:root{
  --bg:#F5F9FA;
  --bg-alt:#EAF1F3;
  --card:#FFFFFF;
  --card-border:#D7E2E6;
  --text:#12233F;
  --text-dim:#52667A;
  --red:#123C6B;
  --red-dim:#0B2748;
  --gold:#2FE0B0;
  --gold-soft:#7CF2D3;
  --max-w:1200px;
  --radius:14px;
}

*{margin:0;padding:0;box-sizing:border-box;}

html{scroll-behavior:smooth;overflow-x:hidden;max-width:100%;}

::selection{background:var(--gold);color:#1a1a1a;}

::-webkit-scrollbar{width:10px;}
::-webkit-scrollbar-track{background:var(--bg);}
::-webkit-scrollbar-thumb{background:linear-gradient(var(--gold), var(--red));border-radius:10px;}

body{
  background:var(--bg);
  color:var(--text);
  font-family:'Inter', sans-serif;
  line-height:1.6;
  overflow-x:hidden;
}

h1,h2,h3,.brand{
  font-family:'Fraunces', serif;
  font-weight:700;
  letter-spacing:-0.01em;
}

a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}

.container{
  max-width:var(--max-w);
  margin:0 auto;
  padding:0 24px;
}

.flag-bar{
  height:4px;
  width:100%;
  background:linear-gradient(90deg, #111 0 33%, #C8102E 33% 66%, #FFCC00 66% 100%);
}

/* ---------- NAV ---------- */
header{
  position:fixed;
  top:0;left:0;right:0;
  z-index:100;
  background:rgba(245,249,250,0.94);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(47,224,176,0.15);
  box-shadow:0 2px 20px rgba(18,35,63,0.06);
  transition:background .3s ease, box-shadow .3s ease, border-color .3s ease;
}
header.scrolled{
  background:rgba(245,249,250,0.92);
  box-shadow:0 8px 30px rgba(18,35,63,0.08);
  border-bottom-color:rgba(47,224,176,0.25);
}
header nav{
  max-width:var(--max-w);
  margin:0 auto;
  padding:16px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.brand{
  font-family:'Yellowtail', cursive;
  font-weight:400;
  font-size:1.7rem;
  display:flex;
  align-items:center;
  gap:8px;
  color:var(--red);
}
.brand .dot{color:var(--gold);font-family:'Inter',sans-serif;}
.nav-links{
  display:flex;
  gap:18px;
  list-style:none;
}
.nav-links a{
  font-size:0.84rem;
  font-weight:500;
  color:var(--text-dim);
  transition:color .25s ease;
  position:relative;
}
.nav-links a:hover{color:var(--text);}
.nav-links a::after{
  content:'';
  position:absolute;
  left:0;bottom:-6px;
  width:0;height:2px;
  background:var(--gold);
  transition:width .25s ease;
}
.nav-links a:hover::after{width:100%;}
.nav-links a.active{color:var(--text);}
.nav-links a.active::after{width:100%;}
.nav-cta{
  background:linear-gradient(135deg, var(--gold), var(--gold-soft));
  color:var(--red-dim);
  padding:10px 20px;
  border-radius:999px;
  font-size:0.88rem;
  font-weight:700;
  white-space:nowrap;
  box-shadow:0 4px 18px rgba(47,224,176,0.35);
  transition:transform .25s ease, box-shadow .25s ease;
}
.nav-cta:hover{transform:translateY(-2px);box-shadow:0 6px 22px rgba(47,224,176,0.5);}
.nav-cta:active,.btn:active{transform:scale(0.97);}
.nav-toggle{display:none;background:none;border:none;color:var(--text);font-size:1.6rem;line-height:1;cursor:pointer;padding:12px;margin:-12px;}

@media (max-width:1080px){
  .nav-links{
    position:fixed;
    top:64px;left:0;right:0;
    background:rgba(245,249,250,0.97);
    flex-direction:column;
    gap:0;
    padding:0;
    max-height:0;
    overflow:hidden;
    transition:max-height .35s ease;
    border-bottom:1px solid rgba(47,224,176,0.2);
  }
  .nav-links.open{max-height:420px;padding:12px 0;overflow-y:auto;}
  .nav-links a{padding:14px 24px;display:block;}
  .nav-links a::after{display:none;}
  .nav-toggle{display:block;}
  .nav-cta{display:none;}
}

