:root{
  --teal:#0E7C86; --teal-dark:#0A5E66; --teal-soft:#E3F2F3;
  --coral:#FF7A59; --coral-dark:#E85D3F; --coral-soft:#FFE9E2;
  --cream:#FFF9F2; --ink:#22313A; --ink-soft:#5B6B74; --line:#EFE5D8;
  --ok:#2FA84F; --ok-bg:#E6F6EA; --bad:#D64545; --bad-bg:#FDECEC;
  --gold:#F5B93F; --radius:18px;
  --shadow:0 6px 24px rgba(34,49,58,.08), 0 2px 6px rgba(34,49,58,.05);
  --shadow-lg:0 16px 40px rgba(34,49,58,.14);
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent}
html{scroll-behavior:smooth}
body{margin:0; font-family:'Nunito',system-ui,sans-serif; color:var(--ink); background:#fff; line-height:1.55}
h1,h2,h3,h4,.font-display{font-family:'Baloo 2','Nunito',sans-serif; line-height:1.15; margin:0}
img{max-width:100%; display:block}
a{color:var(--teal); text-decoration:none}
button{font-family:inherit; cursor:pointer}
.wrap{max-width:1120px; margin:0 auto; padding:0 20px}
.btn{display:inline-flex; align-items:center; justify-content:center; gap:8px; border:none; border-radius:999px;
  padding:14px 26px; font-weight:800; font-size:1rem; transition:transform .15s, box-shadow .15s, background .15s; min-height:52px}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--coral); color:#fff; box-shadow:0 8px 20px rgba(255,122,89,.35)}
.btn-primary:hover{background:var(--coral-dark)}
.btn-teal{background:var(--teal); color:#fff; box-shadow:0 8px 20px rgba(14,124,134,.3)}
.btn-teal:hover{background:var(--teal-dark)}
.btn-ghost{background:#fff; color:var(--teal); border:2px solid var(--teal)}
.btn-soft{background:var(--teal-soft); color:var(--teal-dark)}
.btn-big{padding:17px 34px; font-size:1.1rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.45; pointer-events:none}
.chip{display:inline-flex; align-items:center; gap:6px; background:var(--teal-soft); color:var(--teal-dark);
  border-radius:999px; padding:5px 12px; font-weight:800; font-size:.83rem}
.chip.coral{background:var(--coral-soft); color:var(--coral-dark)}
.chip.gold{background:#FDF0D3; color:#92690E}

/* ---------- Landing ---------- */
.topbar{position:sticky; top:0; z-index:50; background:rgba(255,255,255,.92); backdrop-filter:blur(10px); border-bottom:1px solid var(--line)}
.topbar-in{display:flex; align-items:center; justify-content:space-between; height:66px}
.logo{font-family:'Baloo 2'; font-weight:800; font-size:1.45rem; color:var(--teal-dark); display:flex; gap:8px; align-items:center}
.logo .dot{color:var(--coral)}
.topbar nav{display:flex; gap:18px; align-items:center}
.topbar nav a{color:var(--ink); font-weight:700}
@media(max-width:640px){ .topbar nav a.navlink{display:none} }
.hero{background:linear-gradient(160deg,#FFF9F2 0%,#EAF6F6 55%,#FFF1E8 100%); padding:54px 0 64px; overflow:hidden}
.hero-grid{display:grid; grid-template-columns:1.05fr .95fr; gap:36px; align-items:center}
@media(max-width:860px){ .hero-grid{grid-template-columns:1fr} }
.hero h1{font-size:clamp(2.2rem,5.2vw,3.4rem); font-weight:800; color:var(--ink)}
.hero h1 em{font-style:normal; color:var(--teal)}
.hero h1 .u-coral{color:var(--coral)}
.hero p.lead{font-size:1.18rem; color:var(--ink-soft); margin:16px 0 26px; max-width:34rem}
.hero-img{border-radius:26px; box-shadow:var(--shadow-lg); transform:rotate(1deg)}
.hero-stats{display:flex; flex-wrap:wrap; gap:10px; margin-top:28px}
.stat-chip{background:#fff; border:1px solid var(--line); border-radius:14px; padding:10px 16px; box-shadow:var(--shadow); font-weight:700; font-size:.92rem}
.stat-chip b{font-family:'Baloo 2'; font-size:1.15rem; color:var(--teal-dark)}
.section{padding:64px 0}
.section.alt{background:var(--cream)}
.section h2{font-size:clamp(1.7rem,3.6vw,2.4rem); font-weight:800; text-align:center}
.section .sub{text-align:center; color:var(--ink-soft); max-width:38rem; margin:12px auto 38px; font-size:1.05rem}
