:root{--bg:#f6f5f2;--panel:#fff;--ink:#1f2933;--muted:#5f6c76;--line:#d9e0e5;--brand:#246b61;--brand-dark:#174f48;--assistant:#edf7f4;--user:#23344d;--danger:#a23a35;--danger-bg:#fff0ee;--shadow:0 18px 50px #212b361f}*{box-sizing:border-box}html,body{min-height:100%}body{background:linear-gradient(180deg, #246b6114, #f6f5f200 260px), var(--bg);color:var(--ink);margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,textarea{font:inherit}.page-shell{min-height:100vh;padding:32px 16px}.chat-shell{background:var(--panel);width:min(920px,100%);min-height:calc(100vh - 64px);box-shadow:var(--shadow);border:1px solid #1f293314;border-radius:8px;grid-template-rows:auto 1fr auto;margin:0 auto;display:grid;overflow:hidden}.chat-header{border-bottom:1px solid var(--line);justify-content:space-between;align-items:flex-start;gap:16px;padding:20px 22px 16px;display:flex}.chat-title{margin:0;font-size:1.35rem;line-height:1.2}.chat-subtitle{max-width:680px;color:var(--muted);margin:8px 0 0;font-size:.95rem;line-height:1.45}.chat-subtitle.compact{font-size:.86rem;line-height:1.35}.account-line{color:var(--muted);margin:8px 0 0;font-size:.82rem;line-height:1.35}.chat-actions{flex:none;align-items:center;gap:8px;display:flex}.new-button,.send-button{cursor:pointer;border:0;border-radius:7px;transition:background .15s,transform .15s,opacity .15s}.new-button{color:var(--brand-dark);background:#eef2f1;flex:none;padding:10px 13px}.new-button.secondary{color:var(--muted);background:#f6f5f2}.auth-shell{background:var(--panel);width:min(1040px,100%);min-height:calc(100vh - 64px);box-shadow:var(--shadow);border:1px solid #1f293314;border-radius:8px;grid-template-columns:minmax(0,1fr) 390px;margin:0 auto;display:grid;overflow:hidden}.splash-panel{background:linear-gradient(135deg,#246b6124,#ffffff9e),#f7fbf9;flex-direction:column;justify-content:center;padding:clamp(28px,5vw,58px);display:flex}.splash-panel h1{letter-spacing:0;max-width:620px;margin:0;font-size:clamp(2rem,4vw,3.5rem);line-height:1.04}.splash-panel p{max-width:620px;color:var(--muted);margin:18px 0 0;font-size:1rem;line-height:1.6}.splash-panel .eyebrow{color:var(--brand-dark);letter-spacing:0;text-transform:uppercase;margin:0 0 16px;font-size:.78rem;font-weight:800}.splash-note{font-weight:700}.auth-panel{border-left:1px solid var(--line);flex-direction:column;justify-content:center;padding:24px;display:flex}.auth-tabs{background:#eef2f1;border-radius:8px;grid-template-columns:1fr 1fr;gap:6px;margin-bottom:18px;padding:4px;display:grid}.auth-tabs button{min-height:42px;color:var(--muted);cursor:pointer;background:0 0;border:0;border-radius:6px;font-weight:800}.auth-tabs button.active{color:var(--brand-dark);background:#fff;box-shadow:0 5px 18px #212b3614}.auth-form{gap:13px;display:grid}.auth-form label{color:var(--ink);gap:7px;font-size:.9rem;font-weight:700;display:grid}.auth-form input[type=email],.auth-form input[type=password]{border:1px solid var(--line);width:100%;min-height:46px;color:var(--ink);background:#fff;border-radius:7px;padding:10px 12px}.auth-form input:focus{border-color:var(--brand);outline:3px solid #246b6129}.disclaimer-check{border:1px solid var(--line);background:#fbfcfc;border-radius:7px;grid-template-columns:auto 1fr;align-items:start;gap:10px;max-height:210px;padding:12px;overflow-y:auto}.disclaimer-check input{width:18px;height:18px;margin-top:2px}.disclaimer-check span{color:var(--muted);font-size:.82rem;font-weight:500;line-height:1.45}.auth-submit{background:var(--brand);color:#fff;cursor:pointer;border:0;border-radius:7px;min-height:50px;font-weight:800}.auth-submit:disabled{cursor:not-allowed;opacity:.58}.new-button:hover,.send-button:hover{transform:translateY(-1px)}.messages{flex-direction:column;gap:14px;min-height:360px;padding:22px;display:flex;overflow-y:auto}.empty-state{max-width:560px;color:var(--muted);text-align:center;margin:auto;line-height:1.55}.message-row{display:flex}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.bubble{white-space:pre-wrap;overflow-wrap:anywhere;border-radius:8px;width:fit-content;max-width:min(72%,620px);padding:12px 