:root{--lavender:#BBA3FF;--lime:#DDFB71;--cobalt:#476AFF;--pink:#E57ADE;--ink:#0E0E10;--ink-80:rgba(14,14,16,0.8);--ink-40:rgba(14,14,16,0.4);--ink-15:rgba(14,14,16,0.15);--bg:#FFFFFF;--shadow-pill:0 2px 0 0 rgba(14,14,16,0.9);--radius-chunky:24px;--radius-soft:12px;--radius-pill:9999px}*{margin:0;padding:0;box-sizing:border-box}body,html{height:100%}body{background:var(--bg);color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,sans-serif;height:100dvh;display:flex;flex-direction:column;overflow:hidden;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}.header{padding:18px 28px;display:flex;align-items:baseline;gap:14px;background:white;border-bottom:1px solid var(--ink-15);flex-shrink:0}.header-brand{font-family:Fraunces,Georgia,serif;font-size:20px;font-weight:600;color:var(--ink);line-height:1.1;letter-spacing:-.01em}.header-tool{font-size:11px;color:var(--ink-40);font-weight:500;letter-spacing:.12em;text-transform:uppercase}.messages{flex:1 1;overflow-y:auto;padding:32px 24px;display:flex;flex-direction:column;gap:18px;scroll-behavior:smooth;max-width:880px;width:100%;margin:0 auto}.messages::-webkit-scrollbar{width:10px}.messages::-webkit-scrollbar-track{background:transparent}.messages::-webkit-scrollbar-thumb{background:rgba(14,14,16,.18);border-radius:9999px}.messages::-webkit-scrollbar-thumb:hover{background:rgba(14,14,16,.32)}.message{display:flex;opacity:0;transform:translateY(8px);animation:fadeUp .35s ease forwards}@keyframes fadeUp{to{opacity:1;transform:translateY(0)}}.message.user{justify-content:flex-end}.message.assistant{justify-content:flex-start}.bubble{padding:14px 18px;border:1px solid var(--ink-80);border-radius:var(--radius-chunky);font-size:15px;line-height:1.65;font-weight:400;box-shadow:var(--shadow-pill);max-width:88%}@media (min-width:640px){.bubble{max-width:80%}}.message.assistant .bubble{background:var(--lavender);color:var(--ink);border-bottom-left-radius:8px;position:relative}.checkbox{display:inline-block;font-size:17px;line-height:1;margin-right:4px;vertical-align:-2px;color:var(--ink)}.copy-btn{position:absolute;top:-12px;right:-10px;background:white;border:1px solid var(--ink-80);border-radius:var(--radius-pill);padding:5px 13px;font-family:Inter,ui-sans-serif,system-ui,sans-serif;font-size:10px;font-weight:700;color:var(--ink);cursor:pointer;box-shadow:var(--shadow-pill);letter-spacing:.08em;text-transform:uppercase;transition:transform .1s ease,box-shadow .1s ease,background .15s ease}.copy-btn:hover{transform:translateY(-1px);box-shadow:0 3px 0 0 rgba(14,14,16,.9)}.copy-btn:active{transform:translateY(1px);box-shadow:0 1px 0 0 rgba(14,14,16,.9)}.copy-btn.copied,.message.user .bubble{background:var(--lime)}.message.user .bubble{color:var(--ink);border-bottom-right-radius:8px;white-space:pre-wrap}.message.assistant .bubble strong{font-weight:700;color:var(--ink)}.message.assistant .bubble a{color:var(--cobalt);text-decoration:underline;text-decoration-thickness:1.5px;text-underline-offset:3px;word-break:break-word;font-weight:500}.message.assistant .bubble a:hover{color:var(--ink)}.message.assistant .bubble hr{border:none;border-top:1.5px solid var(--ink-80);margin:14px 0;opacity:.5}.typing{display:flex;justify-content:flex-start;opacity:0;animation:fadeUp .3s ease .1s forwards}.typing-dots{background:var(--lavender);border:1px solid var(--ink-80);border-radius:var(--radius-chunky);border-bottom-left-radius:8px;padding:16px 22px;display:flex;gap:6px;align-items:center;box-shadow:var(--shadow-pill)}.typing-dots span{width:6px;height:6px;border-radius:50%;background:var(--ink);animation:typingBounce 1.2s ease-in-out infinite;opacity:.5}.typing-dots span:nth-child(2){animation-delay:.2s}.typing-dots span:nth-child(3){animation-delay:.4s}@keyframes typingBounce{0%,60%,to{transform:translateY(0);opacity:.4}30%{transform:translateY(-5px);opacity:1}}.input-area{padding:16px 24px 20px;background:white;border-top:1px solid var(--ink-15);flex-shrink:0}.input-inner{max-width:880px;margin:0 auto;display:flex;align-items:flex-end;gap:10px}textarea{flex:1 1;background:white;color:var(--ink);font-family:Inter,ui-sans-serif,system-ui,sans-serif;font-size:15px;font-weight:400;line-height:1.55;resize:none;max-height:160px;min-height:48px;border:1px solid var(--ink-80);border-radius:var(--radius-chunky);padding:13px 18px;outline:none;box-shadow:var(--shadow-pill);transition:box-shadow .15s ease,transform .05s ease}textarea::placeholder{color:var(--ink-40)}textarea:focus{box-shadow:var(--shadow-pill),0 0 0 3px rgba(71,106,255,.25)}.send-btn{background:var(--cobalt);color:white;font-family:Inter,ui-sans-serif,system-ui,sans-serif;font-size:14px;font-weight:600;border:1px solid var(--ink-80);border-radius:var(--radius-pill);padding:13px 22px;cursor:pointer;box-shadow:var(--shadow-pill);transition:transform .1s ease,box-shadow .1s ease,opacity .15s ease;flex-shrink:0;height:48px;display:flex;align-items:center;gap:8px}.send-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 3px 0 0 rgba(14,14,16,.9)}.send-btn:active:not(:disabled){transform:translateY(1px);box-shadow:0 1px 0 0 rgba(14,14,16,.9)}.send-btn:disabled{opacity:.4;cursor:not-allowed;box-shadow:none}.send-btn svg{width:14px;height:14px}.input-hint{text-align:center;font-size:11px;color:var(--ink-40);margin-top:10px;letter-spacing:.04em;font-weight:500}.error-bubble{background:#FFF0F0;border:1px solid var(--ink-80);padding:12px 18px;border-radius:var(--radius-chunky);font-size:14px;align-self:center;box-shadow:var(--shadow-pill);max-width:80%}.error-bubble,.gate{color:var(--ink);text-align:center}.gate{position:fixed;inset:0;z-index:2147483647;display:flex;align-items:center;justify-content:center;background:#FBF8F2;font-family:Inter,ui-sans-serif,system-ui,sans-serif;padding:24px}.gate-inner{max-width:440px}.gate-label{font-size:12px;letter-spacing:.2em;text-transform:uppercase;opacity:.5;font-weight:700}.gate-msg{margin-top:14px;font-size:16px;line-height:1.5}