:root{
  --bg:#fff8f1; --card:#ffffff; --ink:#1f1b2e; --muted:#6b6580; --line:#efe4d8;
  --accent:#ff6b4a; --accent2:#2b59c3; --ok:#1fa971; --warn:#f2a91f; --soft:#fff1e8;
  --r:18px; --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--font);-webkit-font-smoothing:antialiased}
.wrap{max-width:1100px;margin:0 auto;padding:0 16px}
[hidden]{display:none!important}
button{font-family:inherit}

.top{position:sticky;top:0;z-index:20;background:rgba(255,248,241,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.top__in{display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{display:flex;gap:9px;align-items:center;text-decoration:none;color:inherit;font-weight:800;font-size:20px}
.brand b{color:var(--accent)}
.brand__mark{background:var(--accent);color:#fff;border-radius:8px;font-size:12px;padding:4px 6px;font-weight:900}
.streak{font-weight:800;background:var(--card);border:1px solid var(--line);border-radius:99px;padding:4px 12px}
.streak small{font-weight:500;color:var(--muted)}

.hero{display:grid;grid-template-columns:1.4fr 1fr;gap:20px;align-items:center;padding-top:26px;padding-bottom:16px}
@media (max-width:820px){.hero{grid-template-columns:1fr}}
h1{font-size:clamp(28px,4.2vw,44px);line-height:1.12;margin:0 0 10px;letter-spacing:-.02em}
.hl{color:var(--accent)}
.lead{color:var(--muted);margin:0;font-size:17px}
.lead b{color:var(--ink)}
.progress-card{display:flex;gap:18px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px;box-shadow:0 6px 24px rgba(255,107,74,.08)}
.ring{--p:0;width:112px;height:112px;flex:none;border-radius:50%;display:grid;place-items:center;background:conic-gradient(var(--ok) calc(var(--p)*1%),#f1ebe4 0)}
.ring__in{width:88px;height:88px;border-radius:50%;background:var(--card);display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1}
.ring__in b{font-size:28px}
.ring__in span{font-size:12px;color:var(--muted)}
.pc__t{margin:0;font-weight:800}
.pc__goal{margin:2px 0 8px;color:var(--muted);font-size:14px}
.goalbar{height:8px;border-radius:99px;background:#f1ebe4;overflow:hidden;margin-bottom:12px}
.goalbar span{display:block;height:100%;width:0;background:var(--accent);transition:width .3s}

.app{padding-top:8px}
.tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:6px;position:sticky;top:64px;z-index:10}
.tab{border:0;background:transparent;border-radius:11px;padding:11px 6px;font-weight:700;font-size:15px;color:var(--muted);cursor:pointer}
.tab.is-on{background:var(--accent);color:#fff}
@media (max-width:520px){.tab{font-size:13px;padding:10px 2px}}

.filters{display:grid;grid-template-columns:2fr repeat(4,1fr);gap:8px;margin:14px 0}
@media (max-width:900px){.filters{grid-template-columns:1fr 1fr}.filters input{grid-column:1/-1}}
input[type=search],input[type=text],select{width:100%;border:1px solid var(--line);background:var(--card);color:var(--ink);border-radius:12px;padding:11px 12px;font:inherit;font-size:15px}
input:focus,select:focus{outline:2px solid var(--accent);outline-offset:1px}
.meta{color:var(--muted);font-size:14px;margin:0 0 10px}

.grid{list-style:none;margin:0 0 14px;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:10px}
.item{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:14px;display:flex;flex-direction:column;gap:4px;position:relative}
.item.is-learned{border-color:#bfe8d6;background:#f6fffa}
.item.is-review{border-color:#f7dca2}
.item__top{display:flex;justify-content:space-between;align-items:center;gap:6px}
.item__n{font-size:12px;color:var(--muted);font-weight:700}
.item__en{font-size:19px;font-weight:800;margin:0;display:flex;align-items:center;gap:6px}
.item__es{margin:0;color:var(--accent2);font-weight:600}
.item__ex{margin:4px 0 0;font-size:14px}
.item__exEs{margin:0;font-size:13.5px;color:var(--muted)}
.item__act{display:flex;gap:6px;margin-top:8px}
.chip{border:1px solid var(--line);background:var(--bg);border-radius:99px;padding:5px 10px;font-size:12.5px;font-weight:700;cursor:pointer;color:var(--muted)}
.chip.on-learned{background:var(--ok);border-color:var(--ok);color:#fff}
.chip.on-review{background:var(--warn);border-color:var(--warn);color:#fff}
.badge{font-size:11.5px;font-weight:800;background:var(--soft);color:var(--accent);border-radius:99px;padding:2px 8px}

