/* Reset and Base Styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: #f5f7fa;
  color: #333;
  line-height: 1.6;
}

/* Header */
.main-header {
  background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
  color: white;
  padding: 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  max-width: 1600px;
  margin: 0 auto;
}

.header-left {
  display: flex;
  align-items: center;
  gap: 15px;
}

.header-left h1 {
  font-size: 22px;
  font-weight: 600;
}

.hamburger-menu {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger-menu.active span:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.hamburger-menu.active span:nth-child(2) {
  opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Timeframe Selector */
.header-center {
  flex: 1;
  display: flex;
  justify-content: center;
}

.timeframe-selector {
  display: flex;
  gap: 8px;
  background: rgba(255, 255, 255, 0.15);
  padding: 5px;
  border-radius: 8px;
}

.timeframe-btn {
  padding: 10px 24px;
  background: transparent;
  color: white;
  border: 2px solid transparent;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.timeframe-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.timeframe-btn.active {
  background: white;
  color: #2a5298;
  border-color: white;
}

.header-right {
  display: flex;
  align-items: center;
}

.about-link {
  color: white;
  text-decoration: none;
  padding: 10px 20px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.about-link:hover {
  background: rgba(255, 255, 255, 0.25);
}

/* Sidebar Overlay (Mobile) */
.sidebar-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 98;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.sidebar-overlay.active {
  display: block;
  opacity: 1;
}

/* Main Container */
.main-container {
  display: flex;
  max-width: 1600px;
  margin: 0 auto;
  padding: 20px;
  gap: 20px;
}

/* Sidebar */
.sidebar {
  width: 300px;
  min-width: 300px;
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  height: fit-content;
  position: sticky;
  top: 90px;
  transition: transform 0.3s ease;
}

.sidebar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e8edf2;
}

.sidebar-header h2 {
  font-size: 20px;
  color: #1e3c72;
}

.close-sidebar {
  display: none;
  background: none;
  border: none;
  font-size: 32px;
  color: #5a6c7d;
  cursor: pointer;
  line-height: 1;
  padding: 0;
  width: 32px;
  height: 32px;
}

.close-sidebar:hover {
  color: #1e3c72;
}

/* Accordion */
.accordion-item {
  margin-bottom: 12px;
  border: 1px solid #e0e4e8;
  border-radius: 6px;
  overflow: hidden;
  background: white;
}

.accordion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 16px;
  background: #f8fafc;
  cursor: pointer;
  font-weight: 600;
  color: #2a5298;
  transition: all 0.3s ease;
  user-select: none;
}

.accordion-header:hover {
  background: #eef2f7;
}

.accordion-header.active {
  background: #2a5298;
  color: white;
}

.accordion-arrow {
  transition: transform 0.3s ease;
  font-size: 12px;
}

.accordion-header.active .accordion-arrow {
  transform: rotate(-180deg);
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  background: white;
}

.accordion-content.active {
  max-height: 400px;
  padding: 15px;
  border-top: 1px solid #e0e4e8;
}

/* Search Box */
.search-box {
  width: 100%;
  padding: 8px 12px;
  margin-bottom: 10px;
  border: 1px solid #d0d7de;
  border-radius: 4px;
  font-size: 14px;
  transition: border-color 0.2s;
}

.search-box:focus {
  outline: none;
  border-color: #2a5298;
  box-shadow: 0 0 0 3px rgba(42, 82, 152, 0.1);
}

/* Select All Label */
.select-all-label {
  display: block;
  padding: 8px 0;
  margin-bottom: 8px;
  font-weight: 600;
  color: #2a5298;
  border-bottom: 1px solid #e8edf2;
  cursor: pointer;
}

.select-all-label input {
  margin-right: 6px;
  cursor: pointer;
}

/* Checkbox Panel */
.checkbox-panel {
  max-height: 220px;
  overflow-y: auto;
  padding: 5px 0;
}

.checkbox-panel::-webkit-scrollbar {
  width: 6px;
}

.checkbox-panel::-webkit-scrollbar-track {
  background: #f1f3f5;
  border-radius: 3px;
}

.checkbox-panel::-webkit-scrollbar-thumb {
  background: #c1c9d2;
  border-radius: 3px;
}

.checkbox-panel::-webkit-scrollbar-thumb:hover {
  background: #a8b3c1;
}

.checkbox-panel label {
  display: block;
  padding: 6px 8px;
  margin: 2px 0;
  cursor: pointer;
  transition: background 0.2s;
  border-radius: 4px;
  font-size: 14px;
}

.checkbox-panel label:hover {
  background: #f8fafc;
}

.checkbox-panel input[type="checkbox"] {
  margin-right: 8px;
  cursor: pointer;
}

/* Primary Button */
.primary-btn {
  width: 100%;
  padding: 12px 20px;
  margin-top: 20px;
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 2px 6px rgba(42, 82, 152, 0.3);
}

.primary-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(42, 82, 152, 0.4);
}

