:root {
  /* Светлая тема */
  --light-bg: #f5f7fa;
  --light-container: #ffffff;
  --light-text: #333333;
  --light-header: #4a6fa5;
  --light-accent: #2c7be5;
  --light-accent-hover: #1c6bd6;
  --light-border: #e0e6ed;
  --light-btn: transparent;
  --light-btn-active: #e8f0fe;
  --light-shadow: rgba(0, 0, 0, 0.08);
  
  /* Темная тема */
  --dark-bg: #1a2332;
  --dark-container: #283142;
  --dark-text: #e4e7eb;
  --dark-header: #3a506b;
  --dark-accent: #4d96ff;
  --dark-accent-hover: #3d86ff;
  --dark-border: #3a4556;
  --dark-btn: transparent;
  --dark-btn-active: rgba(77, 150, 255, 0.15);
  --dark-shadow: rgba(0, 0, 0, 0.2);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  transition: background-color 0.3s, color 0.3s, transform 0.3s;
}

html, body {
  height: 100%;
  overflow-x: hidden;
}

body {
  background-color: var(--light-bg);
  color: var(--light-text);
  line-height: 1.6;
  padding-bottom: 70px; /* Отступ для фиксированного меню */
}

body.dark-theme {
  background-color: var(--dark-bg);
  color: var(--dark-text);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px;
  width: 100%;
}

/* Шапка - НЕ закреплена */
header {
  background-color: var(--light-container);
  box-shadow: 0 2px 10px var(--light-shadow);
  padding: 15px 0;
  position: relative;
  z-index: 90;
}

.dark-theme header {
  background-color: var(--dark-container);
  box-shadow: 0 2px 10px var(--dark-shadow);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 15px;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 200px;
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 20px;
  cursor: pointer;
  color: var(--light-accent);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.theme-toggle:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .theme-toggle {
  color: var(--dark-text);
}

.dark-theme .theme-toggle:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.logo {
  font-size: 28px;
  font-weight: 700;
  color: var(--light-accent);
  white-space: nowrap;
}

.dark-theme .logo {
  color: var(--dark-accent);
}

.banner {
  width: 468px;
  height: 60px;
  background: linear-gradient(135deg, var(--light-header), var(--light-accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  font-size: 18px;
  flex-shrink: 0;
}

.dark-theme .banner {
  background: linear-gradient(135deg, var(--dark-header), var(--dark-accent));
}

/* Основной контент */
main {
  padding: 30px 0;
  min-height: calc(100vh - 200px);
}

/* Контентная область */
.content-area {
  background-color: var(--light-container);
  border-radius: 12px;
  box-shadow: 0 5px 15px var(--light-shadow);
  padding: 30px;
  margin-bottom: 30px;
}

.dark-theme .content-area {
  background-color: var(--dark-container);
  box-shadow: 0 5px 15px var(--dark-shadow);
}

.content-area h1 {
  color: var(--light-accent);
  margin-bottom: 20px;
  padding-bottom: 15px;
  border-bottom: 2px solid var(--light-border);
}

.dark-theme .content-area h1 {
  color: var(--dark-accent);
  border-bottom-color: var(--dark-border);
}

/* Нижняя панель навигации - ФИКСИРОВАННАЯ И ПРОСТАЯ */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: var(--light-container);
  box-shadow: 0 -2px 15px var(--light-shadow);
  z-index: 100;
  height: 70px;
  padding: 0;
  max-width: 1172px;
  margin: 0 auto;
  left: 50%;
  transform: translateX(-50%);
}

.dark-theme .bottom-nav {
  background-color: var(--dark-container);
  box-shadow: 0 -2px 15px var(--dark-shadow);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
  max-width: 100%;
  margin: 0;
  padding: 0;
}

.nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex: 1;
  height: 100%;
  text-decoration: none;
  color: var(--light-text);
  padding: 8px 5px;
  position: relative;
  transition: all 0.2s;
  border-top: 3px solid transparent;
}

.dark-theme .nav-item {
  color: var(--dark-text);
}

.nav-item i {
  font-size: 18px;
  margin-bottom: 4px;
  transition: all 0.2s;
}

.nav-item span {
  font-size: 11px;
  font-weight: 500;
  text-align: center;
  transition: all 0.2s;
}

.nav-item:hover {
  color: var(--light-accent);
  background-color: var(--light-btn-active);
}

.nav-item:hover i {
  color: var(--light-accent);
  transform: translateY(-2px);
}

.dark-theme .nav-item:hover {
  color: var(--dark-accent);
  background-color: var(--dark-btn-active);
}

.dark-theme .nav-item:hover i {
  color: var(--dark-accent);
}

.nav-item.active {
  color: var(--light-accent);
  border-top-color: var(--light-accent);
  background-color: var(--light-btn-active);
}

.nav-item.active i {
  color: var(--light-accent);
}

.dark-theme .nav-item.active {
  color: var(--dark-accent);
  border-top-color: var(--dark-accent);
  background-color: var(--dark-btn-active);
}

