/* Modern Academic Website Styling */

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

header {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 2rem 0;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

header .inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

header h1 {
  margin: 0 0 0.5rem 0;
  font-size: 2rem;
}

header h1 a {
  color: white;
  text-decoration: none;
}

header h2 {
  margin: 0 0 1rem 0;
  font-size: 1.1rem;
  font-weight: normal;
  opacity: 0.95;
}

.main-nav {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.nav-link {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  transition: background 0.3s ease;
  font-size: 0.95rem;
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.3);
}

#content-wrapper {
  padding: 2rem 0;
}

.inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 20px;
}

.clearfix::after {
  content: "";
  display: table;
  clear: both;
}

#main-content {
  float: left;
  width: 65%;
  margin-bottom: 2rem;
}

#sidebar {
  float: right;
  width: 30%;
  padding-left: 2rem;
}

.sidebar-section {
  background: #f8f9fa;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 6px;
  border: 1px solid #e9ecef;
}

.sidebar-section h3 {
  margin-top: 0;
  font-size: 1.2rem;
  color: #495057;
  border-bottom: 2px solid #667eea;
  padding-bottom: 0.5rem;
}

.sidebar-section p {
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

.sidebar-section i {
  margin-right: 0.5rem;
  color: #667eea;
  width: 1.2rem;
}

.button {
  display: inline-block;
  padding: 0.7rem 1.5rem;
  background: #667eea;
  color: white;
  text-decoration: none;
  border-radius: 4px;
  transition: background 0.3s ease;
  margin: 0.5rem 0;
  font-size: 0.9rem;
}

.button:hover {
  background: #764ba2;
}

.button small {
  display: block;
  font-size: 0.8rem;
}

h1, h2, h3, h4, h5, h6 {
  color: #2c3e50;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

h1 {
  font-size: 2rem;
  border-bottom: 3px solid #667eea;
  padding-bottom: 0.5rem;
}

h2 {
  font-size: 1.5rem;
  border-bottom: 2px solid #e9ecef;
  padding-bottom: 0.5rem;
}

h3 {
  font-size: 1.2rem;
}

a {
  color: #667eea;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

ul, ol {
  padding-left: 1.5rem;
}

li {
  margin: 0.5rem 0;
}

.post-list {
  list-style: none;
  padding: 0;
}

.post-item {
  background: #f8f9fa;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 6px;
  border-left: 4px solid #667eea;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.post-item:hover {
  transform: translateX(5px);
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.post-item h3 {
  margin-top: 0;
}

.post-meta {
  color: #6c757d;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.post-excerpt {
  color: #495057;
  line-height: 1.6;
}

.document-list {
  list-style: none;
  padding: 0;
}

.document-item {
  background: #f8f9fa;
  padding: 1rem;
  margin-bottom: 1rem;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: background 0.2s ease;
}

.document-item:hover {
  background: #e9ecef;
}

.document-item i {
  color: #667eea;
  font-size: 1.5rem;
}

.document-info {
  flex: 1;
}

.document-title {
  font-weight: 600;
  margin: 0 0 0.25rem 0;
}

.document-description {
  font-size: 0.9rem;
  color: #6c757d;
  margin: 0;
}

.paper-item, .lecture-item {
  background: #f8f9fa;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  border-radius: 6px;
  border-left: 4px solid #28a745;
}

.paper-item {
  border-left-color: #007bff;
}

.lecture-item {
  border-left-color: #ffc107;
}

.paper-item h3, .lecture-item h3 {
  margin-top: 0;
  color: #2c3e50;
}

.paper-meta, .lecture-meta {
  color: #6c757d;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}

.bio-content {
  line-height: 1.8;
}

.bio-section {
  margin-bottom: 2rem;
}

.cv-section {
  margin-bottom: 2.5rem;
}

.cv-section h2 {
  color: #667eea;
  border-bottom: 2px solid #667eea;
}

.cv-entry {
  margin-bottom: 1.5rem;
  padding-left: 1rem;
  border-left: 3px solid #e9ecef;
}

.cv-entry h3 {
  margin-top: 0;
  color: #495057;
}

.cv-entry .date {
  color: #6c757d;
  font-style: italic;
  font-size: 0.9rem;
}

@media screen and (max-width: 768px) {
  #main-content,
  #sidebar {
    float: none;
    width: 100%;
    padding: 0;
  }

  #sidebar {
    margin-top: 2rem;
  }

  .main-nav {
    flex-direction: column;
  }

  header h1 {
    font-size: 1.5rem;
  }

  header h2 {
    font-size: 1rem;
  }
}

.post-header {
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #e9ecef;
}

.post-content {
  line-height: 1.8;
}

.post-content h2 {
  margin-top: 2rem;
}

.post-footer {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 2px solid #e9ecef;
}

.category {
  background: #667eea;
  color: white;
  padding: 0.2rem 0.5rem;
  border-radius: 3px;
  font-size: 0.85rem;
  margin-right: 0.3rem;
  display: inline-block;
}

@media print {
  header {
    background: #667eea !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }

  .main-nav {
    display: none;
  }

  #sidebar {
    display: none;
  }

  #main-content {
    width: 100%;
  }
}