:root {
  --primary: #8A2BE2;
  --primary-dark: #6A1B9A;
  --secondary: #00D8FF;
  --dark-bg: #121212;
  --light-bg: #1E1E1E;
  --text: #F5F5F5;
  --text-secondary: #B0B0B0;
  --accent: #FF6B6B;
  --accent-dark: #FF4757;
  --danger: #FF5252;
  --success: #4CAF50;
  --warning: #FFC107;
  --info: #2196F3;
  --card-bg: #252525;
  --card-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

@font-face {
  font-family: 'Pixel';
  src: url('https://fonts.googleapis.com/css2?family=Press+Start+2P&display=swap');
}

body {
  background-color: var(--dark-bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.6;
  padding: 20px;
  min-height: 100vh;
  background-image: 
    radial-gradient(circle at 10% 20%, rgba(138, 43, 226, 0.15) 0%, transparent 30%),
    radial-gradient(circle at 90% 80%, rgba(0, 216, 255, 0.15) 0%, transparent 30%);
}

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

/* Вкладки */
.tabs {
  display: flex;
  margin-bottom: 30px;
  justify-content: center;
  gap: 10px;
}

.tab-button {
  background: none;
  border: none;
  padding: 12px 24px;
  color: var(--text-secondary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-size: 15px;
  border-radius: 8px;
  letter-spacing: 0.5px;
  position: relative;
  z-index: 1;
}

.tab-button:hover {
  color: var(--text);
  background: rgba(138, 43, 226, 0.1);
}

.tab-button.active {
  color: var(--text);
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  box-shadow: 0 4px 15px rgba(138, 43, 226, 0.4);
}

/* Контент вкладок */
.tab-content {
  display: none;
  width: 100%;
  animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.tab-content.active {
  display: flex;
  justify-content: center;
}

/* Игровые контейнеры */
.game-container {
  background: var(--card-bg);
  border-radius: 16px;
  padding: 30px;
  margin-bottom: 30px;
  box-shadow: var(--card-shadow);
  max-width: 1200px;
  width: 100%;
  border: 1px solid rgba(138, 43, 226, 0.2);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.game-container::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
}

h1 {
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 20px;
  text-align: center;
  letter-spacing: 1px;
  position: relative;
  display: inline-block;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 2px 10px rgba(138, 43, 226, 0.3);
}

.subtitle {
  text-align: center;
  color: var(--text-secondary);
  margin-bottom: 25px;
  font-size: 1.1rem;
}

.markov-info {
  text-align: center;
  margin-bottom: 25px;
  padding: 15px;
  background: rgba(138, 43, 226, 0.1);
  border-radius: 12px;
  border-left: 4px solid var(--primary);
  font-size: 1rem;
  backdrop-filter: blur(5px);
}

/* Игровое поле */
canvas {
  background: #121212;
  border-radius: 12px;
  display: block;
  margin: 0 auto 25px;
  max-width: 100%;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(138, 43, 226, 0.3);
  transition: var(--transition);
}

/* Информация о игре */
.game-info {
  display: flex;
  gap: 30px;
  margin: 15px 0;
  margin-left: 20%;
  font-size: 1.1rem;
}

.game-info div {
  background: rgba(0, 0, 0, 0.3);
  padding: 12px 30px;
  border-radius: 50px;
  border: 1px solid rgba(138, 43, 226, 0.3);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(5px);
}

/* Кнопки управления */
.controls {
  display: flex;
  gap: 15px;
  margin-bottom: 25px;
  justify-content: center;
  flex-wrap: wrap;
}

button {
  background: linear-gradient(to bottom, rgba(138, 43, 226, 0.2), rgba(106, 27, 154, 0.1));
  border: none;
  color: var(--text);
  padding: 12px 24px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: var(--transition);
  letter-spacing: 0.5px;
  position: relative;
  overflow: hidden;
  min-width: 120px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  border: 1px solid rgba(138, 43, 226, 0.3);
  backdrop-filter: blur(5px);
}

button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(138, 43, 226, 0.3);
  background: linear-gradient(to bottom, rgba(138, 43, 226, 0.3), rgba(106, 27, 154, 0.2));
}

button:active {
  transform: translateY(1px);
}

/* Обертка для игры */
.game-wrapper {
  display: flex;
  gap: 30px;
  align-items: flex-start;
}

.game-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Блок с правилами */
.rules {
  width: 400px;
  background: rgba(30, 30, 30, 0.7);
  padding: 25px;
  border-radius: 12px;
  border-left: 4px solid var(--accent);
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(5px);
  transition: var(--transition);
}

.rules h3 {
  color: var(--accent);
  margin-bottom: 20px;
  font-size: 1.3rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.rules h3::before {
  content: '✨';
}

