:root{
  --accent:hsl(155 90% 55%);
  --accent-soft:hsl(155 90% 65%);
  --bg-main:#0b1220;
  --bg-dark:#050a16;
  --text:#e5e7eb;
  --muted:#94a3b8;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}

body{
  font-family:'Ubuntu',sans-serif;
  background:var(--bg-main);
  color:var(--text);
  overflow-x:hidden;
}

/* ================= PARTICLES ================= */

canvas{
  position:fixed;
  inset:0;
  z-index:-2;
  pointer-events:none;
}

/* ================= NAVBAR ================= */

header{
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:22px 60px;
  position:fixed;
  width:100%;
  top:0;
  z-index:1000;
  transition:.4s ease;
}

header.scrolled{
  background:rgba(11,18,32,.85);
  backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.05);
}

.logo{display:flex;align-items:center;gap:14px}

.logo-icon{
  background:var(--accent);
  color:black;
  font-weight:bold;
  font-size:18px;
  width:44px;height:44px;
  border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-family:monospace;
  box-shadow:0 0 25px rgba(0,255,170,.6);
}

.cursor{animation:blink 1s infinite}
@keyframes blink{50%{opacity:0}}

.gradient-logo{
  font-size:22px;
  font-weight:700;
  background:linear-gradient(90deg,var(--accent),#6ee7b7,var(--accent-soft));
  background-size:200% auto;
  -webkit-background-clip:text;
  color:transparent;
  animation:gradientMove 4s linear infinite;
  margin-bottom: 5px;
}
@keyframes gradientMove{to{background-position:200% center}}

nav{display:flex;gap:20px}

nav a{
  text-decoration:none;
  color:var(--muted);
  font-weight:500;
  transition:.3s;
}

nav a:hover,
nav a.active{color:var(--accent)}

.cta,.main-btn{
  background:var(--accent);
  color:black;
  padding:14px 28px;
  border-radius:12px;
  font-weight:600;
  text-decoration:none;
  transition:.3s;
  box-shadow:0 0 20px rgba(0,255,170,.4);
}

.cta:hover,.main-btn:hover{
  transform:translateY(-3px);
  box-shadow:0 0 40px rgba(0,255,170,.7);
}

/* ================= HERO ================= */

.hero{
  position:relative;
  z-index:2;
  text-align:center;
  padding:260px 20px 200px;
}

.hero small{
  color:var(--accent);
  font-weight:600;
  letter-spacing:1px;
}

.hero h1{
  font-size:64px;
  margin:20px 0 30px;
  font-weight:800;
  line-height:1.1;
}

.gradient-text{
  background:linear-gradient(to right,var(--accent),#6ee7b7,var(--accent-soft));
  -webkit-background-clip:text;
  color:transparent;
}

.hero-sub{
  max-width:760px;
  margin:0 auto 60px;
  font-size:19px;
  color:var(--muted);
  line-height:1.7;
  opacity:0;
  animation:fadeInSub 1s ease forwards;
  animation-delay:2s;
}
@keyframes fadeInSub{to{opacity:1}}

/* ================= SECTIONS ================= */

.section{
  padding:160px 60px;
  min-height:100vh;
  text-align:center;
  opacity:0;
  transform:translateY(40px);
  transition:.8s;
}
.section.visible{
  opacity:1;
  transform:translateY(0);
}

.section.alt{background:rgba(5,10,22,.4)}

.section-sub{
  color:var(--muted);
  margin-top:20px;
  margin-bottom:70px;
  font-size:18px;
}

/* ================= CARDS ================= */

.cards{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:30px;
  max-width:1100px;
  margin:0 auto;
}

.card{
  background:rgba(17,24,39,.6);
  padding:30px;
  border-radius:18px;
  backdrop-filter:blur(10px);
  border:1px solid rgba(255,255,255,.05);
  transition:.4s ease;
  text-align:left;
  transform-style:preserve-3d;
}

.card h3{margin-bottom:15px;color:var(--accent)}
.card p{color:var(--muted);line-height:1.6}

.card:hover{
  transform:translateY(-10px) scale(1.02);
  box-shadow:0 0 30px rgba(0,255,170,.25);
  border:1px solid rgba(0,255,170,.3);
}

.badge{
  display:inline-block;
  padding:6px 12px;
  font-size:12px;
  font-weight:600;
  border-radius:20px;
  margin-bottom:15px;
  background:rgba(0,255,170,.15);
  color:var(--accent);
  border:1px solid rgba(0,255,170,.4);
}

