gnu-social/public/assets/css/base.css

:root {
    /* FONTS */
    --main-font: 'Inter var', sans-serif;

    /* UNITS
     * unit size      - every element should be a multiplier of this
     * main size      - used for headers and icons
     * medium size    - same as above, except that the element in question is contained in something else
     * small size     - used in common text, borders
     */
    --unit-size: 0.5rem;
    --main-size: 1.5rem;
    --medium-size: 1.2rem;
    --small-size: 1rem;



    /* transitions and animations */
    --cubic-transition: all 200ms cubic-bezier(0, 0.55, 0.45, 1);
    --fade-in: fadeIn 200ms cubic-bezier(0, 0.55, 0.45, 1);
    --fade-out: fadeOut 200ms cubic-bezier(0, 0.55, 0.45, 1);
}

@media (prefers-color-scheme: dark) {
    :root {
        /* colours and shadows */
        --bg1: #242434;
        --bg2: #46465E;
        --bg3: #8081BA;
        --bg-button: linear-gradient(180deg, var(--bg2), transparent) !important;

        --translucent: #1A1A2666;
        --white: #FFFFFF;

        --shadow: 0px 0px 32px 0px #00000066;
        --shadow-light: 0px 0px 32px 0px #FFFFFF66;
    }

    .bg {
        background-image: url(../images/bg.png);
    }

    select {
        background-image: url("../images/drop.png") !important;
    }
}

@media (prefers-color-scheme: light) {
    :root {
        /* colours and shadows */
        --bg1: #F4F2E8;
        --bg2: #B5BBB4;
        --bg3: #6C766B;
        --bg-button: #F4F2E866 !important;

        --translucent: #F4F2E866;
        --white: #002B36;

        --shadow: 0px 0px 32px 0px #00000066;
        --shadow-light: 0px 0px 32px 0px #FFFFFF66;
    }

    .bg {
        background-image: url(../images/bg-light.png);
    }

    select {
        background-image: url("../images/drop-light.png") !important;
    }
}


a,
a:visited {
    text-decoration: none;
    color: var(--white);
}

a:focus,
a:hover {
    text-decoration: underline;
    color: var(--white);
}

figcaption a:link {
    font-size: var(--small-size);
    color: var(--white);
}

hr {
    all: unset;
    display: block;
    height: 2px;
    background: var(--bg2);
}

summary:focus,
summary:hover {
    cursor: pointer !important;
    color: var(--bg1);
    padding-left: var(--unit-size);
    padding-right: var(--unit-size);

    background: var(--bg3);
    border-radius: var(--unit-size);

    transition: var(--cubic-transition);
}

summary:focus .icon-details-open,
summary:hover .icon-details-open {
    fill: var(--bg1);
    transition: var(--cubic-transition);
}

/* BACKGROUND IMG GRADIENT */
.bg {
    background-color: var(--bg3);
    background-position: center;
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

.anchor-hidden {
    display: none;
}

/* HEADER AND SIDEPANELS */
#header {
    z-index: 1;
    font-size: var(--main-size);

    height: 3rem;
    display: flex;
    position: fixed;
    top: 0;
    background-color: var(--bg1);

    width: 100%;
    align-items: center;
    padding: var(--unit-size);

    box-shadow: var(--shadow);
}

#instance {
    display: flex;
    align-items: center;
    align-self: center;
    margin-left: auto;
    margin-right: auto;
}

#instance h1 {
    margin-left: 4px;
}

.icon {
    fill: var(--white);
    align-self: center;
}

/* CURRENT PAGE LINK */
.active {
    font-weight: bold;
}

/* CONTAINS ALL ELEMENTS BESIDES HEADER */
.container {
    margin-top: 3rem;
    margin-left: 20%;
    margin-right: 20%;

    padding: var(--unit-size) var(--unit-size) 0 var(--unit-size);
}

/* THE FOCUSED (middle) DIV */
.content {
    display: flex;
    flex-direction: column;
    padding: var(--unit-size) var(--unit-size) 0 var(--unit-size);

    width: 100%;
}

.markdown-blocks {
    background-color: var(--translucent);
    border-radius: 0 0 var(--unit-size) var(--unit-size);
    border: solid 2px var(--bg2);
    border-top: solid 2px var(--bg3);
    padding: var(--unit-size);
}

