/* css/style.css */
:root {
  --bg-color: #0f172a;
  --card-bg: #1e293b;
  --text-primary: #f8fafc;
  --text-secondary: #94a3b8;
  --accent: #3b82f6;
  --accent-hover: #60a5fa;
  --status-active: #10b981;
  --border-color: #334155;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
}

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

body {
  font-family: 'Inter', sans-serif;
  background-color: var(--bg-color);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

main {
  flex: 1;
}

/* Анимации */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes bounce {
  0%, 20%, 53%, 80%, 100% {
    transform: translate3d(0,0,0);
  }
  40%, 43% {
    transform: translate3d(0,-8px,0);
  }
  70% {
    transform: translate3d(0,-4px,0);
  }
  90% {
    transform: translate3d(0,-2px,0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out;
}

.animate-slide-in-left {
  animation: slideInLeft 0.6s ease-out;
}

.animate-pulse {
  animation: pulse 2s infinite;
}

.animate-bounce {
  animation: bounce 2s infinite;
}

/* Header */
.header {
  background-color: rgba(15, 23, 42, 0.9);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: all 0.3s ease;
}

.header.scrolled {
  background-color: rgba(15, 23, 42, 0.95);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 1.25rem;
  transition: transform 0.3s ease;
  text-decoration: none;
  color: var(--text-primary);
}

.logo:hover {
  transform: scale(1.05);
}

.logo-icon {
  display: inline-flex;
  width: 32px;
  height: 32px;
  background-color: var(--accent);
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  transition: all 0.3s ease;
}

.logo:hover .logo-icon {
  background-color: var(--accent-hover);
  transform: rotate(5deg);
}

.nav {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s ease;
  font-weight: 500;
  position: relative;
  padding: 0.5rem 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent);
  transition: width 0.3s ease;
}

.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.auth-link {
  background-color: var(--accent);
  color: white;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  transition: all 0.3s ease;
  text-decoration: none;
}

.auth-link:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 500;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 0.9rem;
  text-align: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

.btn-primary {
  background-color: var(--accent);
  color: white;
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--text-secondary);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-text {
  background: transparent;
  color: var(--text-secondary);
  padding: 0.5rem;
}

.btn-text:hover {
  color: var(--text-primary);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-primary);
}

.btn-outline:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.btn-full {
  width: 100%;
}

/* Hero section */
.hero {
  padding: 4rem 0;
  background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 80%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 20%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-text {
  animation: fadeInUp 0.8s ease-out;
}

.hero-title {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, var(--text-primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1.2;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-image {
  display: flex;
  justify-content: center;
  animation: slideInLeft 0.8s ease-out;
}

.code-preview {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  width: 100%;
  max-width: 400px;
  position: relative;
  overflow: hidden;
}

.code-preview::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), #8b5cf6);
}

.code-preview pre {
  margin: 0;
  color: var(--text-primary);
  font-family: 'Courier New', monospace;
  font-size: 0.9rem;
}

/* Sections */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 1rem;
  animation: fadeInUp 0.6s ease-out;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto 3rem;
  animation: fadeInUp 0.6s ease-out 0.2s both;
}

/* Advantages */
.advantages {
  padding: 4rem 0;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.advantage-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  border: 1px solid var(--border-color);
  text-align: center;
  transition: all 0.3s ease;
  animation: fadeInUp 0.6s ease-out;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

.advantage-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--accent);
  transition: all 0.3s ease;
}

.advantage-card:hover .advantage-icon {
  transform: scale(1.1);
  color: var(--accent-hover);
}

.advantage-card h3 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  transition: color 0.3s ease;
}

.advantage-card:hover h3 {
  color: var(--accent);
}

.advantage-card p {
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

/* About section */
.about {
  padding: 4rem 0;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.about-text {
  animation: fadeInUp 0.8s ease-out;
}

.stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
  animation: fadeInUp 0.8s ease-out 0.4s both;
}

.stat {
  text-align: center;
  transition: transform 0.3s ease;
}

.stat:hover {
  transform: scale(1.05);
}

.stat-number {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
  transition: color 0.3s ease;
}

.stat:hover .stat-number {
  color: var(--accent-hover);
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.about-image {
  display: flex;
  justify-content: center;
  animation: slideInLeft 0.8s ease-out;
}

