/* =========================================================
   SUBAQUÁTICA NQN — Landing page
   Colores / tipografía / espacios principales se editan aquí.
   ========================================================= */

:root{
  --bg:#03111f;
  --bg-soft:#071b2e;
  --surface:#0a2237;
  --surface-2:#0d2b43;
  --text:#eef9ff;
  --muted:#9bb6c9;
  --aqua:#2ee6d6;
  --cyan:#7cecff;
  --line:rgba(255,255,255,.11);
  --shadow:0 24px 80px rgba(0,0,0,.32);
  --radius:24px;
  --container:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:
    radial-gradient(circle at 75% 18%, rgba(46,230,214,.07), transparent 28rem),
    var(--bg);
  color:var(--text);
  font-family:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height:1.55;
  -webkit-font-smoothing:antialiased;
}
body.menu-open{overflow:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}
::selection{background:var(--aqua);color:#00131a}

.skip-link{
  position:fixed;left:16px;top:-80px;z-index:9999;
  background:white;color:#00131a;padding:12px 16px;border-radius:10px;
}
.skip-link:focus{top:16px}
.container{width:min(calc(100% - 40px),var(--container));margin-inline:auto}
.section{padding:110px 0}
.eyebrow{
  margin:0 0 14px;
  color:var(--aqua);
  font-size:.78rem;
  font-weight:800;
  letter-spacing:.15em;
  text-transform:uppercase;
}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{letter-spacing:-.035em;line-height:1.02}
h2{font-size:clamp(2.4rem,6vw,5rem);margin-bottom:22px;max-width:900px}
.lead{font-size:clamp(1.15rem,2vw,1.45rem);color:#d4e8f3}
.section-heading{max-width:760px;margin-bottom:52px}
.section-heading>p:not(.eyebrow){color:var(--muted);font-size:1.08rem}
.section-heading.split{
  max-width:none;display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:end
}
.section-heading.split>p{max-width:440px;margin-bottom:12px}

.btn{
  min-height:52px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:12px;
  border:1px solid transparent;
  border-radius:999px;
  padding:14px 22px;
  font-weight:800;
  transition:.25s ease;
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{
  color:#001419;
  background:linear-gradient(135deg,var(--aqua),var(--cyan));
  box-shadow:0 12px 38px rgba(46,230,214,.2);
}
.btn-primary:hover{box-shadow:0 16px 48px rgba(46,230,214,.28)}
.btn-ghost{border-color:var(--line);background:rgba(255,255,255,.045);backdrop-filter:blur(10px)}
.btn-ghost:hover{border-color:rgba(124,236,255,.45);background:rgba(255,255,255,.075)}
.btn-large{min-height:62px;padding:18px 28px}

/* Header */
.site-header{
  position:fixed;z-index:100;top:0;left:0;right:0;
  padding:14px 0;
  transition:.3s ease;
}
.site-header.scrolled{
  background:rgba(3,17,31,.82);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--line);
  padding:9px 0;
}
.nav-wrap{
  width:min(calc(100% - 32px),1240px);margin:auto;
  display:flex;align-items:center;justify-content:space-between;gap:20px;
}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0}
.brand-logo{display:block;width:220px;height:58px;object-fit:contain;object-position:left center}
.brand-logo-panel{width:min(100%,360px);height:auto;max-height:138px}
.brand-logo-footer{width:260px;height:auto;max-height:110px}
.brand-mark{
  width:38px;height:38px;border-radius:50%;
  display:grid;place-items:center;
  color:#001419;font-weight:950;font-style:italic;
  background:linear-gradient(135deg,var(--cyan),var(--aqua));
  box-shadow:inset 0 0 0 4px rgba(255,255,255,.15);
  flex:0 0 auto;
}
.brand-mark.large{width:54px;height:54px;font-size:1.3rem}
.brand-copy{display:flex;flex-direction:column;line-height:1.05}
.brand-copy strong{font-size:.9rem;letter-spacing:.08em}
.brand-copy small{margin-top:5px;color:var(--muted);font-size:.55rem;letter-spacing:.12em}
.site-menu{display:flex;align-items:center;gap:28px;color:#c8dbe5;font-size:.92rem;font-weight:700}
.site-menu>a:not(.nav-cta):hover{color:white}
.nav-cta{
  color:#001419!important;
  background:var(--aqua);
  padding:10px 16px;border-radius:999px;
}
.menu-toggle{
  display:none;width:44px;height:44px;border:1px solid var(--line);background:rgba(3,17,31,.5);
  border-radius:50%;position:relative;color:white
}
.menu-toggle span{position:absolute;width:18px;height:2px;background:currentColor;left:12px;transition:.25s}
.menu-toggle span:first-child{top:17px}.menu-toggle span:last-child{top:24px}

