*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow:hidden}
:root{
  --bg:#f5f3ef;--bg-sb:#eceae5;--bg-hov:#e3dfd8;--bg-act:#d9d4cc;--bg-w:#ffffff;
  --br:rgba(0,0,0,.09);--br-m:rgba(0,0,0,.13);--br-s:rgba(0,0,0,.20);
  --tx:#111111;--tx2:#4a4a4a;--txm:#9a9a9a;
  --accent:#5b6af0;--accent-h:#4755e0;--accent-s:rgba(91,106,240,.12);--accent-b:rgba(91,106,240,.2);
  --danger:#d63031;--success:#00b894;--warn:#e17055;
  --r:10px;--rl:16px;--rxl:22px;--sb:264px;
  --font:'Plus Jakarta Sans','Tajawal',-apple-system,BlinkMacSystemFont,sans-serif;
  --mono:'JetBrains Mono','Courier New',monospace;
  --shadow-sm:0 1px 4px rgba(0,0,0,.06),0 2px 10px rgba(0,0,0,.04);
  --shadow-md:0 4px 16px rgba(0,0,0,.09),0 1px 4px rgba(0,0,0,.05);
  --shadow-lg:0 12px 40px rgba(0,0,0,.14),0 2px 8px rgba(0,0,0,.06);
}
html[dir=rtl]{--font:'Tajawal','Plus Jakarta Sans',-apple-system,sans-serif}
html.dark{
  --bg:#16181c;--bg-sb:#1c1e24;--bg-hov:#252830;--bg-act:#2d303a;--bg-w:#1e2028;
  --br:rgba(255,255,255,.08);--br-m:rgba(255,255,255,.12);--br-s:rgba(255,255,255,.2);
  --tx:#f0f0f0;--tx2:#a0a0b0;--txm:#60607a;
  --accent:#7c8df5;--accent-h:#6575f3;--accent-s:rgba(124,141,245,.15);--accent-b:rgba(124,141,245,.25);
  --shadow-sm:0 1px 4px rgba(0,0,0,.3),0 2px 10px rgba(0,0,0,.2);
  --shadow-md:0 4px 16px rgba(0,0,0,.4),0 1px 4px rgba(0,0,0,.25);
  --shadow-lg:0 12px 40px rgba(0,0,0,.5),0 2px 8px rgba(0,0,0,.3);
}
body{font-family:var(--font);background:var(--bg);color:var(--tx);font-size:14px;display:flex;height:100dvh;transition:background .2s,color .2s}
::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:rgba(0,0,0,.14);border-radius:10px}
html.dark ::-webkit-scrollbar-thumb{background:rgba(255,255,255,.12)}

