:root {
  --bg: #07070a;
  --bg-mid: #120e17;
  --bg-hover: #1c1523;
  --border: #2a2233;
  --text: #e7edf3;
  --text-dim: #8b98a5;
  --text-dimmer: #5b6773;
  --accent: #1185fe;
  --accent2: #00c6ff;
  --accent-dim: #0d2b47;
  --like: #ec4899;
  --repost: #00ba7c;
  --quote: #1185fe;
  --danger: #ff3860;
  --radius: 14px;
  --maxw: 1250px;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, system-ui, sans-serif;
  font-size: 15px;
  line-height: 1.4;
  min-height: 100vh;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; }
textarea { font-family: inherit; }

.shell {
  max-width: var(--maxw);
  margin: 0 auto;
  display: flex;
  align-items: flex-start;
  min-height: 100vh;
}

/* ---------- left nav ---------- */
.nav {
  width: 275px;
  flex-shrink: 0;
  position: sticky;
  top: 0;
  height: 100vh;
  display: flex;
  flex-direction: column;
  padding: 8px 12px;
  border-right: 1px solid var(--border);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  font-weight: 800;
  font-size: 20px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.nav-logo .wing { font-size: 24px; filter: none; -webkit-text-fill-color: initial; }
.nav-items { display: flex; flex-direction: column; gap: 2px; margin-top: 8px; }
.nav-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 11px 12px;
  border-radius: 999px;
  font-size: 19px;
  font-weight: 500;
  cursor: pointer;
  color: var(--text);
}
.nav-item:hover { background: var(--bg-hover); }
.nav-item.active { font-weight: 800; }
.nav-item .ic { position: relative; width: 24px; text-align: center; font-size: 20px; }
.nav-badge {
  position: absolute; top: -6px; right: -10px; min-width: 16px; height: 16px; padding: 0 4px;
  border-radius: 999px; background: var(--accent); color: #ffffff; font-size: 10px; font-weight: 800;
  line-height: 16px; text-align: center; box-shadow: 0 0 0 2px var(--bg);
}
.nav-cta {
  margin: 14px 4px;
  padding: 12px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #ffffff;
  text-align: center;
  font-weight: 800;
  font-size: 15px;
  cursor: pointer;
}
.nav-cta:hover { filter: brightness(1.08); }
.nav-spacer { flex: 1; }
.nav-foot { font-size: 12px; color: var(--text-dimmer); padding: 8px 12px 16px; line-height: 1.6; }
.nav-foot a { color: var(--text-dim); text-decoration: underline; }

/* ---------- sim banner ---------- */
.sim-banner {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 4px 10px;
  padding: 9px 12px;
  border-radius: 12px;
  background: var(--accent-dim);
  border: 1px solid #123a5c;
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.5;
}
.sim-banner b { color: var(--accent); }
.sim-banner-top { display: none; }

/* ---------- main column ---------- */
.main { flex: 1; min-width: 0; max-width: 600px; border-right: 1px solid var(--border); min-height: 100vh; }
.main-header {
  position: sticky;
  top: 0;
  z-index: 5;
  background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
}
.main-header h1 { margin: 0; font-size: 20px; }
.main-header .sub { color: var(--text-dim); font-size: 13px; margin-top: 2px; }
.back-row { display: flex; align-items: center; gap: 18px; }
.back-btn { font-size: 18px; cursor: pointer; padding: 4px; border-radius: 999px; }
.back-btn:hover { background: var(--bg-hover); }

.tabs { display: flex; border-bottom: 1px solid var(--border); }
.tab { flex: 1; text-align: center; padding: 14px 8px; color: var(--text-dim); font-weight: 600; cursor: pointer; border-bottom: 2px solid transparent; font-size: 14px; white-space: nowrap; }
.tab:hover { background: var(--bg-hover); }
.tab.active { color: var(--text); border-bottom-color: var(--accent); }

/* ---------- composer ---------- */
.composer { display: flex; gap: 10px; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.composer-avatar { flex-shrink: 0; }
.composer-body { flex: 1; min-width: 0; }
.composer textarea {
  width: 100%;
  min-height: 90px;
  border: none;
  background: transparent;
  color: var(--text);
  font-size: 18px;
  resize: vertical;
  outline: none;
  line-height: 1.35;
}
.composer textarea::placeholder { color: var(--text-dimmer); }
.composer-persona {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--text-dim);
}
.composer-persona input {
  border: 1px solid var(--border);
  background: var(--bg-mid);
  color: var(--text);
  border-radius: 999px;
  padding: 4px 10px;
  font-size: 13px;
  width: 140px;
  outline: none;
}
.composer-persona input:focus { border-color: var(--accent); }
.composer-persona .ph { color: var(--text-dimmer); }
.composer-foot { display: flex; align-items: center; justify-content: flex-end; gap: 12px; margin-top: 6px; }
.char-count { font-size: 13px; color: var(--text-dim); font-variant-numeric: tabular-nums; }
.char-count.over { color: var(--danger); font-weight: 700; }
.post-btn {
  border: none;
  padding: 9px 20px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #ffffff;
  font-weight: 800;
  font-size: 14.5px;
  cursor: pointer;
}
.post-btn:disabled { opacity: .4; cursor: default; filter: none; }
.post-btn:not(:disabled):hover { filter: brightness(1.08); }
.composer-hint { padding: 0 16px 14px; font-size: 12.5px; color: var(--text-dimmer); }

