:root{
  --bg:#fff; --fg:#111; --muted:#6b6b6b;
  --card-bg:rgba(0,0,0,.04); --card-bd:rgba(0,0,0,.1);
}
.theme-dark:root, .theme-dark{
  --bg:#000; --fg:#fff; --muted:#bdbdbd;
  --card-bg:rgba(255,255,255,.06); --card-bd:rgba(255,255,255,.15);
}
*{box-sizing:border-box}
html,body{height:100%;margin:0;padding:0}
body{
  background:var(--bg); color:var(--fg);
  font-family:"Funnel Display",sans-serif;
  font-weight:500; letter-spacing:.15px;
}

/* Header */
.site-header{
  height:100px;display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;
}
.brand img{height:46px;display:block}
.logo-light{display:none}
.theme-dark .logo-dark{display:none}
.theme-dark .logo-light{display:block}

/* SWITCH: luna izquierda / sol derecha */
.theme-switch{
  width:66px;height:30px;border-radius:999px;
  background:var(--fg);border:1px solid var(--fg);
  display:flex;align-items:center;padding:2px;cursor:pointer;position:relative;
  transition:background .3s ease,border .3s ease;
}
.knob{
  width:26px;height:26px;border-radius:50%;background:var(--bg);
  transform:translateX(36px);transition:transform .25s ease,background .3s ease;
}
.theme-dark .knob{transform:translateX(2px)}
.ts-icon{
  position:absolute;top:50%;transform:translateY(-50%);
  width:18px;height:18px;display:inline-flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity .25s ease;
}
.ts-icon svg{width:18px;height:18px}
.ts-icon.left{left:8px;color:#111;}   /* luna negra */
.ts-icon.right{right:8px;color:#fff;} /* sol blanco */
.theme-light .ts-icon.left{opacity:1}
.theme-light .ts-icon.right{opacity:0}
.theme-dark  .ts-icon.left{opacity:0}
.theme-dark  .ts-icon.right{opacity:1}

/* Fondo cards */
.bg-cards{position:fixed;inset:0;z-index:-1;pointer-events:none;overflow:hidden}
.bg-card{
  position:absolute;min-width:220px;max-width:340px;
  background:var(--card-bg);border:1px solid var(--card-bd);
  color:var(--fg);padding:12px 14px;border-radius:16px;
  opacity:0;backdrop-filter:blur(6px);
  animation:floaty 14s ease-in-out infinite
}
.bg-card .q{font-weight:600;font-size:14px}
.bg-card .a{font-size:13px;font-weight:400;margin-top:6px}
@keyframes floaty{
  0%{transform:translateY(20px);opacity:0}
  20%{opacity:.9}
  50%{transform:translateY(-10px);opacity:1}
  100%{transform:translateY(20px);opacity:0}
}

/* Main */
.main{
  min-height:calc(100dvh - 168px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  padding:24px;text-align:center
}
.hero{font-weight:500;font-size:clamp(28px,3.1vw,40px)}
.hero strong{font-weight:600}
.home-section.hide{opacity:0;pointer-events:none;transform:translateY(8px);transition:.25s}

/* Input */
.ask{position:relative;width:min(760px,85vw);height:72px;
  border:1px solid var(--fg);border-radius:24px;
  display:flex;align-items:center;padding:0 22px}
.ask input{
  position:absolute;inset:0;width:100%;height:100%;
  border:0;outline:none;background:transparent;color:var(--fg);
  font-size:clamp(20px,2.1vw,28px);font-weight:400;
  padding:0 60px 0 22px;z-index:2
}
.ask-ghost{
  position:absolute;left:22px;right:60px;
  color:var(--fg);opacity:.8;font-size:clamp(20px,2.1vw,28px);
  font-weight:400;pointer-events:none;z-index:1;transition:opacity .2s ease;
}
.caret{animation:blink 1.8s steps(2,end) infinite}
@keyframes blink{0%,75%{opacity:1}76%,100%{opacity:0}}

.ask-send{
  position:absolute;right:12px;top:50%;transform:translateY(-50%);
  width:40px;height:40px;border:1px solid var(--fg);border-radius:12px;
  background:transparent;color:var(--fg);
  display:grid;place-items:center;cursor:pointer;z-index:3;
}
.ask-send:hover{opacity:.7}

/* Loader pequeño */
.loader-overlay{
  position:fixed;inset:0;display:none;place-items:center;
  background:var(--bg);z-index:10;
}
.loader-overlay.show{display:grid}
.loaderM{width:90px;animation:spin 1.2s linear infinite}
.theme-dark .loaderM{filter:invert(1)}
@keyframes spin{to{transform:rotate(360deg)}}

/* Respuesta */
.answer-wrap{display:none;text-align:center}
.answer-wrap.show{display:block}
.answer{
  font-size:clamp(88px,10vw,140px);font-weight:800;
  opacity:0;transform:translateY(8px);
  animation:fadeIn .45s ease forwards
}
@keyframes fadeIn{to{opacity:1;transform:none}}
.ask-secondary{margin-top:24px;opacity:0;transition:.35s}
.ask-secondary.show{opacity:1}

/* Footer */
.site-footer{
  height:68px;display:flex;align-items:center;justify-content:space-between;
  padding:0 24px;font-weight:400
}
.muted{color:var(--muted)}

/* Toast */
.toast{
  position:fixed;bottom:18px;left:50%;
  transform:translateX(-50%) translateY(10px);
  background:var(--fg);color:var(--bg);padding:10px 14px;
  border-radius:12px;font-size:14px;opacity:0;
  transition:all .3s ease;z-index:20
}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}