.dark-theme .nav-item.active i {
  color: var(--dark-accent);
}

/* Центральная кнопка меню - СТИЛЬНАЯ И КРУПНАЯ */
.menu-button-container {
  flex: 0 0 auto;
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-btn {
  background: linear-gradient(135deg, var(--light-accent), var(--light-header));
  color: white;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-weight: 700;
  font-size: 13px;
  box-shadow: 0 4px 12px rgba(44, 123, 229, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
  position: relative;
  top: -20px;
  z-index: 101;
}

.dark-theme .menu-btn {
  background: linear-gradient(135deg, var(--dark-accent), var(--dark-header));
  box-shadow: 0 4px 12px rgba(77, 150, 255, 0.4);
}

.menu-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 18px rgba(44, 123, 229, 0.6);
}

.dark-theme .menu-btn:hover {
  box-shadow: 0 6px 18px rgba(77, 150, 255, 0.6);
}

/* СТИЛЬНОЕ МЕНЮ ПОЛЬЗОВАТЕЛЯ */
.user-menu {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--light-container);
  z-index: 1000;
  padding: 20px;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: flex;
  flex-direction: column;
}

.dark-theme .user-menu {
  background-color: var(--dark-container);
}

.user-menu.active {
  transform: translateX(0);
}

.menu-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--light-border);
}

.dark-theme .menu-header {
  border-bottom-color: var(--dark-border);
}

.menu-header h2 {
  color: var(--light-accent);
  font-size: 24px;
}

.dark-theme .menu-header h2 {
  color: var(--dark-accent);
}

.close-menu {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--light-text);
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.close-menu:hover {
  background-color: rgba(0, 0, 0, 0.05);
}

.dark-theme .close-menu {
  color: var(--dark-text);
}

.dark-theme .close-menu:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.user-profile {
  display: flex;
  align-items: center;
  margin-bottom: 30px;
  padding: 20px;
  background: linear-gradient(135deg, var(--light-btn-active), rgba(44, 123, 229, 0.1));
  border-radius: 16px;
}

.dark-theme .user-profile {
  background: linear-gradient(135deg, var(--dark-btn-active), rgba(77, 150, 255, 0.1));
}

.user-avatar {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--light-accent), var(--light-header));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  font-weight: bold;
  color: white;
  margin-right: 20px;
  flex-shrink: 0;
}

.user-info h3 {
  font-size: 20px;
  margin-bottom: 5px;
}

.user-level {
  display: inline-block;
  background-color: var(--light-accent);
  color: white;
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 10px;
}

.dark-theme .user-level {
  background-color: var(--dark-accent);
}

.user-balance {
  font-size: 28px;
  font-weight: 700;
  color: var(--light-accent);
}

.dark-theme .user-balance {
  color: var(--dark-accent);
}

.menu-sections {
  display: flex;
  flex-direction: column;
  gap: 15px;
  margin-bottom: 30px;
  flex: 1;
}

.menu-section {
  background-color: var(--light-btn-active);
  border-radius: 12px;
  padding: 15px;
  transition: all 0.3s;
}

.menu-section:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px var(--light-shadow);
}

.dark-theme .menu-section {
  background-color: var(--dark-btn-active);
}

.dark-theme .menu-section:hover {
  box-shadow: 0 5px 15px var(--dark-shadow);
}

.section-title {
  color: var(--light-accent);
  font-size: 18px;
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.dark-theme .section-title {
  color: var(--dark-accent);
}

.section-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.section-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 15px 10px;
  background-color: var(--light-container);
  border-radius: 10px;
  text-decoration: none;
  color: var(--light-text);
  transition: all 0.2s;
}

.dark-theme .section-link {
  background-color: var(--dark-container);
  color: var(--dark-text);
}

.section-link:hover {
  background-color: var(--light-accent);
  color: white;
  transform: translateY(-2px);
}

.section-link:hover i {
  color: white !important;
}

.dark-theme .section-link:hover {
  background-color: var(--dark-accent);
  color: white;
}

.section-link i {
  font-size: 20px;
  margin-bottom: 8px;
  color: var(--light-accent);
  transition: color 0.2s;
}

.dark-theme .section-link i {
  color: var(--dark-accent);
}

.section-link span {
  font-size: 13px;
  font-weight: 600;
  text-align: center;
}

.menu-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.menu-theme-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 15px;
  background-color: var(--light-btn-active);
  border-radius: 12px;
  color: var(--light-text);
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  transition: all 0.3s;
}

.menu-theme-toggle:hover {
  background-color: var(--light-accent);
  color: white;
}

.menu-theme-toggle:hover .theme-icon {
  color: white;
}

.dark-theme .menu-theme-toggle {
  background-color: var(--dark-btn-active);
  color: var(--dark-text);
}

.dark-theme .menu-theme-toggle:hover {
  background-color: var(--dark-accent);
  color: white;
}