.markdown-blocks ul {
    margin-left: 1em;
    list-style: disc;
}

.markdown-blocks ul li {
    margin-bottom: 0.2em;
}

.doc-navigation {
    background-color: var(--translucent);
    border-radius: var(--unit-size) var(--unit-size) 0 0;
    border: solid 2px var(--bg2);
    border-bottom: none;
    padding: var(--unit-size);
}

.doc-navigation ul {
    display: flex;
    justify-content: space-evenly;
    font-size: var(--main-size);
}

/* NOTES */
#replyform {
    padding: var(--unit-size);
    margin-top: var(--unit-size);
    background-color: var(--translucent);
    border-radius: var(--unit-size);
    display: flex;
    flex-direction: column;
    font-size: var(--small-size);
}
#replyform textarea {
    width: 100%;
    resize: vertical;
    margin-top: var(--unit-size);
    padding: var(--unit-size);
}

.h-entry {
    margin-top: var(--unit-size);
}
.h-entry hr {
    margin-top: 5px;
}
.h-entry a {
    text-decoration: underline;
}
.h-entry a:focus {
    animation-name: highlight;
    animation-duration: 500ms;
    animation-timing-function: ease-in-out;
}

.h-entry .embed header {
    padding: var(--unit-size);
}
.h-entry .embed .p-summary {
    padding: var(--unit-size);
}
.h-entry,
.note {
    background-color: var(--translucent);
    border-radius: var(--unit-size);
}

.h-entry .replies .h-entry {
    background-color: unset;
    padding: 0 var(--unit-size) var(--unit-size) 0;
    margin-left: var(--medium-size);
}

.note-info {
    display: flex;
    justify-content: space-between;
    align-items: center;

    border: solid 2px var(--bg2);
    border-bottom: unset;
    border-radius: var(--unit-size) var(--unit-size) 0 0;

    background-color: var(--translucent);
    font-size: var(--medium-size);
    padding: 5px 10px 5px 10px;
}

.note-author {
    font-size: var(--medium-size);
    font-weight: bold;
    display: flex;
    align-items: center;
    align-self: center;
}

.note-info .avatar {
    width: auto;
    height: var(--medium-size);
    border-radius: var(--unit-size);
    margin-right: 4px;
}

/* TODO: icons */
.note-actions {
    display: flex;
    vertical-align: middle;
}

.button-container {
    all: unset;
    border: none !important;
    width: 1em !important;
    height: 1em !important;
    background-size: cover !important;
    margin-left: 5px;
    text-indent: -9999em;
    text-transform: uppercase;
}

.button-container:hover,
.button-container:focus {
    border: none !important;
    background: var(--bg3) !important;
}

.favourite-button-container {
    -webkit-mask-image: url("../icons/heart.svg") !important;
    -o-mask-image: url("../icons/heart.svg") !important;
    -moz-mask-image: url("../icons/heart.svg") !important;
    mask-image: url("../icons/heart.svg") !important;
}
.reply-button-container {
    -webkit-mask-image: url("../icons/reply.svg") !important;
    -o-mask-image: url("../icons/reply.svg") !important;
    -moz-mask-image: url("../icons/reply.svg") !important;
    mask-image: url("../icons/reply.svg") !important;
}
.repeat-button-container {
    -webkit-mask-image: url("../icons/repeat.svg") !important;
    -o-mask-image: url("../icons/repeat.svg") !important;
    -moz-mask-image: url("../icons/repeat.svg") !important;
    mask-image: url("../icons/repeat.svg") !important;
}

.note-actions-unset {
    background: var(--bg2) !important;
}

.note-actions-set {
    background: var(--white) !important;
}

.note-content {
    border: solid 2px var(--bg2);
    border-top: unset;
    border-radius: 0 0 var(--unit-size) var(--unit-size);

    padding: var(--small-size);
}

.note-content p {
    padding-left: var(--small-size);
    padding-right: var(--small-size);
}