.primary-btn:active {
  transform: translateY(0);
}

/* Content Area */
.content-area {
  flex: 1;
  min-width: 0;
}

/* View Controls */
.view-controls {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  background: white;
  padding: 10px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.view-btn {
  flex: 1;
  padding: 12px 24px;
  background: #f8fafc;
  color: #5a6c7d;
  border: 2px solid #e0e4e8;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.view-btn:hover {
  background: #eef2f7;
  border-color: #c1c9d2;
}

.view-btn.active {
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
  color: white;
  border-color: #2a5298;
  box-shadow: 0 2px 8px rgba(42, 82, 152, 0.3);
}

/* Placeholder Message */
.placeholder-message {
  background: white;
  border-radius: 8px;
  padding: 60px 40px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.placeholder-message h2 {
  color: #1e3c72;
  font-size: 28px;
  margin-bottom: 12px;
}

.placeholder-message h3 {
  color: #2a5298;
  font-size: 24px;
  margin-bottom: 10px;
}

.placeholder-message p {
  color: #5a6c7d;
  font-size: 16px;
}

/* View Container */
.view-container {
  background: white;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

/* Table Controls */
.table-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 15px;
  flex-wrap: wrap;
  gap: 10px;
}

.secondary-btn {
  padding: 10px 20px;
  background: #28a745;
  color: white;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.secondary-btn:hover {
  background: #218838;
  transform: translateY(-1px);
  box-shadow: 0 2px 6px rgba(40, 167, 69, 0.3);
}

.pagination-controls label {
  font-size: 14px;
  color: #5a6c7d;
  font-weight: 600;
}

.pagination-controls select {
  padding: 6px 10px;
  margin-left: 8px;
  border: 1px solid #d0d7de;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
}

/* Table Wrapper */
.table-wrapper {
  overflow-x: auto;
  border: 1px solid #e0e4e8;
  border-radius: 6px;
  margin-bottom: 15px;
}

/* Table Styles */
#dataTable {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 13px;
}

#dataTable thead {
  position: sticky;
  top: 0;
  z-index: 10;
}

#dataTable th {
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
  color: white;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
  border-bottom: 2px solid #1e3c72;
}

#dataTable th:first-child {
  position: sticky;
  left: 0;
  z-index: 11;
  min-width: 250px;
  max-width: 250px;
  white-space: normal;
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
}

#dataTable td {
  padding: 10px 16px;
  border-bottom: 1px solid #e8edf2;
  white-space: nowrap;
}

#dataTable td:first-child {
  position: sticky;
  left: 0;
  background: white;
  z-index: 5;
  min-width: 250px;
  max-width: 250px;
  white-space: normal;
  font-weight: 600;
  color: #2a5298;
  border-right: 2px solid #e0e4e8;
}

#dataTable tbody tr:nth-child(even) td:first-child {
  background: #f8fafc;
}

#dataTable tbody tr:hover td {
  background: #f0f4f8;
}

#dataTable tbody tr:hover td:first-child {
  background: #e8edf2;
}

/* Pagination Footer */
.pagination-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 15px;
  flex-wrap: wrap;
  gap: 10px;
}

.pagination-info {
  font-size: 14px;
  color: #5a6c7d;
  font-weight: 600;
}

.pagination-buttons {
  display: flex;
  gap: 8px;
}

.pagination-btn {
  padding: 8px 16px;
  background: #f8fafc;
  color: #2a5298;
  border: 1px solid #d0d7de;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.pagination-btn:hover:not(:disabled) {
  background: #eef2f7;
  border-color: #2a5298;
}

.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Chart Controls */
.chart-controls {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.chart-select {
  flex: 1;
  min-width: 250px;
}

.chart-select label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #2a5298;
  margin-bottom: 6px;
}

.chart-dropdown {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid #d0d7de;
  border-radius: 4px;
  font-size: 14px;
  cursor: pointer;
  background: white;
  transition: border-color 0.2s;
}

.chart-dropdown:focus {
  outline: none;
  border-color: #2a5298;
  box-shadow: 0 0 0 3px rgba(42, 82, 152, 0.1);
}

/* Chart Canvas Wrapper */
.chart-canvas-wrapper {
  position: relative;
  height: 400px;
  padding: 20px 0;
}

/* Footer */
.main-footer {
  background: #1e3c72;
  color: white;
  text-align: center;
  padding: 30px 20px;
  margin-top: 40px;
}

.footer-content p {
  margin: 8px 0;
  font-size: 14px;
}

.footer-links a {
  color: white;
  text-decoration: none;
  margin: 0 8px;
  transition: opacity 0.3s ease;
}

.footer-links a:hover {
  opacity: 0.8;
  text-decoration: underline;
}

.copyright {
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  margin-top: 10px;
}

