/* ============================================================
   PiedraNube — Sesiones de música en vivo
   Paleta: navy #293B50 · navy oscuro #1E2C3D · crema #F2E3C6
           dorado #D6B366 · vino #B84A4A
   ============================================================ */

:root{
  --navy:#293B50;
  --navy-osc:#1E2C3D;
  --navy-negro:#16222F;
  --crema:#F2E3C6;
  --crema-suave:#F7EEDC;
  --dorado:#D6B366;
  --dorado-claro:#E6CD92;
  --vino:#B84A4A;
  --tinta:#22303F;
  --gris:#5B6B7A;
  --serif:'Fraunces', Georgia, 'Times New Roman', serif;
  --sans:'Inter', -apple-system, 'Segoe UI', sans-serif;
  --ancho:1140px;
  --radio:14px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--sans);
  color:var(--tinta);
  background:var(--crema-suave);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
.contenedor{max-width:var(--ancho);margin:0 auto;padding:0 24px}

h1,h2,h3,.serif{font-family:var(--serif);font-weight:600;line-height:1.15;letter-spacing:-.01em}

/* ---------- Barra sticky ---------- */
.barra{
  position:sticky;top:0;z-index:100;
  background:rgba(30,44,61,.92);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid rgba(214,179,102,.25);
}
.barra-interna{
  display:flex;align-items:center;gap:18px;
  padding:12px 24px;max-width:var(--ancho);margin:0 auto;
}
.barra .logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.barra .logo img{height:44px;width:auto}
.barra .logo span{
  font-family:var(--serif);color:var(--crema);font-size:1.05rem;
  letter-spacing:.14em;text-transform:uppercase;
}
.nav{margin-left:auto;display:flex;align-items:center;gap:26px}
.nav a{
  color:var(--crema);text-decoration:none;font-size:.92rem;font-weight:500;
  letter-spacing:.04em;opacity:.85;transition:opacity .2s,color .2s;
}
.nav a:hover{opacity:1;color:var(--dorado)}
.nav a.activo{color:var(--dorado);opacity:1}
.nav .proxima{
  font-size:.8rem;color:var(--dorado);letter-spacing:.08em;text-transform:uppercase;
  border-left:1px solid rgba(214,179,102,.35);padding-left:18px;opacity:1;
}
.btn{
  display:inline-block;font-family:var(--sans);font-weight:600;font-size:.95rem;
  letter-spacing:.05em;text-transform:uppercase;text-decoration:none;cursor:pointer;
  padding:14px 30px;border-radius:50px;border:2px solid transparent;
  transition:transform .2s,box-shadow .2s,background .2s,color .2s;
}
.btn:hover{transform:translateY(-2px)}
.btn-vino{background:var(--vino);color:var(--crema-suave)}
.btn-vino:hover{background:#a53f3f;box-shadow:0 8px 24px rgba(184,74,74,.35)}
.btn-contorno{border-color:var(--crema);color:var(--crema);background:transparent}
.btn-contorno:hover{background:var(--crema);color:var(--navy)}
.btn-dorado{background:var(--dorado);color:var(--navy-osc)}
.btn-dorado:hover{background:var(--dorado-claro);box-shadow:0 8px 24px rgba(214,179,102,.35)}
.btn-chico{padding:10px 22px;font-size:.82rem}
.menu-toggle{
  display:none;background:none;border:0;cursor:pointer;margin-left:auto;
  width:42px;height:42px;position:relative;
}
.menu-toggle span{
  display:block;width:24px;height:2px;background:var(--crema);margin:5px auto;
  transition:transform .25s,opacity .25s;
}
body.nav-open .menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg)}
body.nav-open .menu-toggle span:nth-child(2){opacity:0}
body.nav-open .menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(ellipse 80% 60% at 50% -10%, rgba(214,179,102,.14), transparent 60%),
    linear-gradient(180deg, var(--navy) 0%, var(--navy-osc) 78%, var(--navy-negro) 100%);
  color:var(--crema);
  padding:88px 24px 96px;
  text-align:center;
  position:relative;
  overflow:hidden;
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 40% at 85% 100%, rgba(184,74,74,.12), transparent 65%);
}
.hero .logo-hero{width:min(340px,64vw);margin:0 auto 8px;filter:drop-shadow(0 18px 40px rgba(0,0,0,.35))}
.hero .kicker{
  font-size:.82rem;letter-spacing:.3em;text-transform:uppercase;color:var(--dorado);
  margin-bottom:14px;font-weight:600;
}
.hero h1{
  font-size:clamp(2.6rem,6.5vw,4.6rem);color:var(--crema-suave);
  font-variation-settings:'opsz' 100;margin-bottom:18px;
}
.hero h1 em{font-style:italic;color:var(--dorado)}
.hero .sub{
  max-width:620px;margin:0 auto 38px;font-size:1.12rem;color:rgba(242,227,198,.82);
}
.hero .ctas{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero .scroll-hint{
  margin-top:56px;font-size:.75rem;letter-spacing:.25em;text-transform:uppercase;
  color:rgba(242,227,198,.5);
}