.say{border:0;background:var(--soft);border-radius:50%;width:32px;height:32px;cursor:pointer;font-size:15px;flex:none}
.say:hover{background:#ffe2d3}
.say--big{width:64px;height:64px;font-size:28px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:0;border-radius:13px;padding:12px 18px;font-weight:800;font-size:15px;cursor:pointer;text-decoration:none}
.btn:active{transform:translateY(1px)}
.btn--primary{background:var(--accent);color:#fff}
.btn--ghost{background:var(--card);border:1px solid var(--line);color:var(--ink)}
.btn--sm{padding:8px 14px;font-size:14px}
.btn--wide{width:100%}
.btn--ok{background:var(--ok);color:#fff}
.btn--review{background:#fff3d6;color:#8a5a00;border:1px solid #f7dca2}
.linkbtn{background:none;border:0;color:var(--accent2);font-weight:700;cursor:pointer;padding:6px;font-size:14px}
.linkbtn.danger{color:#c0392b}
.check{display:flex;gap:6px;align-items:center;font-size:14px;color:var(--muted)}
.check input{accent-color:var(--accent);width:17px;height:17px}

/* tarjetas */
.flash{perspective:1200px;max-width:560px;margin:0 auto;cursor:pointer;outline:none}
.flash__inner{position:relative;height:310px;transition:transform .45s;transform-style:preserve-3d}
.flash.is-flipped .flash__inner{transform:rotateY(180deg)}
@media (prefers-reduced-motion:reduce){.flash__inner{transition:none}}
.flash__face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden;background:var(--card);border:1px solid var(--line);border-radius:24px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:22px;text-align:center;box-shadow:0 10px 30px rgba(31,27,46,.06)}
.flash__front .badge{position:absolute;top:16px;left:16px}
.flash__back{transform:rotateY(180deg);background:linear-gradient(180deg,#fff,#fff6ef)}
.flash__word{font-size:clamp(30px,6vw,44px);font-weight:900;margin:0;letter-spacing:-.01em}
.flash__hint{color:var(--muted);font-size:13px;margin:0}
.flash__es{font-size:clamp(24px,4.5vw,32px);font-weight:800;color:var(--accent2);margin:0}
.flash__ex{margin:0;font-size:17px;display:flex;align-items:center;gap:8px;justify-content:center;flex-wrap:wrap}
.flash__exEs{margin:0;color:var(--muted)}
.flash__btns{display:grid;grid-template-columns:1fr 1fr;gap:10px;max-width:560px;margin:14px auto 6px}
.flash__nav{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:6px;max-width:560px;margin:0 auto}

/* quiz y dictado */
.quiz{max-width:620px;margin:0 auto;background:var(--card);border:1px solid var(--line);border-radius:24px;padding:22px;text-align:center}
.quiz__top{display:flex;justify-content:space-between;color:var(--muted);font-size:14px;margin-bottom:12px}
.quiz__ask{margin:0;color:var(--muted)}
.quiz__word{font-size:clamp(26px,5vw,36px);font-weight:900;margin:6px 0 16px;display:flex;gap:10px;align-items:center;justify-content:center}
.quiz__opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media (max-width:520px){.quiz__opts{grid-template-columns:1fr}}
.opt{border:2px solid var(--line);background:var(--bg);border-radius:14px;padding:14px;font-size:16px;font-weight:700;cursor:pointer;color:var(--ink)}
.opt:hover:not(:disabled){border-color:var(--accent)}
.opt.is-ok{border-color:var(--ok);background:#e9fbf3}
.opt.is-bad{border-color:#e74c3c;background:#fdecea}
.quiz__fb{min-height:24px;margin:12px 0;font-weight:700}
.quiz__fb.ok{color:var(--ok)}
.quiz__fb.bad{color:#c0392b}
.quiz__big{font-size:56px;font-weight:900;margin:0;color:var(--accent)}
.dict__play{display:flex;justify-content:center;align-items:center;gap:12px;margin:6px 0}
.dict__clue{color:var(--muted);margin:6px 0 14px}
.dict__form{display:flex;gap:8px}
.dict__form input{flex:1;font-size:17px}
.note{color:var(--muted);font-size:13px;text-align:center}

