:root{
  --bg:#ffffff;
  --bg-soft:#F2F4F1;
  --bg-warm:#FBF7F0;
  --ink:#1D1D1F;
  --ink-soft:#5B5F5A;
  --accent:#1F5D50;
  --accent-dark:#153F37;
  --accent-2:#E6A14A;
  --line:#DDE1DC;
  --error:#C1443C;
  --error-soft:#F8E9E8;
  --correct-soft:#E4EFEC;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --serif: "Iowan Old Style", "Palatino Linotype", Georgia, serif;
  --mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

*{box-sizing:border-box;}

body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}

a{color:inherit;}

/* ---------- advertising spaces ---------- */

.ad-slot{
  color:#8B908A;
  background:#F8F9F7;
  border:1px dashed #CDD2CC;
  font-size:11px;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.ad-slot span{display:block;text-align:center;}

.ad-slot-banner{
  max-width:884px;
  min-height:90px;
  margin:0 auto 40px;
  display:grid;
  place-items:center;
}

/* ---------- header ---------- */

header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:22px 48px;
  border-bottom:1px solid var(--line);
}

.wordmark{
  font-family:var(--serif);
  font-size:21px;
  font-weight:600;
}

.wordmark--animated{
  position:relative;
  color:var(--accent-dark);
}

.wordmark--animated span{
  display:inline-block;
  animation:wordmark-arrival .7s cubic-bezier(.2,.8,.2,1) both;
}

.wordmark--animated::after{
  content:"";
  position:absolute;
  right:0;
  bottom:-5px;
  left:0;
  height:2px;
  border-radius:999px;
  background:var(--accent-2);
  transform:scaleX(0);
  transform-origin:left;
  animation:wordmark-underline .8s .35s cubic-bezier(.2,.8,.2,1) both;
}

@keyframes wordmark-arrival{
  from{opacity:0;transform:translateY(-9px) rotate(-2deg);}
  65%{opacity:1;transform:translateY(2px) rotate(.5deg);}
  to{opacity:1;transform:translateY(0) rotate(0);}
}

@keyframes wordmark-underline{
  to{transform:scaleX(1);}
}

nav a{
  text-decoration:none;
  font-size:14px;
  color:var(--ink-soft);
  margin-left:28px;
}

nav a:hover{color:var(--ink);}

.nav-cta{
  background:var(--accent);
  color:#fff !important;
  padding:9px 18px;
  border-radius:8px;
}

/* ---------- hero ---------- */

.hero{
  padding:72px 48px 24px;
  max-width:980px;
  margin:0 auto;
}

.hero h1{
  font-family:var(--serif);
  font-size:44px;
  line-height:1.15;
  font-weight:600;
  letter-spacing:-0.01em;
  margin:0 0 18px;
  max-width:680px;
}

.hero h1 em{
  font-style:italic;
  color:var(--accent);
}

.hero .sub{
  font-size:18px;
  color:var(--ink-soft);
  max-width:520px;
  margin:0 0 36px;
  line-height:1.6;
}

/* ---------- typing tool ---------- */

.tool-card{
  max-width:980px;
  margin:0 auto 96px;
  padding:0 48px;
}

.mode-bar{
  display:inline-flex;
  background:var(--bg-soft);
  border-radius:10px;
  padding:4px;
  margin-bottom:24px;
}

.mode-btn{
  border:none;
  background:transparent;
  font-family:var(--sans);
  font-size:14px;
  color:var(--ink-soft);
  padding:9px 18px;
  border-radius:7px;
  cursor:pointer;
}

.mode-btn.active{
  background:var(--bg);
  color:var(--accent-dark);
  font-weight:600;
  box-shadow:0 1px 3px rgba(0,0,0,0.10);
}

.own-text-panel{display:none;margin-bottom:20px;}
.own-text-panel.visible{display:block;}

.sample-text-panel{display:none;margin-bottom:20px;}
.sample-text-panel.visible{display:flex;align-items:center;gap:12px;}
.letter-drill-panel{display:none;margin-bottom:20px;}
.letter-drill-panel.visible{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:18px;
  text-align:center;
}
.sample-text-panel label,.letter-drill-panel label{font-size:14px;color:var(--ink-soft);}
.sample-text-panel select,.letter-drill-panel select{
  font-family:var(--sans);
  font-size:14px;
  color:var(--ink);
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:7px;
  padding:8px 34px 8px 10px;
  cursor:pointer;
}

.keyboard-guide{
  width:100%;
  max-width:470px;
  padding:14px 16px;
  background:var(--bg-soft);
  border-radius:10px;
}

.keyboard-guide p{
  margin:0 0 16px;
  font-size:13px;
  color:var(--ink-soft);
}

.keyboard-rows{display:grid;gap:5px;}
.keyboard-row{display:flex;gap:4px;transition:opacity .2s ease;opacity:.42;}
.keyboard-row span{
  display:grid;
  place-items:center;
  width:28px;
  height:27px;
  color:var(--ink-soft);
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:4px;
  font-family:var(--mono);
  font-size:12px;
  font-weight:600;
}
.keyboard-row-offset{margin-left:14px;}
.keyboard-row-offset-large{margin-left:28px;}
.keyboard-row.highlighted{opacity:1;}
.keyboard-row.highlighted span{color:#75450E;background:#FFF4E3;border-color:var(--accent-2);box-shadow:0 1px 0 rgba(148,90,18,.12);}

.own-text-panel textarea{
  width:100%;
  min-height:80px;
  font-family:var(--sans);
  font-size:14px;
  border:1px solid var(--line);
  border-radius:8px;
  padding:12px 14px;
  resize:vertical;
}