.progress{
  height:6px;
  background:#1f2937;
  border-radius:5px;
  margin:18px 0 10px;
  overflow:hidden;
}

.progress span{
  display:block;
  height:100%;
  background:var(--accent);
}

/* ================= MODAL ================= */

.modal{
  position:fixed;
  inset:0;
  background:rgba(0,0,0,.7);
  display:flex;
  align-items:center;
  justify-content:center;
  opacity:0;
  pointer-events:none;
  transition:.3s;
  z-index:2000;
}

.modal.active{
  opacity:1;
  pointer-events:all;
}

.modal-content{
  background:var(--bg-dark);
  padding:40px;
  border-radius:16px;
  width:90%;
  max-width:400px;
  text-align:center;
  border:1px solid rgba(255,255,255,.08);
}

.close-modal{
  margin-top:20px;
  cursor:pointer;
  color:var(--accent);
  font-weight:600;
}

/* ================= PRICING ================= */

.pricing{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:50px;
  max-width:1200px;
  margin:80px auto 0;
}

.price-card{
  background:rgba(17,24,39,.6);
  padding:50px 40px;
  border-radius:20px;
  border:1px solid rgba(255,255,255,.05);
  transition:.4s;
}

.price-card:hover{
  transform:translateY(-10px);
  box-shadow:0 0 40px rgba(0,255,170,.25);
}

.price-card:nth-child(2){
  border:1px solid var(--accent);
  box-shadow:0 0 60px rgba(0,255,170,.25);
  transform:translateY(-20px);
}

.price{
  font-size:40px;
  color:var(--accent);
  margin:20px 0;
}
.price{
  margin:20px 0 25px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
}
.price{
  margin:20px 0 25px 0;
  display:flex;
  flex-wrap:wrap;
  align-items:baseline;
  gap:10px;
}

/* precio anterior tachado */
.old{
  font-size:15px;        /* más chico */
  color:#64748b;
  text-decoration:line-through;
  width:100%;
}

/* precio principal */
.amount{
  font-size:36px;        /* más elegante */
  font-weight:700;
  letter-spacing:-1px;
}

/* periodo */
.period{
  font-size:16px;        /* más chico */
  color:#94a3b8;
}
/* precio anterior tachado */
.old{
  font-size:15px;        /* más chico */
  color:#64748b;
  text-decoration:line-through;
  width:100%;
}

/* precio principal */
.amount{
  font-size:36px;        /* más elegante */
  font-weight:700;
  letter-spacing:-1px;
}

/* periodo */
.period{
  font-size:16px;        /* más chico */
  color:#94a3b8;
}
.price-p{margin-bottom:40px}

/* ================= RESPONSIVE ================= */

@media(max-width:900px){
  header{padding:20px}
  .hero{padding:220px 20px 160px}
  .hero h1{font-size:48px}
  .section{padding:120px 25px}
}

@media(max-width:600px){
  nav{display:none}
  .hero h1{font-size:36px}
  .cta{display:none}
}

footer{
  text-align:center;
  padding:40px;
  background:var(--bg-dark);
  color:var(--muted);
}
.section-header{
  max-width:750px;
  margin:0 auto 70px;
  text-align:center;
}

.section-tag{
  display:inline-block;
  font-size:12px;
  font-weight:600;
  letter-spacing:1px;
  padding:6px 14px;
  border-radius:20px;
  background:rgba(0,255,170,.1);
  border:1px solid rgba(0,255,170,.3);
  color:var(--accent);
  margin-bottom:18px;
}

.section-header h2{
  font-size:38px;
  margin-bottom:20px;
}

.section-header p{
  color:var(--muted);
  font-size:18px;
  line-height:1.6;
}

.section-cta{
  margin-top:30px;
  display:inline-block;
}

/* Diferenciar visualmente cada sección */

.academy-section{
  background:linear-gradient(to bottom, transparent, rgba(0,255,170,.03));
}

.notes-section{
  background:linear-gradient(to bottom, transparent, rgba(100,150,255,.03));
}

.labs-section{
  background:linear-gradient(to bottom, transparent, rgba(255,100,255,.03));
}