.teacher-photo {
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 4rem;
  font-weight: 700;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.teacher-photo:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.teacher-photo::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.1), transparent);
  transform: rotate(45deg);
  transition: all 0.6s ease;
}

.teacher-photo:hover::before {
  transform: rotate(45deg) translate(50%, 50%);
}

/* Pricing */
.pricing {
  padding: 4rem 0;
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.pricing-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  border: 1px solid var(--border-color);
  position: relative;
  text-align: center;
  transition: all 0.3s ease;
  animation: fadeInUp 0.6s ease-out;
}

.pricing-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.pricing-card.featured {
  border-color: var(--accent);
  transform: scale(1.05);
  animation: pulse 3s infinite;
}

.pricing-card.featured:hover {
  transform: scale(1.08);
}

.badge {
  position: absolute;
  top: -10px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--accent);
  color: white;
  padding: 0.25rem 1rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  animation: bounce 2s infinite;
}

.pricing-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  transition: color 0.3s ease;
}

.pricing-card:hover h3 {
  color: var(--accent);
}

.price {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--accent);
  transition: color 0.3s ease;
}

.pricing-card:hover .price {
  color: var(--accent-hover);
}

.features {
  list-style: none;
  margin-bottom: 2rem;
  text-align: left;
}

.features li {
  padding: 0.5rem 0;
  color: var(--text-secondary);
  position: relative;
  padding-left: 1.5rem;
  transition: color 0.3s ease;
}

.features li:before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--success);
  transition: color 0.3s ease;
}

.pricing-card:hover .features li {
  color: var(--text-primary);
}

.pricing-card:hover .features li:before {
  color: var(--accent);
}

/* Blog preview */
.blog-preview {
  padding: 4rem 0;
}

.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.blog-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

.blog-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
  transition: color 0.3s ease;
}

.blog-card:hover h3 {
  color: var(--accent);
}

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

.read-more {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.read-more:hover {
  color: var(--accent-hover);
}

/* Footer */
.footer {
  background-color: var(--card-bg);
  border-top: 1px solid var(--border-color);
  padding: 3rem 0 1rem;
  margin-top: auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-section h4 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.footer-section p {
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}

.footer-section a {
  display: block;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 0.5rem;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: var(--text-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
  color: var(--text-secondary);
}

/* Auth pages */
.auth-page {
  height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  padding: 2rem;
  background-color: var(--bg-color);
}

.auth-container {
  width: 100%;
  max-width: 450px;
}

.auth-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  width: 100%;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
}

.auth-header {
  background-color: rgba(15, 23, 42, 0.5);
  padding: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.status-indicator {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.status-dot {
  width: 8px;
  height: 8px;
  background-color: var(--status-active);
  border-radius: 50%;
}

.auth-body {
  padding: 2rem 1.5rem;
}

.auth-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-align: center;
}

.auth-form {
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border-radius: 6px;
  border: 1px solid var(--border-color);
  background-color: rgba(15, 23, 42, 0.5);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  transition: border-color 0.3s ease;
}

.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.auth-divider {
  display: flex;
  align-items: center;
  margin: 1.5rem 0;
  color: var(--text-secondary);
}

.auth-divider::before, .auth-divider::after {
  content: "";
  flex: 1;
  border-bottom: 1px solid var(--border-color);
}

.auth-divider span {
  padding: 0 1rem;
}

.auth-links {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.info-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  background-color: rgba(51, 65, 85, 0.4);
  padding: 1rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}

.info-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  background-color: rgba(59, 130, 246, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}

.info-content {
  flex: 1;
}

.info-title {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.info-description {
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* Catalog page */
.catalog-header {
  padding: 3rem 0 1rem;
}

.catalog-filters {
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border-color);
}

.catalog-filters .container {
  display: flex;
  gap: 1rem;
  align-items: end;
  flex-wrap: wrap;
}

.filter-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  flex: 1;
  min-width: 150px;
}

.filter-group label {
  font-size: 0.875rem;
  font-weight: 500;
}

.tasks-grid {
  padding: 2rem 0;
}

.tasks-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.task-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
  cursor: pointer;
  animation: fadeInUp 0.6s ease-out;
}

.task-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

.task-header {
  display: flex;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.task-type {
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 600;
}

.task-type.oge {
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--success);
}

.task-type.ege {
  background-color: rgba(59, 130, 246, 0.2);
  color: var(--accent);
}

