@import url("https://fonts.googleapis.com/css2?family=DM+Mono:wght@400;500&family=Manrope:wght@400;500;600;700;800&display=swap");
:root{--bg:#071224;--panel:#0c1b33d9;--panel-2:#ffffff0a;--line:#ffffff1f;--text:#eaf0ff;--muted:#9eafca;--accent:#69d6ff;--accent-2:#836dff;font-family:Manrope,system-ui,sans-serif;color:var(--text);background:var(--bg)}
*{box-sizing:border-box}
html,body{height:100%}
body{margin:0;display:flex;flex-direction:column;background:radial-gradient(circle at 12% 0,#174c9a 0,transparent 26rem),radial-gradient(circle at 92% 100%,#47237e 0,transparent 28rem),var(--bg)}
button{font:inherit}
[hidden]{display:none !important}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* Barra superior */
.topbar{display:flex;align-items:center;gap:14px;padding:14px 22px;border-bottom:1px solid var(--line);background:#071224cc;backdrop-filter:blur(12px)}
.brand{display:flex;align-items:center;gap:11px;color:#fff;text-decoration:none;margin-right:auto}
.brand-mark,.bot-avatar{display:grid;place-items:center;background:linear-gradient(135deg,var(--accent),var(--accent-2));box-shadow:0 8px 30px #5a88ff55}
.brand-mark{height:34px;width:34px;border-radius:11px;font-weight:800;font-size:19px}
.brand strong{display:block;font-size:14px;letter-spacing:.08em}
.brand small{display:block;color:#a8b8d7;font-size:10px;letter-spacing:.06em}
.session{display:flex;align-items:center;gap:10px}
.status{font:500 11px "DM Mono",monospace;color:#bfcbea}
.status:before{content:"";display:inline-block;height:7px;width:7px;border-radius:50%;margin-right:7px;background:#f4bc52}
.status.active:before{background:#4fd18b}

/* Botones */
.button{border:0;border-radius:10px;padding:10px 14px;color:#fff;font-weight:600;font-size:13px;cursor:pointer;transition:.15s}
.button:hover:not(:disabled){filter:brightness(1.1)}
.button:disabled{opacity:.45;cursor:not-allowed}
.ghost{background:#ffffff10;border:1px solid #ffffff28}
.primary{background:linear-gradient(120deg,#4e8fff,#805bf5);box-shadow:0 6px 18px #5e6eff44}
.wide{width:100%}
.icon-button{border:1px solid var(--line);background:#ffffff10;color:#fff;border-radius:9px;width:36px;height:36px;cursor:pointer}
.only-mobile{display:none}

/* Distribución */
.app{flex:1;display:grid;grid-template-columns:290px 1fr;min-height:0}
.history{border-right:1px solid var(--line);background:#081429b3;padding:18px 14px;display:flex;flex-direction:column;gap:10px;min-height:0}
.history h2{font:500 10px "DM Mono",monospace;letter-spacing:.14em;color:var(--accent);margin:12px 6px 0;text-transform:uppercase}
.history-list{list-style:none;margin:0;padding:0;overflow-y:auto;flex:1;display:flex;flex-direction:column;gap:4px}
.history-item{display:flex;align-items:stretch;border-radius:10px;border:1px solid transparent}
.history-item:hover,.history-item.selected{background:var(--panel-2);border-color:var(--line)}
.history-open{flex:1;min-width:0;text-align:left;background:none;border:0;color:var(--text);padding:9px 10px;cursor:pointer}
.history-open span{display:block;font-size:13px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.history-open time{display:block;font:400 10px "DM Mono",monospace;color:var(--muted);margin-top:3px}
.history-delete{background:none;border:0;color:var(--muted);cursor:pointer;padding:0 10px;opacity:0;font-size:15px}
.history-item:hover .history-delete,.history-delete:focus{opacity:1}
.history-delete:hover{color:#ff8a8a}
.muted,.side-note{color:var(--muted);font-size:12px;line-height:1.6;margin:4px 6px}
.side-note{font-size:11px}