/* ==================== ABOUT PAGE STYLES ==================== */

.about-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 20px;
}

.about-hero {
  text-align: center;
  padding: 60px 20px;
  background: white;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.about-hero h1 {
  font-size: 36px;
  color: #1e3c72;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 18px;
  color: #5a6c7d;
}

.mission-section {
  background: white;
  padding: 50px 40px;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.mission-section h2 {
  font-size: 28px;
  color: #1e3c72;
  margin-bottom: 20px;
  text-align: center;
}

.mission-content p {
  font-size: 16px;
  line-height: 1.8;
  color: #4a5568;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.team-section {
  margin-bottom: 40px;
}

.team-section h2 {
  font-size: 28px;
  color: #1e3c72;
  margin-bottom: 40px;
  text-align: center;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.team-card {
  background: white;
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.team-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.team-photo {
  margin-bottom: 20px;
  text-align: center;
}

.photo-placeholder {
  width: 120px;
  height: 120px;
  margin: 0 auto;
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  font-weight: 700;
}

.team-info h3 {
  font-size: 22px;
  color: #1e3c72;
  margin-bottom: 5px;
}

.team-role {
  font-size: 15px;
  color: #2a5298;
  font-weight: 600;
  margin-bottom: 15px;
}

.team-bio {
  font-size: 14px;
  line-height: 1.7;
  color: #4a5568;
  margin-bottom: 15px;
}

.team-expertise {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 15px;
}

.expertise-tag {
  background: #eef2f7;
  color: #2a5298;
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
}

.approach-section {
  background: white;
  padding: 50px 40px;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.approach-section h2 {
  font-size: 28px;
  color: #1e3c72;
  margin-bottom: 40px;
  text-align: center;
}

.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.approach-item {
  text-align: center;
  padding: 20px;
}

.approach-icon {
  font-size: 48px;
  margin-bottom: 15px;
}

.approach-item h4 {
  font-size: 18px;
  color: #1e3c72;
  margin-bottom: 10px;
}

.approach-item p {
  font-size: 14px;
  line-height: 1.6;
  color: #5a6c7d;
}

.sources-section {
  background: white;
  padding: 50px 40px;
  border-radius: 12px;
  margin-bottom: 40px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.sources-section h2 {
  font-size: 28px;
  color: #1e3c72;
  margin-bottom: 20px;
  text-align: center;
}

.sources-intro {
  text-align: center;
  color: #5a6c7d;
  margin-bottom: 30px;
}

.sources-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.source-badge {
  background: linear-gradient(135deg, #2a5298 0%, #1e3c72 100%);
  color: white;
  padding: 10px 20px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 2px 6px rgba(42, 82, 152, 0.2);
}

.contact-section {
  background: white;
  padding: 50px 40px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.contact-section h2 {
  font-size: 28px;
  color: #1e3c72;
  margin-bottom: 20px;
}

.contact-section p {
  color: #5a6c7d;
  margin-bottom: 25px;
}

.contact-info {
  max-width: 500px;
  margin: 0 auto;
  text-align: left;
}

.contact-info p {
  margin: 10px 0;
  font-size: 15px;
}

.contact-info a {
  color: #2a5298;
  text-decoration: none;
}

.contact-info a:hover {
  text-decoration: underline;
}

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

/* Tablet */
@media (max-width: 1024px) {
  .main-container {
    flex-direction: column;
  }

  .sidebar {
    width: 100%;
    position: static;
  }

  .content-area {
    width: 100%;
  }

  .team-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  }
}

/* Mobile */
@media (max-width: 768px) {
  .hamburger-menu {
    display: flex;
  }

  .header-left h1 {
    font-size: 16px;
  }

  .header-center {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 101;
  }

  .timeframe-selector {
    flex-direction: column;
    gap: 5px;
  }

  .timeframe-btn {
    padding: 8px 16px;
    font-size: 13px;
  }

  .about-link {
    padding: 8px 12px;
    font-size: 14px;
  }

  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 280px;
    z-index: 99;
    transform: translateX(-100%);
    padding-top: 60px;
    overflow-y: auto;
  }

  .sidebar.active {
    transform: translateX(0);
  }

  .close-sidebar {
    display: block;
  }

  .view-controls {
    flex-direction: column;
  }

  .view-btn {
    width: 100%;
  }

  .table-controls {
    flex-direction: column;
    align-items: flex-start;
  }

  .pagination-footer {
    flex-direction: column;
    align-items: flex-start;
  }

  #dataTable th:first-child,
  #dataTable td:first-child {
    min-width: 180px;
    max-width: 180px;
  }

  .about-hero h1 {
    font-size: 28px;
  }

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

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

@media (max-width: 480px) {
  .header-left h1 {
    font-size: 14px;
  }

  .placeholder-message {
    padding: 40px 20px;
  }

  .placeholder-message h2 {
    font-size: 22px;
  }

  .about-hero {
    padding: 40px 20px;
  }

  .mission-section,
  .approach-section,
  .sources-section,
  .contact-section {
    padding: 30px 20px;
  }
}