/* ═══ SIDEBAR ═══ */
.sb{width:var(--sb);background:var(--bg-sb);border-left:1px solid var(--br);display:flex;flex-direction:column;flex-shrink:0;transition:width .25s cubic-bezier(.4,0,.2,1),opacity .25s;overflow:hidden}
.sb.hidden{width:0;opacity:0;pointer-events:none}
.sb-head{padding:14px 12px 10px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--tx)}
.logo-mark{width:28px;height:28px;background:linear-gradient(135deg,var(--accent),var(--accent-h));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:11px;font-weight:700;flex-shrink:0;box-shadow:0 2px 8px var(--accent-b)}
.logo-name{font-size:14px;font-weight:700;letter-spacing:-.2px}
.new-btn{display:flex;align-items:center;gap:7px;margin:0 10px 10px;padding:9px 13px;background:var(--accent-s);border:1px solid var(--accent-b);border-radius:var(--r);font-family:var(--font);font-size:13px;color:var(--accent);cursor:pointer;transition:all .18s;width:calc(100% - 20px);font-weight:500}
.new-btn:hover{background:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 3px 12px var(--accent-b)}
.new-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:2.2;flex-shrink:0}
.sb-lbl{font-size:10px;font-weight:700;color:var(--txm);letter-spacing:.7px;text-transform:uppercase;padding:6px 14px 5px}
.chat-list{flex:1;overflow-y:auto;padding:0 6px 10px}
.chat-item{display:flex;align-items:center;gap:7px;padding:8px 9px;border-radius:var(--r);cursor:pointer;font-size:12.5px;color:var(--tx2);transition:all .15s;white-space:nowrap;overflow:hidden;border:1px solid transparent;position:relative}
.chat-item:hover{background:var(--bg-hov);color:var(--tx)}
.chat-item.active{background:var(--bg-act);color:var(--tx);border-color:var(--br-m)}
.chat-item svg.ci-ico{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:1.7;flex-shrink:0;opacity:.45}
.ci-txt{overflow:hidden;text-overflow:ellipsis;flex:1;font-size:12px}
.ci-del{display:none;position:absolute;left:7px;background:none;border:none;color:var(--txm);cursor:pointer;padding:3px 5px;border-radius:5px;font-size:13px;line-height:1;transition:all .13s}
.chat-item:hover .ci-del{display:block}
.ci-del:hover{color:var(--danger);background:rgba(214,48,49,.1)}
.sb-foot{padding:10px 10px 16px;border-top:1px solid var(--br);display:flex;flex-direction:column;gap:1px}
.sb-btn{display:flex;align-items:center;gap:8px;padding:8px 9px;border-radius:var(--r);cursor:pointer;font-size:12.5px;color:var(--tx2);background:none;border:none;font-family:var(--font);width:100%;transition:all .15s}
.sb-btn:hover{background:var(--bg-hov);color:var(--tx)}
.sb-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8;flex-shrink:0}

/* ═══ MAIN ═══ */
.main{flex:1;display:flex;flex-direction:column;overflow:hidden;min-width:0}
.topbar{height:54px;padding:0 16px;display:flex;align-items:center;justify-content:space-between;flex-shrink:0;border-bottom:1px solid var(--br);background:var(--bg);backdrop-filter:blur(10px)}
.tb-group{display:flex;align-items:center;gap:3px}
.ib{width:34px;height:34px;border-radius:var(--r);background:none;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--tx2);transition:all .15s;flex-shrink:0}
.ib:hover{background:var(--bg-hov);color:var(--tx)}
.ib svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:1.8}
.model-btn{display:flex;align-items:center;gap:6px;padding:6px 13px;border-radius:20px;background:var(--bg-hov);border:1px solid var(--br-m);font-family:var(--font);font-size:12.5px;color:var(--tx2);cursor:pointer;transition:all .18s;max-width:240px}
.model-btn:hover{background:var(--bg-act);border-color:var(--br-s);color:var(--tx)}
.model-dot{width:7px;height:7px;border-radius:50%;background:var(--accent);flex-shrink:0;box-shadow:0 0 0 2px var(--accent-s)}
.mb-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-weight:500}
.model-btn svg{width:11px;height:11px;stroke:currentColor;fill:none;stroke-width:2.2;flex-shrink:0;opacity:.5}
.lang-toggle{display:flex;align-items:center;background:var(--bg-hov);border:1px solid var(--br);border-radius:20px;padding:3px;gap:1px}
.lang-opt{padding:3px 11px;border-radius:16px;font-size:11.5px;font-weight:500;cursor:pointer;transition:all .15s;color:var(--txm);background:none;border:none;font-family:var(--font)}
.lang-opt.active{background:var(--bg-w);color:var(--tx);box-shadow:0 1px 4px rgba(0,0,0,.12)}

/* dark toggle */
.dark-btn{width:34px;height:34px;border-radius:var(--r);background:none;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--tx2);transition:all .15s;flex-shrink:0}
.dark-btn:hover{background:var(--bg-hov);color:var(--tx)}
.dark-btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:1.8}

