:root{--bg:#f6f8fb;--card:#fff;--ink:#14202e;--muted:#5b6b7c;--line:#dde4ec;--brand:#0e8f7e;--brand2:#0b6f62;--soft:#e6f5f2;--warn:#b45309;--radius:14px}
@media (prefers-color-scheme:dark){:root{--bg:#0f1720;--card:#16212c;--ink:#e8eef4;--muted:#9fb0c0;--line:#243342;--brand:#2dd4bf;--brand2:#5eead4;--soft:#12322f;--warn:#fbbf24}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
a{color:var(--brand2)}
.wrap{max-width:1040px;margin:0 auto;padding:0 16px}
header.top{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
header.top .wrap{display:flex;align-items:center;gap:16px;min-height:56px;flex-wrap:wrap}
.logo{font-weight:800;font-size:1.25rem;text-decoration:none;color:var(--ink)}
.logo span{color:var(--brand)}
nav.main{display:flex;gap:4px 14px;flex-wrap:wrap;margin-left:auto}
nav.main a{color:var(--muted);text-decoration:none;font-size:.92rem;padding:4px 0}
nav.main a:hover{color:var(--brand2)}
main{padding:22px 0 40px}
h1{font-size:1.8rem;line-height:1.25;margin:.2em 0 .3em}
h2{font-size:1.25rem;margin:1.6em 0 .5em}
.lead{color:var(--muted);margin:0 0 1em}
.crumbs{font-size:.85rem;color:var(--muted)}
.crumbs a{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin:14px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px}
.tile{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:14px;text-decoration:none;color:var(--ink);transition:.15s}
.tile:hover{border-color:var(--brand);transform:translateY(-2px)}
.tile b{display:block;margin-bottom:2px}
.tile small{color:var(--muted)}
.hero{padding:26px 0 8px}
.hero h1{font-size:2.1rem}
.cat{margin:28px 0 8px;font-size:1.1rem;color:var(--muted);text-transform:uppercase;letter-spacing:.06em}
label{display:block;font-weight:600;font-size:.92rem;margin:10px 0 4px}
input,select,textarea,button{font:inherit;color:inherit}
input[type=text],input[type=number],input[type=date],input[type=time],input[type=url],input[type=email],input[type=password],select,textarea{width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
textarea{min-height:110px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);outline-offset:1px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row>*{flex:1 1 140px}
.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:10px;padding:10px 16px;font-weight:700;cursor:pointer;text-decoration:none}
@media (prefers-color-scheme:dark){.btn{color:#06201c}}
.btn:hover{filter:brightness(1.08)}
.btn.alt{background:transparent;color:var(--brand2);border:1px solid var(--line)}
.btn.sm{padding:6px 10px;font-size:.88rem}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.out{margin-top:12px;padding:14px;background:var(--soft);border-radius:10px;word-break:break-word}
.big{font-size:2rem;font-weight:800}
.muted{color:var(--muted)}
.note{font-size:.85rem;color:var(--warn)}
table{width:100%;border-collapse:collapse;font-size:.92rem}
th,td{padding:7px 8px;border-bottom:1px solid var(--line);text-align:left}
th{color:var(--muted);font-weight:600}
ul.list{list-style:none;margin:0;padding:0}
ul.list li{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line)}
ul.list li span.t{flex:1;word-break:break-word}
ul.list li.done span.t{text-decoration:line-through;color:var(--muted)}
.chip{display:inline-block;background:var(--soft);color:var(--brand2);border-radius:99px;padding:2px 10px;font-size:.8rem}
.ad{margin:18px 0;min-height:90px;display:flex;align-items:center;justify-content:center;border:1px dashed var(--line);border-radius:10px;color:var(--muted);font-size:.75rem;overflow:hidden}
.ad.empty{display:none}
.promo{background:linear-gradient(135deg,var(--soft),var(--card));border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:20px 0;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.promo b{display:block}
.faq details{border-bottom:1px solid var(--line);padding:10px 0}
.faq summary{cursor:pointer;font-weight:600}
.related{display:flex;gap:8px;flex-wrap:wrap}
.related a{background:var(--card);border:1px solid var(--line);border-radius:99px;padding:5px 12px;text-decoration:none;font-size:.9rem}
footer.bot{border-top:1px solid var(--line);background:var(--card);padding:20px 0;color:var(--muted);font-size:.88rem}
footer.bot a{color:var(--muted);margin-right:14px}
#cmp{position:fixed;left:12px;right:12px;bottom:12px;z-index:50;max-width:620px;margin:auto;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;box-shadow:0 8px 30px rgba(0,0,0,.2);display:none;font-size:.9rem}
#cmp .btns{margin-top:8px}
canvas{max-width:100%;border-radius:8px}
.board{display:grid;gap:6px;touch-action:manipulation}
.cell{aspect-ratio:1;display:flex;align-items:center;justify-content:center;border-radius:10px;font-weight:800;background:var(--soft);user-select:none}
@media (max-width:640px){h1{font-size:1.5rem}.hero h1{font-size:1.7rem}nav.main{margin-left:0}}