.highlight-card{
  border:1px solid var(--accent);
  box-shadow:0 0 40px rgba(0,255,170,.25);
  transform:scale(1.03);
}
.card-icon{
  width:52px;
  height:52px;
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:26px;
  border-radius:14px;
  margin-bottom:18px;

  background:rgba(0,255,170,.08);
  border:1px solid rgba(0,255,170,.3);

  box-shadow:0 0 25px rgba(0,255,170,.15);
  transition:.3s ease;
}

.notes-section .card:hover .card-icon{
  transform:scale(1.1);
  box-shadow:0 0 35px rgba(0,255,170,.35);
}
/* HACKER ICON STYLE */

.hacker-card .card-icon{
  width:54px;
  height:54px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-radius:14px;
  margin-bottom:20px;

  background:rgba(0,255,170,.05);
  border:1px solid rgba(0,255,170,.25);

  color:var(--accent);
  transition:.3s ease;
}

.hacker-card .card-icon svg{
  width:26px;
  height:26px;
}

/* Hover efecto hacker */

.hacker-card:hover .card-icon{
  background:rgba(0,255,170,.15);
  box-shadow:0 0 25px rgba(0,255,170,.35);
  transform:scale(1.08);
}

.hacker-card:hover{
  box-shadow:0 0 45px rgba(0,255,170,.15);
  border:1px solid rgba(0,255,170,.4);
}
/* ===== NOTES SaaS STYLE ===== */

.notes-card .card-icon{
  width:48px;
  height:48px;
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:22px;

  border-radius:12px;
  background:rgba(255,255,255,0.04);
  border:1px solid rgba(255,255,255,0.08);

  color:#ffffff;
  transition:.25s ease;
}

.notes-card .card-icon svg{
  width:24px;
  height:24px;
}

/* Hover profesional */

.notes-card:hover .card-icon{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.15);
  transform:translateY(-2px);
}

.notes-card:hover{
  border:1px solid rgba(255,255,255,0.12);
  box-shadow:0 10px 30px rgba(0,0,0,.35);
}
/* ===== COURSE CARD REAL PREMIUM ===== */

.course-card{
  background:#0f172a;
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 25px 60px rgba(0,0,0,.6);
  display:flex;
  flex-direction:column;
  transition:.35s ease;
}

.course-card:hover{
  transform:translateY(-8px);
}

/* Imagen superior REAL */
.course-thumb{
  position:relative;
  height:220px;
  overflow:hidden;
}

.course-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}

.course-thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to bottom,rgba(0,0,0,.2),rgba(0,0,0,.6));
}

/* Badges */
.level{
  position:absolute;
  top:16px;
  left:16px;
  background:#7f1d1d;
  color:#fff;
  padding:6px 12px;
  font-size:12px;
  border-radius:8px;
  z-index:2;
}

.featured{
  position:absolute;
  top:16px;
  right:16px;
  background:#f59e0b;
  color:#111;
  padding:6px 14px;
  font-size:12px;
  border-radius:999px;
  font-weight:600;
  z-index:2;
}

/* Cuerpo inferior */
.course-body{
  padding:26px;
  display:flex;
  flex-direction:column;
  flex:1;
  text-align:left; /* IMPORTANTE */
}

.course-body h3{
  font-size:22px;
  margin-bottom:12px;
}

.course-body p{
  color:#94a3b8;
  font-size:14px;
  line-height:1.6;
  margin-bottom:20px;
}

.course-meta{
  display:flex;
  gap:18px;
  font-size:13px;
  margin-bottom:20px;
  color:#cbd5e1;
}

.rating{
  color:#facc15;
}

.course-footer{
  margin-top:auto;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.05);
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.members{
  font-size:13px;
  color:#64748b;
}

.course-btn{
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  padding:10px 18px;
  border-radius:10px;
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  color:#fff;
  transition:.3s;
}

.course-btn:hover{
  box-shadow:0 10px 25px rgba(99,102,241,.4);
}
.course-card{
  text-align:left;
}

/* ===== THUMB ===== */

.course-thumb{
  position:relative;
  height:210px;
  overflow:hidden;
}

.course-thumb::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to bottom, rgba(0,0,0,.15), rgba(0,0,0,.45));
}

.course-thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .5s ease;
}

.course-card:hover .course-thumb img{
  transform:scale(1.08);
}

/* ===== BADGES ===== */

.level{
  position:absolute;
  top:18px;
  left:18px;
  padding:7px 14px;
  font-size:12px;
  font-weight:700;
  border-radius:8px;
  letter-spacing:.5px;
  z-index:2;
}