/* ═══ MESSAGES ═══ */
.messages{flex:1;overflow-y:auto;padding:0 0 24px;scroll-behavior:smooth;display:flex;flex-direction:column}
.welcome{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:40px 20px;gap:28px;text-align:center}
.welcome-icon{width:56px;height:56px;background:linear-gradient(135deg,var(--accent),var(--accent-h));border-radius:16px;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 24px var(--accent-b);margin-bottom:4px}
.welcome-icon svg{width:28px;height:28px;stroke:#fff;fill:none;stroke-width:1.7}
.welcome-title{font-size:26px;font-weight:600;line-height:1.3;letter-spacing:-.4px}
.welcome-title span{color:var(--txm);font-weight:400}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;max-width:640px;width:100%}
.card{background:var(--bg-w);border:1px solid var(--br);border-radius:var(--rl);padding:16px;text-align:right;cursor:pointer;transition:all .2s cubic-bezier(.4,0,.2,1);display:flex;flex-direction:column;gap:6px;box-shadow:var(--shadow-sm)}
.card:hover{border-color:var(--accent-b);transform:translateY(-2px);box-shadow:var(--shadow-md),0 0 0 1px var(--accent-b)}
.card-emoji{font-size:20px;margin-bottom:2px}
.card-title{font-size:12.5px;font-weight:600;color:var(--tx)}
.card-sub{font-size:11.5px;color:var(--txm);line-height:1.5}
.msg-wrap{max-width:720px;margin:0 auto;width:100%;padding:6px 20px;animation:fadeUp .22s cubic-bezier(.4,0,.2,1)}
@keyframes fadeUp{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.msg-row{display:flex;gap:10px;align-items:flex-start}
.msg-row.user{justify-content:flex-end}
.av{width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:10px;font-weight:700;flex-shrink:0;margin-top:2px}
.av.ai{background:linear-gradient(135deg,var(--accent),var(--accent-h));color:#fff;box-shadow:0 2px 8px var(--accent-b)}
.av.user{background:var(--bg-act);border:1px solid var(--br-m);color:var(--tx2)}
.msg-body{max-width:88%;display:flex;flex-direction:column;gap:3px}
.msg-row.user .msg-body{align-items:flex-end}
.msg-name{font-size:11px;font-weight:600;color:var(--accent);margin-bottom:3px;opacity:.8}
.bubble-u{background:linear-gradient(135deg,var(--accent),var(--accent-h));color:#fff;border-radius:var(--rxl) var(--rxl) var(--r) var(--rxl);padding:11px 16px;font-size:14px;line-height:1.65;white-space:pre-wrap;word-break:break-word;box-shadow:0 3px 14px var(--accent-b)}
.bubble-ai{font-size:14px;line-height:1.85;word-break:break-word}
.bubble-ai p{margin-bottom:10px}.bubble-ai p:last-child{margin-bottom:0}
.bubble-ai h3{font-size:15px;font-weight:600;margin:16px 0 7px;color:var(--tx)}
.bubble-ai strong{font-weight:600}
.bubble-ai em{font-style:italic;color:var(--tx2)}
.bubble-ai ul,.bubble-ai ol{padding-right:18px;margin:8px 0}
.bubble-ai li{margin-bottom:5px;line-height:1.7}
.bubble-ai a{color:var(--accent);text-underline-offset:2px}
.bubble-ai code{font-family:var(--mono);background:var(--accent-s);border:1px solid var(--accent-b);padding:2px 6px;border-radius:5px;font-size:12.5px;color:var(--accent)}
.bubble-ai pre{background:#13151a;border-radius:12px;margin:14px 0;overflow:hidden;box-shadow:var(--shadow-md);border:1px solid rgba(255,255,255,.06)}
.pre-bar{display:flex;align-items:center;justify-content:space-between;padding:8px 14px;background:rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.06)}
.pre-lang{font-size:10.5px;color:#7c8af5;font-family:var(--mono);font-weight:600;letter-spacing:.3px}
.copy-pre{background:none;border:none;color:#8b949e;font-size:11px;cursor:pointer;font-family:var(--font);display:flex;align-items:center;gap:4px;padding:3px 8px;border-radius:5px;transition:all .13s}
.copy-pre:hover{background:rgba(255,255,255,.08);color:#cdd9e5}
.copy-pre svg{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2}
.bubble-ai pre code{display:block;padding:14px 16px;font-size:12.5px;line-height:1.7;background:none;border:none;color:#e2e8f5;overflow-x:auto;white-space:pre}
.msg-time{font-size:10.5px;color:var(--txm);margin-top:3px}
.act-row{display:flex;gap:2px;margin-top:4px;opacity:0;transition:opacity .15s}
.msg-wrap:hover .act-row{opacity:1}
.act-btn{display:flex;align-items:center;gap:3px;background:none;border:none;padding:4px 9px;border-radius:var(--r);font-size:11.5px;color:var(--txm);cursor:pointer;font-family:var(--font);transition:all .15s}
.act-btn:hover{background:var(--bg-hov);color:var(--tx)}
.act-btn svg{width:12px;height:12px;stroke:currentColor;fill:none;stroke-width:2}
.typing-bub{display:flex;align-items:center;gap:5px;padding:4px 0}
.dot{width:7px;height:7px;background:var(--accent);border-radius:50%;animation:bnc 1.3s ease-in-out infinite;opacity:.7}
.dot:nth-child(2){animation-delay:.18s}.dot:nth-child(3){animation-delay:.36s}
@keyframes bnc{0%,60%,100%{transform:translateY(0);opacity:.7}30%{transform:translateY(-8px);opacity:1}}

