/* ============================================
   CSS Custom Properties
   ============================================ */
:root {
  --sidebar-width: 300px;
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-bg: #eff6ff;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-text-muted: #94a3b8;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --color-border-light: #f1f5f9;
  --color-sidebar-bg: #f8fafc;
  --color-card-bg: #ffffff;
  --color-badge-bg: #dbeafe;
  --color-badge-text: #1e40af;
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-section-bg: #ffffff;
  --color-section-border: #e2e8f0;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
  --transition: 0.25s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
}

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

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

a:hover {
  color: var(--color-primary-light);
}

img {
  max-width: 100%;
  display: block;
}

/* ============================================
   Layout
   ============================================ */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar-bg);
  border-right: 1px solid var(--color-border);
  overflow-y: auto;
  z-index: 100;
}

.sidebar-inner {
  padding: 40px 24px 32px;
  display: flex;
  flex-direction: column;
  min-height: 100%;
}

.main-content {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  background: var(--color-bg-alt);
}

/* ============================================
   Mobile Header
   ============================================ */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 200;
}

.mobile-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  height: 100%;
}

.mobile-name {
  font-weight: 600;
  font-size: 17px;
  color: var(--color-text);
}

.hamburger {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--color-text);
  cursor: pointer;
  padding: 8px;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.hamburger:hover {
  background: var(--color-border-light);
}

/* ============================================
   Profile Card
   ============================================ */
.profile-card {
  text-align: center;
  margin-bottom: 32px;
}

.avatar-wrapper {
  width: 150px;
  height: 150px;
  margin: 0 auto 20px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid var(--color-bg);
  box-shadow: var(--shadow-md);
}

.avatar {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 4px;
  letter-spacing: -0.3px;
}

.profile-title {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 12px;
}

.profile-keywords {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 6px;
  margin-bottom: 12px;
}

.keyword-tag {
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border-radius: 20px;
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
}

.profile-location {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 16px;
}

.profile-location i {
  margin-right: 4px;
}

.profile-links {
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.profile-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-bg);
  color: var(--color-text-secondary);
  font-size: 16px;
  transition: all var(--transition);
  border: 1px solid var(--color-border);
}

.profile-link:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ============================================
   Sidebar Navigation
   ============================================ */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}

.nav-link i {
  width: 18px;
  text-align: center;
  font-size: 14px;
}

.nav-link:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.nav-link.active {
  color: var(--color-primary);
  background: var(--color-primary-bg);
  font-weight: 600;
}

/* ============================================
   Sections
   ============================================ */
.main-content {
  padding: 24px 32px;
}

.section {
  padding: 36px 40px 32px;
  margin-bottom: 20px;
  background: var(--color-section-bg);
  border: 1px solid var(--color-section-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.section:last-of-type {
  margin-bottom: 0;
}

#about {
  background: #fff8f0;
  border-color: #fde8d0;
}

#news {
  background: #f0faf0;
  border-color: #d0ecd0;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
  letter-spacing: -0.3px;
}

.section-title i {
  color: var(--color-primary);
  margin-right: 8px;
  font-size: 20px;
}

.section-subtitle {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 24px;
}

/* ============================================
   About / Bio
   ============================================ */
.greeting {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-text);
}

.greeting .wave {
  display: inline-block;
  animation: wave 2.5s infinite;
  transform-origin: 70% 70%;
}

@keyframes wave {
  0%, 60%, 100% { transform: rotate(0deg); }
  10%, 30% { transform: rotate(14deg); }
  20% { transform: rotate(-8deg); }
  40% { transform: rotate(-4deg); }
  50% { transform: rotate(10deg); }
}

.bio {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text);
  margin-bottom: 20px;
}

.bio p {
  margin-bottom: 12px;
}

.bio-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-primary-light);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-bg);
  transform: translateY(-1px);
}

/* ============================================
   News
   ============================================ */
.news-list {
  list-style: none;
}

.news-item {
  display: flex;
  gap: 16px;
  padding: 10px 0;
  font-size: 14px;
  line-height: 1.6;
  border-bottom: 1px solid var(--color-border-light);
}

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

.news-date {
  flex-shrink: 0;
  font-weight: 600;
  color: var(--color-primary);
  font-size: 13px;
  min-width: 70px;
  padding-top: 1px;
}

.news-text {
  color: var(--color-text);
}

.news-text a {
  font-weight: 500;
}

.toggle-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  padding: 8px 18px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
}

.toggle-btn:hover {
  background: var(--color-badge-bg);
}

.toggle-btn i {
  transition: transform var(--transition);
}

.toggle-btn.expanded i {
  transform: rotate(180deg);
}

/* ============================================
   Publications
   ============================================ */
.pub-year-group {
  margin-bottom: 32px;
}