.level.avanzado{background:#7f1d1d;color:#fff;}
.level.intermedio{background:#78350f;color:#fff;}
.level.principiante{background:#14532d;color:#fff;}

.featured{
  position:absolute;
  top:18px;
  right:18px;
  padding:7px 16px;
  font-size:12px;
  font-weight:700;
  border-radius:999px;
  background:#f59e0b;
  color:#111;
  z-index:2;
}

/* ===== BODY ===== */

.course-body{
  padding:30px 28px;
  display:flex;
  flex-direction:column;
  flex:1;
}

.course-body h3{
  font-size:24px;
  font-weight:700;
  margin-bottom:14px;
}

.course-body p{
  color:#9ca3af;
  font-size:15px;
  line-height:1.7;
  margin-bottom:26px;
}

/* ===== META ===== */

.course-meta{
  display:flex;
  gap:22px;
  font-size:14px;
  color:#cbd5e1;
  margin-bottom:28px;
}

.rating{
  color:#facc15;
  font-weight:600;
}

/* ===== FOOTER ===== */

.course-footer{
  margin-top:auto;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.06);
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.members{
  font-size:14px;
  color:#64748b;
}

.course-btn{
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  color:#fff;
  padding:11px 20px;
  border-radius:12px;
  font-weight:600;
  font-size:14px;
  text-decoration:none;
  transition:.3s;
}

.course-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 12px 30px rgba(99,102,241,.5);
}

/* BADGES */

.level{
  position:absolute;
  top:14px;
  left:14px;
  padding:6px 12px;
  font-size:12px;
  font-weight:600;
  border-radius:8px;
  background:#7c2d12;
  color:#fff;
}

.level.intermedio{background:#854d0e;}
.level.principiante{background:#14532d;}

.featured{
  position:absolute;
  top:14px;
  right:14px;
  padding:6px 12px;
  font-size:12px;
  font-weight:600;
  border-radius:20px;
  background:#f59e0b;
  color:#111;
}

/* BODY */

.course-body{
  padding:24px;
  display:flex;
  flex-direction:column;
  flex:1;
}

.course-body h3{
  font-size:22px;
  margin-bottom:12px;
}

.course-body p{
  color:#94a3b8;
  font-size:15px;
  line-height:1.6;
  margin-bottom:20px;
}

/* META */

.course-meta{
  display:flex;
  gap:20px;
  font-size:14px;
  color:#cbd5e1;
  margin-bottom:20px;
}

.rating{
  color:#facc15;
  font-weight:600;
}

/* FOOTER */

.course-footer{
  margin-top:auto;
  padding-top:18px;
  border-top:1px solid rgba(255,255,255,.05);
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.members{
  font-size:14px;
  color:#64748b;
}

.course-btn{
  background:linear-gradient(90deg,#7c3aed,#6366f1);
  color:#fff;
  padding:10px 18px;
  border-radius:10px;
  text-decoration:none;
  font-weight:600;
  transition:.3s;
}

.course-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 25px rgba(99,102,241,.4);
}
.courses-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap:40px;
  max-width:1200px;
  margin:80px auto;
  padding:0 20px;
}
.course-card-horizontal{
  display:flex;
  gap:40px;
  background:#0f172a;
  border-radius:20px;
  padding:30px;
  box-shadow:0 25px 60px rgba(0,0,0,.6);
  max-width:1200px;
  margin:40px auto;
  align-items:center;
  transition:.3s;
}

.course-card-horizontal:hover{
  transform:translateY(-6px);
}

/* Imagen */
.thumb{
  position:relative;
  flex:0 0 420px;
  height:240px;
  border-radius:16px;
  overflow:hidden;
}

.thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
}

/* Badges */
.level{
  position:absolute;
  top:14px;
  left:14px;
  background:#7f1d1d;
  padding:6px 12px;
  border-radius:8px;
  font-size:12px;
  color:#fff;
}

.featured{
  position:absolute;
  top:14px;
  right:14px;
  background:#f59e0b;
  padding:6px 14px;
  border-radius:999px;
  font-size:12px;
  font-weight:600;
  color:#111;
}

/* Contenido */
.content{
  flex:1;
}

.content h3{
  font-size:26px;
  margin-bottom:14px;
}

.content p{
  color:#9ca3af;
  line-height:1.6;
  margin-bottom:20px;
}

.meta{
  display:flex;
  gap:20px;
  margin-bottom:24px;
  font-size:14px;
  color:#cbd5e1;
}

