/* Multi-IA — chat personal. Oscuro, limpio, móvil primero. Sin framework. */
*{box-sizing:border-box}
[hidden]{display:none !important}
:root{
  --bg:#0b0f1a; --bg2:#111827; --card:#161f31; --card2:#1b2740;
  --ink:#e8ecf4; --ink-dim:#9aa7bd; --line:#26334d;
  --accent:#7c5cff; --accent2:#9d86ff; --ok:#22c55e; --warn:#f59e0b; --bad:#ef4444;
  --radius:14px;
}
html,body{height:100%}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-size:16px; line-height:1.5;
  display:flex; flex-direction:column; min-height:100dvh;
}
button{font:inherit; color:inherit; background:none; border:0; cursor:pointer}
input,select,textarea{font:inherit; color:var(--ink)}
a{color:var(--accent2)}
.muted{color:var(--ink-dim)}
.small{font-size:13px}

/* Cabecera */
.topbar{
  display:flex; align-items:center; gap:10px;
  padding:10px 12px; background:var(--bg2);
  border-bottom:1px solid var(--line);
  position:sticky; top:0; z-index:30;
}
.brand{display:flex; flex-direction:column; line-height:1.15; flex:1; min-width:0}
.brand strong{font-size:18px; letter-spacing:.2px}
.brand span{font-size:12px; color:var(--ink-dim)}
.icon-btn{
  width:40px; height:40px; border-radius:12px; font-size:19px;
  display:flex; align-items:center; justify-content:center;
  background:var(--card); border:1px solid var(--line);
}
.icon-btn:active{transform:scale(.96)}

/* Cajón de chats */
.backdrop{
  position:fixed; inset:0; background:rgba(0,0,0,.55); z-index:40;
}
.drawer{
  position:fixed; top:0; left:0; bottom:0; width:min(320px,86vw);
  background:var(--bg2); border-right:1px solid var(--line); z-index:41;
  display:flex; flex-direction:column; padding:14px;
}
.drawer-head{display:flex; align-items:center; justify-content:space-between; margin-bottom:10px}
.chat-list{flex:1; overflow-y:auto; display:flex; flex-direction:column; gap:8px}
.chat-item{
  display:flex; align-items:center; gap:8px; text-align:left;
  background:var(--card); border:1px solid var(--line);
  border-radius:12px; padding:10px 12px; width:100%;
}
.chat-item.active{border-color:var(--accent); background:var(--card2)}
.chat-item .t{flex:1; min-width:0; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; font-size:14px}
.chat-item .d{color:var(--ink-dim); font-size:15px; padding:2px 6px; border-radius:8px}
.chat-item .d:hover{color:var(--bad); background:rgba(239,68,68,.15)}
.drawer-note{font-size:12px; color:var(--ink-dim); margin:10px 0 0}
.chat-empty{color:var(--ink-dim); font-size:14px; padding:8px 2px}

/* Botones */
.btn{
  background:var(--card); border:1px solid var(--line); border-radius:12px;
  padding:10px 16px; font-weight:700;
}
.btn.small{padding:7px 12px; font-size:14px}
.btn.primary{background:var(--accent); border-color:var(--accent); color:#fff}
.btn.danger{color:#fca5a5; border-color:rgba(239,68,68,.5)}
.btn:active{transform:scale(.98)}

/* Selector de modelo */
#chatWrap{flex:1; display:flex; flex-direction:column; max-width:760px; width:100%; margin:0 auto; min-height:0}
.model-bar{
  display:flex; gap:8px; overflow-x:auto; padding:12px 12px 4px;
  scrollbar-width:none;
}
.model-bar::-webkit-scrollbar{display:none}
.model-chip{
  flex:0 0 auto; border:1px solid var(--line); background:var(--card);
  border-radius:999px; padding:8px 13px; font-size:14px; font-weight:700;
  display:flex; align-items:center; gap:7px;
}
.model-chip .tag{font-size:11px; font-weight:800; padding:2px 7px; border-radius:99px}
.model-chip .tag.free{background:rgba(34,197,94,.18); color:#4ade80}
.model-chip .tag.paid{background:rgba(245,158,11,.18); color:#fbbf24}
.model-chip.active{background:var(--accent); border-color:var(--accent); color:#fff}
.model-chip.active .tag.free{background:rgba(255,255,255,.22); color:#fff}
.model-chip.active .tag.paid{background:rgba(255,255,255,.22); color:#fff}