.levels-grid{display:grid; grid-template-columns:repeat(auto-fill,minmax(230px,1fr)); gap:18px}
.level-card{border-radius:var(--radius); padding:20px; color:#fff; box-shadow:var(--shadow); position:relative; overflow:hidden}
.level-card h3{font-size:1.25rem}
.level-card .cefr{font-family:'Baloo 2'; font-size:2rem; font-weight:800; opacity:.95}
.level-card p{margin:4px 0 0; opacity:.92; font-weight:600; font-size:.92rem}
.level-card .counts{margin-top:12px; display:flex; gap:8px; flex-wrap:wrap}
.level-card .counts span{background:rgba(255,255,255,.22); border-radius:999px; padding:3px 10px; font-size:.8rem; font-weight:800}
.features-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(240px,1fr)); gap:18px}
.feature{background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:24px; box-shadow:var(--shadow)}
.feature .ico{font-size:2.2rem}
.feature h3{margin:10px 0 6px; font-size:1.2rem}
.feature p{color:var(--ink-soft); margin:0}
.plans-grid{display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,380px)); gap:20px; justify-content:center}
.plan{background:#fff; border:2px solid var(--line); border-radius:22px; padding:30px; box-shadow:var(--shadow)}
.plan.hot{border-color:var(--teal); position:relative}
.plan .tag{position:absolute; top:-14px; left:50%; transform:translateX(-50%); background:var(--teal); color:#fff; padding:4px 14px; border-radius:999px; font-weight:800; font-size:.8rem}
.plan h3{font-size:1.5rem}
.plan .price{font-family:'Baloo 2'; font-size:2.4rem; font-weight:800; color:var(--teal-dark); margin:8px 0}
.plan .price small{font-size:1rem; color:var(--ink-soft); font-family:'Nunito'}
.plan ul{list-style:none; padding:0; margin:16px 0 24px}
.plan li{padding:6px 0; font-weight:600}
.plan li::before{content:"✓ "; color:var(--ok); font-weight:900}
.faq{max-width:760px; margin:0 auto}
.faq details{background:#fff; border:1px solid var(--line); border-radius:14px; padding:16px 20px; margin-bottom:12px; box-shadow:var(--shadow)}
.faq summary{font-weight:800; cursor:pointer; font-size:1.03rem}
.faq p{color:var(--ink-soft); margin:10px 0 0}
footer.site{background:var(--teal-dark); color:#DCEEEE; padding:44px 0 30px; margin-top:0}
footer.site .logo{color:#fff}
footer.site p{opacity:.85; max-width:34rem}
.video-band{display:grid; grid-template-columns:1fr 1fr; gap:30px; align-items:center}
@media(max-width:860px){ .video-band{grid-template-columns:1fr} }
.video-frame{border-radius:22px; overflow:hidden; box-shadow:var(--shadow-lg); position:relative}
.video-frame img{width:100%}
.video-frame .play-badge{position:absolute; inset:0; display:flex; align-items:center; justify-content:center; font-size:4rem; color:#fff; text-shadow:0 4px 24px rgba(0,0,0,.5)}

/* ---------- Auth ---------- */
.auth-wrap{min-height:100dvh; background:linear-gradient(160deg,var(--cream),#EAF6F6); display:flex; align-items:center; justify-content:center; padding:24px 16px}
.auth-card{background:#fff; border-radius:24px; box-shadow:var(--shadow-lg); padding:34px 30px; width:100%; max-width:420px}
.auth-card h1{font-size:1.8rem; margin-bottom:6px}
.auth-card p{color:var(--ink-soft)}
.field{margin:16px 0}
.field label{display:block; font-weight:800; margin-bottom:6px; font-size:.92rem}
.field input{width:100%; padding:14px 16px; border:2px solid var(--line); border-radius:14px; font-size:1rem; font-family:inherit}
.field input:focus{outline:none; border-color:var(--teal)}
.form-error{background:var(--bad-bg); color:var(--bad); border-radius:12px; padding:10px 14px; font-weight:700; margin:12px 0; display:none}
.demo-box{background:var(--teal-soft); border-radius:14px; padding:14px 16px; margin-top:18px; font-size:.92rem}
.demo-box b{color:var(--teal-dark)}

/* ---------- App del estudiante ---------- */
body.app-mode{background:var(--cream)}