/* ---------- HERO ---------- */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;
  align-items:center;
  padding:140px 0 80px;
  overflow:hidden;
  isolation:isolate;
  background:linear-gradient(160deg, #0E1D35 0%, #12294A 55%, #163B5E 100%);
}
.hero-bg{
  position:absolute;inset:0;
  z-index:-2;
  background:
    radial-gradient(ellipse 55% 45% at 88% 12%, rgba(47,224,176,0.16), transparent 60%),
    radial-gradient(ellipse 60% 50% at 8% 92%, rgba(47,224,176,0.09), transparent 55%);
}
.hero-bg::before,
.hero-bg::after{
  content:'';
  position:absolute;
  border-radius:50%;
  filter:blur(70px);
  opacity:0.55;
  animation:orbFloat 16s ease-in-out infinite;
}
.hero-bg::before{
  width:320px;height:320px;
  top:-60px;right:14%;
  background:radial-gradient(circle, rgba(47,224,176,0.4), transparent 72%);
}
.hero-bg::after{
  width:260px;height:260px;
  bottom:-40px;left:8%;
  background:radial-gradient(circle, rgba(124,242,211,0.25), transparent 72%);
  animation-duration:20s;
  animation-delay:-8s;
}
@keyframes orbFloat{
  0%,100%{transform:translate(0,0) scale(1);}
  50%{transform:translate(-26px,24px) scale(1.1);}
}
@media (prefers-reduced-motion: reduce){
  .hero-bg::before,.hero-bg::after{animation:none;}
}
.hero-stripes{
  position:absolute;
  right:-10%;top:0;bottom:0;
  width:60%;
  z-index:-1;
  opacity:0.5;
  background:repeating-linear-gradient(
    115deg,
    transparent 0 40px,
    rgba(255,255,255,0.045) 40px 42px
  );
}
.hero .kicker{
  color:var(--gold-soft);
  background:rgba(47,224,176,0.14);
  border-color:rgba(47,224,176,0.4);
}
.hero h1{color:#fff;}
.hero p.lead{color:rgba(255,255,255,0.72) !important;}
.hero-badges .badge{color:rgba(255,255,255,0.6);}
.hero-badges .badge b{color:#fff;}
.hero-inner{
  display:grid;
  grid-template-columns:1.15fr 0.85fr;
  gap:56px;
  align-items:center;
}
.kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:0.78rem;
  letter-spacing:0.12em;
  text-transform:uppercase;
  font-weight:700;
  color:var(--gold-soft);
  background:var(--red);
  border:1px solid var(--red-dim);
  padding:7px 14px;
  border-radius:999px;
  margin-bottom:24px;
}
.hero h1{
  font-size:clamp(2.4rem, 5.2vw, 4.2rem);
  line-height:1.05;
  margin-bottom:22px;
}
.hero h1 em{
  font-style:italic;
  background:linear-gradient(100deg, var(--gold), var(--gold-soft));
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero p.lead{
  font-size:1.15rem;
  color:var(--text-dim);
  max-width:520px;
  margin-bottom:36px;
}
.cta-row{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:44px;
}
.btn{
  position:relative;
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:15px 28px;
  border-radius:999px;
  font-weight:600;
  font-size:0.98rem;
  transition:transform .25s ease, box-shadow .25s ease, background .25s ease;
  cursor:pointer;
  border:none;
  overflow:hidden;
}
.btn-primary{
  background:linear-gradient(135deg, var(--gold), var(--gold-soft));
  color:var(--red-dim);
  box-shadow:0 8px 26px rgba(47,224,176,0.35);
}
.btn-primary::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(115deg, transparent 30%, rgba(255,255,255,0.55) 50%, transparent 70%);
  transform:translateX(-120%);
  transition:transform .6s ease;
  pointer-events:none;
}
.btn-primary:hover::before{transform:translateX(120%);}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(47,224,176,0.5);}
.btn-outline{
  background:transparent;
  color:var(--text);
  border:1.5px solid rgba(124,242,211,0.5);
}
.btn-outline:hover{background:rgba(124,242,211,0.1);border-color:var(--gold);transform:translateY(-3px);}
.hero .btn-outline{color:#fff;border-color:rgba(255,255,255,0.35);}
.hero .btn-outline:hover{background:rgba(255,255,255,0.1);border-color:#fff;}

