:root{
  --accent:#4f46e5; --accent-2:#7c3aed; --bg:#f8f8fc; --card:#ffffff;
  --text:#17172b; --muted:#5c5c74; --line:#e4e4f0; --ok:#16a34a; --radius:14px;
}
@media (prefers-color-scheme:dark){
  :root{ --bg:#0f0f18; --card:#171724; --text:#ececf5; --muted:#a0a0b8; --line:#2a2a3d; }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text)}
.wrap{max-width:1060px;margin:0 auto;padding:0 18px}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.muted{color:var(--muted)} .small{font-size:.85rem}
b{color:var(--text)}

/* topbar */
.topbar{position:sticky;top:0;z-index:50;background:var(--card);border-bottom:1px solid var(--line)}
.bar-inner{display:flex;align-items:center;justify-content:space-between;height:56px}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;color:var(--text);font-weight:700;font-size:1.12rem}
.brand b{color:var(--accent)}
.topnav a{color:var(--muted);text-decoration:none;margin-left:16px;font-size:.93rem}
.topnav a:hover{color:var(--accent)}

/* hero + tool */
.hero{padding:34px 18px 10px}
h1{font-size:clamp(1.5rem,3.4vw,2.3rem);line-height:1.2;margin:.2em 0}
h1 .muted{display:block;font-size:.55em;font-weight:600}
.lead{max-width:760px;color:var(--muted);margin:.4em 0 1.2em}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.tool-card{box-shadow:0 8px 28px rgba(79,70,229,.09)}
.row-input{display:flex;gap:10px;flex-wrap:wrap}
.row-input input{flex:1;min-width:230px;padding:13px 15px;font-size:1.02rem;border:1.5px solid var(--line);border-radius:10px;background:var(--bg);color:var(--text)}
.row-input input:focus{outline:2px solid var(--accent);border-color:var(--accent)}
.btn{border:0;border-radius:10px;padding:12px 18px;font-size:1rem;font-weight:700;cursor:pointer;transition:filter .15s}
.btn:hover{filter:brightness(1.08)}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff}
.btn-ghost{background:transparent;border:1.5px solid var(--line);color:var(--text)}
.btn.small{padding:8px 13px;font-size:.86rem}
fieldset{border:0;margin:14px 0 0;padding:0}
legend{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em;color:var(--muted);margin-bottom:7px}
.chip{display:inline-flex;align-items:center;gap:7px;border:1.5px solid var(--line);border-radius:999px;padding:6px 13px;margin:0 8px 8px 0;cursor:pointer;font-size:.9rem;user-select:none;background:var(--card)}
.chip input{accent-color:var(--accent);margin:0}
.chip:has(input:checked){border-color:var(--accent);background:rgba(79,70,229,.07)}

/* progress */
.progress-wrap{display:flex;align-items:center;gap:12px;margin:16px 0}
.progress{flex:1;height:8px;background:var(--line);border-radius:99px;overflow:hidden}
#progress-bar{height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent-2));transition:width .2s}

/* toolbar + results */
.toolbar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:18px 0 6px;font-size:.92rem}
.toolbar .sep{width:1px;height:20px;background:var(--line)}
.inline{display:inline-flex;align-items:center;gap:6px}
.results{list-style:none;margin:8px 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:8px}
.results li{display:flex;align-items:center;gap:10px;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:9px 12px}
.results li input{accent-color:var(--accent);flex:none}
.results li .kw{flex:1;font-size:.93rem;cursor:pointer;word-break:break-word}
.results li .kw:hover{color:var(--accent)}
.results li .eng{flex:none;font-size:.66rem;font-weight:700;letter-spacing:.04em;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:2px 6px;text-transform:uppercase}
#empty-hint{margin-top:10px}

/* sections */
.section{padding:34px 18px}
.section h2{font-size:1.45rem;margin:.2em 0 .5em}
.section h3{font-size:1.05rem;margin:.1em 0 .35em}
.section p{color:var(--muted)}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.steps{color:var(--muted);padding-left:20px}
.steps li{margin:8px 0}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;margin-bottom:8px;overflow:hidden}
.faq summary{padding:13px 15px;font-weight:700;cursor:pointer;list-style:none}
.faq summary::after{content:"+";float:right;color:var(--accent);font-weight:800}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:0;padding:0 15px 14px;color:var(--muted)}

/* footer */
.footer{border-top:1px solid var(--line);background:var(--card);margin-top:26px;padding:22px 0 90px}
.foot-inner{display:flex;flex-direction:column;gap:4px}

/* ============ AD ZONES (monetización — no borrar) ============ */
.ad-zone{display:flex;align-items:center;justify-content:center;min-height:0;margin:14px auto}
#ad-slot-banner-top{min-height:0;margin-top:0}
.ad-mid{margin:20px auto}
.ad-video{margin:26px auto;text-align:center}

/* SLOT 3: banner de pie flotante */
.floating-footer{position:fixed;left:0;right:0;bottom:0;z-index:9999;background:var(--card);border-top:1.5px solid var(--line);box-shadow:0 -6px 24px rgba(0,0,0,.12);padding:8px 44px 8px 10px;padding-bottom:calc(8px + env(safe-area-inset-bottom))}
.floating-footer:empty{display:none}
.ff-inner{max-width:980px;margin:0 auto;text-align:center;min-height:0}
.ff-close{position:absolute;top:4px;right:8px;background:none;border:0;font-size:22px;line-height:1;color:var(--muted);cursor:pointer;padding:4px}
.ff-close:hover{color:var(--text)}

/* SMARTLINK button (SLOT 5 — el PRIMERO de los dos botones; norma del usuario) */
.btn-smartlink{display:flex;width:100%;justify-content:center;align-items:center;gap:8px;margin:0 0 12px;padding:13px 18px;font-size:1rem;font-weight:800;border-radius:10px;text-decoration:none;color:#3b2a00;background:linear-gradient(135deg,#fbbf24,#f97316);box-shadow:0 4px 16px rgba(249,115,22,.35);border:0;cursor:pointer}
.btn-smartlink:hover{filter:brightness(1.07);color:#3b2a00}

@media (prefers-color-scheme:dark){
  .btn-smartlink{color:#2a1a00}
}

/* enlaces legales del footer */
.foot-links a{color:var(--muted);text-decoration:none;font-size:.9rem}
.foot-links a:hover{color:var(--accent)}

@media (max-width:720px){
  .grid-2{grid-template-columns:1fr}
  .results{grid-template-columns:1fr}
  .topnav{display:none}
}