/* Hero */
.hero{
  min-height:100svh;
  position:relative;display:flex;align-items:flex-end;overflow:hidden;
  padding:150px 0 92px;
}
.hero-media{
  position:absolute;inset:0;
  background:
    url("https://images.unsplash.com/photo-1544551763-46a013bb70d5?auto=format&fit=crop&w=2000&q=88")
    center 40% / cover no-repeat;
  transform:scale(1.03);
}
.hero-shade{
  position:absolute;inset:0;
  background:
    linear-gradient(90deg,rgba(1,11,20,.94) 0%,rgba(1,11,20,.74) 42%,rgba(1,11,20,.2) 75%),
    linear-gradient(0deg,var(--bg) 0%,transparent 36%,rgba(0,0,0,.22) 100%);
}
.hero-content{position:relative;z-index:2}
.hero h1{
  font-size:clamp(3.2rem,8.5vw,7.8rem);
  max-width:980px;margin-bottom:25px;
}
.hero h1 span{color:transparent;-webkit-text-stroke:1px rgba(238,249,255,.72)}
.hero-copy{max-width:720px;color:#c8dce7;font-size:clamp(1.05rem,2vw,1.28rem)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:34px}
.hero-meta{
  display:flex;gap:32px;flex-wrap:wrap;
  margin-top:58px;color:#a8bdc8;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em
}
.hero-meta span{display:flex;flex-direction:column;gap:3px}
.hero-meta b{color:white;font-size:1rem;letter-spacing:0;text-transform:none}
.scroll-cue{
  position:absolute;right:28px;bottom:30px;z-index:2;
  display:flex;align-items:center;gap:10px;
  color:#bfd2dc;font-size:.75rem;text-transform:uppercase;letter-spacing:.14em;
  transform:rotate(90deg);transform-origin:right bottom
}
.scroll-cue span{display:block;width:42px;height:1px;background:var(--aqua)}
.hero-bubbles::before,.hero-bubbles::after{
  content:"";position:absolute;border-radius:50%;border:1px solid rgba(124,236,255,.22);z-index:1;
  animation:float 8s ease-in-out infinite
}
.hero-bubbles::before{width:100px;height:100px;right:16%;top:24%}
.hero-bubbles::after{width:28px;height:28px;right:24%;top:18%;animation-delay:-2s}
@keyframes float{50%{transform:translateY(-18px)}}

/* Courses */
.courses{background:linear-gradient(180deg,var(--bg),#061827)}
.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.course-card{
  position:relative;overflow:hidden;
  min-height:470px;padding:30px;
  background:linear-gradient(155deg,rgba(255,255,255,.07),rgba(255,255,255,.025));
  border:1px solid var(--line);border-radius:var(--radius);
  display:flex;flex-direction:column;
  transition:.3s ease
}
.course-card:hover{transform:translateY(-6px);border-color:rgba(124,236,255,.28)}
.course-card.featured{background:linear-gradient(150deg,rgba(46,230,214,.12),rgba(255,255,255,.035));border-color:rgba(46,230,214,.28)}
.course-badge{
  position:absolute;right:20px;top:20px;
  color:#001419;background:var(--aqua);padding:7px 10px;border-radius:999px;
  font-size:.65rem;font-weight:900;text-transform:uppercase;letter-spacing:.08em
}
.course-number{color:#6f8c9c;font-size:.72rem;font-weight:800;letter-spacing:.12em}
.course-icon{font-size:3rem;color:var(--aqua);margin:34px 0 22px}
.course-card h3{font-size:clamp(1.65rem,3vw,2.25rem);margin-bottom:16px}
.course-card p{color:var(--muted)}
.course-card ul{list-style:none;padding:0;margin:14px 0 28px;color:#c7d8e1;font-size:.9rem}
.course-card li{padding:8px 0;border-bottom:1px solid rgba(255,255,255,.07)}
.text-link{margin-top:auto;color:var(--aqua);font-weight:850;display:inline-flex;gap:10px}
.courses-note{color:#8fa8b8;max-width:900px;margin:30px 0 0}

