/* === Proyecto final: estilos modernos y accesibles === */
:root{
  --maxw: 1200px;
  --bg: linear-gradient(180deg,#f8fbff 0%, #ffffff 100%);
  --accent-1: linear-gradient(90deg,#6ee7b7,#3b82f6);
  --muted: #6b7280;
  --radius-xl: 1rem;
  --shadow-soft: 0 12px 30px rgba(16,24,40,.08);
  --glass: rgba(255,255,255,.6);
}

/* Global */
*{box-sizing:border-box}
html{font-family:Inter, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial; -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;}
body{margin:0;background:var(--bg);color:#0f172a;line-height:1.5;min-height:100vh;transition:background .3s ease}
.container{width:min(100% - 2rem,var(--maxw));margin:0 auto;padding-inline:1rem}

/* Typography */
h1,h2,h3{margin:0 0 .5rem;color:#071032;font-weight:600}
p{margin:0 0 1rem;color:var(--muted)}

/* Top nav */
.header{background:transparent;padding:block .75rem 1rem;position:sticky;top:0;z-index:50;backdrop-filter: blur(6px);}
.navbar{display:flex;align-items:center;justify-content:space-between;gap:1rem}
.nav-brand{font-weight:700;letter-spacing:-.3px}
.nav-list{display:flex;gap:1rem;align-items:center;list-style:none;padding:0;margin:0}
.nav-list a{display:inline-flex;padding:.5rem .75rem;border-radius:.75rem;text-decoration:none;color:inherit}
.nav-toggle{display:none;border:0;background:linear-gradient(180deg,#fff,#f6f9ff);padding:.5rem .75rem;border-radius:.75rem;box-shadow:var(--shadow-soft);cursor:pointer}
@media (max-width:768px){
  .nav-toggle{display:inline-flex}
  .nav-list{display:none;position:absolute;right:1rem;top:64px;flex-direction:column;background:var(--glass);backdrop-filter:blur(6px);padding:1rem;border-radius:.75rem;box-shadow:var(--shadow-soft)}
  .navbar.open .nav-list{display:flex}
}

/* Hero */
.hero{display:grid;grid-template-columns:1fr 480px;gap:2rem;align-items:center;padding: clamp(2rem, 6vw, 6rem) 0}
@media (max-width:1024px){ .hero{grid-template-columns:1fr} }

.card{background:#fff;border-radius:var(--radius-xl);overflow:hidden;box-shadow:var(--shadow-soft);padding:1rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.65rem 1rem;border-radius:.75rem;border:0;cursor:pointer;font-weight:600;background:var(--accent-1);color:#fff;box-shadow:0 8px 20px rgba(59,130,246,.12);transition:transform .18s ease, box-shadow .18s ease}
.btn:active{transform:translateY(1px)}

/* Sections spacing */
.section{padding-block: clamp(2rem, 2vw + 1rem, 5rem)}

/* Gallery modern grid */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:1rem}
.gallery figure{margin:0;border-radius:.75rem;overflow:hidden;background:linear-gradient(180deg,#fff,#fbfdff);box-shadow:var(--shadow-soft);position:relative}
.gallery img{display:block;width:100%;height:160px;object-fit:cover;transition:transform .35s ease, filter .35s ease}
.gallery figure:hover img{transform:scale(1.03) translateY(-4px)}

/* Caption overlay */
.gallery figcaption{position:absolute;inset:auto 0 0 0;padding:.5rem .75rem;background:linear-gradient(180deg,transparent,rgba(2,6,23,.6));color:#fff;font-size:.95rem}

/* Lightbox styles */
.lightbox-overlay{position:fixed;inset:0;display:none;place-items:center;background:rgba(2,6,23,.85);z-index:9999;padding:3vh}
.lightbox-overlay.open{display:grid}
.lightbox-overlay img{max-width:92vw;max-height:84vh;border-radius:.75rem;box-shadow:0 30px 60px rgba(2,6,23,.6)}
.lightbox-controls{position:absolute;top:50%;transform:translateY(-50%);display:flex;gap:.5rem;align-items:center;width:100%;justify-content:space-between;padding:0 4vw}
.lightbox-btn{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(6px);padding:.5rem .65rem;border-radius:.75rem;color:#fff;cursor:pointer}

/* Animations */
[aria-hidden="true"]{pointer-events:none}
.reveal{opacity:0;transform:translateY(18px) scale(.995);transition:opacity .7s cubic-bezier(.2,.9,.3,1),transform .7s cubic-bezier(.2,.9,.3,1)}
.reveal.is-visible{opacity:1;transform:none}

/* Variants */
.anim-fade-up{opacity:0;transform:translateY(20px);transition:all .7s ease}
.anim-fade-up.is-visible{opacity:1;transform:none}
.anim-zoom{opacity:0;transform:scale(.94);transition:all .6s ease}
.anim-zoom.is-visible{opacity:1;transform:scale(1)}
.anim-slide-left{opacity:0;transform:translateX(18px);transition:all .7s ease}
.anim-slide-left.is-visible{opacity:1;transform:none}

/* Accessibility focus */
:focus{outline:3px solid rgba(59,130,246,.18);outline-offset:3px;border-radius:.5rem}

/* Responsive tweaks */
@media (max-width:768px){
  .hero{padding:2rem 0}
  .gallery img{height:120px}
  .lightbox-controls{padding:0 2rem}
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important;scroll-behavior:auto!important}}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* Overlay de transición sutil */
.page-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  opacity: 0;
  pointer-events: none;
  z-index: 9999;
  transition: opacity 0.6s ease;
}
.page-overlay.active {
  opacity: 1;
  pointer-events: all;
}