/* 共通CSS - 個人ページ用 */
/* Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans:wght@400;500;700;900&family=Public+Sans:wght@400;500;700;900&display=swap');
@import url('https://fonts.googleapis.com/icon?family=Material+Icons');

/* CSS Variables - 統一カラーシステム */
:root {
  --primary-color: #2094f3;
  --primary-color-hover: #1a78c2;
  --secondary-color: #1e293b;
  --accent-color: #64748b;
  --background-color: #f8fafc;
  --card-background-color: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #475569;
  --text-muted: #64748b;
  --border-color: #e2e8f0;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --error-color: #ef4444;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

/* Base Styles */
body {
  font-family: 'Public Sans', 'Noto Sans', sans-serif;
  background-color: var(--background-color);
  color: var(--text-primary);
  line-height: 1.6;
}

/* Layout Components */
.site-header {
  background-color: var(--card-background-color);
  border-bottom: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.site-footer {
  background-color: var(--text-primary);
  color: var(--text-muted);
  border-top: 1px solid var(--border-color);
}

.site-footer.light {
  background-color: var(--card-background-color);
  color: var(--text-muted);
}

/* Navigation */
.nav-link {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
  position: relative;
}

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

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

.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--primary-color);
}

/* Mobile Navigation */
.mobile-menu-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 0.375rem;
  background-color: transparent;
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.mobile-menu-button:hover {
  background-color: var(--background-color);
  color: var(--primary-color);
}

.mobile-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.mobile-nav.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 280px;
  height: 100%;
  background-color: var(--card-background-color);
  padding: 2rem 1.5rem;
  box-shadow: var(--shadow-lg);
  transform: translateX(100%);
  transition: transform 0.3s ease;
}

.mobile-nav.active .mobile-nav-content {
  transform: translateX(0);
}

.mobile-nav-link {
  display: block;
  padding: 0.75rem 1rem;
  color: var(--text-secondary);
  text-decoration: none;
  font-weight: 500;
  border-radius: 0.375rem;
  margin-bottom: 0.5rem;
  transition: all 0.2s ease;
}

.mobile-nav-link:hover,
.mobile-nav-link.active {
  background-color: var(--background-color);
  color: var(--primary-color);
}

/* Search Functionality */
.search-button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background-color: var(--background-color);
  color: var(--text-secondary);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
}

.search-button:hover {
  background-color: var(--border-color);
  color: var(--primary-color);
}

.search-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.search-modal.active {
  opacity: 1;
  visibility: visible;
}

.search-modal-content {
  background-color: var(--card-background-color);
  border-radius: 0.75rem;
  box-shadow: var(--shadow-lg);
  width: 90%;
  max-width: 500px;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.search-modal.active .search-modal-content {
  transform: scale(1);
}

.search-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 1.5rem 1rem;
  border-bottom: 1px solid var(--border-color);
}

.search-modal-header h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.search-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.25rem;
  transition: all 0.2s ease;
}

.search-close:hover {
  background-color: var(--background-color);
  color: var(--text-primary);
}

.search-modal-body {
  padding: 1.5rem;
}

.search-input-group {
  display: flex;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  overflow: hidden;
  background-color: var(--background-color);
}

.search-input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: none;
  background: transparent;
  font-size: 1rem;
  color: var(--text-primary);
  outline: none;
}

.search-input::placeholder {
  color: var(--text-muted);
}

.search-submit {
  padding: 0.75rem 1rem;
  background-color: var(--primary-color);
  color: white;
  border: none;
  cursor: pointer;
  transition: background-color 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-submit:hover {
  background-color: var(--primary-color-hover);
}

.search-help {
  margin-top: 0.75rem;
  font-size: 0.875rem;
  color: var(--text-muted);
  text-align: center;
}

/* Semantic Content Classes */
.researcher-name {
  color: var(--secondary-color);
  font-size: 1.875rem; /* text-3xl */
  font-weight: 700; /* font-bold */
  line-height: 1.25; /* leading-tight */
  letter-spacing: -0.025em; /* tracking-tight */
}

.researcher-title {
  color: var(--primary-color);
  font-size: 1.125rem; /* text-lg */
  font-weight: 500; /* font-medium */
  margin-top: 0.25rem; /* mt-1 */
}

.researcher-affiliation {
  color: var(--text-muted);
  font-size: 1rem; /* text-base */
  font-weight: 400; /* font-normal */
  margin-top: 0.125rem; /* mt-0.5 */
}

