:root {
  /* Базовая палитра */
  --color-white: #fff;
  --color-black: #000;
  --color-light-gray: #f0f0f0;
  --color-gray: #ccc;
  --color-dark-gray: #555;
  --color-darker-gray: #333;
  --color-darkest-gray: #1e1e1e;
  
  /* Акцентные цвета */
  --color-accent-blue: #007bff;
  --color-accent-red: #e74c3c;
  --color-accent-yellow: #ffeb3b;
}

/* Сброс и общие стили */
* {box-sizing: border-box; margin: 0; padding: 0;}
body {background-color: var(--color-white); color: var(--color-darker-gray); font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; line-height: 1.6; padding: 0; transition: background-color 0.4s ease, color 0.4s ease;}

/* Тёмная тема */
body.dark-theme {background-color: var(--color-darkest-gray); color: var(--color-light-gray);}

/* Контейнер */
.container {margin: 0 auto; max-width: 1200px; padding: 0 15px; width: 90%;}

/* Хедер */
.header {background-color: var(--color-white); box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1); padding: 15px 0; position: sticky; top: 0; z-index: 1000;}
body.dark-theme .header {background-color: var(--color-darker-gray); box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);}
.header-container {align-items: center; display: flex; justify-content: space-between;}
.logo {font-size: 1.5rem; font-weight: bold;}

/* Кнопка настроек */
.settings-btn {background: none; border-radius: 50%; border: none; color: var(--color-dark-gray); cursor: pointer; font-size: 1.5rem; padding: 8px; transition: background-color 0.2s, color 0.2s;}
.settings-btn:hover {background-color: var(--color-light-gray); color: var(--color-black);}
body.dark-theme .settings-btn:hover {background-color: var(--color-dark-gray); color: var(--color-white);}

/* Всплывающее окно */
.settings-popup {background: var(--color-white); box-shadow: -2px 0 15px rgba(0, 0, 0, 0.2); height: 100vh; max-width: 350px; overflow-y: auto; padding: 25px; position: fixed; right: 0; top: 0; transform: translateX(100%); transition: transform 0.3s ease; width: 100%; z-index: 2000;}
body.dark-theme .settings-popup {background-color: var(--color-darker-gray);}
.settings-popup.show {transform: translateX(0);}
.settings-popup.hidden {display: none;}
.popup-content {padding-top: 20px; position: relative;}

/* Кнопка закрытия */
.close-btn {background: none; border-radius: 50%; border: none; color: var(--color-dark-gray); cursor: pointer; font-size: 1.5rem; padding: 5px; position: absolute; right: 0; top: 0;}
.close-btn:hover {color: var(--color-accent-red);}

/* Стили внутри попапа */
.popup-content h3 {font-size: 1.3rem; margin-bottom: 25px; text-align: center;}
.btn {background-color: var(--color-accent-blue); border-radius: 8px; border: none; color: var(--color-white); cursor: pointer; display: block; font-size: 1rem; margin: 15px 0; padding: 12px; transition: background-color 0.2s; width: 100%;}
.btn:hover {background-color: #0056b3;}
.form-group {margin: 25px 0;}
.form-group label {display: block; font-size: 0.95rem; font-weight: 500; margin-bottom: 8px;}
.select {background: var(--color-white); border-radius: 6px; border: 1px solid var(--color-gray); font-size: 1rem; padding: 10px; width: 100%;}
body.dark-theme .select {background-color: var(--color-darkest-gray); border-color: var(--color-dark-gray); color: var(--color-white);}

/* Основной контент */
.main {padding: 40px 0;}
.main h2 {font-size: 2rem; margin-bottom: 20px;}
.main p {font-size: 1rem; line-height: 1.8;}

/* === Поле поиска === */
.search-box {margin: 20px 0; text-align: center;}
#search-input {background: var(--color-white); border-radius: 8px; border: 1px solid var(--color-gray); color: var(--color-darker-gray); font-size: 1rem; max-width: 500px; padding: 12px; width: 100%;}
body.dark-theme #search-input {background: var(--color-darkest-gray); border-color: var(--color-dark-gray); color: var(--color-white);}

/* === Сетка плиток === */
.tiles-grid {display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); margin-top: 20px;}

/* === Плитка === */
.tile {aspect-ratio: 1 / 1; background: var(--color-light-gray); border-radius: 12px; box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1); overflow: hidden; position: relative; transition: transform 0.2s, box-shadow 0.2s;}
body.dark-theme .tile {background: var(--color-darker-gray); box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);}
.tile:hover {box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15); transform: translateY(-4px);}
body.dark-theme .tile:hover {box-shadow: 0 6px 12px rgba(0, 0, 0, 0.4);}
.tile-link {align-items: center; color: #2c3e50; display: flex; flex-direction: column; height: 100%; justify-content: center; padding: 12px; text-align: center; text-decoration: none; width: 100%; word-break: break-word;}
body.dark-theme .tile-link {color: var(--color-light-gray);}
.tile-text {font-size: 1rem; font-weight: bold; margin-bottom: 6px;}

/* Теги под названием */
.tile-tags {color: var(--color-dark-gray); font-size: 0.7rem; line-height: 1.3; opacity: 0.9;}
body.dark-theme .tile-tags {color: var(--color-gray);}

/* Подсветка поиска */
.highlight {background-color: var(--color-accent-yellow); border-radius: 2px; color: var(--color-black); padding: 0 2px;}

/* Кнопка "избранное" */
.fav-btn {background: none; border: none; cursor: pointer; font-size: 1.2rem; position: absolute; right: 8px; top: 8px; z-index: 2;}
.fav-btn i {color: #f39c12 !important;}

/* Контейнер для центрирования */
.donate-container {margin: 2rem 0; text-align: center;}

/* Стили кастомной кнопки */
.custom-donate-btn {
    color: var(--color-black); 
    background-color: var(--color-accent-yellow); 
    border-radius: 8px; 
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); 
    display: inline-block; 
    font-size: 1.1rem; 
    font-weight: bold; 
    padding: 12px 32px; 
    text-decoration: none; 
    transition: background-color 0.2s, transform 0.1s;
}
.custom-donate-btn:hover {
    transform: translateY(-2px); 
    background-color: #ffc400; 
    box-shadow: 0 6px 8px rgba(0, 0, 0, 0.15);
}
.custom-donate-btn:active {transform: translateY(0);}

/* Адаптивность */
@media (max-width: 768px) {
    .logo {font-size: 1.3rem;}
    .settings-btn {font-size: 1.3rem;}
    .settings-popup {max-width: 100%; width: 100%;}
    .tiles-grid {grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));}
}

@media (max-width: 480px) {
    .logo {font-size: 1.2rem;}
    .popup-content h3 {font-size: 1.2rem;}
    .custom-donate-btn {padding: 10px 24px; font-size: 1rem;}
}

@media (max-width: 360px) {
    .tiles-grid {grid-template-columns: 1fr;}
}