:root{
  --bg:#080c14;--card:#111827;--card-border:rgba(255,255,255,0.07);--card-hover:#161f31;
  --accent:#4f8ef7;--accent2:#7b5cf5;--accent3:#00d4a8;
  --text:#f0f4ff;--text2:#8b9dc3;--text3:#4a5a7a;--radius:16px;--radius-sm:10px;
}
*{margin:0;padding:0;box-sizing:border-box}
html,*{scrollbar-width:thin;scrollbar-color:var(--accent) transparent}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:transparent}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--accent),var(--accent2));border-radius:99px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:var(--accent)}
body{background:var(--bg);color:var(--text);font-family:'DM Sans',sans-serif;line-height:1.6;min-height:100vh}
h1,h2,h3,.brand{font-family:'Syne',sans-serif}
a{color:inherit;text-decoration:none}
.wrap{max-width:760px;margin:0 auto;padding:28px 22px 90px}

.topbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:38px}
.brand{font-weight:800;font-size:21px;background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}
.back{font-size:14px;color:var(--text2);border:1px solid var(--card-border);padding:7px 14px;border-radius:99px;transition:.25s}
.back:hover{color:var(--text);border-color:var(--accent)}

h1{font-size:clamp(28px,5vw,40px);font-weight:800;letter-spacing:-.02em;margin-bottom:10px}
.sub{color:var(--text2);font-size:16px;margin-bottom:30px;max-width:600px}

label{display:block;font-size:13px;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text3);margin:18px 0 8px}
textarea,input{width:100%;background:var(--card);color:var(--text);border:1px solid var(--card-border);border-radius:var(--radius-sm);padding:14px 16px;font-family:'DM Sans',sans-serif;font-size:15px;transition:border-color .2s,box-shadow .2s;outline:none}
textarea{min-height:160px;resize:vertical;line-height:1.6}
textarea:focus,input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,142,247,.15)}
.row{display:flex;gap:14px;flex-wrap:wrap}
.row>div{flex:1;min-width:160px}

.select{position:relative;width:100%}
.select-btn{width:100%;display:flex;align-items:center;justify-content:space-between;gap:8px;background:var(--card);color:var(--text);border:1px solid var(--card-border);border-radius:var(--radius-sm);padding:14px 16px;font-family:'DM Sans',sans-serif;font-size:15px;cursor:pointer;transition:.2s;text-align:left}
.select-btn:hover{border-color:var(--accent)}
.select.open .select-btn{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,142,247,.15)}
.select-btn svg{width:16px;height:16px;flex:0 0 16px;fill:none;stroke:var(--text2);stroke-width:2;stroke-linecap:round;stroke-linejoin:round;transition:transform .25s}
.select.open .select-btn svg{transform:rotate(180deg)}
.select-list{position:absolute;top:calc(100% + 8px);left:0;right:0;z-index:30;background:rgba(17,24,39,.82);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid var(--card-border);border-radius:var(--radius-sm);padding:6px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:.2s;box-shadow:0 20px 45px -12px rgba(0,0,0,.65)}
.select.open .select-list{opacity:1;visibility:visible;transform:none}
.select-opt{padding:11px 13px;border-radius:8px;font-size:15px;color:var(--text2);cursor:pointer;transition:.15s}
.select-opt:hover{background:rgba(79,142,247,.14);color:var(--text)}
.select-opt.sel{background:rgba(79,142,247,.2);color:var(--text);font-weight:600}

.btn{margin-top:22px;width:100%;font-family:'Syne',sans-serif;font-weight:700;font-size:16px;color:#fff;background:linear-gradient(100deg,var(--accent),var(--accent2));border:none;border-radius:99px;padding:15px;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:10px;transition:transform .2s,box-shadow .2s;box-shadow:0 10px 30px -10px rgba(79,142,247,.6)}
.btn:hover{transform:translateY(-2px);box-shadow:0 16px 40px -10px rgba(123,92,245,.65)}
.btn:disabled{opacity:.7;cursor:not-allowed;transform:none}
.spin{width:16px;height:16px;border:2px solid rgba(255,255,255,.35);border-top-color:#fff;border-radius:50%;display:inline-block;animation:spin .7s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}

.err{color:#ff6b6b;font-size:14px;margin-top:14px;min-height:18px}

.result{margin-top:22px;background:var(--card);border:1px solid var(--card-border);border-radius:var(--radius);padding:22px;white-space:pre-wrap;line-height:1.7;font-size:15.5px;opacity:0;transform:translateY(12px);transition:.35s;display:none}
.result.show{opacity:1;transform:none;display:block}
.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.mini{font-size:13px;font-weight:600;color:var(--text2);background:rgba(255,255,255,.04);border:1px solid var(--card-border);border-radius:99px;padding:8px 16px;cursor:pointer;transition:.2s}
.mini:hover{color:var(--text);border-color:var(--accent)}

.chat{display:flex;flex-direction:column;gap:12px;margin-bottom:18px;min-height:220px}
.empty{color:var(--text3);text-align:center;padding:60px 0;font-size:15px}
.bubble{max-width:85%;padding:13px 17px;border-radius:16px;white-space:pre-wrap;line-height:1.6;font-size:15px;animation:rise .3s ease}
@keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.bubble.user{align-self:flex-end;background:linear-gradient(100deg,var(--accent),var(--accent2));color:#fff;border-bottom-right-radius:5px}
.bubble.ai{align-self:flex-start;background:var(--card);border:1px solid var(--card-border);color:var(--text);border-bottom-left-radius:5px}
.inputbar{display:flex;gap:10px;align-items:flex-end}
.inputbar textarea{min-height:0;height:52px;max-height:200px}
.send{flex:0 0 52px;height:52px;border:none;border-radius:50%;background:linear-gradient(100deg,var(--accent),var(--accent2));color:#fff;font-size:18px;cursor:pointer;transition:transform .2s;box-shadow:0 8px 22px -8px rgba(79,142,247,.6)}
.send:hover{transform:translateY(-2px)}
.send:disabled{opacity:.6;cursor:not-allowed}