:root{
  --pink:#D9638E; --pink-soft:#F0A8C0; --pink-deep:#A63A64;
  --bg:#1a1a1a; --bg2:#242424; --bg3:#2e2e2e; --ink:#f5f5f5; --muted:#cfcfcf; --line:#444;
  --dark:#111;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:Arial,Helvetica,sans-serif;font-size:20px;line-height:1.7}
a{color:var(--pink-soft);text-underline-offset:3px}
a:hover{color:#fff}
:focus-visible{outline:3px solid #fff;outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:#fff;color:#000;padding:.8rem 1.2rem;z-index:999;font-weight:800}
.skip:focus{left:0}
.wrap{max-width:1000px;margin:0 auto}
section{padding:4.5rem 1.5rem}
.alt{background:var(--bg2)}
h1{font-size:clamp(2.1rem,5.5vw,3.3rem);font-weight:900;line-height:1.15;margin-bottom:.8rem}
h2{font-size:clamp(1.6rem,3.6vw,2.3rem);font-weight:900;line-height:1.2;margin-bottom:.8rem}
h3{font-size:1.25rem;font-weight:800;margin-bottom:.4rem;color:#fff}
p{color:var(--muted);margin-bottom:1rem}
strong,.hl{color:#fff;font-weight:800}
.pink{color:var(--pink);font-weight:900}
.eyebrow{display:inline-block;background:var(--pink);color:var(--dark);font-size:.8rem;font-weight:900;letter-spacing:1.5px;text-transform:uppercase;padding:.3rem 1rem;border-radius:20px;margin-bottom:1.1rem}
.langtag{display:inline-block;font-size:.72rem;font-weight:900;letter-spacing:1.5px;text-transform:uppercase;color:var(--pink-soft);border:1.5px solid var(--pink);border-radius:20px;padding:.12rem .7rem;margin-bottom:.6rem}

/* bilingual pair */
.bi{display:grid;grid-template-columns:1fr 2px 1fr;align-items:start}
.bi>.col:first-child{padding-right:1.6rem}
.bi>.col:last-child{padding-left:1.6rem}
.rule{background:rgba(217,99,142,.45);align-self:stretch;border-radius:2px}
@media(max-width:720px){
  .bi{grid-template-columns:1fr}
  .bi>.col:first-child{padding-right:0}
  .bi>.col:last-child{padding-left:0}
  .rule{height:2px;margin:1.4rem 0}
  body{font-size:19px}
}

/* nav */
nav{background:var(--dark);border-bottom:3px solid var(--pink);padding:.9rem 1.5rem;position:sticky;top:0;z-index:50}
nav .wrap{display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap}
.logo{font-weight:900;color:var(--pink);font-size:1.05rem;line-height:1.25;text-decoration:none}
.logo span{color:#fff}

/* buttons: dark text on hot pink for contrast */
.btn{display:inline-block;background:var(--pink);color:var(--dark);font-weight:900;font-size:1.15rem;padding:1rem 2.2rem;border-radius:50px;border:none;cursor:pointer;text-decoration:none;min-height:58px;line-height:1.3;text-align:center}
.btn:hover{background:var(--pink-soft);color:var(--dark)}
.btn.ghost{background:transparent;color:var(--pink-soft);border:2.5px solid var(--pink)}
.btn.ghost:hover{background:var(--pink);color:var(--dark)}
.btn.small{font-size:1rem;padding:.7rem 1.5rem;min-height:46px}
.btnrow{display:flex;flex-wrap:wrap;gap:1rem;margin-top:1.2rem}

/* hero */
#hero{background:linear-gradient(140deg,#0d0006 0%,#1f0011 55%,#1a1a1a 100%);padding:5rem 1.5rem 4rem}
.hero-sub{font-size:1.2rem;color:var(--ink)}

/* cards */
.card{background:var(--bg3);border:1.5px solid var(--line);border-radius:16px;padding:1.8rem 1.6rem;margin-bottom:1.2rem}
.card .ico{font-size:2.2rem;margin-bottom:.4rem}
.step{display:grid;grid-template-columns:68px 1fr;gap:1.2rem;margin-bottom:1.3rem;align-items:start}
.num{width:68px;height:68px;border-radius:50%;background:var(--pink);color:var(--dark);font-size:1.6rem;font-weight:900;display:flex;align-items:center;justify-content:center}
.stepbox{background:var(--bg2);border:1.5px solid var(--line);border-radius:16px;padding:1.4rem 1.6rem}
@media(max-width:480px){.step{grid-template-columns:54px 1fr}.num{width:54px;height:54px;font-size:1.3rem}}

