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

html, body {
    height: 100%;
    overflow: hidden;          /* Отключаем глобальный скролл */
    font-family: Arial, sans-serif;
    background: #fafafa;
}

#page-container {
    width: 100vw;
    height: 100vh;
    position: relative;
    overflow: hidden;
    padding: 20px;
}

/* Панель навигации */
#nav-panel {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 15px;
    background: rgba(255, 255, 255, 0.9);
    padding: 12px 20px;
    border-radius: 30px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 1000;
}

#nav-panel button, #page-selector {
    padding: 8px 15px;
    border: none;
    border-radius: 6px;
    background: #2196F3;
    color: white;
    cursor: pointer;
    font-size: 16px;
    transition: background 0.2s;
}

#nav-panel button:disabled {
    background: #ccc;
    cursor: not-allowed;
}

#page-selector {
    padding: 8px 12px;
    background: white;
    color: #333;
    border: 1px solid #ccc;
}

#page-selector option {
    padding: 5px;
}

/* Номер страницы */
#page-number {
    position: fixed;
    top: 20px;
    right: 20px;
    background: rgba(0,0,0,0.6);
    color: #fff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 14px;
    z-index: 1000;
}