/* Services */
.services{background:#041321}
.service-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.service-card{
  min-height:330px;padding:30px;border:1px solid var(--line);border-radius:var(--radius);
  background:
    linear-gradient(145deg,rgba(124,236,255,.06),transparent 55%),
    rgba(255,255,255,.025);
  display:flex;flex-direction:column;transition:.3s ease
}
.service-card:hover{transform:translateY(-5px);border-color:rgba(124,236,255,.28)}
.service-index{color:var(--aqua);font-size:.72rem;font-weight:850;letter-spacing:.14em}
.service-card h3{font-size:clamp(1.65rem,3vw,2.2rem);margin:54px 0 14px}
.service-card p{color:var(--muted);margin-bottom:28px}

/* Experience */
.experience{background:#061827}
.experience-grid{display:grid;grid-template-columns:1fr .9fr;gap:72px;align-items:center}
.experience-copy>p:not(.eyebrow){color:#aac0cc}
.benefits{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:35px}
.benefit{
  padding:18px;border:1px solid var(--line);border-radius:18px;
  display:flex;gap:13px;background:rgba(255,255,255,.025)
}
.benefit-icon{
  width:34px;height:34px;border-radius:50%;display:grid;place-items:center;flex:0 0 auto;
  background:rgba(46,230,214,.12);color:var(--aqua);font-weight:900
}
.benefit strong,.benefit small{display:block}
.benefit small{color:var(--muted);margin-top:4px;line-height:1.35}
.experience-visual{position:relative}
.experience-visual img{
  width:100%;height:650px;object-fit:cover;border-radius:32px;
  filter:saturate(.82) contrast(1.05);
  box-shadow:var(--shadow)
}
.experience-visual::before{
  content:"";position:absolute;inset:-18px 28% 28% -18px;
  border:1px solid rgba(46,230,214,.22);border-radius:32px;pointer-events:none
}
.floating-card{
  position:absolute;left:-38px;bottom:34px;width:min(320px,78%);
  background:rgba(3,17,31,.87);backdrop-filter:blur(14px);
  border:1px solid var(--line);border-radius:20px;padding:20px;
  box-shadow:var(--shadow)
}
.floating-kicker{display:block;color:var(--aqua);font-size:.7rem;text-transform:uppercase;letter-spacing:.12em;margin-bottom:7px}

/* Local */
.local{padding-top:0;background:#061827}
.local-card{
  display:grid;grid-template-columns:1.1fr 1fr auto;gap:40px;align-items:center;
  padding:36px;border:1px solid var(--line);border-radius:26px;
  background:linear-gradient(120deg,rgba(46,230,214,.07),rgba(255,255,255,.025))
}
.local-card h2{font-size:clamp(2rem,4vw,3.2rem);margin:0}
.local-card p{color:var(--muted);margin:0}

/* Gallery */
.gallery-section{background:linear-gradient(180deg,#061827,var(--bg))}
.gallery{
  display:grid;
  grid-template-columns:1.1fr .9fr .9fr;
  grid-auto-rows:270px;
  gap:12px
}
.gallery-item{
  position:relative;overflow:hidden;border:0;padding:0;border-radius:18px;
  background:var(--surface);cursor:zoom-in
}
.gallery-item img{width:100%;height:100%;object-fit:cover;transition:transform .55s ease,filter .4s ease;filter:saturate(.8)}
.gallery-item:hover img{transform:scale(1.05);filter:saturate(1)}
.gallery-item span{
  position:absolute;left:16px;bottom:16px;
  background:rgba(3,17,31,.66);backdrop-filter:blur(10px);
  border:1px solid var(--line);border-radius:999px;padding:8px 12px;
  color:white;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em
}
.gallery-tall{grid-row:span 2}
.gallery-wide{grid-column:span 2}

/* CTA */
.cta-section{
  min-height:620px;display:grid;place-items:center;position:relative;overflow:hidden;
  text-align:center
}
.cta-bg{
  position:absolute;inset:0;
  background:url("https://images.unsplash.com/photo-1530053969600-caed2596d242?auto=format&fit=crop&w=2000&q=88") center/cover;
}
.cta-overlay{position:absolute;inset:0;background:linear-gradient(rgba(2,14,25,.48),rgba(2,14,25,.86))}
.cta-content{position:relative;z-index:2;max-width:850px}
.cta-content h2{margin-inline:auto}
.cta-content p:not(.eyebrow){max-width:650px;margin:0 auto 30px;color:#c7dce7;font-size:1.1rem}