.note-attachments {
    display: flex;
    max-width: 100%;
}

.note-attachments > figure {
    display: flex;
    flex-direction: column;
    margin: 0;
    border-radius: var(--unit-size);
    background-color: var(--translucent);
    padding: var(--small-size);
}

.note-attachments > figure figcaption {
    display: flex;
    padding-top: var(--small-size);
}

.note-attachments > figure img,
.note-attachments > figure video {
    width: 100%;
    height: auto;
}

/* SECTIONS */
.section-widget {
    display: flex;
    flex-direction: column;
    width: 100%;

    background-color: var(--translucent);
    border-radius: var(--unit-size);
    border: solid 2px var(--bg2);

    color: var(--white);
}

.section-title-details {
    font-size: var(--main-size);
    font-weight: 700;

    border-radius: var(--unit-size);
    padding: 5px 10px 5px 10px;

    background-color: var(--translucent);
}
.section-title-details[open] svg {
    transform: rotate(180deg);
    animation: var(--fade-out)
}

/* SECTION DETAILS CLOSED */
.section-title-details:not([open]) svg {
    transform: initial;
    animation: var(--fade-in);
}

.section-title-summary {
    display: flex;
    justify-content: space-between;
}

.section-form {
    padding: var(--unit-size);
}
.form-group {
    margin-bottom: var(--unit-size);
}

.help-text {
    font-style: italic;
    font-size: var(--small-size);
}

.section-form-options {
    display: block !important;
    margin-bottom: var(--unit-size);
}

.section-form-textarea {
    border-radius: var(--unit-size);
    background-color: var(--translucent);
    color: var(--white);

    width: 100%;
    max-width: 100%;
    height: calc(6 * var(--main-size));

    border: 2px solid transparent;
    margin-top: var(--unit-size);
    margin-bottom: var(--unit-size);
    padding: var(--unit-size);
    resize: vertical;
}

/* BUTTONS AND INPUT SHENANIGANS */
label, button {
    font-weight: bold !important;
}

select,
button,
textarea,
input {
    font-size: inherit !important;
    display: block;
    position: relative;
    color: var(--white);
    padding: 2px 8px;
    border: 2px solid var(--bg2) !important;
    border-radius: var(--unit-size) !important;
    background-color: var(--translucent);
}
button {
    background: var(--bg-button);
    padding: 5px 10px;
}

select {
    -webkit-appearance: none !important;
    -moz-appearance: none !important;

    background-repeat: no-repeat;
    background-size: 16px;
    background-position: center right 5px;

    color: var(--white) !important;
    border: 2px solid var(--bg2);
    border-radius: var(--unit-size);
}

input[type=radio] {
    border: solid 0.25em var(--bg2) !important;
    background-color: var(--bg1) !important;
}

input[type=checkbox] {
    background-color: var(--bg2) !important;
    background-size: cover;
    margin-left: 5px;

    -webkit-mask-image: url("../icons/check-off.svg") !important;
    -o-mask-image: url("../icons/check-off.svg") !important;
    -moz-mask-image: url("../icons/check-off.svg") !important;
    mask-image: url("../icons/check-off.svg") !important;
}

/* DISABLED STATE TEXT COLOR */
:is(:disabled, :disabled:active)::file-selector-button,
button:is(:disabled, :disabled:active),
input:is([type=reset], [type=button], [type=submit]):is(:disabled, :disabled:active),
select:is(:disabled, :disabled:active) > button {
    color: var(--white) !important;
}

/* HOVER AND FOCUS */
textarea:hover,
textarea:focus,
button:hover,
button:focus,
input:hover,
input:focus {
    border: solid 2px var(--bg3) !important;
    color: var(--white) !important;
}
select:hover,
select:focus {
    border-color: var(--bg3) !important;
}

input[type=checkbox]:hover,
input[type=checkbox]:focus {
    background-color: var(--bg3) !important;
}

input[type=radio]:checked {
    background-color: var(--white) !important;
}

input[type=checkbox]:checked {
    background-color: var(--bg3) !important;
    -webkit-mask-image: url("../icons/check-on.svg") !important;
    -o-mask-image: url("../icons/check-on.svg") !important;
    -moz-mask-image: url("../icons/check-on.svg") !important;
    mask-image: url("../icons/check-on.svg") !important;
}