/* Mensajes */
.messages{
  flex:1; overflow-y:auto; padding:14px 12px; min-height:220px;
  display:flex; flex-direction:column; gap:12px;
}
.msg{max-width:88%; padding:11px 13px; border-radius:var(--radius); white-space:pre-wrap; word-break:break-word; font-size:15px}
.msg.user{align-self:flex-end; background:var(--accent); color:#fff; border-bottom-right-radius:5px}
.msg.assistant{align-self:flex-start; background:var(--card); border:1px solid var(--line); border-bottom-left-radius:5px}
.msg.error{align-self:flex-start; background:rgba(239,68,68,.12); border:1px solid rgba(239,68,68,.45); color:#fecaca}
.msg.info{align-self:center; background:var(--card); border:1px dashed var(--line); color:var(--ink-dim); font-size:13.5px; text-align:center; max-width:96%}
.msg .meta{display:block; font-size:11.5px; color:var(--ink-dim); margin-top:6px; opacity:.85}
.msg.user .meta{color:rgba(255,255,255,.75)}
.msg video{width:100%; border-radius:10px; margin-top:8px; background:#000; max-height:60vh}
.msg .dl{display:inline-block; margin-top:8px; font-size:13.5px; font-weight:700}
.msg .spin{display:inline-block; width:14px; height:14px; border:2px solid var(--ink-dim); border-top-color:var(--accent2); border-radius:50%; animation:rot 1s linear infinite; vertical-align:-2px; margin-right:6px}
@keyframes rot{to{transform:rotate(360deg)}}
.empty{margin:auto; text-align:center; color:var(--ink-dim); max-width:420px; padding:20px}
.empty h2{color:var(--ink); font-size:19px; margin:0 0 6px}
.empty p{margin:6px 0; font-size:14.5px}

/* Opciones de video */
.video-opts{padding:0 12px 8px; display:flex; flex-direction:column; gap:8px}
.field{display:flex; flex-direction:column; gap:5px; font-size:13.5px; color:var(--ink-dim)}
.field input,.field select{
  background:var(--card); border:1px solid var(--line); border-radius:11px;
  padding:10px 12px; width:100%; outline:none;
}
.field input:focus,.field select:focus{border-color:var(--accent)}

/* Compositor */
.composer{
  display:flex; gap:8px; padding:10px 12px calc(10px + env(safe-area-inset-bottom,0px));
  background:var(--bg2); border-top:1px solid var(--line);
  position:sticky; bottom:0;
}
.composer textarea{
  flex:1; resize:none; background:var(--card); border:1px solid var(--line);
  border-radius:12px; padding:11px 13px; outline:none; max-height:160px; line-height:1.45;
}
.composer textarea:focus{border-color:var(--accent)}
#btnSend{
  width:48px; flex:0 0 48px; border-radius:12px; background:var(--accent);
  color:#fff; font-size:19px; display:flex; align-items:center; justify-content:center;
}
#btnSend:disabled{opacity:.45}
.hint{
  margin:0; padding:8px 14px calc(10px + env(safe-area-inset-bottom,0px));
  font-size:12.5px; color:var(--ink-dim); text-align:center; background:var(--bg2);
}
.hint b{color:var(--ink)}
.hint .ok{color:#4ade80; font-weight:700}
.hint .no{color:#fbbf24; font-weight:700}

/* Modal de configuración */
.modal{
  position:fixed; inset:0; z-index:50; background:rgba(0,0,0,.6);
  display:flex; align-items:flex-start; justify-content:center; padding:18px 12px;
  overflow-y:auto;
}
.modal-card{
  background:var(--bg2); border:1px solid var(--line); border-radius:18px;
  width:100%; max-width:560px; padding:18px; margin:auto 0;
}
.modal-head{display:flex; align-items:center; justify-content:space-between; gap:10px}
.modal-head strong{font-size:17px}
.key-field{border:1px solid var(--line); border-radius:14px; padding:12px; margin:12px 0; background:var(--card)}
.key-field .kf-top{display:flex; align-items:center; gap:8px; flex-wrap:wrap}
.key-field .kf-top strong{font-size:15px}
.key-field .kf-top .tag{font-size:11px; font-weight:800; padding:2px 7px; border-radius:99px}
.key-field .tag.free{background:rgba(34,197,94,.18); color:#4ade80}
.key-field .tag.paid{background:rgba(245,158,11,.18); color:#fbbf24}
.key-field .kf-top a{margin-left:auto; font-size:13px; font-weight:700}
.key-field .kf-row{display:flex; gap:8px; margin-top:9px}
.key-field input{
  flex:1; min-width:0; background:var(--bg); border:1px solid var(--line);
  border-radius:10px; padding:10px 12px; outline:none;
}
.key-field input:focus{border-color:var(--accent)}
.key-field .eye{width:44px; flex:0 0 44px; border:1px solid var(--line); border-radius:10px; font-size:16px}
.key-field .kf-status{font-size:12.5px; margin:7px 0 0}
.key-field .kf-status.ok{color:#4ade80}
.key-field .kf-status.no{color:#fbbf24}
.modal-actions{display:flex; gap:10px; margin-top:14px; flex-wrap:wrap}

.toast{
  position:fixed; left:50%; bottom:90px; transform:translateX(-50%);
  background:var(--card2); border:1px solid var(--line); color:var(--ink);
  padding:10px 16px; border-radius:999px; font-size:14px; font-weight:700; z-index:60;
  box-shadow:0 8px 24px rgba(0,0,0,.4); max-width:92vw; text-align:center;
}

@media (min-width:760px){
  .msg{max-width:78%}
  .drawer{position:fixed}
}
@media (prefers-reduced-motion: reduce){
  .msg .spin{animation:none}
}