.hero-badges{
  display:flex;
  gap:28px;
  flex-wrap:wrap;
}
.badge{
  font-size:0.85rem;
  color:var(--text-dim);
}
.badge b{
  display:block;
  font-family:'Fraunces', serif;
  font-size:1.5rem;
  color:var(--text);
}

/* hero photo */
.hero-photo{
  position:relative;
  max-width:420px;
  margin:0 auto;
  animation:photoFloat 6s ease-in-out infinite;
}
@keyframes photoFloat{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-12px);}
}
@media (prefers-reduced-motion: reduce){
  .hero-photo{animation:none;}
}
.hero-photo::before{
  content:'';
  position:absolute;
  inset:-14px;
  border-radius:28px;
  background:linear-gradient(145deg, var(--gold-soft), var(--gold));
  z-index:-1;
  opacity:0.85;
}
.hero-photo img{
  width:100%;
  height:auto;
  aspect-ratio:4/5;
  object-fit:cover;
  object-position:center 62%;
  display:block;
  border-radius:22px;
  box-shadow:0 24px 60px rgba(18,35,63,0.25);
  transition:transform .5s cubic-bezier(.16,.84,.44,1);
}
.hero-photo:hover img{transform:scale(1.025);}
.hero-photo-badge{
  position:absolute;
  left:-24px;bottom:24px;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:14px;
  padding:14px 18px;
  box-shadow:0 12px 30px rgba(18,35,63,0.18);
  display:flex;
  align-items:center;
  gap:10px;
}
.hero-photo-badge .icon{
  width:34px;height:34px;
  border-radius:50%;
  background:linear-gradient(135deg, var(--red), var(--gold));
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:1rem;
  flex-shrink:0;
}
.hero-photo-badge b{
  display:block;
  font-family:'Fraunces', serif;
  font-size:1.1rem;
  color:var(--text);
  line-height:1.1;
}
.hero-photo-badge-top{
  left:auto;
  right:-20px;
  bottom:auto;
  top:20px;
}
@media (max-width:480px){
  .hero-photo-badge-top{display:none;}
}
.hero-photo-badge span{
  font-size:0.72rem;
  color:var(--text-dim);
}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;}
  .hero-photo{order:-1;max-width:280px;}
}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
}

/* ---------- SECTION GENERIC ---------- */
section{
  padding:120px 0;
  position:relative;
}
.section-head{
  max-width:640px;
  margin:0 auto 64px;
  text-align:center;
}
.section-head .kicker{margin-bottom:18px;}
.section-head h2{
  font-size:clamp(1.9rem, 3.6vw, 2.8rem);
  margin-bottom:16px;
}
.section-head p{
  color:var(--text-dim);
  font-size:1.05rem;
}

.scroll-progress{
  position:fixed;
  top:0;left:0;
  height:3px;
  width:0%;
  background:linear-gradient(90deg, var(--gold), var(--red));
  z-index:200;
}

.reveal{
  opacity:0;
  transform:translateY(44px) scale(0.98);
  filter:blur(3px);
  transition:opacity .8s cubic-bezier(.16,.84,.44,1), transform .8s cubic-bezier(.16,.84,.44,1), filter .8s ease;
}
.reveal.visible{opacity:1;transform:translateY(0) scale(1);filter:blur(0);}
.reveal-scale{
  opacity:0;
  transform:scale(0.85) translateY(24px);
  transition:opacity .8s ease, transform .8s cubic-bezier(.16,.84,.44,1);
}
.reveal-scale.visible{opacity:1;transform:scale(1) translateY(0);}

@media (prefers-reduced-motion: reduce){
  .reveal, .reveal-scale{opacity:1;transform:none;transition:none;}
}