.rating{
  color:#facc15;
}

.footer{
  display:flex;
  justify-content:space-between;
  align-items:center;
  border-top:1px solid rgba(255,255,255,.05);
  padding-top:18px;
}

.members{
  color:#64748b;
  font-size:14px;
}

.btn{
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  padding:10px 20px;
  border-radius:12px;
  color:#fff;
  text-decoration:none;
  font-weight:600;
}
#academia .btn{
  background:linear-gradient(135deg,#10b981,#06b6d4);
}
#academia .btn{
  background:linear-gradient(135deg,#10b981,#06b6d4);
}
/* ===== ACADEMIA SECTION ===== */

#academia{
  padding:100px 0;
  background: radial-gradient(circle at top, rgba(99, 102, 241, .08), transparent 60%);
}

/* HEADER */

.academy-header{
  text-align:center;
  max-width:800px;
  margin:0 auto 80px auto;
  padding:0 20px;
}

.badge-top{
  display:inline-block;
  background:rgba(16,185,129,.15);
  color:#34d399;
  padding:6px 16px;
  border-radius:999px;
  font-size:13px;
  margin-bottom:20px;
}

.academy-header h2{
  font-size:40px;
  margin-bottom:20px;
  margin-top: 20px;
}

.academy-header p{
  color:#9ca3af;
  margin-bottom:30px;
}

.main-btn{
  background:linear-gradient(135deg,#10b981,#06b6d4);
  padding:14px 28px;
  border-radius:14px;
  text-decoration:none;
  color:#fff;
  font-weight:600;
}

/* GRID */

.academy-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap:40px;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

/* CARD */

.academy-card{
  background:#0f172a;
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.6);
  display:flex;
  flex-direction:column;
  transition:.3s ease;
}

.academy-card:hover{
  transform:translateY(-8px);
}
/* ===== FONDOS SEGÚN NIVEL ===== */

.academy-card{
  position:relative;
  border:1px solid rgba(255,255,255,.05);
}

/* efecto glow general */
.academy-card::before{
  content:"";
  position:absolute;
  inset:0;
  border-radius:20px;
  opacity:.15;
  z-index:0;
  transition:.4s ease;
}

.academy-card .content,
.academy-card .thumb{
  position:relative;
  z-index:1;
}

/* ===== BÁSICO ===== */
.academy-card.basico::before{
  background: radial-gradient(circle at top left,
              #10b981,
              transparent 60%);
}

.academy-card.basico:hover{
  box-shadow:
    0 30px 70px rgba(0,0,0,.8),
    0 0 40px rgba(16,185,129,.35);
}

/* ===== INTERMEDIO ===== */
.academy-card.intermedio::before{
  background: radial-gradient(circle at top left,
              #f59e0b,
              transparent 60%);
}

.academy-card.intermedio:hover{
  box-shadow:
    0 30px 70px rgba(0,0,0,.8),
    0 0 40px rgba(245,158,11,.35);
}

/* ===== AVANZADO ===== */
.academy-card.avanzado::before{
  background: radial-gradient(circle at top left,
              #ef4444,
              transparent 60%);
}

.academy-card.avanzado:hover{
  box-shadow:
    0 30px 70px rgba(0,0,0,.8),
    0 0 40px rgba(239,68,68,.35);
}

/* THUMB */

.thumb{
  position:relative;
  height:200px;
  overflow:hidden;
}

.thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
}

.level{
  position:absolute;
  top:14px;
  left:14px;
  padding:6px 12px;
  font-size:12px;
  border-radius:8px;
  color:#fff;
}

.level.intermedio{ background:#78350f; }
.level.avanzado{ background:#7f1d1d; }
.level.principiante{ background:#22c55e; }

/* CONTENT */

.content{
  padding:24px;
  display:flex;
  flex-direction:column;
  flex:1;
}

.content h3{
  font-size:22px;
  margin-bottom:12px;
}

.content p{
  color:#94a3b8;
  font-size:14px;
  line-height:1.6;
  margin-bottom:20px;
}

.meta{
  display:flex;
  gap:18px;
  font-size:13px;
  color:#cbd5e1;
  margin-bottom:20px;
}

