/*
* Page-level styles for birta viewer.
* Theme colors are inherited from github-markdown-css which defines
* --bgColor-default, --fgColor-default, etc. via [data-theme] and
* @media (prefers-color-scheme) selectors on .markdown-body.
*
* For the header and status bar (outside .markdown-body), we define
* our own variables that mirror the github-markdown-css palette.
*/
:root {
--birta-fg: #1f2328;
--birta-bg: #ffffff;
--birta-bg-secondary: #f6f8fa;
--birta-border: #d1d9e0;
}
[data-theme="dark"] {
--birta-fg: #e6edf3;
--birta-bg: #0d1117;
--birta-bg-secondary: #161b22;
--birta-border: #30363d;
}
@media (prefers-color-scheme: dark) {
:root:not([data-theme="light"]) {
--birta-fg: #e6edf3;
--birta-bg: #0d1117;
--birta-bg-secondary: #161b22;
--birta-border: #30363d;
}
}
* {
box-sizing: border-box;
}
html, body {
margin: 0;
padding: 0;
background-color: var(--birta-bg);
color: var(--birta-fg);
transition: background-color 0.2s, color 0.2s;
}
.header {
position: sticky;
top: 0;
z-index: 100;
display: flex;
align-items: center;
justify-content: space-between;
padding: 8px 24px;
background-color: var(--birta-bg-secondary);
border-bottom: 1px solid var(--birta-border);
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", Helvetica, Arial, sans-serif;
font-size: 14px;
color: var(--birta-fg);
transition: transform 0.3s ease, opacity 0.3s ease;
}
.header.header-hidden {
display: none;
}
.header-left {
display: flex;
align-items: center;
gap: 8px;
min-width: 0;
}
.filename {
font-weight: 600;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
.header-right {
display: flex;
align-items: center;
gap: 16px;
}
.theme-controls {
display: flex;
align-items: center;
gap: 8px;
}
.theme-select {
background: var(--birta-bg-secondary);
border: 1px solid var(--birta-border);
border-radius: 6px;
padding: 4px 8px;
cursor: pointer;
color: var(--birta-fg);
font-family: inherit;
font-size: 13px;
line-height: 1.4;
transition: border-color 0.2s;
appearance: auto;
}
.theme-select:hover {
border-color: var(--birta-fg);
}
.theme-select option {
background: var(--birta-bg);
color: var(--birta-fg);
}
.reading-toggle,
.theme-toggle {
display: flex;
align-items: center;
justify-content: center;
background: none;
border: 1px solid var(--birta-border);
border-radius: 6px;
padding: 4px 8px;
cursor: pointer;
color: var(--birta-fg);
font-size: 14px;
line-height: 1;
transition: border-color 0.2s;
}
.reading-toggle:hover,
.theme-toggle:hover {
border-color: var(--birta-fg);
}
.theme-toggle.disabled {
opacity: 0.25;
cursor: default;
pointer-events: none;
}
.theme-toggle svg {
display: none;
}
.container {
max-width: 1012px;
margin: 24px auto;
padding: 0;
border: 1px solid var(--birta-border);
border-radius: 6px;
}
.container .markdown-body {
padding: 40px;
}
/* File header bar — GitHub-style */
.file-header {
display: flex;
align-items: center;
gap: 8px;
padding: 8px 16px;
background-color: var(--birta-bg-secondary);
border-bottom: 1px solid var(--birta-border);
border-radius: 6px 6px 0 0;
font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
font-size: 12px;
line-height: 32px;
}
.file-header-icon {
flex-shrink: 0;
opacity: 0.6;
}
.file-header-name {
font-weight: 600;
white-space: nowrap;
overflow: hidden;
text-overflow: ellipsis;
}
@media (max-width: 767px) {
.container .markdown-body {
padding: 16px;
}
.header {
padding: 8px 16px;
}
}
.status {
position: fixed;
bottom: 12px;
