:root{color-scheme:dark;--bg:#0b0f17;--panel:#111827;--panel-soft:#182131;--panel-lighter:#202b3c;--text:#f8fafc;--muted:#9ca3af;--line:#273244;--brand:#16c7a3;--brand-2:#f7b733;--danger:#ef4444;--shadow:0 24px 80px rgba(0,0,0,0.32)}*{box-sizing:border-box}body,html{min-height:100%;margin:0;background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,input,textarea{font:inherit}button{cursor:pointer}.app-shell{display:grid;grid-template-columns:320px 1fr;min-height:100vh;background:radial-gradient(circle at 16% 12%,rgba(22,199,163,.16),transparent 28%),radial-gradient(circle at 86% 10%,rgba(247,183,51,.12),transparent 24%),linear-gradient(135deg,#0b0f17,#101827 54%,#0a111d)}.sidebar{border-right:1px solid var(--line);background:rgba(8,12,20,.82);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:20px;display:flex;flex-direction:column;gap:18px;min-width:0}.brand-card{display:flex;align-items:center;gap:12px;padding:14px;border:1px solid rgba(255,255,255,.08);border-radius:18px;background:linear-gradient(135deg,rgba(22,199,163,.16),rgba(247,183,51,.12))}.logo-mark{width:42px;height:42px;border-radius:14px;display:grid;place-items:center;background:rgba(22,199,163,.16);border:1px solid rgba(22,199,163,.36);color:#5ff3d4;font-weight:900}.brand-title{font-size:18px;font-weight:800;line-height:1.1}.brand-subtitle{color:var(--muted);font-size:12px;margin-top:3px}.new-chat{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid rgba(22,199,163,.42);color:var(--text);background:rgba(22,199,163,.12);border-radius:14px;padding:12px 14px;font-weight:800}.conversation-list{display:grid;grid-gap:8px;gap:8px;overflow:auto;padding-right:4px}.conversation-button{width:100%;border:1px solid transparent;background:transparent;color:#dbe4f0;text-align:left;border-radius:12px;padding:11px 12px;min-height:46px;overflow:hidden;text-overflow:ellipsis}.conversation-button.active,.conversation-button:hover{background:rgba(255,255,255,.07);border-color:rgba(255,255,255,.08)}.sidebar-footer{margin-top:auto;display:grid;grid-gap:8px;gap:8px}.ghost-button{display:inline-flex;align-items:center;justify-content:center;gap:9px;border:1px solid var(--line);color:var(--text);background:rgba(255,255,255,.04);border-radius:12px;padding:10px 12px;font-weight:700}.main{min-width:0;display:grid;grid-template-rows:auto 1fr auto;max-height:100vh}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:0 28px;border-bottom:1px solid rgba(255,255,255,.06);background:rgba(11,15,23,.58);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.topbar-title{min-width:0;flex:1 1}.topbar-title strong{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.icon-button{width:42px;height:42px;display:inline-grid;place-items:center;border:1px solid var(--line);border-radius:13px;background:rgba(255,255,255,.05);color:var(--text)}.mobile-menu{display:none}.model-pill{display:inline-flex;gap:8px;align-items:center;justify-content:center;border-radius:999px;padding:9px 12px;color:#d1fae5;background:rgba(22,199,163,.12);border:1px solid rgba(22,199,163,.28);font-weight:800;white-space:nowrap}.chat-window{overflow:auto;padding:28px}.messages{width:min(980px,100%);margin:0 auto;display:grid;grid-gap:18px;gap:18px}.welcome{text-align:center;padding:8vh 16px 5vh}.welcome h1{margin:0;font-size:clamp(34px,6vw,68px);letter-spacing:0}.welcome p{color:var(--muted);font-size:18px;max-width:680px;margin:16px auto 0;line-height:1.6}.message{display:grid;grid-gap:8px;gap:8px}.message.user{justify-items:end}.bubble{max-width:min(760px,100%);border-radius:22px;padding:16px 18px;line-height:1.6;white-space:pre-wrap;box-shadow:0 10px 24px rgba(0,0,0,.16)}.user .bubble{background:linear-gradient(135deg,#16c7a3,#11997f);color:#05241e;font-weight:700}.assistant .bubble{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.08)}.source-row{display:flex;flex-wrap:wrap;gap:7px}.source-chip{font-size:12px;color:#9debd8;background:rgba(22,199,163,.12);border:1px solid rgba(22,199,163,.2);border-radius:999px;padding:5px 8px}.composer-wrap{padding:18px 28px 26px;background:linear-gradient(180deg,transparent,rgba(11,15,23,.96) 36%)}.composer{width:min(980px,100%);margin:0 auto;border:1px solid rgba(148,163,184,.24);border-radius:26px;background:rgba(17,24,39,.96);box-shadow:0 24px 70px rgba(0,0,0,.28);padding:12px;display:grid;grid-gap:10px;gap:10px}.composer textarea{width:100%;min-height:74px;max-height:220px;resize:none;border:0;outline:none;background:transparent;color:var(--text);padding:10px 12px;line-height:1.5;font-size:16px}.composer-actions{display:flex;justify-content:space-between;align-items:center;gap:10px}.file-label{display:inline-flex;align-items:center;gap:8px;color:#cbd5e1;border:1px