.theme-icon {
  color: var(--light-accent);
  transition: color 0.2s;
}

.dark-theme .theme-icon {
  color: var(--dark-accent);
}

.logout-btn {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, #ff4757, #ff3742);
  color: white;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}

.logout-btn i {
  margin-right: 10px;
}

.logout-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 5px 15px rgba(255, 71, 87, 0.4);
}

/* Оверлей для меню */
.menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s, visibility 0.3s;
}

.menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Стили для демонстрационных элементов на главной */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.stat-card {
  background-color: var(--light-btn-active);
  border-radius: 12px;
  padding: 25px;
  text-align: center;
  transition: all 0.3s;
}

.stat-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px var(--light-shadow);
}

.dark-theme .stat-card {
  background-color: var(--dark-btn-active);
}

.dark-theme .stat-card:hover {
  box-shadow: 0 8px 20px var(--dark-shadow);
}

.stat-card h3 {
  color: var(--light-accent);
  margin-bottom: 15px;
  font-size: 18px;
}

.dark-theme .stat-card h3 {
  color: var(--dark-accent);
}

.stat-value {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 10px;
}

/* Адаптивность */
@media (max-width: 768px) {
  .header-content {
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 15px;
  }
  
  .logo-container {
      justify-content: center;
      width: 100%;
      min-width: auto;
  }
  
  .banner {
      width: 100%;
      max-width: 468px;
      order: 3;
      margin-top: 5px;
  }
  
  .content-area {
      padding: 20px;
      margin-bottom: 20px;
  }
  
  /* Навигация для мобильных */
  .nav-item span {
      font-size: 10px;
  }
  
  .nav-item i {
      font-size: 16px;
  }
  
  .menu-btn {
      width: 55px;
      height: 55px;
      font-size: 12px;
      top: -15px;
  }
  
  .stats {
      grid-template-columns: 1fr;
      gap: 15px;
  }
  
  .section-links {
      grid-template-columns: 1fr;
  }
  
  .bottom-nav {
      max-width: 100%;
      left: 0;
      transform: none;
  }
}

@media (max-width: 480px) {
  .nav-item span {
      font-size: 9px;
  }
  
  .nav-item i {
      font-size: 15px;
  }
  
  .menu-btn {
      width: 50px;
      height: 50px;
      font-size: 11px;
      top: -12px;
  }
  
  .user-menu {
      padding: 15px;
  }
  
  .user-avatar {
      width: 60px;
      height: 60px;
      font-size: 24px;
      margin-right: 15px;
  }
  
  .user-info h3 {
      font-size: 18px;
  }
  
  .user-balance {
      font-size: 24px;
  }
}

@media (min-width: 769px) {
  .nav-item {
      padding: 10px 5px;
  }
  
  .nav-item i {
      font-size: 20px;
  }
  
  .nav-item span {
      font-size: 12px;
  }
  
  .menu-btn {
      width: 65px;
      height: 65px;
      font-size: 14px;
      top: -25px;
  }
  
  .user-menu {
      width: 400px;
      right: 0;
      left: auto;
      transform: translateX(100%);
      box-shadow: -5px 0 25px var(--light-shadow);
  }
  
  .dark-theme .user-menu {
      box-shadow: -5px 0 25px var(--dark-shadow);
  }
  
  .user-menu.active {
      transform: translateX(0);
  }
  
  .menu-overlay.active + .user-menu {
      transform: translateX(0);
  }
}

/* Анимация появления меню */
@keyframes slideIn {
  from {
      opacity: 0;
      transform: translateX(-100%);
  }
  to {
      opacity: 1;
      transform: translateX(0);
  }
}

/* Дополнительные стили для контента */
.features {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 30px 0;
}

.feature-card {
  background-color: var(--light-btn-active);
  border-radius: 12px;
  padding: 25px;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px var(--light-shadow);
}

.dark-theme .feature-card {
  background-color: var(--dark-btn-active);
}

.feature-card i {
  font-size: 36px;
  color: var(--light-accent);
  margin-bottom: 15px;
}

.dark-theme .feature-card i {
  color: var(--dark-accent);
}

.feature-card h3 {
  color: var(--light-accent);
  margin-bottom: 10px;
  font-size: 20px;
}

.dark-theme .feature-card h3 {
  color: var(--dark-accent);
}

.cta-button {
  display: inline-block;
  background: linear-gradient(135deg, var(--light-accent), var(--light-header));
  color: white;
  padding: 15px 30px;
  border-radius: 10px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s;
  margin-top: 10px;
  box-shadow: 0 4px 12px rgba(44, 123, 229, 0.3);
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 18px rgba(44, 123, 229, 0.4);
}

.dark-theme .cta-button {
  background: linear-gradient(135deg, var(--dark-accent), var(--dark-header));
  box-shadow: 0 4px 12px rgba(77, 150, 255, 0.3);
}

.dark-theme .cta-button:hover {
  box-shadow: 0 6px 18px rgba(77, 150, 255, 0.4);
}