/* ---------- SOBRE MI ---------- */
.about{
  background:var(--bg-alt);
}
.about-grid{
  display:grid;
  grid-template-columns:0.62fr 1.38fr;
  gap:48px;
  align-items:center;
}
.about-photo-wrap{
  display:flex;
  justify-content:center;
}
.about-photo{
  position:relative;
  width:100%;
  max-width:320px;
}
.about-photo::before{
  content:'';
  position:absolute;
  inset:-10px;
  border-radius:24px;
  background:linear-gradient(145deg, var(--gold-soft), var(--gold));
  z-index:-1;
  opacity:0.85;
}
.about-photo img{
  width:100%;
  height:auto;
  aspect-ratio:4/3;
  object-fit:cover;
  object-position:center 45%;
  display:block;
  border-radius:18px;
  box-shadow:0 14px 34px rgba(18,60,107,0.18);
}
.about-text h2{
  font-size:1.6rem;
  margin-bottom:18px;
}
.about-text p{
  color:var(--text-dim);
  margin-bottom:16px;
}
.stats-row{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
  margin-top:36px;
}
.about-grid > *,
.stats-row > *{
  min-width:0;
}
.stat{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:22px 16px;
  text-align:center;
}
.stat .num{
  font-family:'Fraunces', serif;
  font-size:2.1rem;
  font-weight:700;
  background:linear-gradient(100deg, var(--gold), var(--red));
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.stat .label{
  font-size:0.82rem;
  color:var(--text-dim);
  margin-top:4px;
}

@media (max-width:900px){
  .about-grid{grid-template-columns:1fr;}
  .stats-row{grid-template-columns:1fr 1fr 1fr;gap:12px;}
  .stat{padding:16px 8px;}
  .stat .num{font-size:1.5rem;}
}

@media (max-width:420px){
  .stats-row{grid-template-columns:1fr;gap:10px;}
  .stat{padding:16px;}
}

/* ---------- LIBROS ---------- */
.criteria-row{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-bottom:64px;
}
.criteria-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:20px;
  font-size:0.88rem;
  color:var(--text-dim);
}
.criteria-card b{
  display:block;
  color:var(--text);
  font-family:'Fraunces', serif;
  font-size:1.05rem;
  margin-bottom:6px;
}

.books-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(300px, 1fr));
  gap:26px;
}
.book-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:28px;
  display:flex;
  flex-direction:column;
  transition:transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.book-card:hover{
  transform:translateY(-6px);
  border-color:rgba(124,242,211,0.5);
  box-shadow:0 16px 40px rgba(18,35,63,0.16);
}
.book-cover{
  position:relative;
  height:190px;
  border-radius:10px;
  margin-bottom:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  overflow:hidden;
  background:var(--bg-alt);
  box-shadow:inset 0 0 0 1px rgba(0,0,0,0.06);
}
.book-cover img{
  max-height:88%;
  max-width:80%;
  width:auto;
  object-fit:contain;
  border-radius:4px;
  box-shadow:0 10px 22px rgba(18,35,63,0.28);
  transition:transform .4s cubic-bezier(.16,.84,.44,1);
}
.book-card:hover .book-cover img{transform:scale(1.06);}
.book-top{
  display:flex;
  justify-content:space-between;
  align-items:flex-start;
  margin-bottom:14px;
}
.book-tag{
  font-size:0.72rem;
  text-transform:uppercase;
  letter-spacing:0.06em;
  color:var(--gold-soft);
  background:var(--red);
  border:1px solid var(--red-dim);
  padding:4px 10px;
  border-radius:999px;
}
.book-level{
  font-size:0.78rem;
  color:var(--text-dim);
  font-weight:600;
}
.book-badge{
  display:inline-block;
  font-size:0.72rem;
  color:var(--red);
  font-weight:700;
  letter-spacing:0.04em;
  text-transform:uppercase;
  margin-bottom:8px;
}
.book-card h3{
  font-size:1.2rem;
  margin-bottom:6px;
  line-height:1.3;
}
.book-editorial{
  font-size:0.85rem;
  color:var(--text-dim);
  margin-bottom:6px;
}
.book-lang{
  font-size:0.82rem;
  margin-bottom:14px;
}
.book-features{
  list-style:none;
  margin-bottom:16px;
  flex-grow:1;
}
.book-features li{
  font-size:0.88rem;
  color:var(--text-dim);
  padding-left:18px;
  position:relative;
  margin-bottom:8px;
}
.book-features li::before{
  content:'—';
  position:absolute;
  left:0;
  color:var(--gold);
}
.book-stars{
  color:var(--gold);
  letter-spacing:2px;
  margin-bottom:6px;
}
.book-why{
  font-size:0.82rem;
  color:var(--text-dim);
  font-style:italic;
  margin-bottom:18px;
}
.book-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  background:linear-gradient(135deg, var(--gold-soft), var(--gold));
  color:#1a1408;
  font-weight:700;
  font-size:0.9rem;
  padding:12px 20px;
  border-radius:999px;
  transition:transform .25s ease, box-shadow .25s ease;
}
.book-btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(124,242,211,0.35);}