/* Conversación */
.chat{display:flex;flex-direction:column;min-height:0}
.thread{flex:1;overflow-y:auto;padding:28px max(24px,calc((100% - 860px)/2)) 12px;display:flex;flex-direction:column;gap:18px}
.welcome{margin:auto;text-align:center;max-width:620px;padding:24px 0}
.welcome .bot-avatar{margin:0 auto 18px;height:52px;width:52px;border-radius:16px;font-size:24px}
.welcome h1{font-size:clamp(24px,3.4vw,34px);letter-spacing:-.03em;margin:0 0 10px}
.welcome p{color:#b6c4dd;line-height:1.7;font-size:14px;margin:0}
.examples{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:22px}
.chip{border:1px solid var(--line);background:var(--panel-2);color:#dce6fa;border-radius:999px;padding:8px 13px;font-size:12.5px;cursor:pointer}
.chip:hover{border-color:var(--accent);color:#fff}
.message{display:flex;gap:12px;align-items:flex-start}
.message.user{justify-content:flex-end}
.message .bot-avatar{flex:none;height:32px;width:32px;border-radius:10px;font-size:15px}
.bubble{max-width:100%;border-radius:14px;padding:13px 16px;line-height:1.65;font-size:14px;min-width:0}
.message.user .bubble{background:linear-gradient(120deg,#2b5bb8,#5a3fb0);max-width:78%;white-space:pre-wrap;word-wrap:break-word}
.message.assistant .bubble{background:var(--panel);border:1px solid var(--line);flex:1}
.bubble.error{border-color:#ff8a8a66;color:#ffc9c9}
.bubble p{margin:0 0 10px}.bubble p:last-child{margin-bottom:0}
.bubble h3,.bubble h4{margin:14px 0 6px;font-size:14.5px}
.bubble ul,.bubble ol{margin:0 0 10px;padding-left:22px}
.bubble li{margin:3px 0}
.bubble code{font:12.5px "DM Mono",monospace;background:#ffffff14;border-radius:5px;padding:1px 5px;word-break:break-word}
.bubble pre{background:#040b17;border:1px solid var(--line);border-radius:10px;padding:12px;overflow-x:auto;margin:0 0 10px}
.bubble pre code{background:none;padding:0}
.ref{font:500 10px "DM Mono",monospace;color:var(--accent);vertical-align:super;margin-left:1px}
.typing{display:inline-flex;gap:4px;padding:4px 0}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--muted);animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.2s}.typing i:nth-child(3){animation-delay:.4s}
@keyframes blink{0%,80%,100%{opacity:.25}40%{opacity:1}}
.sources{margin-top:12px;padding-top:10px;border-top:1px solid var(--line)}
.sources h4{font:500 10px "DM Mono",monospace;letter-spacing:.12em;color:var(--muted);margin:0 0 8px;text-transform:uppercase}
.sources ol{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:6px}
.source{font-size:12px;color:#c9d6ed;background:var(--panel-2);border:1px solid var(--line);border-radius:8px;padding:7px 10px}
.source small{display:block;color:var(--muted);font-size:11px}
.source a{color:var(--accent)}
.actions{margin-top:8px;display:flex;gap:6px}
.actions button{background:none;border:1px solid var(--line);color:var(--muted);border-radius:7px;padding:4px 9px;font-size:11px;cursor:pointer}
.actions button:hover{color:#fff}

/* Pantalla de acceso */
.gate{flex:1;display:grid;place-items:center;padding:24px 16px}
.gate-card{width:min(440px,100%);text-align:center;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:34px 30px;backdrop-filter:blur(18px)}
.gate-card .bot-avatar{margin:0 auto 18px;height:52px;width:52px;border-radius:16px;font-size:24px}
.gate-card h1{font-size:24px;letter-spacing:-.02em;margin:0 0 10px}
.gate-card p{color:#b6c4dd;line-height:1.65;font-size:14px;margin:0 0 14px}
.gate-message{color:#dce6fa!important;font-weight:600}
.gate-card .button{margin:6px 0 16px;padding:12px}

/* Caja de pregunta */
.composer{position:relative;padding:12px max(24px,calc((100% - 860px)/2)) 18px}
.composer textarea{width:100%;min-height:58px;max-height:220px;resize:none;background:#061226e6;border:1px solid #ffffff26;border-radius:14px;padding:16px 60px 16px 16px;color:#eff5ff;font:14px Manrope;outline:0;line-height:1.5}
.composer textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px #69caff1f}
.send{position:absolute;right:max(34px,calc((100% - 860px)/2 + 10px));top:22px;width:40px;height:40px;padding:0;border-radius:10px}
.hint{margin:6px 4px 0;color:#71829f;font:10.5px "DM Mono",monospace}

@media(max-width:820px){
  .only-mobile{display:inline-block}
  body{overflow-x:hidden}
  .topbar{position:relative;z-index:10;padding:10px 14px}
  .session .button{padding:8px 11px;font-size:12px;white-space:nowrap}
  .brand small{display:none}
  .app{grid-template-columns:1fr}
  .history{position:fixed;top:0;bottom:0;left:0;padding-top:72px;z-index:5;width:min(320px,86vw);visibility:hidden;transform:translateX(-100%);transition:transform .2s,visibility .2s;background:#081429fa;box-shadow:12px 0 40px #0008}
  .history.open{transform:none;visibility:visible}
  .history-delete{opacity:1}
  .session .status{display:none}
  .thread{padding:18px 14px 8px}
  .composer{padding:10px 14px 14px}
  .send{right:24px;top:20px}
  .message.user .bubble{max-width:90%}
}