/* form */
.formcard{background:var(--bg3);border:2px solid var(--pink);border-radius:22px;padding:2.4rem 1.8rem;max-width:700px;margin:0 auto}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
@media(max-width:560px){.row2{grid-template-columns:1fr}}
.field{margin-bottom:1.3rem}
label{display:block;font-weight:800;color:#fff;margin-bottom:.45rem;line-height:1.4}
label small{color:var(--muted);font-weight:600;font-size:.9rem}
.req{color:var(--pink-soft)}
input[type=text],input[type=email],select,textarea{width:100%;background:#121212;border:2px solid #666;border-radius:12px;padding:.9rem 1.1rem;color:#fff;font-size:1.05rem;font-family:inherit}
input:focus,select:focus,textarea:focus{border-color:var(--pink);outline:3px solid #fff;outline-offset:2px}
textarea{min-height:115px;resize:vertical}
.consent{display:flex;gap:.9rem;align-items:flex-start}
.consent input{width:26px;height:26px;margin-top:.25rem;accent-color:var(--pink);flex-shrink:0}
.consent label{font-weight:600;color:var(--muted);margin:0}
.hp{position:absolute;left:-9999px}

/* faq */
details{background:var(--bg3);border:1.5px solid var(--line);border-radius:14px;padding:1rem 1.3rem;margin-bottom:.9rem}
summary{cursor:pointer;font-weight:800;color:#fff;list-style:none}
summary::-webkit-details-marker{display:none}
summary::after{content:"＋";float:right;color:var(--pink-soft)}
details[open] summary::after{content:"－"}
details .bi{margin-top:1rem}
details p{margin:0;font-size:.97rem}

footer{background:#0b0b0b;border-top:3px solid var(--pink);padding:2.5rem 1.5rem;text-align:center}
footer p{color:#bbb;font-size:.95rem;margin-bottom:.5rem}
footer a{color:var(--pink-soft)}

/* legal pages */
.legal h2{font-size:1.4rem;margin-top:2rem}
.legal ul{margin:0 0 1rem 1.3rem;color:var(--muted)}
.legal li{margin-bottom:.4rem}
[hidden]{display:none!important}
button,input,select,textarea{font-family:inherit}
.sico{display:inline-block;width:1.25em;height:1.25em;fill:currentColor;vertical-align:-.25em;margin-right:.5em;flex-shrink:0}
footer .sico{width:1.1em;height:1.1em;margin-right:.35em}

/* ===== Interactive additions ===== */
.toolbar{background:var(--bg2);border-bottom:1px solid var(--bg3);padding:.5rem 1rem;display:flex;flex-wrap:wrap;gap:.6rem;justify-content:center;align-items:center;font-size:.8rem}
.toolbar .tlabel{color:var(--muted)}
.tbtn{background:var(--bg3);color:var(--ink);border:2px solid var(--bg3);border-radius:999px;padding:.45rem 1rem;font:inherit;font-size:.8rem;cursor:pointer;min-height:44px}
.tbtn[aria-pressed="true"]{border-color:var(--pink);color:var(--pink)}
.navlinks{display:flex;gap:.6rem;align-items:center;flex-wrap:wrap}
html[data-show="en"] .col[lang="es"],html[data-show="es"] .col[lang="en"],html[data-show="en"] .bi>.rule,html[data-show="es"] .bi>.rule{display:none}
html[data-show="en"] .bi,html[data-show="es"] .bi{grid-template-columns:1fr}
html[data-size="big"] body{font-size:24px}
.quizbox,.pcard,.lesson,.check,.tryit{background:var(--bg2);border:2px solid var(--bg3);border-radius:16px;padding:1.4rem;margin:1.2rem 0}
.tryit{border-color:var(--pink)}
.qopt{display:block;width:100%;text-align:left;background:var(--bg3);color:var(--ink);border:2px solid var(--bg3);border-radius:12px;padding:1rem 1.2rem;margin:.6rem 0;font:inherit;cursor:pointer;min-height:58px}
.qopt:hover,.qopt:focus-visible{border-color:var(--pink)}
.qopt.right{border-color:#4cd964}
.qopt.wrong{border-color:#ff6b6b}
.qprog{color:var(--muted);font-size:.8rem}
.fb{margin-top:.6rem;font-weight:700}
.prompt{background:var(--dark);border-left:4px solid var(--pink);padding:.8rem 1rem;border-radius:8px;margin:.6rem 0}
.pgrid{display:grid;gap:1rem;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.note{color:var(--muted);font-size:.85rem}
.checklist label{display:flex;gap:.7rem;align-items:flex-start;margin:.6rem 0;cursor:pointer}
.checklist input{width:28px;height:28px;flex:none;accent-color:#D9638E}