/* ---------- post card ---------- */
.post { display: flex; gap: 10px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
.post-avatar img, .avatar-img, .avatar-gen {
  width: 42px; height: 42px; border-radius: 999px; object-fit: cover; background: var(--bg-mid);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 15px; color: #fff; flex-shrink: 0;
}
.avatar-gen.sm { width: 32px; height: 32px; font-size: 12px; }
.post-body { flex: 1; min-width: 0; }
.post-head { display: flex; align-items: baseline; gap: 4px; flex-wrap: wrap; font-size: 14.5px; }
.post-name { font-weight: 700; }
.post-handle, .post-time, .post-dot { color: var(--text-dim); }
.blowup-badge { font-size: 11.5px; background: var(--accent-dim); color: var(--accent2); border-radius: 999px; padding: 1px 8px; font-weight: 700; }
.post-text { margin-top: 2px; white-space: pre-wrap; word-wrap: break-word; font-size: 15px; }
.reply-context { color: var(--text-dim); font-size: 13px; margin-bottom: 2px; }

.post-actions { display: flex; justify-content: space-between; max-width: 425px; margin-top: 8px; color: var(--text-dim); }
.act { display: flex; align-items: center; gap: 6px; padding: 6px 8px; margin: -6px -8px; border-radius: 999px; font-size: 13px; }
.act.clickable { cursor: pointer; }
.act.clickable:hover { background: var(--bg-hover); }
.act.reply:hover { color: var(--accent); }
.act.repost:hover { color: var(--repost); }
.act.like:hover { color: var(--like); }
.act.liked { color: var(--like); }
.act.reposted { color: var(--repost); }
.act .icon { display: inline-block; }
.act .icon.pop { animation: pop .4s ease; }
@keyframes pop {
  0% { transform: scale(1); }
  35% { transform: scale(1.5) rotate(-8deg); }
  60% { transform: scale(.9) rotate(4deg); }
  100% { transform: scale(1) rotate(0); }
}
.count-fresh { animation: flash .6s ease; }
@keyframes flash { 0% { color: var(--accent2); } 100% { color: inherit; } }

/* ---------- quote embed ---------- */
.quote { border: 1px solid var(--border); border-radius: 12px; padding: 10px 12px; margin-top: 6px; }
.quote-head { display: flex; align-items: center; gap: 6px; font-size: 13.5px; }
.quote-head .avatar-gen { width: 20px; height: 20px; font-size: 9px; }
.quote-text { margin-top: 4px; font-size: 14px; white-space: pre-wrap; color: var(--text-dim); }

/* ---------- thread focus (original post) ---------- */
.thread-focus { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.thread-focus .post-head-full { display: flex; align-items: center; gap: 10px; }
.thread-focus .post-head-full .avatar-gen { width: 46px; height: 46px; font-size: 17px; }
.thread-focus .post-text { font-size: 20px; margin-top: 12px; }
.thread-focus .thread-time { color: var(--text-dim); font-size: 14px; margin-top: 12px; }
.stat-row { display: flex; gap: 18px; padding: 10px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); margin-top: 12px; font-size: 14px; flex-wrap: wrap; }
.stat-row b { color: var(--text); }
.stat-row span { color: var(--text-dim); }
.thread-focus .post-actions { max-width: 100%; padding: 10px 0 0; }

.section-label { padding: 14px 16px 4px; font-size: 13px; font-weight: 800; color: var(--text-dim); text-transform: uppercase; letter-spacing: .03em; }
.more-note { padding: 14px 16px; color: var(--text-dim); font-size: 13.5px; border-bottom: 1px solid var(--border); }
.more-note b { color: var(--text); }

/* ---------- notifications ---------- */
.notif-row { display: flex; gap: 12px; padding: 14px 16px; border-bottom: 1px solid var(--border); cursor: pointer; }
.notif-row:hover { background: var(--bg-hover); }
.notif-row.unread { background: color-mix(in srgb, var(--accent) 6%, transparent); }
.notif-body { flex: 1; min-width: 0; }
.notif-line { font-size: 14.5px; }
.notif-excerpt { color: var(--text-dim); font-size: 13.5px; margin-top: 3px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.notif-time { color: var(--text-dimmer); font-size: 12px; margin-top: 4px; }

