-primary);
  color: var(--text-secondary);
  border: 1px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  transition: all var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background: var(--accent-glow);
  color: var(--accent);
  border-color: var(--accent);
}

/* --- Mobile Responsive --- */
@media (max-width: 768px) {
  .hero-content {
    grid-template-columns: 1fr;
    gap: 2rem;
    text-align: center;
  }

  .hero-text h1 {
    font-size: 2rem;
  }

  .hero-bio {
    max-width: 100%;
  }

  .hero-photo {
    order: -1;
  }

  .photo-placeholder,
  .hero-photo img {
    width: 200px;
    height: 200px;
  }

  .interests {
    justify-content: center;
  }

  .hero-affiliation {
    justify-content: center;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 1rem;
  }

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

  .hamburger {
    display: flex;
  }

  .pub-entry {
    grid-template-columns: 1fr;
    gap: 0.5rem;
    padding: 1rem;
  }

  .pub-year {
    font-size: 0.75rem;
  }

  .container {
    padding: 2rem 1.25rem;
  }

  .section-header h1 {
    font-size: 1.5rem;
  }

  .stats-row {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* --- Animations --- */
.animate-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

.animate-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Manuscript Status Tags --- */
.status-tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  display: inline-block;
  margin-bottom: 0.25rem;
}

.status-rr {
  background: var(--award-bg);
  color: var(--award);
  border: 1px solid rgba(217, 119, 6, 0.2);
}

.status-ur {
  background: var(--tag-bg);
  color: var(--accent);
  border: 1px solid rgba(79, 70, 229, 0.2);
}

.status-ongoing {
  background: var(--data-bg);
  color: var(--data-text);
  border: 1px solid var(--data-border);
}

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

.nav-dropdown > a::after {
  content: '';
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0.5rem 0;
  min-width: 280px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  list-style: none;
  z-index: 200;
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  display: block;
}

.dropdown-menu li a {
  display: block;
  padding: 0.5rem 1rem;
  font-size: 0.825rem;
  color: var(--text-secondary);
  transition: all var(--transition);
}

.dropdown-menu li a:hover {
  background: var(--accent-glow);
  color: var(--accent);
}

/* --- Expandable Abstracts --- */
.pub-abstract {
  margin-top: 0.5rem;
}

.abstract-toggle {
  font-family: var(--mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.2rem 0;
  transition: color var(--transition);
}

.abstract-toggle:hover {
  color: var(--accent);
}

.abstract-content {
  display: none;
  margin-top: 0.5rem;
  padding: 0.75rem 1rem;
  background: var(--bg-secondary);
  border-left: 3px solid var(--accent);
  border-radius: 0 6px 6px 0;
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.abstract-content.open {
  display: block;
}

/* --- Theme Filter Label --- */
.filter-group {
  margin-bottom: 1rem;
}

.filter-group-label {
  font-family: var(--mono);
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  display: block;
}

/* --- Media Page --- */
.media-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.75rem;
}

.media-entry {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 1.25rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: all var(--transition);
}

.media-entry:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-light);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.media-year {
  font-family: var(--mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  padding-top: 0.15rem;
}

.media-content h3 {
  font-size: 0.95rem;
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: 0.2rem;
  color: var(--text-primary);
}

.media-outlet {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
}

/* --- Mobile Dropdown --- */
@media (max-width: 768px) {
  .dropdown-menu {
    position: static;
    box-shadow: none;
    border: none;
    padding: 0 0 0 1rem;
    min-width: auto;
  }

  .nav-dropdown .dropdown-menu {
    display: none;
  }

  .nav-dropdown.open .dropdown-menu {
    display: block;
  }
}