/* Импорт шрифтов */
@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@400;500;700&display=swap');

/* Определение CSS переменных для светлой темы по умолчанию */
:root {
  --font-family: 'Roboto', sans-serif;
  --bg-gradient: linear-gradient(135deg, #f8f9fa, #e9ecef);
  --text-color: #333;
  --header-bg: #fff;
  --header-shadow: rgba(0, 0, 0, 0.1);
  --header-text: #2c3e50;
  --button-bg: #3498db;
  --button-bg-hover: #2980b9;
  --button-text: #fff;
  --user-button-bg: #ff6b6b;
  --user-button-bg-hover: #ff4757;
  --container-bg: #fff;
  --container-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --link-color: #2c3e50;
  --link-hover: #3498db;
  --post-border: #f0f0f0;
  --like-bg: #2ecc71;
  --like-bg-hover: #27ae60;
  --dislike-bg: #e74c3c;
  --dislike-bg-hover: #c0392b;
}

/* Определение CSS переменных для тёмной темы */
.dark-theme {
  --bg-gradient: linear-gradient(135deg, #1c1c1c, #121212);
  --text-color: #e0e0e0;
  --header-bg: #1f1f1f;
  --header-shadow: rgba(0, 0, 0, 0.5);
  --header-text: #e0e0e0;
  --button-bg: #bb86fc;
  --button-bg-hover: #9b59b6;
  --button-text: #000;
  --user-button-bg: #cf6679;
  --user-button-bg-hover: #b55063;
  --container-bg: #1f1f1f;
  --container-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
  --link-color: #bb86fc;
  --link-hover: #3700b3;
  --post-border: #333;
  --like-bg: #03dac6;
  --like-bg-hover: #00bfa5;
  --dislike-bg: #cf6679;
  --dislike-bg-hover: #b55063;
}

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

/* Базовые стили страницы */
body {
  font-family: var(--font-family);
  background: var(--bg-gradient);
  color: var(--text-color);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
}

/* Анимация появления */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Шапка сайта */
header {
  background: var(--header-bg);
  padding: 20px 40px;
  box-shadow: 0 2px 4px var(--header-shadow);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 100;
  animation: fadeInUp 0.8s ease-out;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

header h1 {
  font-size: 2rem;
  color: var(--header-text);
}

/* Информация о пользователе */
#user-info {
  display: flex;
  align-items: center;
}

#user-info span {
  margin-right: 15px;
  font-weight: 500;
  font-size: 1rem;
  color: var(--header-text);
}

#user-info button {
  background: var(--user-button-bg);
  border: none;
  color: var(--button-text);
  padding: 10px 16px;
  border-radius: 30px;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.3s ease, transform 0.3s ease;
}

#user-info button:hover {
  background: var(--user-button-bg-hover);
  transform: scale(1.05);
}

/* Основные контейнеры */
#auth-container,
.new-post,
.search,
#posts {
  max-width: 800px;
  margin: 30px auto;
  padding: 20px;
  background: var(--container-bg);
  border-radius: 12px;
  box-shadow: var(--container-shadow);
  animation: fadeInUp 0.8s ease-out;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

/* Формы */
form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

form input,
form textarea {
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 1rem;
  transition: border 0.3s ease, box-shadow 0.3s ease;
}

form input:focus,
form textarea:focus {
  border-color: var(--button-bg);
  box-shadow: 0 0 10px rgba(52, 152, 219, 0.2);
  outline: none;
}

form button {
  padding: 15px;
  border: none;
  background: var(--button-bg);
  color: var(--button-text);
  border-radius: 30px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s ease, transform 0.3s ease;
}

form button:hover {
  background: var(--button-bg-hover);
  transform: translateY(-3px);
}

/* Поле поиска */
.search input {
  width: 100%;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 1rem;
  transition: border 0.3s ease;
}

.search input:focus {
  border-color: var(--button-bg);
  outline: none;
}

/* Стили постов */
.post {
  padding: 20px;
  border-bottom: 1px solid var(--post-border);
  transition: background 0.3s ease, transform 0.3s ease;
}

.post:hover {
  background: rgba(0, 0, 0, 0.03);
  transform: translateY(-2px);
}

.post:last-child {
  border-bottom: none;
}

/* Ссылка на пост */
.post .post-link {
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* Действия с постом */
.post-actions {
  margin-top: 15px;
  display: flex;
  gap: 10px;
}

.post-actions button {
  padding: 10px 16px;
  border: none;
  border-radius: 30px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: background 0.3s ease, transform 0.3s ease;
}

.post-actions button.like {
  background: var(--like-bg);
  color: var(--button-text);
}

.post-actions button.like:hover {
  background: var(--like-bg-hover);
  transform: scale(1.05);
}

.post-actions button.dislike {
  background: var(--dislike-bg);
  color: var(--button-text);
}

.post-actions button.dislike:hover {
  background: var(--dislike-bg-hover);
  transform: scale(1.05);
}

/* Стили для страницы отдельного поста */
#back {
  text-align: center;
  margin-top: 30px;
}

#back a {
  text-decoration: none;
  color: var(--link-color);
  font-size: 1rem;
  transition: color 0.3s ease;
}

#back a:hover {
  color: var(--link-hover);
}

/* Кнопка переключения темы */
.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--button-bg);
  border: none;
  color: var(--button-text);
  padding: 10px 16px;
  border-radius: 30px;
  cursor: pointer;
  font-size: 1rem;
  transition: background 0.3s ease, transform 0.3s ease;
  z-index: 1000;
}

.theme-toggle:hover {
  background: var(--button-bg-hover);
  transform: scale(1.05);
}

/* Адаптивный дизайн */
@media (max-width: 768px) {
  header {
    flex-direction: column;
    padding: 15px;
  }
  #auth-container,
  .new-post,
  .search,
  #posts {
    margin: 20px;
    padding: 15px;
  }
}

/* Стилизация иконки с подсказкой */
.tooltip {
  position: relative;
  display: inline-block;
  cursor: pointer;
  color: var(--link-color);
  transition: color 0.3s ease;
}

.tooltip:hover {
  color: var(--link-hover);
}

.tooltip .tooltip-text {
  visibility: hidden;
  width: 220px;
  background: var(--container-bg);
  color: var(--text-color);
  box-shadow: var(--container-shadow);
  text-align: left;
  border-radius: 8px;
  padding: 12px;
  position: absolute;
  bottom: 120%;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s ease, transform 0.3s ease;
  font-size: 0.9rem;
  z-index: 100;
}

.tooltip:hover .tooltip-text {
  visibility: visible;
  opacity: 1;
  transform: translateX(-50%) translateY(-5px);
}

.tooltip-text a {
  color: var(--link-color);
  text-decoration: none;
  transition: color 0.3s ease;
}

.tooltip-text a:hover {
  color: var(--link-hover);
}

.tooltip i {
  font-size: 1rem;
  vertical-align: middle;
}