hestiacp/install/deb/themes/flat.css

/* Flat theme */

body {
    letter-spacing: 0;
}

b, strong {
    font-weight: 600;
}

.body-login, .body-reset {
    background: #5f7eb3 !important;
}

.table-header {
    box-shadow: none !important;
    background: #fafafa !important;
}
.advanced-options {
    background: #fafafa !important;
}

.to-top, .to-shortcuts, 
.to-top:hover, .to-shortcuts:hover,
.to-top:active, .to-shortcuts:active {
    box-shadow: none !important;
    background: none !important;
    background-color: #eee !important;
} 

.l-header {
    box-shadow: none;
    background: #5070a6;
}

.l-menu__item--active {
    background-color: #fff;
}

.l-menu__item.l-menu__item--active a {
    background: none;
}

.l-menu__item a:hover {
    background: #FFFFFF !important;
    box-shadow: none;
}

.l-menu__item a:active {
    background: none;
    box-shadow: none;
}

.l-profile__notifications:hover,
.l-profile__notifications.updates:hover,
.l-profile__notifications.active.l-profile__notifications.updates:active {
    background: white !important;
    border: 1px solid transparent !important;
    box-shadow: none !important;
}

.l-unit:hover {
    box-shadow: none;
}

.l-unit__stat-col--left a, .l-unit__stat-col--left a:visited {
    color: #5f7eb3;
}

.l-unit__stat-col--left a:hover {
    color: #474747;
}

.l-unit:hover, .units .l-unit:hover {
    box-shadow: none;
}
.vst-input {
    box-shadow: none;
}

.vst-list {
    box-shadow: none;
}

.advanced-options {
    box-shadow: none !important;
}

.vst-textinput {
    box-shadow: none;
}

.ui-button, .button {
    box-shadow: none !important;
    background: linear-gradient(to bottom, rgba(235,243,249,1) 0%,rgba(223,235,245,1) 100%) !important;
}

.ui-button.cancel, .button.cancel {
    box-shadow: none !important;
    background: linear-gradient(to bottom, rgba(250,250,250,1) 0%,rgba(241,241,241,1) 100%) !important;
}

.ui-button:hover, .button:hover, .ui-button.cancel:hover, .button.cancel:hover {
    box-shadow: none !important;
    background: linear-gradient(to bottom, rgba(241,248,253,1) 0%,rgba(227,240,251,1) 100%) !important;
}

.ui-button:focus,.ui-button:active,
.button:active,.button:focus,.ui-button.cancel:focus,.ui-button.cancel:active,
.button.cancel:active,.button.cancel:focus {
    box-shadow: none !important;
    background: linear-gradient(to bottom, rgba(210,232,250,1) 0%,rgba(194,224,248,1) 100%) !important;
}

.ui-button.danger:hover, .button.danger:hover {
    background: #fcd3cf !important;
    color: #F4301A !important;
    border: 1px solid #F27E71 !important;
}
  
.ui-button.danger:active, .button.danger:active, .ui-button.danger:focus, .button.danger:focus {
    background: #a91200 !important; 
    color: #fff !important;
    border: 1px solid #F4301A !important;
}

.alert {
    text-shadow: none !important;
    box-shadow: none !important;
}

.pill.usage {
    box-shadow: none;
}

.badge {
    box-shadow: none;
}

.notification-container {
    box-shadow: none;
    border: 1px solid #dadada;
}

.context-menu.sort-order {
    box-shadow: none;
    border: 1px solid #dadada;
}