/* file selector */
input[type=file] {
    font-family: var(--main-font) !important;
    font-weight: normal !important;
    background: var(--bg-button);
    border: 2px solid var(--bg2);
    border-radius: var(--unit-size);
}

/* button part of file selector */
::file-selector-button {
    font-family: var(--main-font) !important;
    font-weight: bold !important;
    color: var(--white) !important;
}

/* ACCESSIBILITY MENU */
.accessibility-menu {
    display: block;
    position: absolute;
    z-index: 999;

    top: -100%;
    left: -100%;
    width: 1px;
    height: 1px;
}

.accessibility-menu ul {
    list-style-type: disc;
}

#anchor-menu:target + .accessibility-menu:focus-within,
.accessibility-menu:focus-within {
    top: var(--unit-size);
    left: var(--unit-size);
    width: 30%;
    height: min-content;

    background-color: var(--bg1);
    padding: var(--unit-size);
    border: solid 2px var(--bg3);
    border-radius: var(--unit-size);
    box-shadow: var(--shadow);
}

.anchor-hidden {
    width: 1px;
    height: 1px;
    overflow: hidden;
}

/* ANIMATIONS */
@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: translateY(-10px);
    }

    100% {
        opacity: unset;
        transform: none;
    }
}

@keyframes fadeOut {
    100% {
        opacity: 0;
        transform: translateY(-10px);
    }

    0% {
        opacity: unset;
        transform: none;
    }
}

@keyframes highlight {
    0% {
        box-shadow: initial;
        border-radius: var(--unit-size);
    }

    50% {
        border-radius: var(--unit-size);
        box-shadow: inset 0 20px 40px var(--white);
        transition: box-shadow 0.3s ease-in-out;
    }

    100% {
        box-shadow: initial;
        border-radius: var(--unit-size);
    }
}

/* MEDIA QUERIES */
/* sidepanels need to be shown by default on desktop, hidden on mobile */
.panel .panel-content {
    display: flex;
    flex-direction: column;
    font-size: var(--small-size);

    /* should remain in place for the user */
    position: fixed;
    top: 0;

    /* should be bellow header */
    margin-top: 3rem;

    /* should occupy the entire vertical real estate */
    height: calc(100% - 3rem);

    padding: var(--unit-size);
}

@media (min-width: 1200px) {
    #panel-left-icon,
    #panel-right-icon {
        display: none;
    }

    .panel .panel-content {
        width: 100%;
        max-width: 20%;
    }

    a[id|="anchor"]:target + * {
        animation-name: highlight;
        animation-duration: 600ms;
        animation-timing-function: ease-in-out;
    }
}

@media (max-width: 1200px) {
    /* content should occupy the entire width at this size */
    .container {
        margin-left: unset;
        margin-right: unset;
    }

    .content {
        max-width: 100%;
    }

    #panel-left-toggle:not(:checked) ~ .panel-content,
    #panel-right-toggle:not(:checked) ~ .panel-content {
        display: none;
    }

    #panel-left-toggle:checked ~ .panel-content,
    #panel-right-toggle:checked ~ .panel-content,
    a[id|="anchor"]:target ~ .panel-content {
        display: flex !important;

        width: 100%;
        background-color: var(--bg2);
        background-image: url(../images/bg.png);
        background-position: center;
        background-repeat: no-repeat;
        background-size: 100% 100%;
        z-index: auto;
    }

    @media (prefers-color-scheme: dark) {
        #panel-left-toggle:checked ~ .panel-content,
        #panel-right-toggle:checked ~ .panel-content,
        a[id|="anchor"]:target ~ .panel-content {
            background-image: url(../images/bg.png);
        }
    }
    @media (prefers-color-scheme: light) {
        #panel-left-toggle:checked ~ .panel-content,
        #panel-right-toggle:checked ~ .panel-content,
        a[id|="anchor"]:target ~ .panel-content {
            background-image: url(../images/bg-light.png);
        }
    }
}