solid rgba(148,163,184,.2);border-radius:999px;padding:10px 12px;background:rgba(255,255,255,.04)}.file-label input{display:none}.send-button{border:0;color:#06261f;background:linear-gradient(135deg,#5ff3d4,#f7b733);border-radius:999px;padding:0;font-weight:900;width:48px;height:48px;display:inline-grid;place-items:center;box-shadow:0 14px 26px rgba(22,199,163,.24)}.send-button:disabled{cursor:not-allowed;opacity:.45}.typing-bubble{display:inline-flex;align-items:center;gap:6px;width:-moz-fit-content;width:fit-content;border-radius:999px;padding:14px 16px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.08)}.typing-bubble span{width:8px;height:8px;border-radius:999px;background:#7dd3fc;animation:typing-dot 1s ease-in-out infinite}.typing-bubble span:nth-child(2){animation-delay:.15s}.typing-bubble span:nth-child(3){animation-delay:.3s}.guest-note{color:var(--muted);border:1px dashed var(--line);border-radius:16px;padding:14px;line-height:1.45}.image-chip{width:-moz-fit-content;width:fit-content;max-width:100%;display:inline-flex;align-items:center;gap:8px;border:1px solid rgba(22,199,163,.24);border-radius:999px;padding:8px 10px;color:#bff7ea;background:rgba(22,199,163,.1)}.image-chip span{max-width:min(480px,66vw);overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.image-chip button,.modal-close{border:0;color:inherit;background:transparent;display:inline-grid;place-items:center}.modal-backdrop{position:fixed;inset:0;z-index:60;display:grid;place-items:center;padding:18px;background:rgba(2,6,23,.68);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.auth-dialog{position:relative;width:min(460px,100%);border:1px solid var(--line);border-radius:26px;padding:22px;background:rgba(17,24,39,.98);box-shadow:var(--shadow);display:grid;grid-gap:12px;gap:12px}.auth-dialog h1{margin:8px 0 0}.auth-dialog input{border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);border-radius:14px;padding:13px 14px;outline:none}.modal-close{position:absolute;top:14px;right:14px;width:38px;height:38px;border-radius:12px;color:var(--text);background:rgba(255,255,255,.06)}.brand-card.compact{padding-right:52px}.auth-error{color:#fca5a5;margin:0}.mobile-scrim{display:none}@keyframes typing-dot{0%,80%,to{transform:translateY(0);opacity:.45}40%{transform:translateY(-4px);opacity:1}}.auth-panel{width:min(440px,92vw);margin:12vh auto;border:1px solid var(--line);border-radius:26px;padding:28px;background:rgba(17,24,39,.86);box-shadow:var(--shadow)}.auth-panel h1{margin:0 0 8px}.auth-panel p{margin:0 0 20px;color:var(--muted);line-height:1.5}.field-stack{display:grid;grid-gap:10px;gap:10px}.field-stack input{border:1px solid var(--line);background:rgba(255,255,255,.04);color:var(--text);border-radius:14px;padding:13px 14px;outline:none}.primary-button{border:0;border-radius:14px;background:#16c7a3;color:#06261f;font-weight:900;padding:13px 15px}.link-button{border:0;background:transparent;color:#6ee7d8;padding:6px 0;font-weight:800}.admin-grid{min-height:100vh;padding:32px}.admin-panel{max-width:1280px;margin:0 auto;display:grid;grid-gap:18px;gap:18px}.admin-card{border:1px solid var(--line);border-radius:22px;background:rgba(17,24,39,.82);box-shadow:var(--shadow);padding:22px}.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));grid-gap:12px;gap:12px}.metric{border:1px solid var(--line);border-radius:18px;padding:16px;background:rgba(255,255,255,.04)}.metric span{color:var(--muted);font-weight:800;text-transform:uppercase;font-size:12px}.metric strong{display:block;font-size:38px;margin-top:8px}@media (max-width:860px){.app-shell{grid-template-columns:1fr}.sidebar{position:fixed;inset:0 auto 0 0;z-index:50;width:min(86vw,330px);transform:translateX(-104%);transition:transform .18s ease;box-shadow:18px 0 60px rgba(0,0,0,.42)}.sidebar-visible .sidebar{transform:translateX(0)}.mobile-scrim{position:fixed;inset:0;z-index:45;display:block;border:0;background:rgba(2,6,23,.56)}.mobile-menu{display:inline-grid}.topbar{height:62px;padding:0 16px}.model-pill{max-width:46vw;overflow:hidden;text-overflow:ellipsis;font-size:13px}.welcome{padding:5vh 8px 3vh}.welcome h1{font-size:36px}.welcome p{font-size:16px}.chat-window,.composer-wrap{padding-left:14px;padding-right:14px}.chat-window{padding-top:18px;padding-bottom:12px}.composer-wrap{padding-bottom:calc(14px + env(safe-area-inset-bottom))}.bubble{max-width:92vw;border-radius:18px}.composer{border-radius:22px}.composer textarea{min-height:58px}.file-label span{display:none}.metric-grid{grid-template-columns:1fr 1fr}}@media (max-width:520px){.composer-actions{gap:8px}.send-button{width:46px;height:46px}.auth-dialog{border-radius:22px}.topbar-title strong{max-width:34vw}}