.section-heading {
  color: var(--heading-color);
  font-size: 1.5rem; /* text-2xl */
  font-weight: 700; /* font-bold */
  margin-bottom: 1rem; /* mb-4 */
  border-bottom: 2px solid var(--primary-color);
  padding-bottom: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.profile-section-card .section-heading {
  color: var(--text-primary);
  font-size: 1.25rem; /* text-xl */
  font-weight: 700; /* font-bold */
  margin-bottom: 0;
  border-bottom: none;
  padding: 1.5rem 1.5rem 0 1.5rem;
}

.content-description {
  color: var(--text-color);
  font-size: 1rem; /* text-base */
  font-weight: 400; /* font-normal */
  line-height: 1.625; /* leading-relaxed */
  padding: 0 1rem; /* px-4 */
}

.profile-description {
  color: var(--text-secondary);
  font-size: 1rem; /* text-base */
  font-weight: 400; /* font-normal */
  line-height: 1.625; /* leading-relaxed */
  padding: 1.5rem; /* p-6 */
}

.publication-venue {
  color: var(--secondary-text-color);
  font-size: 0.875rem; /* text-sm */
  font-weight: 500; /* font-medium */
}

.publication-title {
  color: var(--heading-color);
  font-size: 1.125rem; /* text-lg */
  font-weight: 600; /* font-semibold */
  line-height: 1.25; /* leading-tight */
}

.publication-abstract {
  color: var(--text-color);
  font-size: 0.875rem; /* text-sm */
  font-weight: 400; /* font-normal */
  line-height: 1.625; /* leading-relaxed */
}

.research-tag {
  background-color: var(--primary-color);
  color: white;
  padding: 0.25rem 0.75rem; /* px-3 py-1 */
  border-radius: 9999px; /* rounded-full */
  font-size: 0.875rem; /* text-sm */
  font-weight: 500; /* font-medium */
  display: inline-block;
  margin: 0.125rem; /* m-0.5 */
}

.contact-label {
  color: var(--text-secondary);
  font-size: 0.875rem; /* text-sm */
  font-weight: 500; /* font-medium */
  line-height: 1.5; /* leading-normal */
  padding-bottom: 0.375rem; /* pb-1.5 */
  display: block;
}

.form-field {
  display: block;
  width: 100%;
  border-radius: 0.5rem; /* rounded-lg */
  border: 1px solid var(--border-color);
  background-color: var(--background-color);
  height: 3rem; /* h-12 */
  padding: 0 1rem; /* px-4 */
  font-size: 0.875rem; /* text-sm */
  color: var(--text-secondary);
  transition: box-shadow 0.15s ease-in-out;
}

.form-field:focus {
  border-color: var(--primary-color);
  outline: none;
  box-shadow: 0 0 0 3px rgba(32, 148, 243, 0.1);
}

/* Markdown Content Styles */
.markdown-content {
  line-height: 1.8;
  color: var(--text-primary);
}

.markdown-content h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 1.5rem;
  border-bottom: 3px solid var(--primary-color);
  padding-bottom: 0.5rem;
}

.markdown-content h2 {
  font-size: 2rem;
  font-weight: 600;
  color: var(--secondary-color);
  margin-top: 2rem;
  margin-bottom: 1rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.25rem;
}

.markdown-content h3 {
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.markdown-content h4 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 1rem;
  margin-bottom: 0.5rem;
}

.markdown-content p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.markdown-content ul, .markdown-content ol {
  margin-bottom: 1rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.markdown-content li {
  margin-bottom: 0.5rem;
}

.markdown-content a {
  color: var(--primary-color);
  text-decoration: underline;
  transition: color 0.2s ease-in-out;
}

.markdown-content a:hover {
  color: var(--primary-color-hover);
}

.markdown-content code {
  background-color: #f1f5f9;
  color: #dc2626;
  padding: 0.125rem 0.25rem;
  border-radius: 0.25rem;
  font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
  font-size: 0.875rem;
}

.markdown-content pre {
  background-color: #1e293b;
  color: #f8fafc;
  padding: 1rem;
  border-radius: 0.5rem;
  overflow-x: auto;
  margin-bottom: 1rem;
}

.markdown-content pre code {
  background-color: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
}

.markdown-content blockquote {
  border-left: 4px solid var(--primary-color);
  padding-left: 1rem;
  margin: 1rem 0;
  color: var(--text-secondary);
  font-style: italic;
}

.markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
}

.markdown-content th, .markdown-content td {
  border: 1px solid var(--border-color);
  padding: 0.5rem;
  text-align: left;
}

.markdown-content th {
  background-color: var(--background-color);
  font-weight: 600;
}

.form-field::placeholder {
  color: var(--text-muted);
}

.form-textarea {
  padding: 1rem; /* p-4 */
  resize: vertical;
  min-height: 5rem;
}

.page-title {
  color: var(--secondary-color);
  font-size: 2.25rem; /* text-4xl */
  font-weight: 700; /* font-bold */
  line-height: 1.25; /* leading-tight */
  letter-spacing: -0.025em; /* tracking-tight */
}

.page-subtitle {
  color: var(--accent-color);
  font-size: 1rem; /* text-base */
  font-weight: 400; /* font-normal */
  line-height: 1.625; /* leading-relaxed */
}

.news-title {
  color: var(--text-secondary);
  font-size: 1.25rem; /* text-xl */
  font-weight: 600; /* font-semibold */
}

.news-description {
  color: var(--text-muted);
  font-size: 1rem; /* text-base */
  line-height: 1.625; /* leading-relaxed */
}

.course-title {
  color: var(--text-primary);
  font-size: 1.125rem; /* text-lg */
  font-weight: 600; /* font-semibold */
}

.course-semester {
  color: var(--text-muted);
  font-size: 0.875rem; /* text-sm */
  font-weight: 500; /* font-medium */
}

.course-description {
  color: var(--text-secondary);
  font-size: 0.875rem; /* text-sm */
  line-height: 1.625; /* leading-relaxed */
  margin-top: 0.5rem;
}

/* Typography */
.section-title {
  color: var(--text-primary);
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-color);
}

.profile-name {
  color: var(--text-primary);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.2;
}

.profile-title {
  color: var(--primary-color);
  font-size: 1.125rem;
  font-weight: 500;
  margin-top: 0.25rem;
}

.profile-affiliation {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 400;
  margin-top: 0.125rem;
}

/* Cards and Items */
.card {
  background-color: var(--card-background-color);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
}

.item-card {
  background-color: var(--card-background-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}

.item-card:hover {
  box-shadow: var(--shadow-md);
}

.item-title {
  color: var(--text-primary);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

.item-subtitle {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
  margin-top: 0.25rem;
}

.item-meta {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 400;
  margin-top: 0.5rem;
  font-style: italic;
}

.item-description {
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 400;
  line-height: 1.5;
  margin-top: 0.5rem;
}

.item-link {
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  margin-top: 0.5rem;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: color 0.2s ease;
}

.item-link:hover {
  text-decoration: underline;
}

/* Research/Publication specific styles */
.research-card {
  background-color: var(--card-background-color);
  border: 1px solid var(--border-color);
  border-radius: 0.75rem;
  padding: 1.5rem;
  box-shadow: var(--shadow-lg);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: box-shadow 0.3s ease;
}

.research-card:hover {
  box-shadow: var(--shadow-lg);
}

.research-card-image {
  width: 100%;
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  border-radius: 0.5rem;
}

@media (min-width: 768px) {
  .research-card {
    flex-direction: row;
    align-items: flex-start;
  }
  
  .research-card-image {
    width: 33.333333%;
    flex-shrink: 0;
  }
}

/* Profile sections */
.profile-section-card {
  background-color: var(--card-background-color);
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.profile-section-title {
  color: var(--text-primary);
  font-size: 1.25rem;
  font-weight: 600;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

.profile-list-item {
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
}

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

.profile-list-item-title {
  color: var(--text-primary);
  font-size: 1rem;
  font-weight: 500;
}

.profile-list-item-subtitle {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-weight: 400;
}

.profile-list-item-link {
  color: var(--primary-color);
  font-size: 1rem;
  font-weight: 400;
  text-decoration: none;
  transition: text-decoration 0.2s ease;
}

.profile-list-item-link:hover {
  text-decoration: underline;
}

/* Teaching Page Styles */
.list-item-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary-color);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  margin-top: 0.5rem;
  transition: color 0.2s ease;
}

.list-item-link:hover {
  color: var(--primary-color-hover);
}

.list-item-link svg {
  transition: transform 0.2s ease;
}

.list-item-link:hover svg {
  transform: translateX(2px);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 0.5rem;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  outline: none;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  padding: 0.75rem 1.5rem;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  background-color: var(--primary-color-hover);
  box-shadow: var(--shadow-md);
}

.pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: 9999px;
  background-color: var(--primary-color);
  color: white;
  padding: 0.375rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  box-shadow: var(--shadow-sm);
  transition: all 0.2s ease;
}

.pill:hover {
  background-color: var(--primary-color-hover);
}

/* Form Elements */
.form-input, .form-textarea {
  width: 100%;
  border: 1px solid var(--border-color);
  border-radius: 0.5rem;
  background-color: #f8fafc;
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  color: var(--text-primary);
  transition: all 0.2s ease;
}

.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(32, 148, 243, 0.1);
}

.form-label {
  display: block;
  color: var(--text-primary);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.375rem;
}

/* Profile Images */
.profile-image {
  width: 10rem;
  height: 10rem;
  background-size: cover;
  background-position: center;
  border-radius: 50%;
  border: 4px solid white;
  box-shadow: var(--shadow-md);
}

.profile-image-large {
  width: 12rem;
  height: 12rem;
}

@media (min-width: 768px) {
  .profile-image-large {
    width: 12rem;
    height: 12rem;
  }
}

/* Hero Profile Image */
.hero-profile-image {
  width: 10rem;
  height: 10rem;
  background-size: cover;
  background-position: center;
  border-radius: 50%;
  border: 2px solid var(--primary-color);
  box-shadow: var(--shadow-md);
}

/* Background Images for Research Cards */
.research-image-1 {
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuAl4u5ska_1nbH3lrPL9bR9cVAQLzvLSY_IwQt27fAapGzDPb4NJNvP8PjHepe-phVaWEFcImtuV20gS6uhIOMnvc-HrV6F64R9q8UsJvX3i6dDCOXuIyFg4c2TqO5NW9AX1sT8ugIFTPY8mrKk4YLPSR25O_CbLnjKyu7Qy4-dI929PMIatjp4FeHD6yuaYtQhhuQIXaanctevpRM84s57S0F_lwVnLnpPPZpp6De4rjgOFBvX47LO2mFUM8BA-5hnQkrXaVA9Cgo");
}

.research-image-2 {
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuAU_jVT-J3c2_b-IWsLRTP5fPENVEgX_XWJMQHUWmntfPPxRLtXebbAQDcUoMp5fnpc7TfLMBJQND7OCnoWDP4uGzUmgQ2WqMdE6-VuILhJK5bkYMBnQ-JmzM5YQtiLEehBRmTEpwaDDkeWTIAB0uUWLbg47Ox3TznK250EEzYqh-zCo6p3Hzeg5a9yFT0PLF3QR6_KFnbr9N3zZbO8w1IYCCA3DpDQknB1RDY8GouhQMiZWHZ72petoCbUTDuT5KpSdTNz4oyORGQ");
}

.research-image-3 {
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuB4BhWuhzRlVJmDjAV7M98Veof-qmAq10oiw41-j396pTj-GagZ8_40LWYtPmB2t6zy8-u1dLH-11-t0pUM5NkeuWH5pOLlhkTZ_GPh19bTvBaq3WE54EGlP6K_aHt3peAyV-oQV0I1swlWECc1K1ealx41zaKjknM0nwdghI62Z9Ps7ygDqJquub250fyJuZ8_SIYuzE9hmrq76g1K6nadt83Z_JIeJqKLGWodTmrtz8sjgZZvjFcl9zQUT1xj7vuUc7C9fYP9wPw");
}

/* Standard profile images */
.profile-image-evelyn {
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuBCVLzSvy6KVrqrWs9J32OXIIhFG3ZXAAKe9dODp5sjKHzvyG2tQaFzDVuvbQ4UNP6-s0WtjsNcLszugw1qRb5P5GRQbf0vMUmJtbjUgJNMHoOrv2tjYyR0bD4du2mSZpSsIrWDjoHdu3GU4aZsJMiV5NGcj7Qip5DELLyftaE-BYRrelFPWpeA8xf1zr6KqsnKyTXmysPXSwLd_OYLYwV6JxUHfvrREL_FulAsfZWEhVZ9x30-ahWXLWz4lPQtjjYLN8uEv4y_txE");
}