.app-shell{max-width:860px; margin:0 auto; padding:20px 16px 108px}
.app-top{display:flex; align-items:center; justify-content:space-between; gap:12px; margin-bottom:18px}
.app-top .who{display:flex; align-items:center; gap:12px}
.avatar{width:48px; height:48px; border-radius:50%; background:var(--teal); color:#fff; display:flex; align-items:center; justify-content:center;
  font-family:'Baloo 2'; font-weight:800; font-size:1.25rem; box-shadow:var(--shadow)}
.app-top h2{font-size:1.35rem}
.app-top .sub{color:var(--ink-soft); font-size:.9rem; font-weight:600}
.pills{display:flex; gap:8px; flex-wrap:wrap}
.pill{background:#fff; border:1px solid var(--line); border-radius:999px; padding:7px 13px; font-weight:800; box-shadow:var(--shadow); font-size:.9rem}
.card{background:#fff; border-radius:var(--radius); box-shadow:var(--shadow); padding:22px; margin-bottom:18px; border:1px solid #FBF3E6}
.card h3{font-size:1.25rem; margin-bottom:6px}
.xpbar{height:14px; background:#F1E7D7; border-radius:999px; overflow:hidden; margin:10px 0 6px}
.xpbar>div{height:100%; background:linear-gradient(90deg,var(--teal),#25A5B1); border-radius:999px; transition:width .6s ease}
.daily{border:2px solid var(--gold); background:linear-gradient(150deg,#FFF8E6,#fff)}
.mission-card{display:flex; gap:16px; align-items:center; background:#fff; border:1px solid #FBF3E6; border-radius:var(--radius);
  box-shadow:var(--shadow); padding:16px; margin-bottom:14px; text-align:left; width:100%; transition:transform .15s}
.mission-card:active{transform:scale(.98)}
.mission-card .m-emoji{font-size:2.4rem; width:64px; height:64px; border-radius:16px; display:flex; align-items:center; justify-content:center; flex:none}
.mission-card h4{font-size:1.12rem}
.mission-card p{margin:2px 0 0; color:var(--ink-soft); font-size:.9rem; font-weight:600}
.stars{color:var(--gold); font-size:1.05rem; letter-spacing:2px}
.stars .off{color:#E4D9C8}
.level-head{border-radius:var(--radius); color:#fff; padding:20px; margin:26px 0 14px; box-shadow:var(--shadow)}
.level-head h3{font-size:1.4rem}
.level-head p{margin:2px 0 0; opacity:.92; font-weight:600}
.bottomnav{position:fixed; left:0; right:0; bottom:0; z-index:60; background:rgba(255,255,255,.96); backdrop-filter:blur(10px);
  border-top:1px solid var(--line); display:flex; justify-content:space-around; padding:8px 4px calc(8px + env(safe-area-inset-bottom))}
.bottomnav a{display:flex; flex-direction:column; align-items:center; gap:2px; color:var(--ink-soft); font-size:.72rem; font-weight:800; padding:4px 8px; border-radius:12px}
.bottomnav a .bi{font-size:1.35rem}
.bottomnav a.active{color:var(--teal-dark)}
.grid2{display:grid; grid-template-columns:1fr 1fr; gap:14px}
@media(max-width:560px){ .grid2{grid-template-columns:1fr} }
.tool-card{background:#fff; border:1px solid #FBF3E6; border-radius:var(--radius); box-shadow:var(--shadow); padding:20px; display:block; color:var(--ink)}
.tool-card .ico{font-size:2rem}
.tool-card h4{margin:8px 0 4px; font-size:1.15rem}
.tool-card p{margin:0; color:var(--ink-soft); font-weight:600; font-size:.92rem}

/* ---------- Reproductor de lecciones ---------- */
.player{max-width:720px; margin:0 auto; padding:18px 16px 60px}
.player-top{display:flex; align-items:center; gap:14px; margin-bottom:8px}
.player-top .back{font-size:1.5rem; background:#fff; border:1px solid var(--line); width:44px; height:44px; border-radius:50%; box-shadow:var(--shadow)}
.progress{height:12px; background:#F1E7D7; border-radius:999px; overflow:hidden; flex:1}
.progress>div{height:100%; background:var(--coral); border-radius:999px; transition:width .4s ease}
.act-head{margin:18px 0 14px}
.act-head .skill{font-size:.8rem}
.act-title{font-size:1.5rem; margin:6px 0 4px}
.act-inst{color:var(--ink-soft); font-weight:600}