right: 12px;
padding: 4px 10px;
border-radius: 12px;
font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
font-size: 12px;
background-color: var(--birta-bg-secondary);
border: 1px solid var(--birta-border);
color: var(--birta-fg);
opacity: 0;
transition: opacity 0.3s;
pointer-events: none;
}
.status.visible {
opacity: 1;
}
/* --- Reading mode --- */
body.reading-mode .header {
transform: translateY(-100%);
pointer-events: none;
opacity: 0;
}
body.reading-mode .file-header {
display: none;
}
body.reading-mode .container {
border-color: transparent;
margin-top: 0;
}
.reading-progress {
display: none;
position: fixed;
top: 0;
left: 0;
height: 3px;
width: 0;
background-color: var(--birta-fg);
opacity: 0.25;
z-index: 200;
pointer-events: none;
transition: width 80ms linear;
}
.reading-exit-zone {
display: none;
position: fixed;
top: 0;
left: 0;
right: 0;
height: 12px;
z-index: 300;
}
.reading-exit-bar {
position: fixed;
top: 8px;
right: 16px;
z-index: 301;
transform: translateY(-48px);
transition: transform 0.2s ease, opacity 0.2s ease;
opacity: 0;
pointer-events: none;
}
.reading-exit-zone:hover ~ .reading-exit-bar,
.reading-exit-bar:hover {
transform: translateY(0);
opacity: 1;
pointer-events: auto;
}
.reading-exit-btn {
display: flex;
align-items: center;
justify-content: center;
width: 28px;
height: 28px;
background-color: var(--birta-bg-secondary);
border: 1px solid var(--birta-border);
border-radius: 6px;
color: var(--birta-fg);
cursor: pointer;
transition: border-color 0.2s;
}
.reading-exit-btn:hover {
border-color: var(--birta-fg);
}
/* Override inline background-color from syntect on themed code blocks */
.markdown-body .highlight pre[style],
.markdown-body pre[style] {
background-color: var(--bgColor-muted) !important;
}
/* Heading anchor links — GitHub-style hover-reveal */
.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4,
.markdown-body h5,
.markdown-body h6 {
position: relative;
}
.markdown-body .anchor {
float: left;
padding-right: 4px;
margin-left: -20px;
line-height: 1;
}
.markdown-body .anchor::before {
content: "";
display: inline-block;
width: 16px;
height: 16px;
vertical-align: middle;
background-color: var(--birta-fg);
opacity: 0;
transition: opacity 0.15s;
-webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a2.002 2.002 0 0 0 0 2.83Z'/%3E%3C/svg%3E");
mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath d='m7.775 3.275 1.25-1.25a3.5 3.5 0 1 1 4.95 4.95l-2.5 2.5a3.5 3.5 0 0 1-4.95 0 .751.751 0 0 1 .018-1.042.751.751 0 0 1 1.042-.018 1.998 1.998 0 0 0 2.83 0l2.5-2.5a2.002 2.002 0 0 0-2.83-2.83l-1.25 1.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042Zm-4.69 9.64a1.998 1.998 0 0 0 2.83 0l1.25-1.25a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042l-1.25 1.25a3.5 3.5 0 1 1-4.95-4.95l2.5-2.5a3.5 3.5 0 0 1 4.95 0 .751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018 1.998 1.998 0 0 0-2.83 0l-2.5 2.5a2.002 2.002 0 0 0 0 2.83Z'/%3E%3C/svg%3E");
-webkit-mask-size: 16px 16px;
mask-size: 16px 16px;
}
.markdown-body h1:hover .anchor::before,
.markdown-body h2:hover .anchor::before,
.markdown-body h3:hover .anchor::before,
.markdown-body h4:hover .anchor::before,
.markdown-body h5:hover .anchor::before,
.markdown-body h6:hover .anchor::before,
.markdown-body .anchor:focus::before {
opacity: 0.5;
}
.markdown-body h1:hover .anchor::before:hover,
.markdown-body .anchor:focus::before {
opacity: 1;
}