.own-text-panel button{
  margin-top:10px;
  font-family:var(--sans);
  font-size:14px;
  border:none;
  background:var(--accent);
  color:#fff;
  padding:9px 18px;
  border-radius:7px;
  cursor:pointer;
}

.type-box{
  background:var(--bg-warm);
  border:1px solid var(--line);
  border-radius:16px;
  padding:36px;
  font-family:var(--mono);
  font-size:22px;
  line-height:1.7;
  letter-spacing:0.01em;
  min-height:110px;
  max-height:190px;
  overflow-y:auto;
}

.type-box:focus-within{border-color:var(--accent);}

.type-box span{color:#9a9d97;}
.type-box span.correct{color:var(--ink);background:var(--correct-soft);}
.type-box span.incorrect{color:var(--error);background:var(--error-soft);}
.type-box span.current{border-bottom:2px solid var(--accent-2);background:#FFF4E3;}

.hidden-input{position:absolute;opacity:0;pointer-events:none;}

.controls{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-top:20px;
}

.stats-row{
  display:flex;
  gap:28px;
  font-family:var(--mono);
  font-size:13px;
  color:var(--ink-soft);
}

.stats-row strong{color:var(--ink);font-weight:600;}

.reset-btn{
  font-family:var(--sans);
  font-size:14px;
  color:var(--ink-soft);
  background:none;
  border:1px solid var(--line);
  border-radius:7px;
  padding:8px 16px;
  cursor:pointer;
}

.reset-btn:hover{color:var(--ink);border-color:var(--ink-soft);}

/* ---------- benefits ---------- */

.benefits{
  background:var(--bg-soft);
  padding:88px 48px;
}

.benefits-inner{max-width:980px;margin:0 auto;}

.section-heading{
  font-family:var(--serif);
  font-size:30px;
  font-weight:600;
  margin:0 0 14px;
  max-width:520px;
}

.section-intro{
  font-size:16px;
  color:var(--ink-soft);
  max-width:560px;
  line-height:1.65;
  margin:0 0 48px;
}

.benefit-list{
  display:grid;
  grid-template-columns:repeat(2, 1fr);
  gap:36px 48px;
}

.benefit-item{
  display:flex;
  gap:16px;
}

.benefit-icon{
  flex:none;
  width:38px;
  height:38px;
  color:var(--accent);
}

.benefit-item h3{
  font-size:16px;
  font-weight:600;
  margin:2px 0 6px;
}

.benefit-item p{
  font-size:14px;
  color:var(--ink-soft);
  line-height:1.6;
  margin:0;
}

/* ---------- method ---------- */

.method{
  padding:88px 48px 100px;
  max-width:980px;
  margin:0 auto;
}

.method-steps{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:32px;
  margin-top:16px;
}

.method-step{
  border-top:2px solid var(--accent-2);
  padding-top:18px;
}

.method-step .step-number{
  font-family:var(--serif);
  font-style:italic;
  font-size:32px;
  color:var(--accent-2);
  display:block;
  margin-bottom:10px;
}

.method-step h3{
  font-size:17px;
  font-weight:600;
  margin:0 0 8px;
}

.method-step p{
  font-size:14.5px;
  color:var(--ink-soft);
  line-height:1.65;
  margin:0;
}

.method-reading{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:16px;
  margin-top:42px;
}

.method-reading a{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:16px 18px;
  border:1px solid var(--accent);
  border-radius:10px;
  background:var(--bg-warm);
  color:var(--accent-dark);
  font-size:14px;
  font-weight:600;
  line-height:1.45;
  text-decoration:none;
  transition:background .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.method-reading a::after{
  content:"Leer artículo";
  flex:none;
  font-size:12px;
  text-decoration:underline;
  text-underline-offset:3px;
  white-space:nowrap;
}

.method-reading a:hover{
  background:var(--accent);
  color:#fff;
  box-shadow:0 5px 14px rgba(21,63,55,.16);
  transform:translateY(-2px);
}

.method-reading a:focus-visible{
  outline:3px solid var(--accent-2);
  outline-offset:3px;
}

/* ---------- footer ---------- */

footer{
  border-top:1px solid var(--line);
  padding:28px 48px;
  font-size:13px;
  color:var(--ink-soft);
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
}

/* ---------- responsive ---------- */

@media (max-width:760px){
  header{padding:16px 20px;}
  nav a{margin-left:16px;}
  .hero{padding:48px 20px 16px;}
  .hero h1{font-size:30px;}
  .tool-card{padding:0 20px;}
  .sample-text-panel.visible{align-items:flex-start;flex-direction:column;gap:6px;}
  .letter-drill-panel.visible{align-items:center;gap:18px;}
  .keyboard-guide{max-width:100%;}
  .ad-slot-banner{min-height:70px;margin:0 20px 32px;}
  .type-box{font-size:17px;padding:22px;max-height:131px;}
  .benefits{padding:56px 20px;}
  .benefit-list{grid-template-columns:1fr;}
  .method{padding:56px 20px 64px;}
  .method-steps{grid-template-columns:1fr;gap:28px;}
  .method-reading{grid-template-columns:1fr;gap:14px;margin-top:32px;}
  footer{flex-direction:column;gap:8px;padding:20px;}
}

@media (prefers-reduced-motion:reduce){
  .wordmark--animated span,.wordmark--animated::after{animation:none;}
  .wordmark--animated::after{transform:scaleX(1);}
}