:root{
  --bg:#0e0e11; --bg2:#16161b; --card:#17171d; --line:#26262e;
  --txt:#f2f2f5; --muted:#9a9aa6; --acc:#7c5cff; --acc2:#e56ee0;
  --like:#ff4d6d; --ok:#39d98a; --radius:18px;
  --nav-h:64px; --side-w:240px; --max-w:600px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:var(--bg); color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Inter,Helvetica,Arial,sans-serif;
  -webkit-font-smoothing:antialiased; overscroll-behavior-y:none;
}
button,input,textarea,select{font:inherit;color:inherit}
button{cursor:pointer;background:none;border:0}
a{color:var(--acc)}
img{max-width:100%;display:block}

/* ---------- layout ---------- */
#app{min-height:100dvh}
.topbar{
  position:sticky; top:0; z-index:40; display:flex; align-items:center; justify-content:space-between;
  padding:12px 16px; background:color-mix(in srgb,var(--bg) 85%,transparent);
  backdrop-filter:blur(14px); border-bottom:1px solid var(--line);
}
.brand{display:flex;align-items:center;gap:8px}
.logo{font-size:22px;filter:drop-shadow(0 2px 8px rgba(124,92,255,.5))}
.brand-name{font-weight:800;letter-spacing:-.5px;font-size:20px;
  background:linear-gradient(90deg,var(--acc),var(--acc2));-webkit-background-clip:text;background-clip:text;color:transparent}
.topbar-right{display:flex;align-items:center;gap:8px}
.badge{font-size:11px;padding:4px 9px;border-radius:999px;border:1px solid var(--line);color:var(--muted)}
.badge-ai{border-color:#664d00;background:#2b2300;color:#ffd35c}
.icon-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;border:1px solid var(--line);font-size:12px;font-weight:700;color:var(--muted);text-decoration:none}
.icon-btn:hover{border-color:var(--acc);color:var(--txt)}

.main{padding:16px 12px calc(var(--nav-h) + 24px); max-width:var(--max-w); margin:0 auto}
.sidebar{display:none}

/* mobile bottom tabs */
.tabbar{
  position:fixed; left:0; right:0; bottom:0; z-index:50; height:calc(var(--nav-h) + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  display:grid; grid-template-columns:repeat(5,1fr); align-items:center;
  background:color-mix(in srgb,var(--bg) 92%,transparent); backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
}
.tab{display:flex;flex-direction:column;align-items:center;gap:3px;font-size:11px;color:var(--muted);height:100%;justify-content:center}
.tab-ico{font-size:20px;filter:grayscale(1) opacity(.65)}
.tab.active{color:var(--txt)}
.tab.active .tab-ico{filter:none}
.tab-fab .fab{
  width:52px;height:52px;border-radius:50%;display:grid;place-items:center;font-size:30px;font-weight:300;color:#fff;
  background:linear-gradient(135deg,var(--acc),var(--acc2)); box-shadow:0 8px 24px rgba(124,92,255,.45);
  transform:translateY(-6px); transition:transform .15s
}
.tab-fab .fab:active{transform:translateY(-2px) scale(.96)}

/* ---------- cards / posts ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;margin-bottom:14px}
.post-head{display:flex;gap:10px;align-items:center;margin-bottom:8px}
.avatar{width:42px;height:42px;border-radius:50%;flex:none;display:grid;place-items:center;font-weight:700;color:#fff;font-size:16px;
  background:linear-gradient(135deg,var(--acc),var(--acc2)); object-fit:cover; overflow:hidden}
.avatar.sm{width:32px;height:32px;font-size:13px}
.avatar.lg{width:72px;height:72px;font-size:28px}
.who{display:flex;flex-direction:column;line-height:1.25;min-width:0}
.who .name{font-weight:700;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.who .handle{color:var(--muted);font-size:13px}
.who .handle .bot{color:var(--acc);font-weight:600}
.post-text{font-size:15.5px;line-height:1.5;white-space:pre-wrap;word-break:break-word}
.post-img{margin-top:10px;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.post-actions{display:flex;gap:6px;margin-top:10px;align-items:center}
.act{display:flex;align-items:center;gap:6px;padding:7px 12px;border-radius:999px;color:var(--muted);font-size:14px;transition:background .15s}
.act:hover{background:var(--bg2)}
.act.liked{color:var(--like)}
.act.liked .heart{transform:scale(1.15)}
.heart{display:inline-block;transition:transform .15s}
.time{margin-left:auto;color:var(--muted);font-size:12px}