/* ---------- profile ---------- */
.profile-head { display: flex; align-items: center; gap: 12px; padding: 16px; border-bottom: 1px solid var(--border); }
.profile-count { padding: 10px 16px; color: var(--text-dim); font-size: 13.5px; border-bottom: 1px solid var(--border); }
.profile-post { display: flex; cursor: pointer; }
.profile-post:hover { background: var(--bg-hover); }

/* ---------- share bar ---------- */
.share-bar { display: flex; gap: 10px; flex-wrap: wrap; padding: 14px 16px; border-bottom: 1px solid var(--border); }
.pill-btn { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 999px; border: 1px solid var(--border); font-weight: 700; font-size: 13.5px; cursor: pointer; background: transparent; color: var(--text); }
.pill-btn:hover { background: var(--bg-hover); }
.pill-btn.primary { background: linear-gradient(90deg, var(--accent), var(--accent2)); color: #ffffff; border-color: transparent; }
.pill-btn.primary:hover { filter: brightness(1.08); }

/* ---------- right column ---------- */
.aside { width: 350px; flex-shrink: 0; padding: 8px 16px; display: flex; flex-direction: column; gap: 14px; }
.aside-card { background: var(--bg-mid); border-radius: var(--radius); padding: 14px; }
.aside-card h2 { font-size: 17px; margin: 0 0 8px; }
.aside-card p { font-size: 13.5px; color: var(--text-dim); margin: 0 0 8px; line-height: 1.5; }
.aside-card a.link { color: var(--accent); }
.aside-foot { font-size: 12px; color: var(--text-dimmer); line-height: 1.7; padding: 4px; }
.aside-foot a { text-decoration: underline; }

/* ---------- toast ---------- */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translate(-50%, 12px); z-index: 70;
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 999px;
  font-size: 13.5px; font-weight: 600; opacity: 0; transition: opacity .2s, transform .2s;
  box-shadow: 0 10px 30px rgba(0, 0, 0, .3); max-width: 90vw; text-align: center;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }
.toast b { color: var(--accent2); }
.toast.clickable { cursor: pointer; }
.toast.clickable:hover { filter: brightness(1.1); }
.toast.notif-toast { background: var(--bg-mid); color: var(--text); border: 1px solid var(--border); box-shadow: 0 10px 30px rgba(0, 0, 0, .5); }

/* ---------- misc ---------- */
.center-msg { padding: 60px 24px; text-align: center; color: var(--text-dim); }
.center-msg h2 { color: var(--text); font-size: 18px; }
.load-more { display: block; width: 100%; padding: 16px; text-align: center; color: var(--accent); font-weight: 700; cursor: pointer; border-bottom: 1px solid var(--border); }
.load-more:hover { background: var(--bg-hover); }

.mobile-topbar { display: none; }
.mobile-tabbar { display: none; }

@media (max-width: 1080px) { .aside { display: none; } }
@media (max-width: 800px) {
  .nav { width: 68px; padding: 8px 4px; }
  .nav-item span.label, .nav-cta span.label, .nav-logo span.word { display: none; }
  .nav-item { justify-content: center; }
  .nav-cta { display: flex; align-items: center; justify-content: center; padding: 12px; }
  .nav-foot, .sim-banner { display: none; }
  .main { max-width: none; border-right: none; }
}
@media (max-width: 560px) {
  .shell { display: block; }
  .nav { display: none; }
  .main { max-width: none; border-right: none; padding-bottom: 56px; }
  .mobile-topbar {
    display: flex; align-items: center; justify-content: space-between;
    position: sticky; top: 0; z-index: 6; background: var(--bg);
    border-bottom: 1px solid var(--border); padding: 10px 14px; font-weight: 800; font-size: 17px;
  }
  .mobile-topbar .logo-text {
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; background-clip: text; color: transparent;
  }
  .sim-banner-top { display: block; margin: 0; border-radius: 0; border-left: none; border-right: none; }
  .mobile-tabbar {
    display: flex; position: fixed; left: 0; right: 0; bottom: 0; z-index: 6;
    background: color-mix(in srgb, var(--bg) 92%, transparent);
    backdrop-filter: blur(10px); border-top: 1px solid var(--border);
    padding: 4px max(4px, env(safe-area-inset-left)) max(4px, env(safe-area-inset-bottom));
  }
  .mobile-tabbar .nav-item {
    flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center;
    gap: 0; padding: 8px 2px; border-radius: 0; font-size: 20px;
  }
  .mobile-tabbar .nav-item span.label { display: none; }
  .mobile-tabbar .nav-item.active { color: var(--accent); }
}