:root {
  --primary: #2563EB;
  --primary-dark: #1E40AF;
  --secondary: #0EA5E9;
  --accent: #22C55E;
  --text: #0F172A;
  --text-light: #475569;
  --surface: #F8FAFC;
  --white: #FFFFFF;
  --border: #E2E8F0;
  --shadow: rgba(15, 23, 42, 0.08);
  --shadow-lg: rgba(15, 23, 42, 0.15);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --space-xs: 8px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 32px;
  --space-xl: 48px;
  --space-2xl: 64px;
  --space-3xl: 96px;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  transition: var(--transition);
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 0;
  background: var(--primary);
  color: var(--white);
  padding: var(--space-sm);
  z-index: 9999;
  border-radius: var(--radius-md);
}

.skip-link:focus {
  top: var(--space-sm);
  left: var(--space-sm);
  outline: 3px solid var(--accent);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.container-narrow {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 var(--space-md);
}

header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px var(--shadow);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  gap: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary);
}

.logo-img {
  width: 48px;
  height: 48px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: var(--space-xs);
  background: var(--surface);
  border-radius: var(--radius-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: var(--transition);
}

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

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

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

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
}

.nav-menu a {
  font-weight: 500;
  color: var(--text-light);
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--radius-sm);
}

.nav-menu a:hover,
.nav-menu a:focus {
  color: var(--primary);
  background: var(--surface);
}

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

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.hero p {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
  opacity: 0.95;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-md) var(--space-lg);
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: var(--transition);
  font-size: 1rem;
}

.btn:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--white);
  color: var(--primary);
  box-shadow: 0 4px 12px var(--shadow-lg);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px var(--shadow-lg);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: var(--white);
  border: 2px solid var(--white);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
}

.section {
  padding: var(--space-3xl) 0;
}

.section-alt {
  background: var(--surface);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.section-subtitle {
  color: var(--primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  font-size: 0.875rem;
  margin-bottom: var(--space-xs);
}

.section-title {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-md);
  line-height: 1.2;
}

.section-description {
  font-size: 1.125rem;
  color: var(--text-light);
  max-width: 720px;
  margin: 0 auto;
}

.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 {
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.grid-3 {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: 0 2px 8px var(--shadow);
  transition: var(--transition);
  border: 1px solid var(--border);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px var(--shadow-lg);
}

.card-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-md);
  color: var(--white);
  font-size: 1.5rem;
}

.card-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: var(--space-sm);
  color: var(--text);
}

.card-text {
  color: var(--text-light);
  line-height: 1.7;
}

.member-card {
  text-align: center;
}

.member-avatar {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  margin: 0 auto var(--space-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 2.5rem;
  font-weight: 700;
}

.member-name {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.member-title {
  color: var(--primary);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--space-sm);
}

.member-specialty {
  color: var(--text-light);
  font-size: 0.875rem;
}

.breadcrumb {
  padding: var(--space-md) 0;
  background: var(--surface);
}

.breadcrumb ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xs);
  align-items: center;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.875rem;
}

.breadcrumb li:not(:last-child)::after {
  content: '/';
  color: var(--text-light);
  margin-left: var(--space-xs);
}

.breadcrumb a {
  color: var(--primary);
}

.breadcrumb a:hover {
  text-decoration: underline;
}

.breadcrumb li:last-child {
  color: var(--text-light);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  align-items: center;
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
  color: var(--text-light);
}

.article-content {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--text);
}

.article-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin: var(--space-xl) 0 var(--space-md);
  color: var(--text);
}

.article-content h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin: var(--space-lg) 0 var(--space-md);
  color: var(--text);
}

.article-content p {
  margin-bottom: var(--space-md);
}

.article-content ul,
.article-content ol {
  margin: var(--space-md) 0;
  padding-left: var(--space-lg);
}

.article-content li {
  margin-bottom: var(--space-sm);
}

.search-filter {
  background: var(--white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  box-shadow: 0 2px 8px var(--shadow);
  margin-bottom: var(--space-xl);
}

.search-input {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.search-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}

.filter-btn {
  padding: var(--space-sm) var(--space-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font-weight: 500;
  color: var(--text-light);
  background: var(--white);
}

.filter-btn:hover,
.filter-btn:focus {
  border-color: var(--primary);
  color: var(--primary);
}

.filter-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.faq {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-md);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--space-lg);
  font-size: 1.125rem;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
}

.faq-question:hover {
  background: var(--surface);
}

.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.faq-item.active .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

.faq-answer-content {
  padding: 0 var(--space-lg) var(--space-lg);
  color: var(--text-light);
  line-height: 1.7;
}

.back-to-top {
  position: fixed;
  bottom: var(--space-lg);
  right: var(--space-lg);
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  transform: translateY(-4px);
  background: var(--primary-dark);
}

footer {
  background: var(--text);
  color: var(--white);
  padding: var(--space-2xl) 0 var(--space-lg);
}

.footer-content {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer-section h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: var(--space-md);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.8;
}

.footer-section a:hover {
  color: var(--white);
  text-decoration: underline;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-sm);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.875rem;
}

@media (min-width: 640px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 768px) {
  .navbar {
    padding: var(--space-lg) 0;
  }

  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-content {
    grid-template-columns: repeat(4, 1fr);
  }

  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 88px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-md);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 16px var(--shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-menu.active {
    max-height: 500px;
  }

  .nav-menu a {
    padding: var(--space-md);
  }

  .hero {
    padding: var(--space-2xl) 0;
  }

  .section {
    padding: var(--space-2xl) 0;
  }

  .cta-group {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}

.page-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: var(--white);
  padding: var(--space-2xl) 0;
  text-align: center;
}

.page-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  margin-bottom: var(--space-md);
}

.page-description {
  font-size: 1.125rem;
  opacity: 0.95;
  max-width: 720px;
  margin: 0 auto;
}

.contact-grid {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-xl);
}

.contact-card {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: var(--radius-md);
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 1.25rem;
}

.contact-info h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.contact-info p {
  color: var(--text-light);
}

.form-group {
  margin-bottom: var(--space-md);
}

.form-label {
  display: block;
  font-weight: 600;
  margin-bottom: var(--space-xs);
  color: var(--text);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  transition: var(--transition);
}

.form-textarea {
  min-height: 150px;
  resize: vertical;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

@media (min-width: 768px) {
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@keyframes slideIn {
  from {
    transform: translateX(400px);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOut {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(400px);
    opacity: 0;
  }
}

.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 10000;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.lightbox.active {
  display: flex;
}

.lightbox-content {
  position: relative;
  max-width: 90%;
  max-height: 90vh;
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-image {
  max-width: 100%;
  max-height: 70vh;
  border-radius: var(--radius-md);
  display: block;
}

.lightbox-caption {
  margin-top: 16px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  text-align: center;
}

.lightbox-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 40px;
  height: 40px;
  background: var(--primary);
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s ease;
}

.lightbox-close:hover {
  background: var(--secondary);
  transform: rotate(90deg);
}

.gallery-item {
  cursor: pointer;
  transition: transform 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.05);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.lightbox.active .lightbox-content {
  animation: fadeIn 0.3s ease;
}