/* ═══ FILE ATTACHMENTS IN MESSAGES ═══ */
.attach-preview-msg{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:8px}
.file-chip-msg{display:flex;align-items:center;gap:6px;background:var(--bg-hov);border:1px solid var(--br-m);border-radius:8px;padding:6px 10px;font-size:12px;color:var(--tx2);max-width:200px}
.file-chip-msg .fc-ico{font-size:16px;flex-shrink:0}
.file-chip-msg .fc-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.img-preview-msg{max-width:280px;max-height:200px;border-radius:10px;border:1px solid var(--br-m);object-fit:cover;cursor:pointer;transition:opacity .15s}
.img-preview-msg:hover{opacity:.88}

/* ═══ INPUT AREA ═══ */
.input-area{padding:10px 20px 20px;flex-shrink:0}
.input-inner{max-width:720px;margin:0 auto}

/* file preview bar */
.file-preview-bar{display:none;flex-wrap:wrap;gap:6px;padding:8px 14px;background:var(--bg-w);border:1px solid var(--br-m);border-radius:var(--rl) var(--rl) 0 0;border-bottom:none}
.file-preview-bar.has-files{display:flex}
.file-chip{display:flex;align-items:center;gap:5px;background:var(--bg-hov);border:1px solid var(--br);border-radius:20px;padding:4px 10px;font-size:11.5px;color:var(--tx2);max-width:160px}
.file-chip .fc-ico{font-size:14px;flex-shrink:0}
.file-chip .fc-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap;flex:1}
.file-chip .fc-rm{background:none;border:none;color:var(--txm);cursor:pointer;font-size:15px;line-height:1;padding:0 0 0 2px;display:flex;align-items:center}
.file-chip .fc-rm:hover{color:var(--danger)}
.img-thumb{width:46px;height:46px;object-fit:cover;border-radius:8px;border:1px solid var(--br-m);flex-shrink:0}