/* Contact */
.contact{background:#061827}
.contact-grid{display:grid;grid-template-columns:1fr .85fr;gap:70px;align-items:start}
.contact-data{margin:34px 0;display:grid;gap:0}
.contact-data>div{padding:17px 0;border-bottom:1px solid var(--line);display:grid;grid-template-columns:120px 1fr;gap:20px}
.contact-data span{color:#7895a6;font-size:.72rem;text-transform:uppercase;letter-spacing:.1em}
.contact-data strong,.contact-data a{font-size:1.02rem}
.contact-actions{display:flex;gap:12px;flex-wrap:wrap}
.contact-panel{padding:26px;border:1px solid var(--line);border-radius:28px;background:rgba(255,255,255,.035)}
.contact-panel-top{display:flex;gap:14px;align-items:center;margin-bottom:22px}
.contact-panel-top strong,.contact-panel-top small{display:block}
.contact-panel-top small{color:var(--muted);margin-top:4px}
.map-placeholder{
  min-height:350px;border-radius:20px;position:relative;overflow:hidden;
  background:
    radial-gradient(circle at 72% 24%,rgba(46,230,214,.16),transparent 26%),
    linear-gradient(145deg,#0c2940,#051624)
}
.map-lines{
  position:absolute;inset:-30%;
  background:
    linear-gradient(37deg,transparent 47%,rgba(124,236,255,.11) 48%,rgba(124,236,255,.11) 49%,transparent 50%),
    linear-gradient(-26deg,transparent 48%,rgba(255,255,255,.07) 49%,rgba(255,255,255,.07) 50%,transparent 51%);
  background-size:110px 130px,170px 160px;transform:rotate(8deg)
}
.map-pin{
  position:absolute;left:55%;top:42%;width:25px;height:25px;border-radius:50% 50% 50% 0;
  background:var(--aqua);transform:rotate(-45deg);box-shadow:0 0 0 9px rgba(46,230,214,.13)
}
.map-pin::after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:#053044;left:8px;top:8px}
.map-copy{
  position:absolute;left:20px;right:20px;bottom:20px;padding:18px;border-radius:16px;
  background:rgba(3,17,31,.82);backdrop-filter:blur(12px);border:1px solid var(--line)
}
.map-copy span,.map-copy strong,.map-copy a{display:block}
.map-copy span{color:var(--muted);font-size:.7rem;text-transform:uppercase;letter-spacing:.1em}
.map-copy strong{margin:4px 0 8px}
.map-copy a{color:var(--aqua);font-size:.85rem;font-weight:800}
.microcopy{font-size:.75rem;color:#7895a6;margin:12px 2px 0}

/* Footer */
.footer{padding:60px 0 26px;background:#020c15;border-top:1px solid var(--line)}
.footer-grid{display:grid;grid-template-columns:1.4fr .55fr .55fr;gap:40px}
.footer-brand p{color:var(--muted);margin:18px 0 0}
.footer-links{display:flex;flex-direction:column;gap:10px;color:#a9c0cd}
.footer-links a:hover{color:white}
.footer-bottom{
  margin-top:50px;padding-top:20px;border-top:1px solid var(--line);
  display:flex;justify-content:space-between;gap:20px;color:#668291;font-size:.76rem
}

/* WhatsApp */
.whatsapp-float{
  position:fixed;z-index:90;right:max(18px,env(safe-area-inset-right));bottom:max(18px,env(safe-area-inset-bottom));
  width:58px;height:58px;border-radius:50%;display:grid;place-items:center;
  background:#25D366;box-shadow:0 14px 35px rgba(0,0,0,.34);
  transition:.25s
}
.whatsapp-float:hover{transform:translateY(-4px) scale(1.03)}
.whatsapp-float svg{width:28px;fill:white}