.rating{
  color:#facc15;
}

/* FOOTER */

.footer{
  margin-top:auto;
  padding-top:16px;
  border-top:1px solid rgba(255,255,255,.05);
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.members{
  font-size:13px;
  color:#64748b;
}

.btn{
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  padding:10px 18px;
  border-radius:10px;
  font-size:14px;
  text-decoration:none;
  color:#fff;
  font-weight:600;
}
.thumb img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition: transform .6s ease;
}

.academy-card:hover .thumb img{
  transform: scale(1.08);
}
.academy-card{
  background:#0f172a;
  border-radius:20px;
  overflow:hidden;
  box-shadow:0 20px 50px rgba(0,0,0,.6);
  display:flex;
  flex-direction:column;
  transition:.4s ease;
  border:1px solid rgba(255,255,255,.04);
}

.academy-card:hover{
  transform:translateY(-10px);
  box-shadow:
    0 30px 70px rgba(0,0,0,.8),
    0 0 40px rgba(99,102,241,.25);
}
.academy-card{
  opacity:0;
  transform: translateY(40px);
  animation: fadeUp .8s ease forwards;
}

.academy-card:nth-child(2){
  animation-delay:.2s;
}

.academy-card:nth-child(3){
  animation-delay:.4s;
}

@keyframes fadeUp{
  to{
    opacity:1;
    transform:translateY(0);
  }
}
#notas{
  background: radial-gradient(circle at top, rgba(99, 102, 241, .08), transparent 60%);
  padding:100px 0;
}

#labs{
  background: radial-gradient(circle at top, rgba(99, 102, 241, .08), transparent 60%);
}

.notas-header{
  text-align:center;
  max-width:700px;
  margin:0 auto 70px auto;
}

.notas-header h2{
  font-size:38px;
  margin-bottom:15px;
  margin-top: 20px;
}

.notas-header p{
  color:#94a3b8;
}

/* GRID */

.notas-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap:40px;
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}

/* CARD */

.nota-card{
  background:#0f172a;
  border-radius:18px;
  overflow:hidden;
  transition:.4s ease;
  border:1px solid rgba(255,255,255,.05);
}

.nota-card:hover{
  transform:translateY(-8px);
  box-shadow:0 25px 60px rgba(0,0,0,.6);
}

/* IMG */

.nota-img{
  position:relative;
  height:220px;
  overflow:hidden;
}

.nota-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:.6s ease;
}

.nota-card:hover img{
  transform:scale(1.07);
}

/* CATEGORIA */

.categoria{
  position:absolute;
  top:15px;
  left:15px;
  background:#ef4444;
  padding:6px 14px;
  font-size:12px;
  border-radius:8px;
  color:#fff;
}

.categoria.azul{
  background:#3b82f6;
}

/* CONTENT */

.nota-content{
  padding:22px;
}

.nota-content h3{
  font-size:20px;
  margin-bottom:12px;
}

.nota-content p{
  font-size:14px;
  color:#94a3b8;
  margin-bottom:18px;
}

.nota-meta{
  display:flex;
  justify-content:space-between;
  font-size:13px;
  color:#64748b;
}
#suscripciones{
  padding:120px 20px;
  background: radial-gradient(circle at top,
              rgba(99,102,241,.08),
              transparent 60%);
}

.suscripciones-header{
  text-align:center;
  margin-bottom:70px;
}

.suscripciones-header h2{
  font-size:42px;
  margin-bottom:15px;
}

.suscripciones-header p{
  color:#94a3b8;
}

/* GRID */

.pricing-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(300px,1fr));
  gap:40px;
  max-width:1200px;
  margin:0 auto;
}

/* CARD */

.pricing-card{
  background:#0f172a;
  padding:40px;
  border-radius:24px;
  border:1px solid rgba(255,255,255,.05);
  position:relative;
  transition:.4s ease;
  box-shadow:0 25px 60px rgba(0,0,0,.6);
}

.pricing-card:hover{
  transform:translateY(-10px);
  box-shadow:
    0 40px 80px rgba(0,0,0,.8),
    0 0 40px rgba(99,102,241,.3);
}

.pricing-card h3{
  font-size:22px;
  font-weight:600;
}

.plan-desc{
  font-size:14px;
  color:#94a3b8;
  margin-bottom:10px;
}

ul li{
  font-size:14px;
  color:#cbd5e1;
}
/* DESTACADO */

.featured{
  border:1px solid rgba(99,102,241,.6);
  box-shadow:
    0 30px 80px rgba(99,102,241,.25);
}