.rules ul {
  list-style-type: none;
  padding-left: 0;
}

.rules li {
  margin-bottom: 15px;
  padding-left: 30px;
  position: relative;
  color: var(--text-secondary);
  line-height: 1.6;
  font-size: 0.95rem;
}

.rules li::before {
  content: '•';
  color: var(--accent);
  position: absolute;
  left: 10px;
  font-size: 1.5rem;
  line-height: 1;
}

/* Секция теории */
.theory-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

.theory-section {
  margin-bottom: 40px;
  background: var(--card-bg);
  padding: 30px;
  border-radius: 16px;
  box-shadow: var(--card-shadow);
  border-left: 4px solid var(--primary);
  transition: var(--transition);
}

.theory-section h2 {
  color: var(--text);
  margin-bottom: 25px;
  font-size: 1.5rem;
  position: relative;
  padding-left: 25px;
}

.theory-section p {
  margin-bottom: 20px;
  color: var(--text-secondary);
  line-height: 1.7;
  font-size: 1rem;
}

/* Визуальные примеры */
.visual-example {
  background: rgba(30, 30, 30, 0.7);
  border-radius: 12px;
  padding: 25px;
  margin: 30px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  border: 1px dashed rgba(138, 43, 226, 0.3);
  backdrop-filter: blur(5px);
}

.states {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

.state {
  padding: 15px 30px;
  border-radius: 10px;
  background: linear-gradient(135deg, hsl(var(--hue), 80%, 60%), hsl(var(--hue), 80%, 40%));
  font-weight: bold;
  color: white;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
  min-width: 120px;
  text-align: center;
  transition: var(--transition);
}

.arrow {
  width: 60px;
  height: 4px;
  background: var(--secondary);
  margin: 0 20px;
  position: relative;
  transition: var(--transition);
}

.arrow::after {
  content: '';
  position: absolute;
  right: -6px;
  top: -6px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 8px 0 8px 12px;
  border-color: transparent transparent transparent var(--secondary);
}

.probabilities {
  display: flex;
  justify-content: space-between;
  width: 100%;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

/* Интерактивная модель */
.interactive-model {
  margin: 40px 0;
}

.model-step {
  display: flex;
  margin-bottom: 30px;
  background: rgba(30, 30, 30, 0.7);
  border-radius: 16px;
  padding: 25px;
  border-left: 4px solid var(--primary);
  align-items: center;
  transition: var(--transition);
}

.step-number {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  margin-right: 25px;
  flex-shrink: 0;
  box-shadow: 0 6px 20px rgba(138, 43, 226, 0.3);
  font-size: 1.2rem;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  color: var(--text);
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.prob-bar {
  display: flex;
  height: 50px;
  width: 100%;
  margin: 20px 0;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: inset 0 4px 10px rgba(0, 0, 0, 0.3);
  background: rgba(0, 0, 0, 0.2);
}

.prob-segment {
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 0.9rem;
  background: linear-gradient(to bottom, hsl(var(--color), 80%, 60%), hsl(var(--color), 80%, 40%));
  width: calc(var(--prob) * 1%);
  transition: width 0.5s ease;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
  position: relative;
  overflow: hidden;
}

.prob-segment::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0));
}

.hint {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 15px;
  font-style: italic;
}

/* Особенности */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  margin: 40px 0;
}

.feature {
  background: rgba(138, 43, 226, 0.1);
  padding: 30px;
  border-radius: 16px;
  border: 1px solid rgba(138, 43, 226, 0.2);
  transition: var(--transition);
  backdrop-filter: blur(5px);
}

.feature-icon {
  font-size: 2.5rem;
  margin-bottom: 20px;
  color: var(--primary);
  transition: var(--transition);
}

.feature h3 {
  color: var(--text);
  margin-bottom: 15px;
  font-size: 1.2rem;
}

.feature p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Примеры из реальной жизни */
.real-world {
  background: rgba(255, 107, 107, 0.1);
  padding: 30px;
  border-radius: 16px;
  margin: 40px 0;
  border-left: 4px solid var(--accent);
  transition: var(--transition);
}

.real-world h3 {
  color: var(--text);
  margin-bottom: 20px;
  font-size: 1.3rem;
}

.real-world p {
  color: var(--text-secondary);
  margin-bottom: 20px;
  font-size: 1rem;
}

.real-world ul {
  list-style: none;
  padding-left: 0;
}

.real-world li {
  margin-bottom: 15px;
  padding-left: 35px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

.real-world li::before {
  content: '→';
  position: absolute;
  left: 10px;
  color: var(--accent);
  font-weight: bold;
  font-size: 1.2rem;
}

