:root{--bg:#fff;--fg:#1b1e23;--muted:#5d6570;--line:#d9dde3;--accent:#3b5bdb;--accent-fg:#fff;--surface:#f4f6f8;--danger:#c92a2a}
@media (prefers-color-scheme:dark){:root{--bg:#14161a;--fg:#e6e8eb;--muted:#9aa3ad;--line:#2d333b;--accent:#748ffc;--accent-fg:#101319;--surface:#1c2026;--danger:#ff8787}}
*{box-sizing:border-box}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:1rem/1.5 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
main{max-width:640px;margin:0 auto;padding:1rem 1rem calc(4.5rem + env(safe-area-inset-bottom))}
h1{font-size:1.4rem;margin:.5rem 0 1rem}
a{color:var(--accent)}
.muted{color:var(--muted)}
.error{color:var(--danger);margin:0}
.stack{display:flex;flex-direction:column;gap:.75rem}
input,textarea,select{font:inherit;color:inherit;background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:.6rem .75rem;min-height:44px;width:100%}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:0 1.25rem;border:0;border-radius:8px;background:var(--accent);color:var(--accent-fg);font:inherit;font-weight:600;cursor:pointer}
.btn.secondary{background:var(--surface);color:var(--fg);border:1px solid var(--line)}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
/* Tab bar: bottom on narrow screens, top bar on wide ones. */
.tabs{position:fixed;left:0;right:0;bottom:0;display:flex;background:var(--bg);border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);z-index:10}
.tabs a{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:56px;min-width:44px;color:var(--muted);text-decoration:none;font-size:.75rem}
.tabs a[aria-current=page]{color:var(--accent);font-weight:600}
.tabs .ico{font-size:1.25rem;line-height:1}
.tabs .brand{display:none}
@media (min-width:720px){
  main{padding:1rem 1rem 2rem}
  .tabs{position:sticky;top:0;bottom:auto;border-top:0;border-bottom:1px solid var(--line);padding:0 1rem;justify-content:center;gap:.5rem}
  .tabs a{flex:0 0 auto;flex-direction:row;gap:.4rem;min-height:48px;padding:0 .75rem;font-size:1rem}
  .tabs .brand{display:flex;color:var(--fg);font-weight:700;margin-right:auto}
}
/* Posts */
.post{border-bottom:1px solid var(--line);padding:.75rem 0}
.post header{display:flex;align-items:center;gap:.5rem}
.post .author{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:inherit;text-decoration:none}
.post time{font-size:.85rem}
.avatar{width:40px;height:40px;border-radius:8px;background:var(--surface);flex:none;display:inline-block}
.boosted{margin:0 0 .25rem;font-size:.85rem}
.content{overflow-wrap:anywhere}
.content p{margin:.5rem 0}
.label{display:inline-block;margin:.5rem 0 0;padding:0 .5rem;border:1px solid var(--line);border-radius:999px;font-size:.75rem;color:var(--muted)}
details.cw,details.curated-hidden,details.original{margin:.5rem 0;padding:.25rem .75rem;border:1px solid var(--line);border-radius:8px;background:var(--surface)}
details>summary{cursor:pointer;min-height:44px;display:flex;align-items:center}
.media{display:grid;gap:.5rem;margin:.5rem 0}
.media img,.media video{width:100%;max-height:480px;object-fit:contain;border-radius:8px}
.sens{position:relative;display:block;cursor:pointer}
.sens input:not(:checked)~img,.sens input:not(:checked)~video{filter:blur(28px)}
.sens input:checked~.sens-note{display:none}
.sens-note{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;z-index:1;font-size:.9rem;font-weight:600;color:#fff;text-shadow:0 0 4px #000;text-align:center;padding:1rem}
.actions{display:flex;gap:.25rem;margin-top:.25rem}
.act{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px;padding:0 .75rem;border:0;background:none;color:var(--muted);font:inherit;font-size:.9rem;cursor:pointer;text-decoration:none}
.pill{display:block;text-align:center;margin:0 0 .75rem;padding:.5rem;border-radius:999px;background:var(--accent);color:var(--accent-fg);text-decoration:none;font-weight:600}
/* Threads */
.thread-node{border-left:2px solid transparent}
.thread-node.hl{border-left-color:var(--accent);background:var(--surface)}
.thread-node .replying{margin:.5rem 0 0;font-size:.85rem}
.depth-1{margin-left:.75rem}.depth-2{margin-left:1.5rem}.depth-3{margin-left:2.25rem}.depth-4{margin-left:3rem}.depth-5{margin-left:3.75rem}.depth-6{margin-left:4.5rem}
/* Profiles */
.profile-head{display:flex;gap:1rem;align-items:center;margin-bottom:.5rem}
.profile-head .avatar{width:64px;height:64px}
.profile-head h1{margin:0}
.bio{overflow-wrap:anywhere}
/* Composer and actions */
.act.on{color:var(--accent);font-weight:600}
.act:disabled{opacity:.5;cursor:default}
.composer{margin:.5rem 0 1rem}
.composer textarea{resize:vertical;min-height:7rem}
.composer-row{display:flex;gap:.5rem;align-items:center}
.composer-row select{flex:1}
.count{min-width:3.5rem;text-align:right}
.count.over{color:var(--danger);font-weight:600}
.attach-row{display:flex;flex-direction:column;gap:.25rem;margin:.5rem 0}
.tabs a{position:relative}
.badge{position:absolute;top:6px;left:calc(50% + 6px);min-width:1.1rem;padding:0 .3rem;border-radius:.6rem;background:var(--danger);color:var(--accent-fg);font-size:.7rem;line-height:1.1rem;text-align:center}
.badge[hidden]{display:none}
.filters{display:flex;gap:1rem;margin:.5rem 0}
.filters a[aria-current=page]{font-weight:600;color:var(--fg)}
.notification{border-bottom:1px solid var(--line);padding:.5rem 0}
.notification.unread{border-left:3px solid var(--accent);padding-left:.5rem}
.notification .post{border-bottom:0}
/* Safety settings */
.safety-row{display:flex;gap:.75rem;align-items:center;justify-content:space-between;margin:.25rem 0}
.safety-row span{min-width:0;overflow-wrap:anywhere}