.profile-image-anya {
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuANBV2X8ROLZuHKKK_ARiCwlw5vDXTJvwntzq1o-6XxTvXISpy5wMiMXlaO-WNJU5AzUB5M9RZNprD_6qKGZMYSh_cWpjoX5j6_P9xdfKjeJ0Y86fDd4Y3M0zEJzPeu69cZCIaqND0GgZDouw4CPb9EnPlQCZlFR3Tq2ck6bF-xDUj_Brs50vfojDz9CWacrkWrP1HpBwuSmVToslomnImK_PfzekRpGaWmBD8vibci71VegbbQv_pUx4UEnAwCj-vnMKO5Ki3PU64");
}

.profile-image-okabe {
  background: linear-gradient(135deg, #2094f3 0%, #1e293b 100%);
}

/* Placeholder images for local development */
.profile-image-placeholder {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  position: relative;
}

.profile-image-placeholder::before {
  content: '👤';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 1.5rem;
  opacity: 0.8;
}

.research-image-placeholder {
  background: linear-gradient(135deg, var(--background-color), var(--border-color));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.research-image-placeholder::before {
  content: '📊';
  font-size: 2rem;
  opacity: 0.6;
}

.news-image-placeholder {
  background: linear-gradient(135deg, var(--accent-color), var(--text-muted));
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-image-placeholder::before {
  content: '📰';
  font-size: 2rem;
  opacity: 0.6;
}

/* News/Research images */
.news-image-1 {
  width: 100%;
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuCKZNCnDMhEtHQRnkDKFz2SzudqyfWXZMkce8QhAoh4-JgwhG_lPccVvSlDvZpvgFKZ0m21ST3U7fUy5b3Qe0ukRU4l6FGf1scoh3iHKqzacsxq-vHZPwGaNKELK0P2c9ASYb73kwbD_mMz4i-C8GJSzTZ1kpdtDPI6tLRpuU7pkkGFfBaeW24nyvnU8J5yjq5j1UPlLdeiZ01FGMKF_gk1dcsdgSr1UBNKeT_cIFhLAm3UB3N1MCnF_TBRjBv8BdBgIUVkW-9Q9yQ");
}

.news-image-2 {
  width: 100%;
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuDhPYXOLBbGFpCkfCVUZoLs5Mpa1rLjDAcFpYvHuiX6S_sp2Pnb_z9b0RogrRBOJacyqJrGv3VWTXsoNS8LUq3Jg_DYhk0kJyVeDOLHL0TBEr6WEiHhMydWeoaEMnEmfwwJBny4QAmlAbnhu70niIyPx6Zc1wvWeRF0T6jmJYDLzMfQzl_iBq3gDbq84mP4TUyn7x2mv-iuTVR6jL-EctAhrZ-UIK9Ol8z1sWezohlb1pqkwJZkqy7FAsQbjWqU1vVi-ribzST93qE");
}

.news-image-3 {
  width: 100%;
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
  border-radius: 0.5rem;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  background-image: url("https://lh3.googleusercontent.com/aida-public/AB6AXuDoCWQ3CESYoSQQ6M9ecF0FYcjiNRf3yzzlWEEj0Nt9yymOXQQ80yn0f5pNN4FQP59C6UtkHnfWCDNfZJ1DMpReWV7_t49g-diOXecI3GWK66G6oCUGFonKYMS5hnHXu415IvsIhfqdpRqvsmebjvrRw9xJRxdLOmRlNEVoSmBoivmEdXhcTLzfFTw0b99QAvLlIra_Z1N0hNn2tiuAw90TH2_0pP3dCO4rJkTFHIp268Xy0cwNdoDAEhuO2l7vLrRkGj-vA1LMlkk");
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-4 { margin-bottom: 1rem; }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-4 { margin-top: 1rem; }
.mt-6 { margin-top: 1.5rem; }
.mt-8 { margin-top: 2rem; }

.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }

.rounded { border-radius: 0.25rem; }
.rounded-lg { border-radius: 0.5rem; }
.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Responsive Design */
@media (max-width: 768px) {
  .page-title {
    font-size: 1.75rem;
  }
  
  .section-title {
    font-size: 1.25rem;
  }
  
  .profile-name {
    font-size: 1.75rem;
  }
  
  .research-card {
    padding: 1rem;
  }
  
  .item-card {
    padding: 1rem;
  }
}

/* Dark mode support (future enhancement) */
@media (prefers-color-scheme: dark) {
  :root {
    --background-color: #0f172a;
    --card-background-color: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --border-color: #334155;
  }
}