/* Призыв к действию */
.try-it {
  text-align: center;
  margin-top: 60px;
  padding: 50px;
  background: linear-gradient(135deg, rgba(138, 43, 226, 0.1), rgba(0, 216, 255, 0.1));
  border-radius: 16px;
  border: 2px dashed var(--primary);
  transition: var(--transition);
}

.try-it:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(138, 43, 226, 0.2);
}

.try-it h2 {
  color: var(--text);
  margin-bottom: 20px;
  font-size: 1.8rem;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.try-it p {
  color: var(--text-secondary);
  margin-bottom: 15px;
  font-size: 1.1rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.cta-button {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  font-weight: bold;
  padding: 18px 50px;
  border-radius: 50px;
  margin-top: 25px;
  border: none;
  box-shadow: 0 8px 25px rgba(138, 43, 226, 0.3);
  transition: var(--transition);
  font-size: 1.1rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.cta-button::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: 0.5s;
}

.cta-button:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 30px rgba(138, 43, 226, 0.4);
}

.cta-button:hover::before {
  left: 100%;
}

/* Адаптивность */
@media (max-width: 992px) {
  .game-wrapper {
    flex-direction: column;
  }
  
  .rules {
    width: 100%;
    margin-top: 30px;
  }
}

@media (max-width: 768px) {
  .tabs {
    flex-wrap: wrap;
    border-radius: 12px;
  }
  
  .tab-button {
    padding: 10px 20px;
    font-size: 14px;
  }
  
  h1 {
    font-size: 1.8rem;
  }
  
  .theory-section {
    padding: 25px;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .try-it {
    padding: 30px;
  }
}

@media (max-width: 576px) {
  body {
    padding: 15px;
  }
  
  .game-container {
    padding: 20px;
  }
  
  h1 {
    font-size: 1.5rem;
  }
  
  .model-step {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .step-number {
    margin-bottom: 20px;
  }
  
  .game-info {
    flex-direction: column;
    gap: 15px;
  }
  
  .controls {
    flex-direction: column;
    align-items: center;
  }
  
  button {
    width: 100%;
    max-width: 200px;
  }
}

/* Theory Tab Styles */
.theory-header {
    text-align: center;
    margin-bottom: 40px;
}

.header-decoration {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
}

.decoration-circle {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

.decoration-line {
    width: 100px;
    height: 2px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    margin: 0 15px;
}

.theory-intro {
    margin-bottom: 50px;
}

.intro-card {
    background: rgba(138, 43, 226, 0.1);
    border-radius: 16px;
    padding: 25px;
    display: flex;
    align-items: center;
    border-left: 4px solid var(--primary);
    backdrop-filter: blur(5px);
}

.intro-icon {
    font-size: 2.5rem;
    margin-right: 20px;
}

.section-header {
    display: flex;
    align-items: center;
    margin-bottom: 30px;
}

.section-number {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-right: 20px;
    font-size: 1.2rem;
}

.definition-card {
    display: flex;
    background: var(--card-bg);
    border-radius: 16px;
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: var(--card-shadow);
}

.definition-content {
    flex: 1;
    padding: 30px;
}

.definition-visual {
    flex: 1;
    padding: 30px;
    background: rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.math-formula {
    background: rgba(0, 0, 0, 0.3);
    padding: 15px;
    border-radius: 8px;
    font-family: monospace;
    font-size: 1.1rem;
    margin-top: 20px;
    text-align: center;
    border-left: 4px solid var(--secondary);
}

.state-diagram {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.state {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 15px 25px;
    border-radius: 8px;
    font-weight: bold;
}

.arrow {
    width: 40px;
    height: 3px;
    background: var(--secondary);
    margin: 0 10px;
    position: relative;
}

.arrow::after {
    content: '';
    position: absolute;
    right: -5px;
    top: -4px;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 6px 0 6px 10px;
    border-color: transparent transparent transparent var(--secondary);
}

.probabilities {
    display: flex;
    justify-content: space-around;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.snake-application {
    margin-top: 50px;
}

.application-steps {
    display: flex;
    gap: 20px;
    margin-top: 30px;
}

.step {
    flex: 1;
    background: rgba(30, 30, 30, 0.7);
    border-radius: 12px;
    padding: 25px;
    transition: var(--transition);
    border: 1px solid rgba(138, 43, 226, 0.2);
}

.step-icon {
    font-size: 2rem;
    margin-bottom: 15px;
}

.state-example {
    font-family: monospace;
    background: rgba(0, 0, 0, 0.3);
    padding: 8px 12px;
    border-radius: 6px;
    margin-top: 10px;
    display: inline-block;
}