.affiliate-note{
  max-width:640px;
  margin:48px auto 0;
  text-align:center;
  font-size:0.8rem;
  color:var(--text-dim);
  opacity:0.85;
}

@media (max-width:900px){
  .criteria-row{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  .criteria-row{grid-template-columns:1fr;}
}

/* ---------- COMUNIDAD ---------- */
.community{
  background:var(--bg-alt);
}
.community-grid{
  display:grid;
  grid-template-columns:repeat(3, 1fr);
  gap:26px;
}
.social-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:34px 28px;
  text-align:center;
  transition:transform .3s ease, border-color .3s ease;
}
.social-card:hover{
  transform:translateY(-6px);
  border-color:rgba(124,242,211,0.5);
}
.social-icon{
  width:56px;height:56px;
  margin:0 auto 18px;
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg, var(--red), var(--gold));
  color:#fff;
  font-size:1.4rem;
}
.social-card h3{font-size:1.15rem;margin-bottom:8px;}
.social-card p{color:var(--text-dim);font-size:0.9rem;margin-bottom:20px;}
.social-link{
  display:inline-block;
  font-weight:600;
  font-size:0.88rem;
  color:var(--gold);
  border-bottom:1px solid rgba(47,224,176,0.4);
  padding:12px 4px;
  margin:-12px -4px;
}

@media (max-width:860px){
  .community-grid{grid-template-columns:1fr;}
}

/* ---------- PROXIMAMENTE ---------- */
.soon{
  text-align:center;
}
.soon-box{
  position:relative;
  max-width:720px;
  margin:0 auto;
  background:linear-gradient(135deg, rgba(18,60,107,0.12), rgba(124,242,211,0.1));
  border:1px solid rgba(124,242,211,0.3);
  border-radius:20px;
  padding:56px 40px;
  overflow:hidden;
}
.soon-bg{
  position:absolute;inset:0;
  z-index:0;
}
.soon-bg img{
  width:100%;height:100%;
  object-fit:cover;
  opacity:0.16;
}
.soon-box > *:not(.soon-bg){
  position:relative;
  z-index:1;
}
.soon-box h2{font-size:1.9rem;margin-bottom:16px;}
.soon-box p{color:var(--text-dim);margin-bottom:28px;}

/* ---------- CONTACTO / FOOTER ---------- */
footer{
  background:var(--bg-alt);
  padding-top:100px;
}
.contact-inner{
  text-align:center;
  max-width:600px;
  margin:0 auto 64px;
}
.contact-inner h2{font-size:2rem;margin-bottom:16px;}
.contact-inner p{color:var(--text-dim);margin-bottom:32px;}

.contact-form{
  text-align:left;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:32px;
  box-shadow:0 16px 40px rgba(18,35,63,0.08);
}
.form-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:18px;
  margin-bottom:18px;
}
.form-group{
  display:flex;
  flex-direction:column;
  text-align:left;
}
.form-group.full{grid-column:1 / -1;}
.form-group label{
  font-size:0.85rem;
  font-weight:600;
  color:var(--text);
  margin-bottom:8px;
}
.form-group input,
.form-group textarea{
  font-family:'Inter', sans-serif;
  font-size:16px;
  color:var(--text);
  background:var(--bg);
  border:1.5px solid var(--card-border);
  border-radius:10px;
  padding:12px 14px;
  resize:vertical;
  transition:border-color .25s ease, box-shadow .25s ease;
}
.form-group input:focus,
.form-group textarea:focus{
  outline:none;
  border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(47,224,176,0.15);
}
.form-group textarea{min-height:120px;margin-bottom:18px;}
.contact-form .btn{width:100%;justify-content:center;}
.form-note{
  font-size:0.78rem;
  color:var(--text-dim);
  text-align:center;
  margin-top:16px;
}

@media (max-width:600px){
  .form-row{grid-template-columns:1fr;gap:0;}
  .contact-form{padding:24px 20px;}
}
.footer-bottom{
  border-top:1px solid var(--card-border);
  padding:28px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  flex-wrap:wrap;
  gap:16px;
  font-size:0.82rem;
  color:var(--text-dim);
}
.footer-socials{
  display:flex;
  gap:20px;
}
.footer-socials a{
  display:inline-block;
  color:var(--text-dim);
  padding:10px 2px;
  margin:-10px -2px;
  transition:color .25s ease;
}
.footer-socials a:hover{color:var(--gold);}

