/*
 * Globals
 */

:root {
  --primary-color: #3b82f6;
  --primary-light: #60a5fa;
  --secondary-color: #2563eb;
  --accent-color: #7dd3fc;
  --light-bg: #f8fafc;
  --text-color: #1e293b;
  --text-light: #64748b;
  --border-radius: 12px;
  --box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --transition: all 0.3s ease;
}

/* Custom default button */
.btn-light,
.btn-light:hover,
.btn-light:focus {
  color: var(--text-color);
  text-shadow: none; /* Prevent inheritance from `body` */
}


/*
 * Base structure
 */

html, body {
  height: 100%;
  margin: 0;
  padding: 0;
}

body {
  color: var(--text-color);
  text-shadow: none;
  background-color: var(--light-bg);
  background-image: 
    radial-gradient(at 40% 20%, rgba(59, 130, 246, 0.1) 0px, transparent 50%),
    radial-gradient(at 80% 0%, rgba(125, 211, 252, 0.1) 0px, transparent 50%),
    radial-gradient(at 0% 50%, rgba(37, 99, 235, 0.1) 0px, transparent 50%),
    radial-gradient(at 80% 100%, rgba(125, 211, 252, 0.1) 0px, transparent 50%);
  background-attachment: fixed;
  background-size: cover;
  min-height: 100vh;
  position: relative;
  font-family: 'Segoe UI', 'Roboto', 'Arial', sans-serif;
}

.cover-container {
  max-width: 1200px;
  padding: 1rem;
}


/*
 * Header
 */

.nav-masthead .nav-link {
  color: var(--text-light);
  position: relative;
  padding: 0.5rem 0.8rem;
  margin: 0 0.2rem;
  transition: var(--transition);
  border-bottom: none;
  font-weight: 500;
}

.nav-masthead .nav-link:hover,
.nav-masthead .nav-link:focus {
  color: var(--primary-color);
  border-bottom: none;
}

.nav-masthead .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0.8rem;
  right: 0.8rem;
  height: 3px;
  background: transparent;
  border-radius: 3px;
  transition: var(--transition);
  transform: scaleX(0);
}

.nav-masthead .nav-link:hover::after {
  background: var(--primary-light);
  transform: scaleX(0.8);
}

.nav-masthead .active {
  color: var(--primary-color);
  border-bottom: none;
}

.nav-masthead .active::after {
  background: var(--primary-color);
  transform: scaleX(1);
}

/* Card styles */
.card {
  background: white;
  border-radius: var(--border-radius);
  border: none;
  box-shadow: var(--box-shadow);
  overflow: hidden;
  transition: var(--transition);
}

.card:hover {
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  transform: translateY(-2px);
}

/* Button styles */
.btn {
  border-radius: 8px;
  font-weight: 500;
  transition: var(--transition);
  padding: 0.5rem 1.25rem;
  box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

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

.btn-primary:hover, .btn-primary:focus {
  background-color: var(--secondary-color);
  border-color: var(--secondary-color);
  box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

/* 
 * Адаптивные стили для мобильных устройств 
 */
@media (max-width: 992px) {
  .cover-container {
    max-width: 100%;
    padding: 0.75rem;
  }
  
  /* Настройка отступов и размеров для контейнеров */
  main {
    width: 100% !important;
    padding: 1rem !important;
  }
  
  /* Улучшения для карточек */
  .card {
    width: 100% !important;
    max-width: 100% !important;
    margin-bottom: 1rem;
  }
  
  .card-body {
    padding: 1.25rem;
  }
  
  /* Исправления для таблиц */
  .table-responsive {
    max-width: 100%;
    overflow-x: auto;
  }
  
  /* Стили для кнопок */
  .btn {
    padding: 0.375rem 0.75rem;
    font-size: 0.95rem;
  }
}

/* Стили для маленьких экранов */
@media (max-width: 576px) {
  .cover-container {
    padding: 0.5rem;
  }
  
  .p-3 {
    padding: 0.75rem !important;
  }
  
  /* Настройка шрифтов */
  h1 {
    font-size: 1.75rem;
  }
  
  h2 {
    font-size: 1.5rem;
  }
  
  h3 {
    font-size: 1.25rem;
  }
  
  h4, .h4 {
    font-size: 1.1rem;
  }
  
  .modal-dialog {
    margin: 0.25rem auto;
  }
}