@font-face{font-family:"Nunito";src:url("/fonts/Nunito.ttf") format("truetype");font-weight:200 1000;font-style:normal;font-display:swap}
*{box-sizing:border-box}
:root{--bg:#ffffff;--soft:#f6f6f6;--bubble:#efefef;--line:#e6e6e6;--line2:#d4d4d4;--text:#111111;--muted:#6b6b6b;--black:#111111;--err:#111111;
  --shadow:0 2px 6px rgba(0,0,0,.05),0 12px 32px rgba(0,0,0,.08);--shadow-sm:0 1px 3px rgba(0,0,0,.08)}
html,body{height:100%;margin:0}
body{font-family:"Nunito",ui-rounded,"SF Pro Rounded","Hiragino Maru Gothic ProN","Arial Rounded MT Bold",system-ui,-apple-system,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}
.hidden{display:none!important}
.brand-img{display:none}
.brand-img.loaded{display:block}

/* ---------- login ---------- */
.auth{min-height:100%;display:flex;align-items:center;justify-content:center;padding:24px;background:radial-gradient(900px 500px at 50% -10%,#f1f1f1 0,transparent 70%),var(--bg)}
.card{width:100%;max-width:390px;background:#fff;border:1px solid var(--line);border-radius:28px;padding:30px 28px 26px;box-shadow:var(--shadow);text-align:center}
.mascot{width:140px;height:140px;object-fit:contain;margin:0 auto 6px;animation:bob 3.2s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
.title{margin:4px 0 0;font-size:34px;font-weight:900;letter-spacing:-.02em}
.tag{color:var(--muted);margin:6px 0 22px;font-weight:600}
.tabs{display:flex;background:var(--soft);border:1px solid var(--line);border-radius:999px;padding:4px;margin-bottom:18px}
.tab{flex:1;border:0;background:transparent;color:var(--muted);padding:9px;border-radius:999px;font:inherit;font-size:14px;font-weight:800;cursor:pointer;transition:all .15s}
.tab.active{background:var(--black);color:#fff;box-shadow:var(--shadow-sm)}
form{text-align:left}
label{display:block;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:14px}
input{display:block;width:100%;margin-top:6px;padding:12px 16px;border-radius:16px;border:1.5px solid var(--line);background:var(--soft);color:var(--text);font:inherit;font-size:15px;outline:none;transition:border-color .15s,background .15s}
input::placeholder,textarea::placeholder{color:#a3a3a3}
input:focus{border-color:var(--black);background:#fff}
.primary{width:100%;border:0;border-radius:999px;padding:13px;font:inherit;font-size:16px;font-weight:800;color:#fff;background:var(--black);cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.18);transition:transform .1s,box-shadow .15s}
.primary:hover{box-shadow:0 6px 18px rgba(0,0,0,.24)}
.primary:active{transform:scale(.98)}
.primary:disabled{opacity:.5;cursor:default}
.error{color:var(--err);font-weight:700;font-size:13px;min-height:18px;margin:0 0 10px}
.fine{color:var(--muted);font-size:12px;margin:16px 0 0;line-height:1.5}