@media (max-width:600px){
  .footer-bottom{flex-direction:column;text-align:center;}
}

/* =========================================================
   COMPONENTES NUEVOS — Gramática, Ejercicios, Blog
   ========================================================= */

/* ---------- PAGE HERO (páginas internas, sin altura 100vh) ---------- */
.page-hero{
  padding:160px 0 72px;
  background:var(--bg-alt);
}
.page-hero .kicker{margin-bottom:20px;}
.page-hero h1{
  font-size:clamp(2rem, 4.4vw, 3.2rem);
  line-height:1.1;
  margin-bottom:18px;
}
.page-hero p.lead{
  color:var(--text-dim);
  font-size:1.1rem;
  max-width:640px;
}

.page-hero-split .container{
  display:grid;
  grid-template-columns:1.15fr 0.85fr;
  gap:48px;
  align-items:center;
}
.page-hero-image{
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 20px 50px rgba(18,35,63,0.14);
  aspect-ratio:4/3;
}
.page-hero-image img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
@media (max-width:860px){
  .page-hero-split .container{grid-template-columns:1fr;}
  .page-hero-image{order:-1;max-width:420px;margin:0 auto;}
}

/* ---------- BREADCRUMBS ---------- */
.breadcrumbs{
  font-size:0.82rem;
  color:var(--text-dim);
  margin-bottom:24px;
}
.breadcrumbs a{color:var(--gold);}
.breadcrumbs a:hover{text-decoration:underline;}
.breadcrumbs span{margin:0 6px;opacity:0.6;}

/* ---------- CATEGORY GRID (hub de gramática) ---------- */
.category-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(280px, 1fr));
  gap:24px;
}
.category-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:28px;
  transition:transform .3s ease, border-color .3s ease, box-shadow .3s ease;
}
.category-card:hover{
  transform:translateY(-4px);
  border-color:rgba(124,242,211,0.5);
  box-shadow:0 16px 36px rgba(18,35,63,0.1);
}
.category-card h3{
  font-size:1.25rem;
  margin-bottom:6px;
}
.category-card .category-count{
  font-size:0.8rem;
  color:var(--gold);
  font-weight:600;
  margin-bottom:14px;
  display:block;
}
.category-lessons{
  list-style:none;
}
.category-lessons li{margin-bottom:10px;}
.category-lessons a{
  font-size:0.92rem;
  font-weight:500;
  color:var(--text);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:10px;
  padding:6px 0;
}
.category-lessons a:hover{color:var(--gold);}
.category-lessons .lvl{
  font-size:0.7rem;
  color:var(--text-dim);
  border:1px solid var(--card-border);
  border-radius:999px;
  padding:2px 8px;
  white-space:nowrap;
}
.category-empty{
  font-size:0.88rem;
  color:var(--text-dim);
  font-style:italic;
}

/* ---------- LESSON LAYOUT ---------- */
.lesson-header{
  padding:150px 0 48px;
}
.lesson-header .kicker{margin-bottom:18px;}
.lesson-header h1{
  font-size:clamp(2rem, 4.2vw, 3rem);
  line-height:1.12;
  margin-bottom:16px;
}
.lesson-header p.lead{
  color:var(--text-dim);
  font-size:1.1rem;
  max-width:680px;
}
.lesson-meta{
  display:flex;
  gap:14px;
  flex-wrap:wrap;
  margin-top:24px;
}
.lesson-meta .lvl-badge{
  font-size:0.78rem;
  font-weight:600;
  color:var(--gold-soft);
  background:var(--red);
  border:1px solid var(--red-dim);
  padding:5px 12px;
  border-radius:999px;
}