.task-type.programming {
  background-color: rgba(139, 92, 246, 0.2);
  color: #8b5cf6;
}

.task-difficulty {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: rgba(245, 158, 11, 0.2);
  color: var(--warning);
  font-size: 0.75rem;
  font-weight: 600;
}

.task-title {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.task-description {
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.task-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.task-topic {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 1rem;
}

.page-info {
  color: var(--text-secondary);
}

.no-results {
  text-align: center;
  padding: 3rem;
  grid-column: 1 / -1;
  color: var(--text-secondary);
}

.no-results-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

.no-results h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.no-results p {
  color: var(--text-secondary);
}

/* Profile page */
.profile-header {
  padding: 2rem 0;
  background-color: var(--card-bg);
  border-bottom: 1px solid var(--border-color);
}

.profile-info {
  display: flex;
  gap: 2rem;
  align-items: center;
}

.avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.5rem;
  font-weight: 700;
  flex-shrink: 0;
}

.profile-details h1 {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

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

.profile-stats {
  display: flex;
  gap: 2rem;
}

.profile-content {
  padding: 2rem 0;
}

.profile-grid {
  display: grid;
  grid-template-columns: 250px 1fr;
  gap: 2rem;
}

.profile-sidebar {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.profile-nav {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.profile-nav-link {
  padding: 0.75rem 1rem;
  border-radius: 6px;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
}

.profile-nav-link:hover, .profile-nav-link.active {
  background-color: rgba(59, 130, 246, 0.1);
  color: var(--accent);
  border-left-color: var(--accent);
}

.telegram-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

.telegram-card h3 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

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

.link-code {
  background-color: rgba(15, 23, 42, 0.5);
  padding: 0.75rem;
  border-radius: 6px;
  margin-bottom: 1rem;
  text-align: center;
  font-family: monospace;
  color: var(--text-primary);
}

.telegram-instruction {
  font-size: 0.875rem;
  margin-top: 1rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.profile-main {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

.profile-section {
  display: none;
}

.profile-section.active {
  display: block;
}

.progress-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.progress-card {
  background-color: rgba(15, 23, 42, 0.5);
  border-radius: 8px;
  padding: 1.5rem;
  border: 1px solid var(--border-color);
}

.progress-card h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.progress-bar {
  height: 8px;
  background-color: var(--border-color);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.progress-fill {
  height: 100%;
  background-color: var(--accent);
  border-radius: 4px;
  transition: width 0.5s ease;
}

.progress-text {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.recent-activity h3 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.activity-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.activity-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.activity-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: rgba(16, 185, 129, 0.2);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.activity-details p {
  margin-bottom: 0.25rem;
  color: var(--text-primary);
}

.activity-time {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Модальное окно */
.modal {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background-color: var(--card-bg);
  margin: 5% auto;
  padding: 2rem;
  border-radius: 12px;
  width: 90%;
  max-width: 500px;
  position: relative;
  border: 1px solid var(--border-color);
  animation: slideInLeft 0.3s ease;
}

.close {
  position: absolute;
  top: 1rem;
  right: 1.5rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-secondary);
  transition: color 0.3s ease;
}

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

/* Стили для страницы "Обо мне" */
.about-page {
  padding: 4rem 0;
}

.about-content {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  align-items: start;
}

.teacher-photo-large {
  width: 250px;
  height: 250px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 4rem;
  margin: 0 auto;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.teacher-photo-large:hover {
  transform: scale(1.05);
  box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.about-text h1 {
  font-size: 2.5rem;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.about-details {
  margin-bottom: 2rem;
}

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

.about-section h2 {
  margin-bottom: 1rem;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.about-section ul {
  list-style: none;
  padding-left: 0;
}

.about-section li {
  margin-bottom: 0.5rem;
  position: relative;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.about-section li:before {
  content: "•";
  color: var(--accent);
  position: absolute;
  left: 0;
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
  margin: 3rem 0;
}

.stat-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: all 0.3s ease;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

.stat-icon {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.stat-number {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.5rem;
}

.stat-label {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

.cta-section {
  background-color: var(--card-bg);
  border-radius: 12px;
  padding: 2rem;
  border: 1px solid var(--border-color);
  text-align: center;
  margin-top: 3rem;
}