/* ---------- Secciones genéricas ---------- */
.seccion{padding:96px 0}
.seccion-oscura{background:var(--navy-osc);color:var(--crema)}
.seccion .kicker{
  font-size:.78rem;letter-spacing:.3em;text-transform:uppercase;
  color:var(--vino);font-weight:700;margin-bottom:12px;
}
.seccion-oscura .kicker{color:var(--dorado)}
.seccion h2{font-size:clamp(1.9rem,4vw,2.9rem);margin-bottom:20px}
.seccion .intro{max-width:640px;font-size:1.06rem;color:var(--gris)}
.seccion-oscura .intro{color:rgba(242,227,198,.78)}
.cabecera-centro{text-align:center}
.cabecera-centro .intro{margin:0 auto}

/* ---------- Próxima sesión ---------- */
.fecha-grande{
  font-family:var(--serif);font-size:clamp(2.2rem,5vw,3.6rem);
  line-height:1.05;color:var(--navy-osc);margin-bottom:6px;
}
.fecha-grande strong{color:var(--vino)}
.proxima-grid{
  display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center;
}
.datos-sesion{list-style:none;margin:26px 0 30px;display:grid;gap:12px}
.datos-sesion li{
  display:flex;gap:12px;align-items:baseline;font-size:1.04rem;
  padding-bottom:12px;border-bottom:1px dashed rgba(34,48,63,.18);
}
.datos-sesion li b{
  font-size:.78rem;letter-spacing:.18em;text-transform:uppercase;
  color:var(--vino);min-width:110px;font-weight:700;
}
.countdown{display:flex;gap:14px;margin:28px 0 8px;flex-wrap:wrap}
.countdown .celda{
  background:var(--navy);color:var(--crema);border-radius:var(--radio);
  min-width:88px;padding:16px 10px;text-align:center;
  box-shadow:0 10px 30px rgba(30,44,61,.22);
}
.countdown .celda b{font-family:var(--serif);font-size:2rem;display:block;line-height:1;color:var(--dorado)}
.countdown .celda small{font-size:.68rem;letter-spacing:.2em;text-transform:uppercase;opacity:.7}
.badge-sponsor{
  display:inline-flex;align-items:center;gap:8px;margin-top:22px;
  background:rgba(214,179,102,.16);border:1px solid rgba(214,179,102,.5);
  color:#8a6d2f;font-size:.85rem;font-weight:600;letter-spacing:.04em;
  padding:9px 18px;border-radius:50px;
}
.mapa{
  border-radius:var(--radio);overflow:hidden;
  box-shadow:0 24px 60px rgba(30,44,61,.25);border:6px solid #fff;
}
.mapa iframe{width:100%;height:380px;border:0;display:block}

/* ---------- Pilares ---------- */
.pilares{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:52px}
.pilar{
  background:rgba(242,227,198,.05);
  border:1px solid rgba(214,179,102,.28);
  border-radius:var(--radio);padding:38px 30px;
  transition:transform .25s,border-color .25s,background .25s;
}
.pilar:hover{transform:translateY(-6px);border-color:var(--dorado);background:rgba(242,227,198,.08)}
.pilar .num{
  font-family:var(--serif);font-size:.95rem;color:var(--dorado);
  letter-spacing:.2em;margin-bottom:16px;
}
.pilar h3{font-size:1.35rem;color:var(--crema-suave);margin-bottom:12px}
.pilar p{color:rgba(242,227,198,.72);font-size:.98rem}