.lesson-body{
  padding-top:0;
}
.lesson-grid{
  display:grid;
  grid-template-columns:0.72fr 2.28fr;
  gap:48px;
  align-items:start;
  min-width:0;
}
.lesson-content{
  min-width:0;
}
.toc{
  position:sticky;
  top:96px;
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:22px;
  min-width:0;
}
.toc-title{
  font-size:0.78rem;
  text-transform:uppercase;
  letter-spacing:0.08em;
  color:var(--gold);
  font-weight:700;
  margin-bottom:14px;
}
.toc ol{
  list-style:none;
  counter-reset:toc;
}
.toc li{
  counter-increment:toc;
  margin-bottom:4px;
}
.toc a{
  font-size:0.88rem;
  color:var(--text-dim);
  display:block;
  padding:6px 0;
}
.toc a::before{
  content:counter(toc) '. ';
  color:var(--gold);
  font-weight:600;
}
.toc a:hover{color:var(--text);}

.lesson-content h2{
  font-size:1.7rem;
  margin:56px 0 18px;
  scroll-margin-top:96px;
}
.lesson-content h2:first-child{margin-top:0;}
.lesson-content h3{
  font-size:1.2rem;
  margin:28px 0 12px;
  scroll-margin-top:96px;
}
.lesson-content p{
  color:var(--text-dim);
  margin-bottom:16px;
  max-width:72ch;
}
.lesson-content ul,
.lesson-content ol{
  color:var(--text-dim);
  margin:0 0 20px 22px;
}
.lesson-content li{margin-bottom:8px;}
.lesson-content strong{color:var(--text);}

.example-box{
  background:var(--bg-alt);
  border-left:3px solid var(--gold);
  border-radius:0 10px 10px 0;
  padding:16px 20px;
  margin:16px 0 24px;
  font-size:0.95rem;
}
.example-box .de{font-weight:600;color:var(--text);}
.example-box .es{color:var(--text-dim);font-style:italic;}

/* tables */
.table-wrap{
  overflow-x:auto;
  margin:20px 0 28px;
  border:1px solid var(--card-border);
  border-radius:var(--radius);
}
table{
  width:100%;
  border-collapse:collapse;
  font-size:0.9rem;
}
table th,
table td{
  padding:12px 16px;
  text-align:left;
  border-bottom:1px solid var(--card-border);
  white-space:nowrap;
}
table th{
  background:var(--bg-alt);
  color:var(--text);
  font-weight:700;
}
table td{color:var(--text-dim);}
table tr:last-child td{border-bottom:none;}

/* errores típicos */
.error-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-left:3px solid var(--red);
  border-radius:0 10px 10px 0;
  padding:18px 22px;
  margin-bottom:16px;
}
.error-card .wrong{color:var(--red-dim);font-weight:600;text-decoration:line-through;text-decoration-color:rgba(18,60,107,0.4);}
.error-card .right{color:var(--text);font-weight:600;}
.error-card p{margin:6px 0 0;font-size:0.92rem;}

/* ---------- EJERCICIO ---------- */
.exercise-box{
  background:linear-gradient(135deg, rgba(18,60,107,0.06), rgba(124,242,211,0.08));
  border:1px solid rgba(124,242,211,0.35);
  border-radius:20px;
  padding:40px;
  margin:16px 0 8px;
}
.exercise-box .kicker{margin-bottom:16px;}
.exercise-box h2{font-size:1.5rem;margin:0 0 12px;scroll-margin-top:96px;}
.exercise-box p{color:var(--text-dim);margin-bottom:0;}
.exercise-placeholder{
  margin-top:24px;
  background:var(--card);
  border:1.5px dashed var(--card-border);
  border-radius:var(--radius);
  padding:32px;
  text-align:center;
  color:var(--text-dim);
  font-size:0.92rem;
}
.exercise-placeholder b{display:block;color:var(--text);font-family:'Fraunces',serif;font-size:1.1rem;margin-bottom:8px;}

/* ---------- FAQ ---------- */
.faq-item{
  border-bottom:1px solid var(--card-border);
}
.faq-item:first-child{border-top:1px solid var(--card-border);}
.faq-q{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  background:none;
  border:none;
  text-align:left;
  padding:20px 4px;
  cursor:pointer;
  font-family:'Fraunces', serif;
  font-size:1.02rem;
  color:var(--text);
}
.faq-q .plus{
  flex-shrink:0;
  font-size:1.3rem;
  color:var(--gold);
  transition:transform .25s ease;
}
.faq-item.open .faq-q .plus{transform:rotate(45deg);}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq-a p{
  color:var(--text-dim);
  padding:0 4px 20px;
  max-width:70ch;
}
.faq-item.open .faq-a{max-height:400px;}