.cta-section h2 {
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.cta-section p {
  color: var(--text-secondary);
  margin-bottom: 2rem;
}

.cta-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Уведомления */
.notification {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--success);
  color: white;
  padding: 1rem 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  z-index: 10000;
  animation: slideInRight 0.3s ease;
  max-width: 400px;
}

.notification-error {
  background: var(--danger);
}

.notification-warning {
  background: var(--warning);
}

.notification-info {
  background: var(--accent);
}

@keyframes slideInRight {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

@keyframes slideOutRight {
  from {
    transform: translateX(0);
    opacity: 1;
  }
  to {
    transform: translateX(100%);
    opacity: 0;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hero-content, .about-content {
    grid-template-columns: 1fr;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .nav {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .profile-grid {
    grid-template-columns: 1fr;
  }
  
  .profile-info {
    flex-direction: column;
    text-align: center;
  }
  
  .profile-stats {
    justify-content: center;
  }
  
  .catalog-filters .container {
    flex-direction: column;
    align-items: stretch;
  }
  
  .pricing-card.featured {
    transform: scale(1);
  }
  
  .pricing-card.featured:hover {
    transform: scale(1.02);
  }
  
  .about-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .about-image {
    order: -1;
  }
  
  .cta-actions {
    flex-direction: column;
  }
  
  .stats {
    flex-direction: column;
    gap: 1rem;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .modal-content {
    margin: 10% auto;
    width: 95%;
    padding: 1.5rem;
  }
}
/* Стили для страницы блога */
.blog-header {
  padding: 3rem 0 1rem;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--card-bg) 100%);
}

.blog-content {
  padding: 2rem 0 4rem;
}

.blog-posts {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.blog-post-card {
  background-color: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: all 0.3s ease;
  animation: fadeInUp 0.6s ease-out;
}

.blog-post-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  border-color: var(--accent);
}

.post-image {
  height: 200px;
  background: linear-gradient(135deg, var(--accent), #8b5cf6);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.image-placeholder {
  color: white;
  font-size: 3rem;
  opacity: 0.8;
}

.post-content {
  padding: 1.5rem;
}

.post-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.post-date, .post-category {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.post-title {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  line-height: 1.4;
  transition: color 0.3s ease;
}

.blog-post-card:hover .post-title {
  color: var(--accent);
}

.post-excerpt {
  color: var(--text-secondary);
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

.post-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.read-more {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: color 0.3s ease;
}

.read-more:hover {
  color: var(--accent-hover);
}

.read-time {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-numbers {
  display: flex;
  gap: 0.5rem;
}

.page-number {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background-color: var(--card-bg);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.3s ease;
  border: 1px solid var(--border-color);
}

.page-number:hover {
  border-color: var(--accent);
  color: var(--text-primary);
}

.page-number.active {
  background-color: var(--accent);
  color: white;
  border-color: var(--accent);
}

/* Стили для отдельных страниц статей */
.post-header {
  padding: 3rem 0 2rem;
  background: linear-gradient(135deg, var(--bg-color) 0%, var(--card-bg) 100%);
}

.post-header .container {
  max-width: 800px;
}

.post-title-large {
  font-size: 2.5rem;
  margin-bottom: 1rem;
  line-height: 1.3;
}

.post-meta-large {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  color: var(--text-secondary);
}

.post-content-single {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 0 4rem;
}

.post-content-single h2 {
  font-size: 1.75rem;
  margin: 2rem 0 1rem;
  color: var(--text-primary);
}

.post-content-single h3 {
  font-size: 1.5rem;
  margin: 1.5rem 0 1rem;
  color: var(--text-primary);
}

.post-content-single p {
  margin-bottom: 1.5rem;
  line-height: 1.7;
  color: var(--text-secondary);
}

.post-content-single ul, .post-content-single ol {
  margin-bottom: 1.5rem;
  padding-left: 2rem;
}

.post-content-single li {
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.post-content-single code {
  background-color: rgba(59, 130, 246, 0.1);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  color: var(--accent);
}

.post-content-single pre {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 1.5rem;
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

.post-content-single pre code {
  background: none;
  padding: 0;
  color: var(--text-primary);
}

.post-navigation {
  display: flex;
  justify-content: space-between;
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border-color);
}

.nav-link-post {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.nav-link-post.prev {
  margin-right: auto;
}