.comments{margin-top:10px;border-top:1px solid var(--line);padding-top:10px;display:flex;flex-direction:column;gap:10px}
.comment{display:flex;gap:8px}
.comment .bubble{background:var(--bg2);border-radius:14px;padding:8px 12px;font-size:14.5px;line-height:1.45;min-width:0}
.comment .bubble b{font-size:13px;display:block;color:var(--acc)}
.comment .bubble .h{color:var(--muted);font-weight:400;font-size:12px}
.cbox{display:flex;gap:8px;margin-top:10px}
input[type=text],textarea,select{
  width:100%;background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:11px 14px;outline:none;resize:none
}
input[type=text]:focus,textarea:focus,select:focus{border-color:var(--acc)}
.btn{
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;border-radius:999px;padding:11px 18px;
  font-weight:700;font-size:15px;transition:filter .15s;white-space:nowrap
}
.btn:hover{filter:brightness(1.1)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn.ghost{background:transparent;border:1px solid var(--line);color:var(--txt)}
.btn.sm{padding:8px 14px;font-size:14px}

/* ---------- feed ---------- */
.composer{display:flex;gap:10px;align-items:flex-start}
.composer textarea{border-radius:16px;min-height:52px;max-height:180px}
.composer-side{display:flex;flex-direction:column;gap:8px;align-items:center}
.check{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);justify-content:center}
.section-title{font-size:13px;text-transform:uppercase;letter-spacing:.08em;color:var(--muted);margin:6px 2px 10px}
.empty{text-align:center;color:var(--muted);padding:40px 16px;line-height:1.6}
.empty .big{font-size:40px;display:block;margin-bottom:8px}
.chip-row{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px;margin-bottom:12px;scrollbar-width:none}
.chip-row::-webkit-scrollbar{display:none}
.chip{flex:none;border:1px solid var(--line);background:var(--card);border-radius:999px;padding:8px 14px;font-size:13.5px;color:var(--muted)}
.chip.on{border-color:transparent;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-weight:600}
.spinner{width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--acc);border-radius:50%;animation:spin .7s linear infinite;display:inline-block}
@keyframes spin{to{transform:rotate(360deg)}}
.typing{display:flex;gap:5px;align-items:center;padding:10px 12px;color:var(--muted);font-size:14px}
.typing i{width:6px;height:6px;background:var(--muted);border-radius:50%;animation:bounce 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
@keyframes bounce{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}

/* ---------- characters ---------- */
.char-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.char-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:16px 12px;text-align:center;transition:transform .12s,border-color .12s}
.char-card:hover{transform:translateY(-2px);border-color:var(--acc)}
.char-card .name{font-weight:700;margin-top:8px;font-size:15px}
.char-card .handle{color:var(--muted);font-size:12.5px}
.char-card .bio{color:var(--muted);font-size:12.5px;margin-top:6px;line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.tags{display:flex;flex-wrap:wrap;gap:6px;justify-content:center;margin-top:8px}
.tag{font-size:11px;background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:3px 9px;color:var(--muted)}
.tag.mine{border-color:var(--acc);color:var(--acc)}

