/* Стили для модального окна */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  backdrop-filter: blur(5px);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.modal-overlay.active {
  display: flex;
  opacity: 1;
}

.modal-container {
  background: white;
  border-radius: 15px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
  max-width: 100%;
  width: 1500px;
  overflow: hidden;
  transform: scale(0.9);
  transition: transform 0.3s ease;
}

.modal-overlay.active .modal-container {
  transform: scale(1);
}

.modal-header {
  background: linear-gradient(135deg, #2a5298, #1e3c72);
  color: white;
  padding: 20px 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-header h2 {
  margin: 0;
  font-size: 1.5em;
  text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.3);
}

.modal-close {
  background: none;
  border: none;
  color: white;
  font-size: 2em;
  cursor: pointer;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-content {
  padding: 25px;
  max-height: 60vh;
  overflow-y: auto;
}

/* Стили для таблицы Менделеева */
.periodic-table-image {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.table-legend {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-top: 20px;
  padding: 15px;
  background: #f8f9fa;
  border-radius: 8px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9em;
  color: #333;
}

.color-box {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  border: 1px solid #ddd;
}

.color-box.metal {
  background: #ff9999;
}

.color-box.nonmetal {
  background: #99ff99;
}

.color-box.metalloid {
  background: #ffff99;
}

.color-box.unknown {
  background: #cccccc;
}

.modal-footer {
  padding: 20px 25px;
  background: #f8f9fa;
  border-top: 1px solid #e9ecef;
  text-align: right;
}

.modal-button {
  background: linear-gradient(135deg, #3498db, #2980b9);
  border: none;
  color: white;
  padding: 10px 20px;
  border-radius: 25px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: all 0.3s ease;
}

.modal-button:hover {
  background: linear-gradient(135deg, #2980b9, #3498db);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(52, 152, 219, 0.3);
}

/* Анимация появления */
@keyframes modalFadeIn {
  from {
    opacity: 0;
    transform: translateY(-50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-container {
  animation: modalFadeIn 0.3s ease-out;
}

/* Адаптивность для мобильных */
@media (max-width: 768px) {
  .modal-container {
    max-width: 95%;
    width: 95%;
    margin: 20px;
  }

  .modal-header {
    padding: 15px 20px;
  }

  .modal-header h2 {
    font-size: 1.3em;
  }

  .modal-content {
    padding: 15px;
    max-height: 50vh;
  }

  .table-legend {
    flex-direction: column;
    gap: 10px;
    align-items: flex-start;
  }

  .modal-footer {
    padding: 15px 20px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .modal-header h2 {
    font-size: 1.2em;
  }

  .modal-content {
    padding: 10px;
  }

  .legend-item {
    font-size: 0.8em;
  }

  .color-box {
    width: 16px;
    height: 16px;
  }
}

/* Альтернативный вариант - таблица созданная через CSS */
.periodic-table-css {
  display: grid;
  grid-template-columns: repeat(18, 1fr);
  gap: 2px;
  margin: 20px 0;
}

.element {
  background: #e3f2fd;
  border: 1px solid #90caf9;
  border-radius: 4px;
  padding: 5px;
  text-align: center;
  font-size: 0.7em;
  cursor: pointer;
  transition: all 0.2s ease;
}

.element:hover {
  transform: scale(1.1);
  z-index: 10;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.element.symbol {
  font-weight: bold;
  font-size: 1.1em;
}

.element.number {
  font-size: 0.6em;
  color: #666;
}