:root { color-scheme: light dark; --background: #f2f3f0; --text: #000; --secondary: #777570; --accent: #008c95; --surface: #e9ece6; --border: #d5dcd7; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif; color: var(--text); background: var(--background); -webkit-font-smoothing: antialiased; }
@media (prefers-color-scheme: dark) { :root { --background: #1c1c1a; --text: #f5f3ed; --secondary: #aaa8a2; --accent: #54cad0; --surface: #272724; --border: #484841; } }
* { box-sizing: border-box; }
body { margin: 0; padding-bottom: var(--preview-note-height, 150px); }
a { color: inherit; text-underline-offset: 4px; }
button { font: inherit; color: inherit; }
button { cursor: pointer; background: transparent; border: 1px solid var(--border); border-radius: 8px; padding: 10px 16px; }
button:hover { background: var(--surface); }
button:disabled { opacity: .6; cursor: wait; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }
[hidden] { display: none !important; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
main { width: min(100% - 32px, 760px); margin: auto; }
svg { fill: none; stroke: currentColor; stroke-width: 1.5; stroke-linejoin: round; }
nav { display: flex; align-items: center; gap: 8px; overflow-x: auto; scrollbar-width: none; padding: 4px 0 10px; }
nav::-webkit-scrollbar { display: none; }
#subject-tabs { display: flex; gap: 8px; }
nav button { flex-shrink: 0; white-space: nowrap; border: 0; border-radius: 0; padding: 10px 1rem; margin-inline: -.5rem; position: relative; font-size: 15px; min-height: 44px; }
nav button[aria-pressed="true"] { font-weight: 600; }
nav button[aria-pressed="true"]::after { content: ''; position: absolute; bottom: 0; left: 1rem; right: 1rem; height: 3px; border-radius: 2px; background: var(--accent); }
h2 { font-size: 15px; font-weight: 600; margin: 0; }
#note, .muted, #status { color: var(--secondary); font-size: 14px; line-height: 1.5; }
#note:empty, #status:empty, .notice:empty, #taxonomy-status:empty { display: none; }
.notice { color: var(--accent); font-size: 14px; }
.topic { display: flex; align-items: center; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.forum-icon { width: 36px; height: 36px; flex-shrink: 0; border-radius: 9px; background: var(--surface); color: var(--secondary); position: relative; overflow: hidden; }
.forum-icon > svg { width: 22px; height: 22px; margin: 7px; }
.forum-icon > img { position: absolute; inset: 0; width: 36px; height: 36px; object-fit: contain; background: var(--background); }
.topic-content { flex: 1; min-width: 0; }
.topic h3 { font-size: 18px; line-height: 22px; margin: 0; overflow-wrap: anywhere; font-weight: 600; }
.topic h3 a { text-decoration: none; }
.topic h3 a:hover { color: var(--accent); }
.meta { color: var(--secondary); font-size: 13px; line-height: 18px; margin: 7px 0 0; display: flex; align-items: center; gap: 6px; }
.forum-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.replies { display: inline-flex; align-items: center; gap: 3px; flex-shrink: 0; }
.replies svg { width: 12px; height: 12px; stroke-width: 1.2; }
@media (max-width: 540px) { .topic { gap: 12px; } }
#reader { width: min(100% - 32px, 760px); margin: auto; }
.reader-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 12px 0 24px; font-size: 14px; color: var(--accent); }
#reader-title { font-size: 24px; line-height: 1.25; font-weight: 600; }
#reader-title:focus { outline: none; }
#reader-status { font-size: 15px; color: var(--secondary); line-height: 1.5; }
#reader-status:empty { display: none; }
#reader-body { font-size: 16px; line-height: 1.65; overflow-wrap: anywhere; padding-top: 12px; }
#reader-body h1, #reader-body h2, #reader-body h3 { font-size: 1.2em; margin: 1.5em 0 .6em; line-height: 1.3; }
#reader-body a { color: var(--accent); }
#reader-body pre { overflow: auto; padding: 12px; background: var(--surface); border-radius: 8px; }
#reader-body code { font-size: .85em; }
#reader-body blockquote { margin: 16px 0; border-left: 3px solid var(--border); padding-left: 16px; color: var(--secondary); }
#reader-body table { display: block; overflow: auto; border-collapse: collapse; }
#reader-body th, #reader-body td { border: 1px solid var(--border); padding: 6px 10px; }
#reader-body hr { border: 0; border-top: 1px solid var(--border); margin: 24px 0; }

.app-header { position: sticky; top: 0; z-index: 10; background: var(--background); border-bottom: 1px solid var(--border); }
.app-nav, .reader-toolbar { width: min(100% - 32px, 760px); margin-inline: auto; }
.reader-toolbar { padding-bottom: 12px; }
#reader { padding-top: 20px; }
.preview-limit { position: fixed; inset: auto 0 0; z-index: 20; padding: 12px 16px max(12px, env(safe-area-inset-bottom)); border-top: 1px solid #ffffff30; background: rgb(0 140 149 / 50%); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); }
.preview-limit p { max-width: 760px; margin: auto; color: #fff; font-size: 12px; line-height: 1.5; }

.reader-location { display: flex; align-items: center; gap: 12px; min-width: 0; }
#reader-back { flex-shrink: 0; width: 44px; height: 44px; padding: 10px; border: 0; }
#reader-back svg { display: block; width: 24px; height: 24px; stroke-width: 2; stroke-linecap: round; }
#reader-forum { color: var(--text); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#reader-original { flex-shrink: 0; }
@media (max-width: 420px) { .reader-toolbar { gap: 8px; font-size: 12px; } .reader-location { gap: 8px; } }
.reader-post { padding: 24px 0; }
.reader-post + .reader-post { border-top: 1px solid var(--border); }
.reader-post:first-child { padding-top: 8px; }
.post-author { display: flex; align-items: center; gap: 8px; margin-bottom: 16px; min-width: 0; line-height: 20px; }
.post-avatar { position: relative; flex: 0 0 28px; width: 28px; height: 28px; overflow: hidden; border-radius: 50%; color: var(--secondary); }
.post-avatar svg, .post-avatar img { width: 28px; height: 28px; display: block; }
.post-avatar img { position: absolute; inset: 0; object-fit: cover; }
.post-username { font-size: 15px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.post-date { margin-left: auto; flex-shrink: 0; color: var(--secondary); font-size: 12px; font-weight: 400; }
.post-body > :first-child { margin-top: 0; }
.post-body > :last-child { margin-bottom: 0; }