.act-card{background:#fff; border-radius:22px; box-shadow:var(--shadow); padding:24px 20px; border:1px solid #FBF3E6; animation:fadeUp .35s ease}
@keyframes fadeUp{from{opacity:0; transform:translateY(10px)} to{opacity:1; transform:none}}
.opt{display:block; width:100%; text-align:left; background:#FFFCF7; border:2px solid var(--line); border-radius:16px;
  padding:16px 18px; margin:10px 0; font-size:1.05rem; font-weight:700; transition:all .15s; min-height:56px}
.opt:hover{border-color:var(--teal)}
.opt.sel{border-color:var(--teal); background:var(--teal-soft)}
.opt.good{border-color:var(--ok); background:var(--ok-bg)}
.opt.bad{border-color:var(--bad); background:var(--bad-bg)}
.opt[disabled]{cursor:default}
.feedback{border-radius:16px; padding:16px 18px; margin-top:16px; font-weight:700; animation:fadeUp .3s ease}
.feedback.good{background:var(--ok-bg); color:#1E6B33}
.feedback.bad{background:var(--bad-bg); color:#8F2626}
.feedback .why{font-weight:600; margin-top:4px}
.big-audio{display:flex; align-items:center; gap:14px; background:var(--teal-soft); border-radius:18px; padding:18px; margin:14px 0}
.big-audio button{width:64px; height:64px; border-radius:50%; border:none; background:var(--teal); color:#fff; font-size:1.7rem; flex:none; box-shadow:var(--shadow)}
.chat{display:flex; flex-direction:column; gap:12px; margin:14px 0}
.bubble{max-width:85%; padding:13px 17px; border-radius:20px; font-size:1.05rem; animation:fadeUp .3s ease}
.bubble.npc{background:#EFF6F6; border-bottom-left-radius:6px; align-self:flex-start}
.bubble.me{background:var(--teal); color:#fff; border-bottom-right-radius:6px; align-self:flex-end}
.bubble .who{font-size:.75rem; font-weight:800; opacity:.65; display:block; margin-bottom:2px}
.tokens{display:flex; flex-wrap:wrap; gap:10px; margin:14px 0}
.token{border:2px solid var(--teal); color:var(--teal-dark); background:#fff; border-radius:999px; padding:11px 18px; font-weight:800; font-size:1.02rem; min-height:48px}
.token.used{opacity:.25; pointer-events:none}
.answer-line{min-height:58px; border:2px dashed #D8C9AE; border-radius:16px; padding:10px 14px; display:flex; flex-wrap:wrap; gap:8px; align-items:center; background:#FFFCF7}
.answer-line .token{border-style:solid}
.match-grid{display:grid; grid-template-columns:1fr 1fr; gap:12px; margin-top:12px}
.match-col{display:flex; flex-direction:column; gap:10px}
.txt-input{width:100%; padding:15px 17px; border:2px solid var(--line); border-radius:14px; font-size:1.05rem; font-family:inherit; background:#FFFCF7}
.txt-input:focus{outline:none; border-color:var(--teal)}
textarea.txt-input{min-height:120px; resize:vertical}
.reading p.en{font-size:1.12rem; margin:0 0 4px}
.reading p.es{color:var(--ink-soft); margin:0 0 16px; font-size:.98rem}
.sentence-big{font-size:1.3rem; font-weight:700; text-align:center; padding:18px 10px; font-family:'Baloo 2'}
.wrong-line{background:var(--bad-bg); border-radius:14px; padding:14px 18px; font-weight:700; text-align:center; margin:10px 0}
.kw-check{list-style:none; padding:0; margin:10px 0}
.kw-check li{padding:5px 0; font-weight:700; color:var(--ink-soft)}
.kw-check li.hit{color:var(--ok)}
.results{text-align:center; padding:30px 10px}
.results .big-stars{font-size:3rem; letter-spacing:6px}
.results .xp-gain{font-family:'Baloo 2'; font-size:2rem; color:var(--teal-dark); font-weight:800}

/* ---------- Video interactivo ---------- */
.video-wrap{position:relative; border-radius:22px; overflow:hidden; box-shadow:var(--shadow-lg); background:#000}
.video-wrap video{width:100%; display:block}
.video-overlay{position:absolute; inset:0; background:rgba(20,32,38,.55); backdrop-filter:blur(2px);
  display:flex; align-items:flex-end; justify-content:center; padding:16px; opacity:0; pointer-events:none; transition:opacity .35s ease}