.tts-warn{background:#fff3d6;border:1px solid #f7dca2;border-radius:12px;padding:10px 14px;font-size:14px;margin-top:14px}
.settings{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:center;margin:22px 0 4px;font-size:13px;color:var(--muted)}
.settings label{display:flex;flex-direction:column;gap:4px}
.settings select{padding:7px 10px;font-size:14px}

.ad-slot{margin:26px auto;min-height:90px;border:1px dashed #e3d4c4;border-radius:14px;display:grid;place-items:center;color:#c8b4a0;font-size:12px;letter-spacing:.08em;text-transform:uppercase}

.section{padding:40px 16px}
.section h2{text-align:center;font-size:clamp(23px,3vw,32px);margin:0 0 18px}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:760px){.steps{grid-template-columns:1fr}}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.step__n{display:grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--accent);color:#fff;font-weight:900}
.step h3{margin:10px 0 4px}
.step p{margin:0;color:var(--muted)}
details{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:10px auto;max-width:800px}
summary{cursor:pointer;font-weight:700}
details p{color:var(--muted);margin:10px 0 0}
.footer{border-top:1px solid var(--line);margin-top:20px}
.footer__in{display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;padding:20px 16px;color:var(--muted);font-size:13px}
.toast{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(20px);background:var(--ink);color:#fff;padding:10px 16px;border-radius:12px;font-weight:700;font-size:14px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:50;max-width:calc(100% - 32px);text-align:center}
.toast.is-on{opacity:1;transform:translateX(-50%) translateY(0)}

/* temas y páginas SEO */
.sub{text-align:center;color:var(--muted);margin:-8px 0 18px}
.topic-grid{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:10px}
.topic-grid a{display:block;height:100%;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px 16px;font-weight:700;text-decoration:none;color:var(--ink)}
.topic-grid a:hover{border-color:var(--accent);color:var(--accent)}
.topic-banner{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;background:var(--soft);border:1px solid #ffd2c2;border-radius:14px;padding:10px 14px;margin-bottom:10px;font-size:15px}
.topic-banner a{color:var(--accent2);font-weight:700}
.seo{padding-top:18px;padding-bottom:30px}
.seo h1{font-size:clamp(26px,4vw,40px)}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:10px}
.crumbs a{color:var(--accent2)}
.seo__cta{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:18px 0}
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px;background:var(--card)}
.vocab{width:100%;border-collapse:collapse;font-size:15px;min-width:560px}
.vocab th{background:var(--soft);text-align:left;padding:11px 12px;font-size:13px;text-transform:uppercase;letter-spacing:.05em;color:var(--muted)}
.vocab td{padding:10px 12px;border-top:1px solid var(--line);vertical-align:top}
.vocab td.n{color:var(--muted);font-size:13px;width:40px}
.vocab td.en{white-space:nowrap}
.vocab td.en b{font-size:16.5px;margin-right:4px}
.vocab td.es{color:var(--accent2);font-weight:600}
.vocab td.ex span{color:var(--muted);font-size:13.5px}
.vocab .say{width:28px;height:28px;font-size:13px;vertical-align:middle}
.vocab b.big{font-size:24px}
.seo__box{margin-top:28px}
.seo__box h2{font-size:22px;margin:0 0 10px}
.tips{padding-left:20px;margin:0}
.tips li{margin:6px 0}
.related{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:8px}
.related a{display:inline-block;background:var(--card);border:1px solid var(--line);border-radius:99px;padding:6px 12px;font-size:14px;text-decoration:none;color:var(--ink)}
.related a[aria-current]{background:var(--accent);border-color:var(--accent);color:#fff}
.footer__in a{color:var(--muted)}

/* páginas institucionales */
.legal{max-width:780px}
.legal h1{font-size:clamp(26px,4vw,38px);margin:6px 0 14px}
.legal h2{font-size:21px;margin:28px 0 8px}
.legal p,.legal li{color:#3d3850}
.legal li{margin:5px 0}
.legal a{color:var(--accent2)}
.legal .meta{font-size:14px}