.state-var {
    color: var(--secondary);
}

.directions {
    display: flex;
    gap: 10px;
    margin-top: 10px;
}

.direction {
    width: 30px;
    height: 30px;
    background: rgba(138, 43, 226, 0.2);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
}

.learning-process {
    margin-top: 40px;
}

.process-step {
    display: flex;
    margin-bottom: 30px;
    align-items: center;
    background: rgba(30, 30, 30, 0.7);
    border-radius: 16px;
    padding: 25px;
    gap: 30px;
}

.step-visual {
    width: 120px;
    height: 120px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    font-size: 2.5rem;
}

.success {
    background: rgba(76, 175, 80, 0.1);
    border: 2px solid rgba(76, 175, 80, 0.3);
}

.failure {
    background: rgba(255, 82, 82, 0.1);
    border: 2px solid rgba(255, 82, 82, 0.3);
}

.apple-bonus {
    background: rgba(255, 193, 7, 0.1);
    border: 2px solid rgba(255, 193, 7, 0.3);
}

.result-icon {
    position: absolute;
    top: 5px;
    right: 5px;
    font-size: 1.5rem;
}

.distance-arrow {
    position: absolute;
    right: 15px;
    font-size: 2rem;
}

.prob-change {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 15px;
    font-weight: bold;
}

.prob-before {
    background: rgba(0, 0, 0, 0.3);
    padding: 5px 10px;
    border-radius: 6px;
}

.prob-after {
    padding: 5px 10px;
    border-radius: 6px;
}

.positive {
    background: rgba(76, 175, 80, 0.3);
    color: #4CAF50;
}

.negative {
    background: rgba(255, 82, 82, 0.3);
    color: #FF5252;
}

.bonus {
    font-size: 0.8rem;
    color: var(--warning);
    margin-left: 10px;
}

.interactive-model {
    margin-top: 50px;
    background: var(--card-bg);
    padding: 30px;
    border-radius: 16px;
    box-shadow: var(--card-shadow);
}

.model-controls {
    display: flex;
    gap: 15px;
    margin: 20px 0;
    justify-content: center;
}

.model-btn {
    padding: 12px 20px;
    border-radius: 8px;
    border: none;
    font-weight: bold;
    cursor: pointer;
    transition: var(--transition);
}

.success-btn {
    background: rgba(76, 175, 80, 0.2);
    color: #4CAF50;
}

.success-btn:hover {
    background: rgba(76, 175, 80, 0.3);
}

.failure-btn {
    background: rgba(255, 82, 82, 0.2);
    color: #FF5252;
}

.failure-btn:hover {
    background: rgba(255, 82, 82, 0.3);
}

.reset-btn {
    background: rgba(33, 150, 243, 0.2);
    color: var(--info);
}

.reset-btn:hover {
    background: rgba(33, 150, 243, 0.3);
}

.prob-bar-model {
    display: flex;
    height: 60px;
    width: 100%;
    margin: 20px 0;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: inset 0 4px 10px rgba(0, 0, 0, 0.3);
    background: rgba(0, 0, 0, 0.2);
}

.model-state {
    text-align: center;
    margin-top: 20px;
    color: var(--text-secondary);
}

.state-value {
    color: var(--text);
    font-weight: bold;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.advantage-card {
    background: rgba(138, 43, 226, 0.1);
    padding: 30px;
    border-radius: 16px;
    transition: var(--transition);
    border: 1px solid rgba(138, 43, 226, 0.2);
}

.advantage-icon {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.real-applications {
    margin-top: 50px;
}

.applications-timeline {
    margin-top: 40px;
    position: relative;
    padding-left: 30px;
}

.timeline-item {
    position: relative;
    padding-bottom: 30px;
    display: flex;
    align-items: flex-start;
}

.timeline-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    margin-right: 20px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.timeline-content {
    background: rgba(30, 30, 30, 0.7);
    padding: 20px;
    border-radius: 12px;
    flex: 1;
}

.try-it-out {
    text-align: center;
    margin-top: 80px;
    padding: 50px;
    background: linear-gradient(135deg, rgba(138, 43, 226, 0.1), rgba(0, 216, 255, 0.1));
    border-radius: 16px;
    border: 2px dashed var(--primary);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
}

.cta-button .arrow {
    transition: transform 0.3s ease;
}

.cta-button:hover .arrow {
    transform: translateX(5px);
}

@media (max-width: 768px) {
    .definition-card {
        flex-direction: column;
    }
    
    .application-steps {
        flex-direction: column;
    }
    
    .process-step {
        flex-direction: column;
        text-align: center;
    }
    
    .model-controls {
        flex-wrap: wrap;
    }
}