.premium{
  border:1px solid rgba(168,85,247,.6);
}

/* BADGE */

.badge{
  position:absolute;
  top:-14px;
  left:50%;
  transform:translateX(-50%);
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  padding:6px 20px;
  border-radius:20px;
  font-size:12px;
  font-weight:600;
}

.premium-badge{
  background:linear-gradient(135deg,#a855f7,#ec4899);
}

/* ICON */

.plan-icon{
  width:40px;
  height:40px;
  stroke-width:2;
  color:#a5b4fc;
  margin-bottom:20px;
}

/* PRICE */

.price{
  margin:20px 0;
}

.old{
  text-decoration:line-through;
  color:#64748b;
  display:block;
}

.amount{
  font-size:46px;
  font-weight:700;
}

.period{
  color:#94a3b8;
  margin-left:6px;
}

/* LIST */

ul{
  list-style:none;
  padding:0;
  margin:25px 0;
}

ul li{
  margin-bottom:12px;
  color:#cbd5e1;
}

/* BUTTON */

.btn-pricing{
  width:100%;
  padding:14px;
  border:none;
  border-radius:14px;
  background:linear-gradient(135deg,#6366f1,#8b5cf6);
  color:#fff;
  font-weight:600;
  cursor:pointer;
  transition:.3s ease;
}

.btn-pricing:hover{
  transform:scale(1.03);
}

/* NOTE */

.plan-note{
  display:block;
  margin-top:18px;
  font-size:13px;
  text-align:center;
  color:#94a3b8;
}
.featured h3{
  color:#ffffff;
  font-weight:700;
}
.pricing-card:nth-child(1) .plan-icon { color:#34d399; }
.featured .plan-icon { color:#6366f1; }
.premium .plan-icon { color:#ec4899; }

@media (max-width:768px){
  header {
    padding:16px 20px;
  }

  .hero {
    padding:180px 15px 120px;
  }

  .hero h1 {
    font-size:32px;
  }

  .hero-sub {
    font-size:16px;
  }
  .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
@media (max-width:600px){
  .academy-grid,
  .notas-grid,
  .courses-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
    gap:20px;
    padding:0 15px;
  }
  .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
@media (max-width:768px){
  .course-card-horizontal {
    flex-direction: column;
    gap:20px;
    max-width:100%;
  }

  .course-card-horizontal .thumb {
    flex:1 1 100%;
    height:200px;
  }
 .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
@media (max-width:600px){
  h2, .academy-header h2, .notas-header h2, .suscripciones-header h2 {
    font-size:28px;
  }

  h3, .content h3, .course-body h3 {
    font-size:18px;
  }

  .course-body p,
  .nota-content p,
  .plan-desc,
  ul li {
    font-size:13px;
  }

  .btn, .course-btn, .btn-pricing {
    font-size:13px;
    padding:10px 16px;
  }
  .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
@media (max-width:600px){
  footer {
    padding:30px 15px;
    font-size:13px;
  }
  .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
/* BOTÓN HAMBURGUESA */
.menu-toggle {
  display: none; /* oculto en desktop */
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 22px;
  cursor: pointer;
  z-index: 1001; /* sobre el nav */
}

.menu-toggle span {
  display: block;
  height: 3px;
  width: 100%;
  background: var(--accent);
  border-radius: 2px;
  transition: 0.3s;
}

/* TRANSFORMACIÓN A X */
.menu-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.open span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* MENÚ RESPONSIVE */
@media(max-width: 900px){
  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 250px;
    height: 100vh;
    background: var(--bg-dark);
    flex-direction: column;
    padding-top: 100px;
    gap: 30px;
    transition: 0.3s;
    display: flex;
  }

  nav.active {
    right: 0;
  }

  nav a {
    font-size: 18px;
    color: var(--text);
    padding: 10px 20px;
  }

  .menu-toggle {
    display: flex;
  }
  .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
/* Ocultar Suscripciones en desktop */
.suscripciones-link {
  display: none;
}

/* Mostrar en móviles responsive */
@media(max-width: 900px){
  .suscripciones-link {
    display: block;
  }
  .premium {
    margin-top: 30px;
  }
  .logo-a{
    text-decoration: none;
    color: inherit;
  }
}
.logo-a{
  text-decoration: none;
  color: inherit;
}