friendica-github/view/theme/vier/mobile.css

aside, header, #nav-search-box, #nav-admin-link, #nav-messages-linkmenu,  #activity-by-date-tab, #shared-links-tab, #nav-logout-link,
.wall-item-location {
  display: none;
}

.hide-comments-outer {
  width: calc(100% - 105px);
}

section {
  box-sizing: border-box;
  left: 0px;
  width: 100%;
  max-width: 100%;
  padding: 5px;
}

body, section, nav .nav-menu, div.pager, ul.tabs {
  font-size: 16px;
}

.wall-item-container .wall-item-ago, .wall-item-network,.type-link blockquote, .type-video blockquote {
  font-size: 13px;
}

nav {
  min-width: 100%;
}

.wall-item-container .wall-item-content {
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
/*  margin-left: -70px;
  padding-top: 25px; */
}

nav ul {
    margin-left: 0px;
}


.wall-item-container .wall-item-content img,
.children .wall-item-container .wall-item-item .wall-item-content img,
.wall-item-container .wall-item-content .type-link img.attachment-image, .type-link img.attachment-image, .type-video img.attachment-image {
  max-width: 650px;
}

@media screen and (max-width: 800px) {
  .wall-item-container .wall-item-content img,
  .children .wall-item-container .wall-item-item .wall-item-content img,
  .wall-item-container .wall-item-content .type-link img.attachment-image, .type-link img.attachment-image, .type-video img.attachment-image {
    max-width: 450px;
  }
}

@media screen and (max-width: 600px) {
  .wall-item-container .wall-item-content img,
  .children .wall-item-container .wall-item-item .wall-item-content img,
  .wall-item-container .wall-item-content .type-link img.attachment-image, .type-link img.attachment-image, .type-video img.attachment-image {
    max-width: 350px;
  }
  .desktop-view { display: none; }
  .mobile-view { display: initial; }
  #nav-apps-link { display: none; }

  .wall-item-container .wall-item-info { width: auto; }
  .contact-photo-wrapper { width: 55px; }
  .wwto { left: 0px; }

  .type-link > a { height: 120px; width: 100%; overflow: hidden; display: block; }
  .type-link > a > img { display: block; max-width: 100%!important; width: 100% !important; height: 100% !important; object-fit: cover !important; }

    /** oembed **/
  .embed_video {
    float: none;
    margin: 0px;
    width: 100%;
    overflow: hidden;
    display: block;
  }
  .embed_video > img {
    display: block;
    width: 100% !important;
    height: 100% !important;
    max-width: 100% !important;
    object-fit: cover !important;
  }
  .embed_video > div {
    background-image: none !important; background-color: transparent !important;
    width: 100% !important; height: 110px !important;
  }

  #login-extra-links, #login-form {
    /* width: 341px; */
    width: 100%;
  }
  #id_remember_label {
    width: unset;
  }
}

@media screen and (max-width: 480px) {
  .wall-item-container .wall-item-content img,
  .wall-item-container .wall-item-content .type-link img.attachment-image, .type-link img.attachment-image, .type-video img.attachment-image {
    max-width: 200px;
  }
  /* fix img width in threaded view - maybe there exists a better possibility to do this 
    maybe this needs also to be done for tablet view*/
  .children .wall-item-container .wall-item-item .wall-item-content img {
    max-width: 100%;
  }
  iframe.embed_rich { width: 100% !important }
    /* TODO: check if this is needed.
   * oembedded iframe usually have "width" and "height" as attributes
   * that override this rule */
  iframe {
    max-width: 100%;
  }

  
  /* the top-nav notfication menu */
  nav #nav-notifications-linkmenu .menu-popup {
	position: fixed;
	left: 10px;
	right: 10px;
	top: 44px;
	bottom: 10px;
	width: auto;
	max-width: none;
	max-height: none;
  }
  