.nav-link-post.next {
  margin-left: auto;
}

@media (max-width: 768px) {
  .blog-posts {
    grid-template-columns: 1fr;
  }
  
  .post-meta {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .post-footer {
    flex-direction: column;
    gap: 1rem;
    align-items: flex-start;
  }
  
  .post-title-large {
    font-size: 2rem;
  }
  
  .post-meta-large {
    flex-direction: column;
    gap: 0.5rem;
  }
  
  .post-navigation {
    flex-direction: column;
    gap: 1rem;
  }
  
  .nav-link-post {
    justify-content: space-between;
  }
}
/* css/style.css - дополнительные стили */

/* Стили для админ-панели */
.admin-container {
    background-color: var(--bg-color);
    min-height: 100vh;
}

.admin-header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
}

.admin-sidebar {
    background: var(--card-bg);
    border-right: 1px solid var(--border-color);
    min-height: calc(100vh - 80px);
    padding: 2rem 0;
}

.admin-main {
    padding: 2rem;
    min-height: calc(100vh - 80px);
}

/* Стили для таблиц */
.table {
    width: 100%;
    border-collapse: collapse;
    background: var(--card-bg);
    border-radius: 12px;
    overflow: hidden;
}

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

.table th {
    background: var(--bg-secondary);
    font-weight: 600;
    color: var(--text-secondary);
}

/* Стили для бейджей */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.badge-warning {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.badge-danger {
    background: rgba(239, 68, 68, 0.2);
    color: var(--danger);
}

.badge-info {
    background: rgba(59, 130, 246, 0.2);
    color: var(--accent);
}

/* Стили для страницы "Обо мне" */
.about-hero {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    color: white;
}

.about-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 4rem;
    align-items: center;
}

.avatar-large {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    font-weight: bold;
    border: 4px solid white;
}

.about-stats {
    display: flex;
    gap: 2rem;
    margin: 2rem 0;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.feature {
    text-align: center;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
}

.feature i {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: var(--accent-light);
}

.education-section,
.certificates-section {
    padding: 4rem 0;
}

.education-list {
    margin-top: 2rem;
}

.education-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 2rem;
    padding: 2rem 0;
    border-bottom: 1px solid var(--border-color);
}

.education-year {
    font-weight: bold;
    color: var(--accent);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.certificate-card {
    padding: 2rem;
    background: var(--card-bg);
    border-radius: 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.certificate-card i {
    font-size: 3rem;
    color: var(--accent);
    margin-bottom: 1rem;
}

/* Адаптивность */
@media (max-width: 768px) {
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .about-stats {
        justify-content: center;
    }
    
    .education-item {
        grid-template-columns: 1fr;
    }
    
    .admin-layout {
        grid-template-columns: 1fr !important;
    }
    
    .admin-sidebar {
        min-height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
}
/* Дополнительные стили для профиля */
.profile-nav-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
    margin-bottom: 0.25rem;
}

.profile-nav-link:hover,
.profile-nav-link.active {
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--accent);
}

.profile-section {
    display: none;
}

.profile-section.active {
    display: block;
}

.telegram-form {
    margin: 1rem 0;
}

.telegram-form .form-group {
    margin-bottom: 1rem;
}

.favorites-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.history-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
}

.history-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 1rem;
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 0.5rem;
}

.history-header h3 {
    margin: 0;
    font-size: 1.1rem;
    flex: 1;
}

.history-score {
    background: var(--success);
    color: white;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.875rem;
    font-weight: bold;
    margin-left: 1rem;
}

.history-details {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    flex-wrap: wrap;
}

.no-data {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem;
    font-style: italic;
}
/* Дополнительные стили для админ-панели */
.admin-layout {
    display: grid;
    grid-template-columns: 250px 1fr;
    gap: 0;
}

.tab-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.search-box {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.search-box input {
    flex: 1;
    min-width: 200px;
}

.action-buttons {
    display: flex;
    gap: 0.25rem;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 2rem;
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 1rem;
}

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

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-color);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 768px) {
    .admin-layout {
        grid-template-columns: 1fr;
    }
    
    .admin-sidebar {
        position: static;
        width: 100%;
        min-height: auto;
    }
    
    .admin-main {
        margin-left: 0;
    }
    
    .tab-header {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .modal-content {
        margin: 10% auto;
        width: 95%;
        padding: 1rem;
    }
}