.pub-year-heading {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.pub-card {
  display: flex;
  gap: 20px;
  padding: 20px;
  margin-bottom: 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-card-bg);
  transition: all var(--transition);
}

.pub-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.pub-card.highlighted {
  border-left: 4px solid var(--color-primary);
}

.pub-image {
  flex-shrink: 0;
  width: 200px;
  height: 130px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
}

.pub-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pub-image-placeholder {
  font-size: 28px;
  color: var(--color-text-muted);
}

.pub-info {
  flex: 1;
  min-width: 0;
}

.pub-venue {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 20px;
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.3px;
}

.pub-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.pub-title a {
  color: inherit;
}

.pub-title a:hover {
  color: var(--color-primary);
}

.pub-authors {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
  line-height: 1.5;
}

.pub-authors .self {
  font-weight: 600;
  color: var(--color-text);
}

.pub-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 8px;
}

.pub-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 4px;
  background: #fef3c7;
  color: #92400e;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  transition: all var(--transition);
}

.pub-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.pub-link i {
  font-size: 11px;
}

/* ============================================
   Timeline (Education, Experience, Honors)
   ============================================ */
.timeline {
  position: relative;
  padding-left: 28px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: var(--color-border);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding-bottom: 28px;
}

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

.timeline-item::before {
  content: '';
  position: absolute;
  left: -24px;
  top: 8px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 2px solid var(--color-bg);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.timeline-period {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.timeline-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.timeline-subtitle {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 2px;
}

.timeline-subtitle a {
  color: inherit;
  font-weight: 500;
}

.timeline-subtitle a:hover {
  color: var(--color-primary);
}

.timeline-location {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.timeline-location i {
  margin-right: 4px;
}

.timeline-details {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================
   Honors
   ============================================ */
.honors-year-group {
  margin-bottom: 24px;
}

.honors-year-heading {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 12px;
}

.honor-item {
  display: flex;
  gap: 12px;
  padding: 12px 16px;
  margin-bottom: 8px;
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border-light);
}

.honor-icon {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-badge-bg);
  color: var(--color-badge-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.honor-info {
  flex: 1;
}

.honor-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.honor-context {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ============================================
   Services
   ============================================ */
.services-list {
  display: grid;
  gap: 12px;
}

.service-item {
  display: flex;
  gap: 14px;
  padding: 16px 20px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-card-bg);
  transition: all var(--transition);
}

.service-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

.service-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-bg);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.service-info {
  flex: 1;
}

.service-role {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.service-venue {
  font-size: 13px;
  color: var(--color-text-secondary);
}

.service-venue a {
  color: var(--color-primary);
  font-weight: 500;
}

/* ============================================
   Empty State
   ============================================ */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
  font-size: 14px;
}

.empty-state i {
  font-size: 32px;
  display: block;
  margin-bottom: 12px;
}

/* ============================================
   ClustrMaps
   ============================================ */
.clustrmaps-container {
  display: flex;
  justify-content: center;
  padding: 20px 0 0;
}

/* ============================================
   Footer
   ============================================ */
.footer {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: var(--color-text-muted);
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 1024px) {
  .main-content {
    padding: 20px 20px;
  }

  .section {
    padding: 28px 24px 20px;
  }

  .footer {
    padding: 24px 32px;
  }

  .pub-card {
    flex-direction: column;
  }

  .pub-image {
    width: 100%;
    height: 120px;
  }
}

@media (max-width: 768px) {
  .mobile-header {
    display: block;
  }

  .sidebar {
    position: fixed;
    top: 56px;
    left: -100%;
    width: 280px;
    height: calc(100vh - 56px);
    transition: left var(--transition);
    box-shadow: var(--shadow-lg);
  }

  .sidebar.open {
    left: 0;
  }

  .sidebar-overlay {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 99;
  }

  .sidebar-overlay.active {
    display: block;
  }

  .main-content {
    margin-left: 0;
    padding: 56px 12px 12px;
  }

  .section {
    padding: 24px 16px 18px;
  }

  .footer {
    padding: 20px;
  }

  .greeting {
    font-size: 22px;
  }

  .section-title {
    font-size: 20px;
  }

  .pub-card {
    padding: 16px;
    flex-direction: column;
  }

  .pub-image {
    width: 100%;
    height: 100px;
  }

  .bio-actions {
    flex-direction: column;
  }

  .btn {
    justify-content: center;
  }
}

/* ============================================
   Scrollbar
   ============================================ */
.sidebar::-webkit-scrollbar {
  width: 4px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 4px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: var(--color-text-muted);
}

/* ============================================
   Print
   ============================================ */
@media print {
  .sidebar,
  .mobile-header,
  .toggle-btn,
  .bio-actions {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .section {
    padding: 16px 0;
    break-inside: avoid;
  }

  .pub-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }
}