:root{--color-bg:#faf8f5;--color-surface:#fff;--color-text:#2d2b28;--color-accent:#3a4d39;--color-accent-light:#eef1ec;--color-border:#e6e0d6;--color-user-bubble:#3a4d39;--color-user-bubble-text:#faf8f5;--color-ai-bubble:#fff;--color-muted:#7a7568;--font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box}body,html{height:100%}body{margin:0;background:var(--color-bg);color:var(--color-text);font-family:var(--font-sans);-webkit-font-smoothing:antialiased}.app-shell{display:flex;flex-direction:column;height:100vh;max-width:860px;margin:0 auto}.app-header{justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--color-border);flex-shrink:0}.app-header,.app-header__brand{display:flex;align-items:center}.app-header__brand{gap:10px}.app-header__icon{color:var(--color-accent);flex-shrink:0}.app-header__title{margin:0;font-size:1.15rem;font-weight:700;color:var(--color-text);line-height:1.1}.app-header__subtitle{margin:0;font-size:.8rem;color:var(--color-muted)}.app-header__links{display:flex;gap:8px}.app-header__link{border:1px solid var(--color-border);background:var(--color-surface);color:var(--color-accent);font-size:.85rem;font-weight:600;padding:7px 12px;border-radius:8px;text-decoration:none;cursor:pointer;transition:background .15s ease}.app-header__link:hover{background:var(--color-accent-light)}.app-main{flex:1 1;overflow-y:auto;padding:20px}.welcome{display:flex;flex-direction:column;align-items:center;text-align:center;padding:40px 12px 16px;gap:10px}.welcome__title{font-size:1.6rem;font-weight:700;margin:0}.welcome__description{max-width:520px;color:var(--color-muted);line-height:1.55;margin:0 0 8px}.quick-prompts{display:grid;grid-template-columns:repeat(2,1fr);grid-gap:12px;gap:12px;width:100%;max-width:640px;margin-top:12px}@media (max-width:560px){.quick-prompts{grid-template-columns:1fr}}.quick-prompt-chip{display:flex;flex-direction:column;align-items:flex-start;gap:4px;text-align:left;background:var(--color-surface);border:1px solid var(--color-border);border-radius:12px;padding:14px 16px;cursor:pointer;transition:border-color .15s ease,transform .1s ease;font-family:inherit}.quick-prompt-chip:hover{border-color:var(--color-accent);transform:translateY(-1px)}.quick-prompt-chip__icon{font-size:1.3rem}.quick-prompt-chip__title{font-weight:600;font-size:.95rem;color:var(--color-text)}.quick-prompt-chip__desc{font-size:.8rem;color:var(--color-muted);line-height:1.4}.chat-window{display:flex;flex-direction:column;gap:14px}.bubble-row{display:flex;width:100%}.bubble-row--user{justify-content:flex-end}.bubble-row--assistant{justify-content:flex-start}.bubble{max-width:78%;padding:12px 16px;border-radius:16px;line-height:1.5;white-space:pre-wrap;font-size:.95rem}.bubble--user{background:var(--color-user-bubble);color:var(--color-user-bubble-text);border-bottom-right-radius:4px}.bubble--assistant{background:var(--color-ai-bubble);border:1px solid var(--color-border);color:var(--color-text);border-bottom-left-radius:4px}.bubble__markdown{white-space:normal}.bubble__markdown>:first-child{margin-top:0}.bubble__markdown>:last-child{margin-bottom:0}.bubble__markdown p{margin:0 0 10px}.bubble__markdown h1,.bubble__markdown h2,.bubble__markdown h3{font-size:1rem;font-weight:700;margin:14px 0 6px}.bubble__markdown ol,.bubble__markdown ul{margin:0 0 10px;padding-left:1.3em}.bubble__markdown li{margin:3px 0}.bubble__markdown strong{font-weight:700}.bubble__markdown em{font-style:italic}.bubble__markdown hr{border:none;border-top:1px solid var(--color-border);margin:14px 0}.bubble__markdown code{background:var(--color-accent-light);padding:1px 5px;border-radius:4px;font-size:.85em}.bubble__markdown a{color:var(--color-accent)}.bubble--error{background:#fbeceb;border:1px solid #e3b8b4;color:#7a2e27}.typing-indicator{display:inline-flex;gap:4px;align-items:center;padding:4px 2px}.typing-indicator span{width:6px;height:6px;border-radius:50%;background:var(--color-muted);animation:typing-bounce 1.2s ease-in-out infinite}.typing-indicator span:nth-child(2){animation-delay:.15s}.typing-indicator span:nth-child(3){animation-delay:.3s}@keyframes typing-bounce{0%,60%,to{transform:translateY(0);opacity:.5}30%{transform:translateY(-4px);opacity:1}}.chat-input{flex-shrink:0;display:flex;align-items:flex-end;gap:10px;padding:14px 20px 20px;border-top:1px solid var(--color-border);background:var(--color-bg)}.chat-input__textarea{flex:1 1;resize:none;border:1px solid var(--color-border);border-radius:12px;padding:12px 14px;font-family:inherit;font-size:.95rem;color:var(--color-text);background:var(--color-surface);max-height:140px;line-height:1.4}.chat-input__textarea:focus{outline:none;border-color:var(--color-accent)}.chat-input__send{flex-shrink:0;width:44px;height:44px;border-radius:12px;border:none;background:var(--color-accent);color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:opacity .15s ease}.chat-input__send:disabled{opacity:.5;cursor:not-allowed}.modal-overlay{position:fixed;inset:0;background:rgba(45,43,40,.45);display:flex;align-items:center;justify-content:center;padding:20px;z-index:50}.modal-card{background:var(--color-surface);border-radius:14px;max-width:480px;width:100%;padding:24px;box-shadow:0 12px 40px rgba(0,0,0,.18)}.modal-card h2{margin-top:0}.modal-card__close{border:none;background:var(--color-accent);color:#fff;padding:9px 16px;border-radius:8px;cursor:pointer;font-weight:600;margin-top:16px}