.video-overlay.show{opacity:1; pointer-events:auto}
.video-overlay .panel{background:#fff; border-radius:20px; padding:20px; width:100%; max-width:520px; transform:translateY(16px); transition:transform .35s ease; max-height:88%; overflow:auto}
.video-overlay.show .panel{transform:none}
.video-overlay .panel h3{font-size:1.15rem; margin-bottom:8px}
.hotspot{position:absolute; border:3px dashed rgba(255,255,255,.0); border-radius:16px; background:transparent; transition:border-color .2s, background .2s}
.hotspot-area .hotspot{border-color:rgba(255,255,255,.35)}
.hotspot:active{background:rgba(255,255,255,.15)}
.sub-line{text-align:center; margin-top:14px; font-size:1.05rem}
.sub-line .en{font-weight:800; font-family:'Baloo 2'; font-size:1.2rem}
.sub-line .es{color:var(--ink-soft); font-weight:600}

/* ---------- Vocab / gramática / lectores / examen ---------- */
.flashcard{background:#fff; border-radius:24px; box-shadow:var(--shadow-lg); padding:38px 26px; text-align:center; border:1px solid #FBF3E6; min-height:250px;
  display:flex; flex-direction:column; justify-content:center; gap:8px; cursor:pointer; animation:fadeUp .3s ease}
.flashcard .word{font-family:'Baloo 2'; font-size:2.4rem; font-weight:800; color:var(--teal-dark)}
.flashcard .ex{color:var(--ink-soft); font-style:italic}
.grade-row{display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin-top:18px}
.grade-row button{border:none; border-radius:14px; padding:14px 6px; font-weight:800; font-size:.92rem; min-height:56px}
.g-again{background:var(--bad-bg); color:var(--bad)} .g-hard{background:#FFF0D6; color:#92690E}
.g-good{background:var(--ok-bg); color:#1E6B33} .g-easy{background:var(--teal-soft); color:var(--teal-dark)}
.list-row{display:flex; gap:14px; align-items:center; background:#fff; border:1px solid #FBF3E6; border-radius:16px; box-shadow:var(--shadow); padding:16px 18px; margin-bottom:12px; width:100%; text-align:left}
.list-row h4{font-size:1.08rem}
.list-row p{margin:2px 0 0; color:var(--ink-soft); font-weight:600; font-size:.9rem}
.grammar-body{background:#fff; border-radius:22px; box-shadow:var(--shadow); padding:26px 22px; border:1px solid #FBF3E6}
.grammar-body .rule{background:var(--teal-soft); border-radius:14px; padding:16px 18px; font-weight:700; margin:14px 0}
.ex-row{display:flex; justify-content:space-between; gap:12px; padding:10px 0; border-bottom:1px dashed var(--line)}
.ex-row:last-child{border:none}
.mistake-box{background:var(--coral-soft); border-radius:14px; padding:16px 18px; margin:14px 0}
.cert{border:6px double var(--teal); border-radius:12px; padding:44px 30px; text-align:center; background:#fff; max-width:720px; margin:26px auto}
.cert h1{font-size:2.2rem; color:var(--teal-dark)}
.cert .name{font-family:'Baloo 2'; font-size:2rem; border-bottom:2px solid var(--gold); display:inline-block; padding:0 22px; margin:14px 0}
@media print{ .no-print{display:none !important} body{background:#fff} .app-shell{padding:0} }

/* ---------- Toast ---------- */
.toast{position:fixed; left:50%; bottom:96px; transform:translateX(-50%) translateY(20px); background:var(--ink); color:#fff;
  padding:13px 22px; border-radius:999px; font-weight:800; opacity:0; transition:all .3s ease; z-index:99; box-shadow:var(--shadow-lg); max-width:90vw; text-align:center}
.toast.show{opacity:1; transform:translateX(-50%)}
.center{text-align:center} .muted{color:var(--ink-soft)} .mt{margin-top:16px} .mb{margin-bottom:16px}
.loading{padding:70px 20px; text-align:center; color:var(--ink-soft); font-weight:700}
.spinner{width:44px; height:44px; border:5px solid var(--teal-soft); border-top-color:var(--teal); border-radius:50%; margin:0 auto 14px; animation:spin 0.9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}