:root{--bg:#f2f7fb;--card:#fff;--ink:#102133;--muted:#4e6174;--line:#cfd8e3;--primary:#0f8f74;--primary-2:#1870b9;--warn:#b07a00;--error:#b52323}*{box-sizing:border-box}body{color:var(--ink);background:radial-gradient(circle at top right,#c8ebe4 0%,transparent 44%),radial-gradient(circle at bottom left,#d0def5 0%,transparent 38%),var(--bg);margin:0;font-family:Avenir Next,IBM Plex Sans,Segoe UI,sans-serif}.auth-header{border-bottom:1px solid var(--line);background:var(--card);justify-content:flex-end;align-items:center;gap:12px;padding:16px 24px;display:flex}.brand-link{color:var(--ink);letter-spacing:.01em;margin-right:auto;font-weight:700;text-decoration:none}.header-link{color:var(--primary-2);font-weight:600;text-decoration:none}.header-link:hover{text-decoration:underline}.header-btn,.primary-btn,.secondary-btn{border:1px solid var(--line);cursor:pointer;border-radius:12px;padding:.62rem .9rem;font-size:.95rem;font-weight:700;transition:transform .14s,box-shadow .14s,filter .14s}.primary-btn{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-2));border:none;justify-content:center;align-items:center;text-decoration:none;display:inline-flex}.secondary-btn{color:var(--ink);background:#f8fbff}.primary-btn:hover,.secondary-btn:hover{transform:translateY(-1px)}.primary-btn:hover{box-shadow:0 8px 18px #1870b93d}.secondary-btn:hover{box-shadow:0 4px 14px #1021331f}.page{max-width:760px;margin:48px auto;padding:0 16px}.landing-page h1{letter-spacing:.01em;margin:0;font-size:2rem}.landing-page p{color:var(--muted);line-height:1.6}.landing-actions{gap:12px;margin-top:18px;display:flex}.landing-btn,.landing-link{min-width:150px}.muted-note{margin-top:18px;font-size:.92rem}.tool-page{align-items:start;min-height:calc(100vh - 90px);display:grid}.card{background:var(--card);border:1px solid var(--line);border-radius:20px;width:min(680px,100%);padding:1.5rem;position:relative;overflow:hidden;box-shadow:0 24px 36px #1121331f}.card-accent{pointer-events:none;background:radial-gradient(circle,#0f8f7438 0%,#0f8f7400 70%);width:12rem;height:12rem;position:absolute;top:-35%;right:-10%}.card h1{margin:0;font-size:1.7rem}.card p{color:var(--muted);margin-top:.4rem}.create-user-form{margin-top:1rem}.create-user-form label{margin-bottom:.4rem;font-weight:600;display:block}.tool-form-row{grid-template-columns:1fr auto;gap:.75rem;display:grid}.tool-form-row input{border:1px solid var(--line);background:#f8fbff;border-radius:12px;outline:none;padding:.75rem;font-size:1rem;transition:border-color .18s,box-shadow .18s}.tool-form-row input:focus{border-color:var(--primary-2);box-shadow:0 0 0 3px #1870b92e}.tool-submit-btn:disabled{opacity:.78;cursor:not-allowed;box-shadow:none;transform:none}.chat{border:1px solid var(--line);background:#f8fbff;border-radius:12px;min-height:72px;margin-top:1rem;padding:1rem}.message{margin:0;font-weight:600;line-height:1.45}.message.idle,.message.loading{color:var(--muted)}.message.loading:after{content:"";vertical-align:-.1rem;border:2px solid #10213333;border-top-color:#102133c7;border-radius:999px;width:.85rem;height:.85rem;margin-left:.55rem;animation:.7s linear infinite spin;display:inline-block}.message.created{color:var(--primary)}.message.duplicate{color:var(--warn)}.message.error{color:var(--error)}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:640px){.auth-header{flex-wrap:wrap;row-gap:8px}.tool-form-row,.landing-actions{grid-template-columns:1fr;display:grid}.landing-btn,.landing-link,.tool-submit-btn{width:100%}.card{border-radius:16px;padding:1.2rem}}