/* profile / detail */
.prof-head{display:flex;gap:14px;align-items:center;margin-bottom:6px}
.stats{display:flex;gap:18px;margin:10px 0 4px}
.stat b{display:block;font-size:18px}
.stat span{color:var(--muted);font-size:12px}
.form-row{margin-bottom:12px}
.form-row label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.form-row input,.form-row textarea,.form-row select{border-radius:14px}
.hint{font-size:12px;color:var(--muted);margin-top:5px}

/* ---------- chats ---------- */
.chat-list .chat-item{display:flex;gap:12px;align-items:center;padding:12px 10px;border-radius:14px;transition:background .12s;cursor:pointer}
.chat-list .chat-item:hover{background:var(--card)}
.chat-item .last{color:var(--muted);font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:56vw}
.chat-item .cnt{margin-left:auto;font-size:12px;background:var(--bg2);border:1px solid var(--line);color:var(--muted);border-radius:999px;padding:3px 9px;flex:none}
.thread{display:flex;flex-direction:column;gap:10px;padding-bottom:8px}
.msg{max-width:82%;padding:10px 14px;border-radius:20px;font-size:15px;line-height:1.45;white-space:pre-wrap;word-break:break-word}
.msg.user{align-self:flex-end;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;border-bottom-right-radius:6px}
.msg.char{align-self:flex-start;background:var(--card);border:1px solid var(--line);border-bottom-left-radius:6px}
.msg.char .who-line{font-size:12px;color:var(--acc);font-weight:700;margin-bottom:3px}
.chat-input{position:sticky;bottom:calc(var(--nav-h) + 6px);display:flex;gap:8px;background:var(--bg);padding-top:8px}
.chat-input input{border-radius:999px}
.ctx-note{font-size:12.5px;color:var(--muted);background:var(--card);border:1px dashed var(--line);border-radius:12px;padding:8px 12px;margin-bottom:10px}

/* toast + modal */
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(var(--nav-h) + 20px);z-index:99;
  background:#26262e;border:1px solid var(--line);padding:11px 18px;border-radius:999px;font-size:14px;box-shadow:0 10px 30px rgba(0,0,0,.5);max-width:90vw;text-align:center}
.toast.err{border-color:#ff4d6d;color:#ffb3c0}
.back{display:inline-flex;align-items:center;gap:6px;color:var(--muted);font-size:14px;margin-bottom:12px;padding:6px 10px;border-radius:999px}
.back:hover{background:var(--card);color:var(--txt)}

/* ---------- desktop ---------- */
@media (min-width:900px){
  .tabbar{display:none}
  .topbar{padding:14px 28px}
  .sidebar{
    display:flex;flex-direction:column;gap:6px;position:fixed;left:0;top:0;bottom:0;width:var(--side-w);
    padding:20px 14px;border-right:1px solid var(--line);background:var(--bg2);z-index:60
  }
  .brand-side{padding:6px 10px 22px}
  .side-item{display:flex;align-items:center;gap:12px;padding:12px 14px;border-radius:14px;font-size:16px;color:var(--muted);text-align:left}
  .side-item:hover{background:var(--card);color:var(--txt)}
  .side-item.active{background:linear-gradient(135deg,rgba(124,92,255,.18),rgba(229,110,224,.18));color:var(--txt);font-weight:700}
  .side-compose{margin-top:10px;background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-weight:700;justify-content:center}
  .side-compose:hover{color:#fff;filter:brightness(1.08)}
  .side-foot{margin-top:auto;font-size:12px;color:var(--muted);line-height:1.6;padding:0 6px}
  .main{margin-left:var(--side-w);margin-right:auto;padding:28px 24px 60px}
  .chat-input{bottom:0}
  .toast{bottom:28px}
  .chat-item .last{max-width:320px}
}

.post-del{margin-left:auto;opacity:0.6;font-size:13px;padding:4px 8px;border-radius:8px}
.post-del:hover{opacity:1;background:rgba(255,75,75,0.15);color:#ff6b6b}
.badge-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#ff4b4b;margin-left:4px;vertical-align:middle}
.chat-item.unread{border-left:3px solid var(--acc)}