14px;line-height:1.5}.message-row.user .bubble{background:var(--user);color:#fff}.message-row.assistant .bubble{background:var(--assistant);color:var(--ink)}.message-role{color:inherit;letter-spacing:0;opacity:.72;text-transform:uppercase;margin-bottom:5px;font-size:.72rem;font-weight:700;display:block}.composer-wrap{border-top:1px solid var(--line);background:#fffffff0;padding:16px 22px 20px}.error-banner{background:var(--danger-bg);color:var(--danger);border:1px solid #a23a3547;border-radius:7px;margin-bottom:12px;padding:11px 12px;line-height:1.4}.composer{grid-template-columns:1fr auto;align-items:end;gap:10px;display:grid}.composer textarea{resize:vertical;border:1px solid var(--line);width:100%;min-height:54px;max-height:160px;color:var(--ink);background:#fff;border-radius:7px;padding:13px 14px;line-height:1.45}.composer textarea:focus{border-color:var(--brand);outline:3px solid #246b6129}.send-button{background:var(--brand);color:#fff;min-width:96px;height:54px;padding:0 18px;font-weight:700}.send-button:disabled,.new-button:disabled,.auth-submit:disabled{cursor:not-allowed;opacity:.58;transform:none}.modal-backdrop{z-index:20;background:#1f29336b;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.rating-modal{width:min(560px,100%);max-height:min(720px,100vh - 36px);box-shadow:var(--shadow);background:#fff;border:1px solid #1f29331a;border-radius:8px;padding:22px;overflow-y:auto}.rating-modal h2{margin:0;font-size:1.25rem;line-height:1.25}.rating-modal p{color:var(--muted);margin:10px 0 0;line-height:1.5}.modal-actions{justify-content:flex-end;gap:10px;margin-top:18px;display:flex}.star-row{gap:6px;margin-top:14px;display:flex}.star-row button{border:1px solid var(--line);width:42px;height:42px;color:var(--muted);cursor:pointer;background:#fff;border-radius:7px;font-size:1.35rem;line-height:1}.star-row button.selected{background:var(--assistant);color:var(--brand-dark);border-color:#246b6152}.tag-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;margin-top:16px;display:grid}.tag-option{border:1px solid var(--line);min-height:42px;color:var(--ink);background:#fbfcfc;border-radius:7px;align-items:center;gap:8px;padding:9px 10px;font-size:.9rem;display:flex}.tag-option input{flex:none;width:16px;height:16px}.feedback-text{color:var(--ink);gap:7px;margin-top:16px;font-size:.9rem;font-weight:700;display:grid}.feedback-text textarea{resize:vertical;border:1px solid var(--line);min-height:92px;max-height:180px;color:var(--ink);border-radius:7px;padding:11px 12px;line-height:1.45}.feedback-text textarea:focus{border-color:var(--brand);outline:3px solid #246b6129}.typing{align-items:center;gap:4px;display:inline-flex}.typing span{background:var(--brand);border-radius:999px;width:6px;height:6px;animation:1.2s ease-in-out infinite typing}.typing span:nth-child(2){animation-delay:.16s}.typing span:nth-child(3){animation-delay:.32s}@keyframes typing{0%,80%,to{opacity:.35;transform:translateY(0)}40%{opacity:1;transform:translateY(-3px)}}@media (max-width:680px){.page-shell{padding:0}.chat-shell{border:0;border-radius:0;min-height:100vh}.chat-header{flex-direction:column;padding:18px 16px 14px}.chat-actions{grid-template-columns:1fr;width:100%;display:grid}.new-button{width:100%}.messages{padding:16px}.bubble{max-width:88%}.composer-wrap{padding:14px 16px 16px}.composer{grid-template-columns:1fr}.send-button{width:100%}.auth-shell{border:0;border-radius:0;grid-template-columns:1fr;min-height:100vh}.splash-panel{min-height:auto;padding:28px 18px 22px}.splash-panel h1{font-size:2rem}.auth-panel{border-left:0;border-top:1px solid var(--line);justify-content:start;padding:18px}.modal-actions,.tag-grid{grid-template-columns:1fr}.modal-actions{display:grid}.star-row button{width:38px;height:38px}}