/* Lightbox */
.lightbox{
  width:min(92vw,1100px);height:min(88vh,800px);padding:0;border:0;border-radius:22px;
  background:#020b13;box-shadow:var(--shadow);overflow:hidden
}
.lightbox::backdrop{background:rgba(0,5,10,.88);backdrop-filter:blur(7px)}
.lightbox img{width:100%;height:100%;object-fit:contain}
.lightbox-close{
  position:absolute;z-index:2;right:12px;top:12px;width:44px;height:44px;
  border:1px solid rgba(255,255,255,.18);border-radius:50%;
  color:white;background:rgba(0,0,0,.44);font-size:1.7rem;cursor:pointer
}

/* Scroll animations */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
}

/* Tablet */
@media (max-width:900px){
  .section{padding:84px 0}
  .menu-toggle{display:block;z-index:102}
  .site-menu{
    position:fixed;inset:0;z-index:101;
    display:flex;flex-direction:column;align-items:flex-start;justify-content:center;
    padding:80px 28px;
    background:rgba(3,17,31,.97);backdrop-filter:blur(18px);
    transform:translateX(100%);transition:transform .3s ease;
    font-size:1.6rem
  }
  .site-menu.open{transform:translateX(0)}
  .site-menu .nav-cta{font-size:1rem;margin-top:18px}
  .menu-toggle[aria-expanded="true"] span:first-child{top:21px;transform:rotate(45deg)}
  .menu-toggle[aria-expanded="true"] span:last-child{top:21px;transform:rotate(-45deg)}
  .course-grid{grid-template-columns:1fr}
  .service-grid{grid-template-columns:1fr}
  .service-card{min-height:auto}
  .course-card{min-height:auto}
  .experience-grid{grid-template-columns:1fr;gap:48px}
  .experience-visual img{height:560px}
  .floating-card{left:16px}
  .local-card{grid-template-columns:1fr;gap:24px}
  .local-card .btn{justify-self:start}
  .section-heading.split{grid-template-columns:1fr;gap:10px}
  .gallery{grid-template-columns:1fr 1fr;grid-auto-rows:240px}
  .gallery-tall{grid-row:span 2}
  .gallery-wide{grid-column:span 2}
  .contact-grid{grid-template-columns:1fr}
}

/* Mobile */
@media (max-width:620px){
  .container{width:min(calc(100% - 28px),var(--container))}
  .section{padding:70px 0}
  .site-header{padding-top:max(11px,env(safe-area-inset-top))}
  .brand-copy small{display:none}
  .brand-logo{width:174px;height:48px}
  .brand-logo-panel{width:min(100%,310px);height:auto}
  .brand-logo-footer{width:230px;height:auto}
  .hero{padding:135px 0 52px;align-items:flex-end}
  .hero-media{background-position:58% center}
  .hero-shade{
    background:
      linear-gradient(0deg,var(--bg) 0%,rgba(2,12,22,.82) 44%,rgba(2,12,22,.2) 100%),
      linear-gradient(90deg,rgba(2,12,22,.55),transparent)
  }
  .hero h1{font-size:clamp(3rem,15vw,5.1rem);margin-bottom:20px}
  .hero-copy{font-size:1rem}
  .hero-actions{display:grid}
  .hero-actions .btn{width:100%}
  .hero-meta{margin-top:38px;display:grid;grid-template-columns:1fr 1fr;gap:18px}
  .hero-meta span:last-child{grid-column:1/-1}
  .scroll-cue{display:none}
  h2{font-size:clamp(2.3rem,12vw,3.6rem)}
  .section-heading{margin-bottom:34px}
  .course-card{padding:24px;border-radius:20px}
  .service-card{padding:24px;border-radius:20px}
  .service-card h3{margin-top:32px}
  .course-icon{margin:24px 0 18px}
  .benefits{grid-template-columns:1fr}
  .experience-visual img{height:460px;border-radius:22px}
  .experience-visual::before{display:none}
  .floating-card{bottom:14px;left:14px}
  .local-card{padding:24px;border-radius:20px}
  .gallery{grid-template-columns:1fr;grid-auto-rows:260px}
  .gallery-tall{grid-row:span 1}
  .gallery-wide{grid-column:span 1}
  .cta-section{min-height:560px}
  .cta-content .btn{width:100%}
  .contact-data>div{grid-template-columns:1fr;gap:5px}
  .contact-actions{display:grid}
  .contact-actions .btn{width:100%}
  .contact-panel{padding:18px}
  .map-placeholder{min-height:320px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .footer-bottom{flex-direction:column}
  .whatsapp-float{width:54px;height:54px}
}