body {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100vh;
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1a1a1a;
    overflow: hidden;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    transition: background-image 0.5s ease-in-out;
}

/* Фоны для разных экранов */
body.menu-bg {
    background-image: url('menu_bg.png');
}
body.shop-bg {
    background-image: url('shop_bg.png');
}

/* Класс для фона страницы во время игры */
body.game-page-bg {
    background-image: url('game_page_bg.png');
}

.hidden {
    display: none !important;
}

#mainMenu, #shopMenu, #missionsMenu { /* Добавлено #missionsMenu */
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 30px;
    width: 450px;
    background-color: rgba(255, 255, 255, 0.9);
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

#mainMenu p {
    color: #444;
    font-weight: bold;
    font-size: 1.3em;
}

h1 {
    font-size: 3.5em;
    color: #333;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

h2 {
    font-size: 2.5em;
    color: #444;
}

#mainMenu button, #shopMenu button, #missionsMenu button { /* Добавлено #missionsMenu button */
    font-size: 1.5em;
    padding: 20px 0;
    margin: 15px 0;
    cursor: pointer;
    border-radius: 8px;
    border: none;
    color: white;
    background-color: #007BFF;
    transition: all 0.3s ease;
    width: 100%;
}

#mainMenu button:hover, #shopMenu button:hover, #missionsMenu button:hover { /* Добавлено #missionsMenu button:hover */
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0, 123, 255, 0.5);
}

#shopMenu button, #missionsMenu button { /* Добавлено #missionsMenu button */
    background-color: #6c757d;
}

#shopMenu button:hover, #missionsMenu button:hover { /* Добавлено #missionsMenu button:hover */
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

#shopTabs {
    display: flex;
    width: 100%;
    margin-bottom: 20px;
}
.tab-button {
    flex: 1;
    padding: 10px !important;
    font-size: 1.1em !important;
    margin: 0 !important;
    border-radius: 0 !important;
    background-color: #a9a9a9 !important;
}
.tab-button.active {
    background-color: #6c757d !important;
    transform: none !important;
    box-shadow: none !important;
}
.tab-button:first-child { border-top-left-radius: 8px !important; }
.tab-button:last-child { border-top-right-radius: 8px !important; }

.tab-content { display: none; width: 100%; }
.tab-content.active { display: block; }


#skinShopSelector {
    display: flex;
    justify-content: center;
    align-items: center;
    margin: 20px 0;
    flex-wrap: wrap;
    gap: 15px;
}

/* Стили для миссий и улучшений */
#missionsContainer {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

#upgradesContent.active {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.mission-item, .upgrade-item {
    background-color: #e9ecef;
    padding: 15px;
    border-radius: 8px;
    text-align: left;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.mission-item-progress-bar {
    width: 100%;
    height: 10px;
    background-color: #ced4da;
    border-radius: 5px;
    overflow: hidden;
    margin-top: 5px;
}

.mission-item-progress {
    height: 100%;
    background-color: #28a745;
    border-radius: 5px;
}

.mission-item-progress-bar.completed .mission-item-progress {
    background-color: #ffd700; /* Золотой цвет для выполненных */
}

.mission-item p, .upgrade-item p {
    margin: 0;
    color: #333;
}

.upgrade-item .upgrade-name {
    font-weight: bold;
}

.upgrade-item .shield-color {
    color: #007bff;
}

.upgrade-item .magnet-color {
    color: #dc3545;
}

.upgrade-item .score-doubler-color {
    color: #28a745;
}

.upgrade-item .double-jump-color {
    color: gold;
}

.upgrade-item .upgrade-increment {
    color: #28a745;
    font-size: 0.9em;
}

.claim-button, .upgrade-button {
    padding: 8px 15px !important;
    font-size: 0.9em !important;
    width: auto !important;
    margin: 0 !important;
    background-color: #28a745 !important;
}
.claim-button:disabled {
    background-color: #6c757d !important;
    cursor: not-allowed;
}

.upgrade-button {
    background-color: #007bff !important;
}

.skin-shop-option {
    position: relative;
    padding: 10px;
    cursor: pointer;
    border: 3px solid transparent;
    border-radius: 10px;
    background-color: #f0f0f0;
    transition: all 0.3s ease;
}

.skin-shop-option.rarity-common {
    border-color: #007bff;
    box-shadow: 0 0 15px rgba(0, 123, 255, 0.5);
}
.skin-shop-option.rarity-rare {
    border-color: #8a2be2;
    box-shadow: 0 0 15px rgba(138, 43, 226, 0.6);
}
.skin-shop-option.rarity-legendary {
    border-color: #ff8c00;
    box-shadow: 0 0 18px rgba(255, 140, 0, 0.7);
}

.skin-shop-option:hover {
    transform: scale(1.05);
}

.skin-shop-option img {
    width: 70px;
    height: 70px;
    display: block;
}

.skin-shop-option.selected {
    transform: scale(1.05);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1.05);
    }
    50% {
        transform: scale(1.08);
    }
    100% {
        transform: scale(1.05);
    }
}

.skin-shop-option .price {
    position: absolute;
    bottom: 0px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(0, 0, 0, 0.8);
    color: gold;
    padding: 3px 8px;
    border-radius: 5px;
    font-size: 14px;
    font-weight: bold;
}

canvas {
    border: 3px solid #333;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

.music-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    font-size: 2em;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1000;
    transition: transform 0.2s ease;
}

.music-toggle:hover {
    transform: scale(1.1);
} 

#watermark {
    position: fixed;
    bottom: 15px;
    right: 15px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 16px;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    z-index: 2000;
    pointer-events: none;
}