.input-box{background:var(--bg-w);border:1px solid var(--br-m);border-radius:var(--rxl);box-shadow:var(--shadow-sm);display:flex;flex-direction:column;overflow:hidden;transition:box-shadow .2s,border-color .2s}
.input-box.with-files{border-radius:0 0 var(--rxl) var(--rxl)}
.input-box:focus-within{border-color:var(--accent-b);box-shadow:var(--shadow-md),0 0 0 3px var(--accent-s)}
.input-top{display:flex;align-items:flex-end;gap:10px;padding:13px 14px 10px}
#userInput{flex:1;background:none;border:none;outline:none;font-family:var(--font);font-size:14px;color:var(--tx);resize:none;max-height:190px;min-height:22px;line-height:1.65;direction:auto}
#userInput::placeholder{color:var(--txm)}
.send-btn{width:36px;height:36px;border-radius:50%;background:linear-gradient(135deg,var(--accent),var(--accent-h));border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .18s;flex-shrink:0;box-shadow:0 2px 10px var(--accent-b)}
.send-btn:hover{transform:scale(1.08);box-shadow:0 4px 18px var(--accent-b)}
.send-btn:disabled{background:var(--bg-hov);border:1px solid var(--br);cursor:not-allowed;transform:none;box-shadow:none}
.send-btn svg{width:15px;height:15px;stroke:#fff;fill:none;stroke-width:2.2}
.send-btn:disabled svg{stroke:var(--txm)}
.input-bot{display:flex;align-items:center;justify-content:space-between;padding:5px 10px 10px;border-top:1px solid var(--br)}
.input-tools{display:flex;gap:1px}
.tool-btn{display:flex;align-items:center;gap:4px;padding:5px 9px;border-radius:var(--r);background:none;border:none;cursor:pointer;font-family:var(--font);font-size:11.5px;color:var(--tx2);transition:all .15s}
.tool-btn:hover{background:var(--bg-hov);color:var(--tx)}
.tool-btn svg{width:13px;height:13px;stroke:currentColor;fill:none;stroke-width:1.8}
.tool-btn.has-attach{color:var(--accent);background:var(--accent-s)}
.input-hint{font-size:10.5px;color:var(--txm)}
.input-foot{text-align:center;margin-top:9px;font-size:10.5px;color:var(--txm);line-height:1.5}
#fileInput{display:none}

/* drop zone */
.drop-zone{position:fixed;inset:0;background:rgba(91,106,240,.08);backdrop-filter:blur(4px);z-index:300;display:none;align-items:center;justify-content:center;flex-direction:column;gap:14px;border:3px dashed var(--accent-b);pointer-events:none}
.drop-zone.active{display:flex}
.drop-zone-icon{font-size:52px}
.drop-zone-txt{font-size:16px;font-weight:600;color:var(--accent)}

/* ═══ MODALS ═══ */
.ov{position:fixed;inset:0;background:rgba(0,0,0,.35);z-index:200;display:flex;align-items:center;justify-content:center;opacity:0;pointer-events:none;transition:opacity .2s;backdrop-filter:blur(4px)}
.ov.open{opacity:1;pointer-events:auto}
.modal{background:var(--bg);border:1px solid var(--br-m);border-radius:20px;box-shadow:var(--shadow-lg);transform:translateY(16px) scale(.96);transition:transform .22s cubic-bezier(.4,0,.2,1);overflow:hidden}
.ov.open .modal{transform:none}
.modal-head{padding:18px 20px 13px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--br);flex-shrink:0}
.modal-title{font-size:15px;font-weight:700;letter-spacing:-.1px}
.mx{width:30px;height:30px;border-radius:var(--r);background:none;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--txm);transition:all .15s}
.mx:hover{background:var(--bg-hov);color:var(--tx)}
.mx svg{width:15px;height:15px;stroke:currentColor;fill:none;stroke-width:2}