}

.wall-item-container.thread_level_2,
.wall-item-container.thread_level_3,
.wall-item-container.thread_level_4,
.wall-item-container.thread_level_5,
.wall-item-container.thread_level_6,
.wall-item-container.thread_level_7 {
  margin-left: 0;
  width: calc(100% - 10px);
}

.wall-item-container.thread_level_2 .wall-item-content,
.wall-item-container.thread_level_3 .wall-item-content,
.wall-item-container.thread_level_4 .wall-item-content,
.wall-item-container.thread_level_5 .wall-item-content,
.wall-item-container.thread_level_6 .wall-item-content,
.wall-item-container.thread_level_7 .wall-item-content {
  max-width: 100%;
}

/* aside in/out */
.mobile-aside-toggle {
	display: block !important;
}
.mobile-aside-toggle a {
	line-height: 35px;
	padding: 0 10px;
}
.mobile-aside-toggle a i {
	font-size: 22px;
	color: #CCC;
}

aside {
	display: block;
	position: fixed;
	max-width: 400px;
	width: 80%;
	left: -100%;
	-webkit-transition: left 0.5s;
	-moz-transition: left 0.5s;
	-o-transition: left 0.5s;
	transition: left 0.5s;
}

aside.show {
	left: 0;
}

/* tabs */
.tabs { position: relative; height: 25px!important; }
.tabs li { width: 100%; }
.tabs .tab { display: none;}
.tabs .tab.active { display: block; }
.tabs::after {
	font-family: FontAwesome;
	text-align: right;
	content: "\f13a";
	display: block;
	position: absolute;
	left: 0; right:0; top: 0; bottom: 0;
	padding: 8px 2px 0 0;
}

.tabs.show {
	position: fixed;
	z-index: 1000;
	left: 10px;
	right: 10px;
	top: 0px;
	bottom: 10px;
	height: auto !important;
	border: 1px solid #ccc;
}
.tabs.show::after { display: none; }
.tabs.show .tab { display: block; }

/* jot buttons */
#profile-jot-submit,
#jot-preview-link {
    float: none;
    display: block;
    width: 100%;
    margin: 0 0 1em 0;
}
#profile-jot-submit-wrapper > div {
    margin: 0 1em 1em 0;
}
#profile-jot-submit-wrapper > div#profile-jot-perms { margin: 0; }
 
/* ACL window */
#profile-jot-acl-wrapper, #profile-jot-acl-wrapper * { box-sizing: border-box; }
#acl-wrapper { width: 100%; float: none; }
/* flexbox for ACL window */
#cboxLoadedContent,
#cboxLoadedContent > div,
#acl-wrapper {
  display: -ms-Flexbox !important;
  -ms-box-orient: vertival;

  display: -webkit-flex !important;
  display: -moz-flex !important;
  display: -ms-flex !important;
  display: flex !important;

  -webkit-flex-flow: column;
  -moz-flex-flow: column;
  -ms-flex-flow: column;
  flex-flow: column;
  
  -webkit-flex: 1 100%;
  -moz-flex: 1 100%;
  -ms-flex: 1 100%;
  flex: 1 100%;
}

/** input elements **/
input,
textarea,
select {
    font-size: 18px;
    border: 1px solid #888;
    padding: 0.2em;
}
input:focus,
textarea:focus,
select:focus {
    box-shadow: 1px 1px 10px rgba(46, 151, 255, 0.62);
}

.field, .field > * {  box-sizing: border-box; }
.field label { width: 100%; float: none; display: block; }
.field input, .field textarea, .field select { max-width: 100%; width: 100%; }
.field.checkbox input { width: auto; float: right; }
.field.checkbox label { width: 70%; float: left; }
.field .field_help { margin: 0; }

/** event **/
.event-start, .event-end { width: auto; }
.event-start .dtstart, .event-end .dtend { float: none; display: block; }

/** prv mail **/
.mail-conv-detail { margin-left: 0px; width: 100%; }
#prvmail-submit, #prvmail-text, #prvmail-subject { box-sizing: border-box; width: 100%; }