/* ---------- chat ---------- */
.chat{height:100%;display:flex;flex-direction:column;max-width:820px;margin:0 auto}
.topbar{display:flex;align-items:center;justify-content:space-between;padding:12px 18px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.92);backdrop-filter:blur(8px)}
.brand{display:flex;align-items:center;gap:10px}
.brand .name{font-weight:900;font-size:19px;letter-spacing:-.01em}
.avatar{position:relative;width:34px;height:34px;flex:none;border-radius:50%;background:var(--black);overflow:hidden;box-shadow:var(--shadow-sm);display:inline-flex;align-items:center;justify-content:center}
.avatar .fallback{color:#fff;font-weight:900;font-size:15px}
.avatar img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;background:#fff}
.avatar.small{width:30px;height:30px}
.avatar.small .fallback{font-size:13px}
.right{display:flex;gap:6px}
.ghost{background:#fff;border:1.5px solid var(--line);color:var(--text);border-radius:999px;padding:7px 14px;font:inherit;font-size:13px;font-weight:700;cursor:pointer;transition:all .15s}
.ghost:hover{border-color:var(--black)}
.messages{flex:1;overflow-y:auto;padding:22px 18px;display:flex;flex-direction:column;gap:12px}
.row{display:flex;gap:9px;align-items:flex-end;animation:pop .18s ease-out}
@keyframes pop{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
.row.user{justify-content:flex-end}
.bubble{max-width:76%;padding:11px 16px;border-radius:22px;line-height:1.5;font-size:15.5px;white-space:pre-wrap;word-wrap:break-word;overflow-wrap:anywhere}
.row.user .bubble{background:var(--black);color:#fff;border-bottom-right-radius:8px;box-shadow:0 3px 10px rgba(0,0,0,.14)}
.row.bot .bubble{background:var(--bubble);color:var(--text);border-bottom-left-radius:8px;box-shadow:var(--shadow-sm)}
.row.note{justify-content:center}
.row.note .bubble{background:#fff;border:1.5px dashed var(--line2);color:var(--muted);font-size:13.5px;font-weight:600;text-align:center;max-width:90%}
.bubble a{color:inherit;text-decoration:underline;text-underline-offset:2px}
.bubble code{background:rgba(0,0,0,.07);padding:1px 6px;border-radius:7px;font-size:13.5px}
.row.user .bubble code{background:rgba(255,255,255,.18)}
.bubble pre{background:#fff;border:1px solid var(--line2);padding:10px 12px;border-radius:12px;overflow-x:auto;white-space:pre;margin:6px 0}
.bubble pre code{background:none;padding:0}
.typing{display:inline-flex;gap:5px;padding:5px 2px}
.typing span{width:8px;height:8px;border-radius:50%;background:#8a8a8a;animation:blink 1.2s infinite}
.typing span:nth-child(2){animation-delay:.2s}.typing span:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.3;transform:translateY(0)}40%{opacity:1;transform:translateY(-4px)}}
.empty{margin:auto;text-align:center;color:var(--muted);font-weight:600}
.empty .mascot{width:120px;height:120px}
.empty h2{color:var(--text);margin:6px 0 4px;font-size:24px;font-weight:900}
.composer{display:flex;gap:10px;align-items:flex-end;margin:0 18px;padding:8px 8px 8px 18px;background:#fff;border:1.5px solid var(--line);border-radius:26px;box-shadow:var(--shadow);transition:border-color .15s}
.composer:focus-within{border-color:var(--black)}
textarea{flex:1;resize:none;border:0;background:transparent;color:var(--text);font:inherit;font-size:15.5px;line-height:1.45;max-height:180px;outline:none;padding:8px 0}
.send{border:0;width:40px;height:40px;border-radius:50%;background:var(--black);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;flex:none;transition:transform .1s}
.send:active{transform:scale(.92)}
.send:disabled{opacity:.35;cursor:default}
.hint{color:var(--muted);font-size:12px;font-weight:600;text-align:center;margin:8px 0 14px}
@media (max-width:600px){.bubble{max-width:86%}.hint{display:none}.composer{margin:0 10px 12px}.topbar{padding:10px 12px}.ghost{padding:6px 11px}.card{padding:24px 20px;border-radius:24px}}

/* ---------- tool chips ---------- */
.empty{max-width:620px;padding:0 4px}
.empty .welcome{margin:2px auto 16px;max-width:460px;line-height:1.5;color:#444}
.chips{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}
.chip{border:1.5px solid var(--line2);background:#fff;color:var(--text);border-radius:999px;padding:8px 14px;font:inherit;font-size:14px;font-weight:700;cursor:pointer;box-shadow:var(--shadow-sm);transition:background .12s,color .12s,border-color .12s,transform .08s}
.chip:hover{border-color:var(--black)}
.chip:active{transform:scale(.96)}
.chip.on{background:var(--black);color:#fff;border-color:var(--black)}
.chip.on::before{content:"✓ ";font-weight:900}
.chip-actions{display:flex;align-items:center;justify-content:center;gap:12px;margin-top:16px}
.chip-hint{font-size:13px;color:var(--muted);font-weight:600}
.chip-send{border:0;border-radius:999px;padding:10px 22px;font:inherit;font-size:15px;font-weight:800;color:#fff;background:var(--black);cursor:pointer;box-shadow:0 4px 14px rgba(0,0,0,.18);transition:opacity .15s,transform .08s}
.chip-send:active{transform:scale(.97)}
.chip-send:disabled{opacity:.3;cursor:default;box-shadow:none}
@media (max-width:600px){.chip{font-size:13px;padding:7px 12px}.messages{padding:16px 12px}}