/* ======== Rediseño v2 ======== */
body{background:radial-gradient(1200px 500px at 85% -120px,rgba(45,212,191,.16),transparent 60%),radial-gradient(900px 400px at -10% 0,rgba(14,143,126,.10),transparent 55%),var(--bg);background-attachment:fixed}
.logo{display:flex;align-items:center;gap:9px;font-size:1.3rem;letter-spacing:-.01em}
.logo img{border-radius:9px;display:block}
header.top{backdrop-filter:saturate(1.4) blur(10px);background:color-mix(in srgb,var(--card) 82%,transparent)}
nav.main a{padding:6px 10px;border-radius:99px;transition:.15s}
nav.main a:hover{background:var(--soft);color:var(--brand2)}
.cat-codigos{--g1:#0e8f7e;--g2:#2dd4bf}.cat-calculadoras{--g1:#2563eb;--g2:#60a5fa}.cat-dinero{--g1:#d97706;--g2:#fbbf24}
.cat-tiempo{--g1:#7c3aed;--g2:#a78bfa}.cat-juegos{--g1:#e11d48;--g2:#fb7185}.cat-educacion{--g1:#0284c7;--g2:#38bdf8}.cat-vida{--g1:#db2777;--g2:#f472b6}
.ticon{flex:0 0 auto;width:46px;height:46px;border-radius:14px;display:inline-flex;align-items:center;justify-content:center;font-size:1.5rem;background:linear-gradient(135deg,var(--g1,#0e8f7e),var(--g2,#2dd4bf));box-shadow:0 6px 14px -6px var(--g1,#0e8f7e);line-height:1}
/* Portada */
.hero{padding:34px 0 10px}
.hero-in{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}
.hero-txt .pill{display:inline-block;background:var(--soft);color:var(--brand2);border:1px solid var(--line);border-radius:99px;padding:5px 14px;font-size:.85rem;font-weight:700}
.hero h1{font-size:2.7rem;line-height:1.12;letter-spacing:-.02em;margin:.4em 0 .35em}
.grad{background:linear-gradient(100deg,var(--brand) 10%,#f59e0b 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:1.08rem;max-width:34em}
.search{display:flex;align-items:center;gap:10px;background:var(--card);border:2px solid var(--line);border-radius:16px;padding:6px 14px;margin:18px 0 6px;box-shadow:0 10px 30px -18px rgba(14,143,126,.7);transition:.15s}
.search:focus-within{border-color:var(--brand)}
.search input{border:0!important;background:transparent!important;outline:0!important;padding:11px 0!important;font-size:1.02rem}
.stats{display:flex;gap:22px;margin-top:16px;flex-wrap:wrap}
.stats div{display:flex;flex-direction:column;line-height:1.15}
.stats b{font-size:1.55rem;color:var(--brand2)}
.stats span{font-size:.82rem;color:var(--muted)}
.hero-img img{width:100%;height:auto;border-radius:26px;display:block;box-shadow:0 30px 60px -30px rgba(14,143,126,.65);border:1px solid var(--line)}
/* Tarjetas */
.grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr))}
.tile{display:flex;align-items:center;gap:13px;padding:14px;border-radius:18px;box-shadow:0 1px 0 rgba(0,0,0,.02)}
.tile:hover{border-color:transparent;transform:translateY(-3px);box-shadow:0 16px 30px -18px var(--g1,#0e8f7e),0 0 0 2px var(--brand)}
.tile b{font-size:.98rem;margin:0 0 1px}
.tile small{display:block;line-height:1.35;font-size:.82rem}
.tile.pop{background:linear-gradient(135deg,var(--card),var(--soft))}
.cat{display:flex;align-items:center;gap:10px;margin:34px 0 12px;font-size:1.25rem;color:var(--ink);text-transform:none;letter-spacing:0}
.cat span{font-size:1.4rem}
.cat em{font-style:normal;font-size:.78rem;background:var(--soft);color:var(--brand2);border-radius:99px;padding:2px 10px;font-weight:700}
.whygrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px}
.whygrid span{font-size:1.7rem}
.whygrid b{display:block;margin:4px 0 2px}
.whygrid p{margin:0;color:var(--muted);font-size:.9rem}
.card{box-shadow:0 14px 34px -26px rgba(15,35,50,.55)}
.why{margin-top:34px}
/* Páginas de herramientas */
.thead{display:flex;align-items:center;gap:16px;padding:18px;margin:10px 0 6px;border-radius:20px;background:linear-gradient(135deg,var(--card),var(--soft));border:1px solid var(--line)}
.thead .ticon{width:62px;height:62px;border-radius:18px;font-size:2rem}
.thead h1{margin:0;font-size:1.6rem}
.thead .lead{margin:.15em 0 0}
.btn{background:linear-gradient(135deg,var(--brand),var(--brand2));box-shadow:0 8px 18px -10px var(--brand)}
.btn.alt{background:transparent;box-shadow:none}
.promo{background:linear-gradient(135deg,#0e8f7e22,#f59e0b22);border-radius:18px}
footer.bot{margin-top:30px}
.flogo{display:flex;align-items:center;gap:8px;color:var(--ink);font-size:1.05rem}
.flogo img{border-radius:8px}.flogo span{color:var(--brand)}
@media (max-width:860px){.hero-in{grid-template-columns:1fr}.hero h1{font-size:2.05rem}.hero-img{order:-1}.thead{padding:14px}.thead .ticon{width:52px;height:52px}}
@media (max-width:520px){.hero h1{font-size:1.75rem}.stats{gap:16px}.grid{grid-template-columns:1fr}}
.search input{flex:1 1 auto;width:100%;min-width:0;box-shadow:none!important}
.search input::placeholder{color:var(--muted);opacity:.9}