:root{--bg: #0f1115;--surface: #1a1d24;--border: #2a2f3a;--text: #f3f4f6;--muted: #9ca3af;--accent: #3b82f6;--accent-soft: rgba(59, 130, 246, .15);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;color:var(--text);background:var(--bg)}*{box-sizing:border-box}body{margin:0;min-height:100dvh}#root{min-height:100dvh}.app-shell{min-height:100dvh;padding-bottom:72px}.page{max-width:640px;margin:0 auto;padding:16px}.logo{font-size:1.5rem;font-weight:700;margin:24px 0 32px;display:flex;align-items:center;gap:8px}.search-input{width:100%;padding:14px 16px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text);font-size:1rem}.search-input:focus{outline:2px solid var(--accent);border-color:transparent}.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}.chip{padding:8px 14px;border-radius:999px;background:var(--accent-soft);color:var(--accent);border:none;font-size:.875rem;cursor:pointer}.section-title{color:var(--muted);font-size:.875rem;margin:24px 0 12px}.thread-list button,.history-card{width:100%;text-align:left;padding:14px;border-radius:12px;border:1px solid var(--border);background:var(--surface);color:var(--text);margin-bottom:8px;cursor:pointer}.thread-header{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:16px}.icon-btn{background:transparent;border:1px solid var(--border);color:var(--text);border-radius:8px;padding:8px 12px;cursor:pointer}.query-box{padding:12px;border-radius:12px;background:var(--surface);border:1px solid var(--border);margin-bottom:16px;color:var(--muted);font-size:.9rem}.answer{line-height:1.6;white-space:pre-wrap;margin:16px 0}.cursor-blink:after{content:"▌";animation:blink 1s step-end infinite;color:var(--accent)}@keyframes blink{50%{opacity:0}}.source-cards{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.source-card{flex:1 1 140px;max-width:100%;padding:10px 12px;border-radius:10px;border:1px solid var(--border);background:var(--surface);text-decoration:none;color:var(--text);font-size:.8rem}.source-card strong{display:block;color:var(--accent);margin-bottom:4px}.follow-up-list{list-style:none;padding:0;margin:0 0 16px}.follow-up-list li{padding:10px 0;border-bottom:1px solid var(--border);cursor:pointer;color:var(--accent)}.bottom-nav{position:fixed;bottom:0;left:0;right:0;display:flex;justify-content:space-around;background:var(--surface);border-top:1px solid var(--border);padding:10px 0 calc(10px + env(safe-area-inset-bottom));z-index:100}.bottom-nav a{color:var(--muted);text-decoration:none;font-size:.75rem;display:flex;flex-direction:column;align-items:center;gap:4px}.bottom-nav a.active{color:var(--accent)}.profile-card{border:1px solid var(--border);border-radius:12px;padding:16px;background:var(--surface);margin:16px 0}.pro-banner{border:1px solid var(--accent);border-radius:12px;padding:16px;background:var(--accent-soft);text-align:center;margin:16px 0}.pro-banner button{margin-top:12px;width:100%;padding:12px;border:none;border-radius:10px;background:var(--accent);color:#fff;font-weight:600;cursor:pointer}.danger-link{color:#f87171;background:none;border:none;padding:16px 0;cursor:pointer;width:100%;text-align:left}.loading-screen{display:flex;align-items:center;justify-content:center;min-height:100dvh;color:var(--muted)}