/* model picker */
.mpk{width:540px;max-width:94vw;max-height:82vh;display:flex;flex-direction:column}
.msearch-wrap{padding:11px 14px;border-bottom:1px solid var(--br);flex-shrink:0;display:flex;gap:8px}
.msearch{flex:1;background:var(--bg-hov);border:1px solid var(--br-m);border-radius:var(--r);color:var(--tx);padding:8px 12px;font-size:13px;font-family:var(--font);outline:none;transition:border-color .15s,box-shadow .15s}
.msearch:focus{border-color:var(--accent-b);box-shadow:0 0 0 3px var(--accent-s)}
.msearch::placeholder{color:var(--txm)}
.fetch-btn{display:flex;align-items:center;gap:5px;padding:8px 14px;background:linear-gradient(135deg,var(--accent),var(--accent-h));border:none;border-radius:var(--r);color:#fff;font-size:12px;font-family:var(--font);cursor:pointer;white-space:nowrap;transition:all .15s;flex-shrink:0;font-weight:500;box-shadow:0 2px 8px var(--accent-b)}
.fetch-btn:hover{transform:translateY(-1px);box-shadow:0 4px 14px var(--accent-b)}
.fetch-btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.fetch-btn svg{width:13px;height:13px;stroke:#fff;fill:none;stroke-width:2}
.fetch-btn.loading svg{animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.model-list{overflow-y:auto;flex:1;padding:6px 10px 12px}
.mg-lbl{font-size:10px;font-weight:700;color:var(--txm);text-transform:uppercase;letter-spacing:.7px;padding:12px 8px 5px}
.mo{display:flex;align-items:center;justify-content:space-between;padding:9px 11px;border-radius:var(--r);cursor:pointer;font-size:13px;color:var(--tx);transition:all .15s;border:1px solid transparent}
.mo:hover{background:var(--bg-hov)}
.mo.sel{background:var(--accent-s);border-color:var(--accent-b)}
.mo-name{font-weight:500;font-size:13px}
.mo-id{font-size:11px;color:var(--txm);font-family:var(--mono);margin-top:1px}
.mo-chk{width:16px;height:16px;flex-shrink:0;stroke:var(--accent);fill:none;stroke-width:2.5;opacity:0}
.mo.sel .mo-chk{opacity:1}
.fetch-status{padding:8px 16px;font-size:12px;border-bottom:1px solid var(--br);flex-shrink:0}
.fetch-status.ok{color:var(--success)}
.fetch-status.err{color:var(--danger)}

/* settings modal */
.smodal{width:480px;max-width:94vw;max-height:88vh;overflow-y:auto;display:flex;flex-direction:column}
.modal-body{padding:18px 20px;display:flex;flex-direction:column;gap:17px;flex:1}
.fg{display:flex;flex-direction:column;gap:6px}
.fl{font-size:11.5px;font-weight:700;color:var(--tx2);letter-spacing:.2px}
.fd{font-size:11px;color:var(--txm);line-height:1.55}
.field{width:100%;background:var(--bg-hov);border:1px solid var(--br-m);border-radius:var(--r);color:var(--tx);padding:9px 11px;font-size:13.5px;font-family:var(--font);outline:none;transition:border-color .15s,box-shadow .15s;appearance:none}
.field:focus{border-color:var(--accent-b);box-shadow:0 0 0 3px var(--accent-s)}
.field::placeholder{color:var(--txm)}
.api-wrap{position:relative}
.api-wrap .field{padding-left:38px}
.eye-btn{position:absolute;left:10px;top:50%;transform:translateY(-50%);background:none;border:none;cursor:pointer;color:var(--txm);display:flex;padding:2px;transition:color .13s}
.eye-btn:hover{color:var(--tx)}
.eye-btn svg{width:14px;height:14px;stroke:currentColor;fill:none;stroke-width:1.8}
.rr{display:flex;align-items:center;gap:10px}
.rr input[type=range]{flex:1;-webkit-appearance:none;height:4px;background:var(--bg-act);border-radius:4px;outline:none;border:none;padding:0}
.rr input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;background:var(--accent);border-radius:50%;cursor:pointer;box-shadow:0 0 0 3px var(--accent-s)}
.rv{font-size:12.5px;font-weight:700;min-width:28px;text-align:center;color:var(--accent)}
textarea.field{resize:vertical;min-height:80px;max-height:140px;line-height:1.65}
.modal-foot{padding:13px 20px 18px;display:flex;justify-content:flex-end;gap:8px;border-top:1px solid var(--br)}
.btn-c{padding:8px 18px;border-radius:var(--r);background:none;border:1px solid var(--br-m);font-family:var(--font);font-size:13px;color:var(--tx2);cursor:pointer;transition:all .15s}
.btn-c:hover{background:var(--bg-hov)}
.btn-s{padding:8px 20px;border-radius:var(--r);background:linear-gradient(135deg,var(--accent),var(--accent-h));border:none;font-family:var(--font);font-size:13px;color:#fff;cursor:pointer;transition:all .18s;font-weight:600;box-shadow:0 2px 10px var(--accent-b)}
.btn-s:hover{transform:translateY(-1px);box-shadow:0 4px 16px var(--accent-b)}