/* ---------- RELATED / CROSS-LINKS ---------- */
.related-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(240px, 1fr));
  gap:18px;
}
.related-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:20px;
  transition:transform .25s ease, border-color .25s ease;
}
.related-card:hover{transform:translateY(-4px);border-color:rgba(124,242,211,0.5);}
.related-card .lvl{
  font-size:0.7rem;
  color:var(--gold);
  font-weight:700;
  text-transform:uppercase;
  letter-spacing:0.05em;
}
.related-card h4{
  font-family:'Fraunces', serif;
  font-size:1rem;
  margin:8px 0 0;
  color:var(--text);
}

/* ---------- VIDEO CTA ---------- */
.video-cta{
  display:flex;
  align-items:center;
  gap:20px;
  background:var(--bg-alt);
  border-radius:var(--radius);
  padding:24px 28px;
  margin-top:8px;
  flex-wrap:wrap;
}
.video-cta .icon{
  width:52px;height:52px;
  border-radius:50%;
  background:linear-gradient(135deg, var(--red), var(--gold));
  color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-size:1.3rem;
  flex-shrink:0;
}
.video-cta p{color:var(--text-dim);margin:0;flex:1;min-width:200px;}
.video-cta strong{color:var(--text);}

@media (max-width:960px){
  .lesson-grid{grid-template-columns:1fr;}
  .toc{position:relative;top:0;}
}

/* ---------- EJERCICIOS: filtro por nivel ---------- */
.filter-bar{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:40px;
}
.filter-pill{
  font-size:0.85rem;
  font-weight:600;
  color:var(--text-dim);
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:999px;
  padding:9px 18px;
  cursor:pointer;
  transition:all .2s ease;
}
.filter-pill:hover{border-color:var(--gold);color:var(--text);}
.filter-pill.active{
  background:linear-gradient(135deg, var(--red), var(--red-dim));
  color:#fff;
  border-color:transparent;
}

.exercise-index-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit, minmax(280px, 1fr));
  gap:20px;
}
.exercise-index-card{
  background:var(--card);
  border:1px solid var(--card-border);
  border-radius:var(--radius);
  padding:24px;
  transition:transform .25s ease, border-color .25s ease;
}
.exercise-index-card:hover{transform:translateY(-4px);border-color:rgba(124,242,211,0.5);}
.exercise-index-card .top-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:10px;
}
.exercise-index-card .lvl-badge{
  font-size:0.72rem;
  font-weight:700;
  color:var(--gold-soft);
  background:var(--red);
  border:1px solid var(--red-dim);
  padding:3px 10px;
  border-radius:999px;
}
.exercise-index-card .cat{
  font-size:0.75rem;
  color:var(--text-dim);
  text-transform:uppercase;
  letter-spacing:0.04em;
}
.exercise-index-card h3{font-size:1.05rem;margin-bottom:10px;}
.exercise-index-card a.go{
  font-size:0.88rem;
  font-weight:600;
  color:var(--gold);
}

/* ---------- BLOG LIST ---------- */
.blog-list{
  display:flex;
  flex-direction:column;
  gap:0;
}
.blog-item{
  display:grid;
  grid-template-columns:140px 1fr;
  gap:24px;
  padding:28px 0;
  border-bottom:1px solid var(--card-border);
}
.blog-item:first-child{border-top:1px solid var(--card-border);}
.blog-thumb{
  width:140px;
  height:140px;
  border-radius:14px;
  overflow:hidden;
  flex-shrink:0;
}
.blog-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s cubic-bezier(.16,.84,.44,1);
}
.blog-item:hover .blog-thumb img{transform:scale(1.06);}
.blog-item .date{
  font-size:0.82rem;
  color:var(--text-dim);
  margin-bottom:6px;
}
.blog-item h3{
  font-size:1.25rem;
  margin-bottom:8px;
}
.blog-item h3 a:hover{color:var(--gold);}
.blog-item p{color:var(--text-dim);font-size:0.95rem;margin-bottom:10px;}
.blog-item .tags{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}
.blog-item .tag{
  font-size:0.72rem;
  color:var(--gold-soft);
  background:var(--red);
  border:1px solid var(--red-dim);
  padding:3px 10px;
  border-radius:999px;
}

@media (max-width:600px){
  .blog-item{grid-template-columns:1fr;gap:14px;}
  .blog-thumb{width:100%;height:180px;}
}