/* image lightbox */
.lightbox{position:fixed;inset:0;background:rgba(0,0,0,.9);z-index:400;display:none;align-items:center;justify-content:center;cursor:zoom-out;backdrop-filter:blur(8px)}
.lightbox.open{display:flex}
.lightbox img{max-width:90vw;max-height:90vh;border-radius:10px;object-fit:contain;box-shadow:var(--shadow-lg)}

/* toast */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--tx);color:var(--bg);border-radius:var(--r);padding:10px 20px;font-size:12.5px;z-index:999;pointer-events:none;opacity:0;transition:all .24s cubic-bezier(.4,0,.2,1);white-space:nowrap;max-width:90vw;text-align:center;box-shadow:var(--shadow-md)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* mobile */
.mob-ov{display:none;position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:90;backdrop-filter:blur(2px)}
.mob-ov.show{display:block}
@media(max-width:768px){
  .sb{position:fixed;top:0;right:0;height:100%;z-index:100;transform:translateX(100%);transition:transform .25s cubic-bezier(.4,0,.2,1);opacity:1;pointer-events:auto}
  .sb.hidden{width:var(--sb);opacity:1;transform:translateX(100%)}
  .sb.mob-open{transform:translateX(0)}
  .cards{grid-template-columns:1fr 1fr}
  .input-area{padding:8px 12px 16px}
  .msg-wrap{padding:4px 12px}
  .lang-toggle{display:none}
}
@media(max-width:480px){.cards{grid-template-columns:1fr}.welcome-title{font-size:22px}}
html[dir=ltr] .card{text-align:left}
html[dir=ltr] .bubble-u{border-radius:var(--rxl) var(--rxl) var(--rxl) var(--r)}
html[dir=ltr] .msg-row.user .msg-body{align-items:flex-start}

/* ═══ AUTH SCREEN ═══ */
.auth-screen{position:fixed;inset:0;z-index:1000;background:radial-gradient(circle at 50% -10%,var(--accent-s),var(--bg) 55%);display:flex;align-items:center;justify-content:center;padding:24px}
.auth-card{width:384px;max-width:100%;background:var(--bg-w);border:1px solid var(--br-m);border-radius:22px;box-shadow:var(--shadow-lg);padding:34px 30px 26px;display:flex;flex-direction:column;gap:15px;animation:fadeUp .3s cubic-bezier(.4,0,.2,1)}
.auth-logo{width:54px;height:54px;border-radius:15px;background:linear-gradient(135deg,var(--accent),var(--accent-h));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:18px;letter-spacing:.5px;margin:0 auto 2px;box-shadow:0 6px 22px var(--accent-b)}
.auth-head{text-align:center}
.auth-title{font-size:21px;font-weight:700;letter-spacing:-.3px}
.auth-sub{font-size:12.5px;color:var(--txm);margin-top:5px}
.auth-form{display:flex;flex-direction:column;gap:11px;margin-top:2px}
.auth-btn{width:100%;padding:11px;font-size:14px;margin-top:3px}
.auth-switch{text-align:center;font-size:12.5px;color:var(--txm)}
.auth-switch a{color:var(--accent);cursor:pointer;font-weight:600;text-decoration:none}
.auth-switch a:hover{text-decoration:underline}
.auth-err{background:rgba(214,48,49,.1);border:1px solid rgba(214,48,49,.25);color:var(--danger);font-size:12px;padding:9px 12px;border-radius:9px;text-align:center;display:none}
.auth-err.show{display:block}
.auth-lang{display:flex;justify-content:center;gap:6px;margin-top:2px}
.auth-lang .lang-opt{border:1px solid var(--br);border-radius:14px}
.auth-lang .lang-opt:hover{background:var(--bg-hov);color:var(--tx)}
.auth-note{font-size:10.5px;color:var(--txm);text-align:center;line-height:1.5;margin-top:2px}

/* account page */
.acc-user{font-size:14px;font-weight:600;color:var(--tx);background:var(--bg-hov);border:1px solid var(--br);border-radius:var(--r);padding:9px 12px}
.acc-divider{height:1px;background:var(--br);margin:4px 0 1px}