/* ---------- Sesión #1 / video ---------- */
.video-marco{
  border-radius:var(--radio);overflow:hidden;
  box-shadow:0 24px 60px rgba(30,44,61,.3);
  border:6px solid #fff;background:var(--navy);
}
.video-marco iframe{width:100%;aspect-ratio:16/9;border:0;display:block}
.video-placeholder{
  display:flex;flex-direction:column;align-items:center;justify-content:center;
  gap:18px;aspect-ratio:16/9;color:var(--crema);text-align:center;padding:32px;
  background:
    radial-gradient(ellipse 70% 80% at 50% 0%, rgba(214,179,102,.16), transparent 60%),
    var(--navy);
  text-decoration:none;
}
.video-placeholder .play{
  width:76px;height:76px;border-radius:50%;background:var(--vino);
  display:flex;align-items:center;justify-content:center;
  transition:transform .25s,background .25s;
}
.video-placeholder:hover .play{transform:scale(1.1);background:#a53f3f}
.video-placeholder .play svg{margin-left:5px}
.video-placeholder p{font-family:var(--serif);font-size:1.3rem;color:var(--crema-suave)}
.video-placeholder small{letter-spacing:.2em;text-transform:uppercase;font-size:.72rem;color:var(--dorado)}
.sesion-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.ficha-artista{
  margin-top:20px;padding:20px 24px;border-left:3px solid var(--vino);
  background:rgba(184,74,74,.06);border-radius:0 var(--radio) var(--radio) 0;
}
.ficha-artista b{font-family:var(--serif);font-size:1.15rem;color:var(--navy-osc)}

/* ---------- Artistas ---------- */
.grid-artistas{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-top:52px}
.tarjeta-artista{
  background:#fff;border-radius:var(--radio);overflow:hidden;
  box-shadow:0 14px 40px rgba(30,44,61,.12);
  transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;
}
.tarjeta-artista:hover{transform:translateY(-6px);box-shadow:0 24px 60px rgba(30,44,61,.2)}
.tarjeta-artista .foto{
  aspect-ratio:4/3.4;display:flex;align-items:flex-end;justify-content:center;
  padding:26px 26px 0;position:relative;overflow:hidden;
}
.foto-navy{background:radial-gradient(ellipse 90% 90% at 50% 0%, #33475f, var(--navy-osc))}
.foto-vino{background:radial-gradient(ellipse 90% 90% at 50% 0%, #8f3d3d, #5e2828)}
.foto-dorado{background:radial-gradient(ellipse 90% 90% at 50% 0%, var(--dorado), #a8873f)}
.tarjeta-artista .foto img{width:62%;filter:drop-shadow(0 10px 24px rgba(0,0,0,.35))}
.foto-dorado img{filter:none}
.tarjeta-artista .cuerpo{padding:24px 26px 28px;flex:1;display:flex;flex-direction:column}
.tarjeta-artista .estado{
  align-self:flex-start;font-size:.68rem;font-weight:700;letter-spacing:.18em;
  text-transform:uppercase;padding:5px 12px;border-radius:50px;margin-bottom:14px;
}
.estado-proximo{background:rgba(184,74,74,.12);color:var(--vino)}
.estado-pasado{background:rgba(41,59,80,.1);color:var(--navy)}
.tarjeta-artista h3{font-size:1.4rem;color:var(--navy-osc);margin-bottom:6px}
.tarjeta-artista .genero{font-size:.85rem;color:var(--vino);font-weight:600;letter-spacing:.06em;text-transform:uppercase;margin-bottom:12px}
.tarjeta-artista p{font-size:.95rem;color:var(--gris);flex:1}

/* ---------- Sponsors home ---------- */
.sponsor-actual{
  display:flex;flex-direction:column;align-items:center;text-align:center;gap:10px;
  background:#fff;border-radius:var(--radio);padding:44px 32px;
  box-shadow:0 14px 40px rgba(30,44,61,.12);max-width:460px;margin:48px auto 0;
}
.sponsor-actual .nombre{font-family:var(--serif);font-size:2rem;color:var(--navy-osc)}
.sponsor-actual .detalle{color:var(--gris);font-size:.95rem;max-width:320px}
.sponsor-actual .tag{
  font-size:.7rem;letter-spacing:.22em;text-transform:uppercase;color:var(--vino);font-weight:700;
}
.slots{display:flex;gap:18px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.slot{
  border:2px dashed rgba(34,48,63,.25);border-radius:var(--radio);
  padding:20px 34px;color:var(--gris);font-size:.85rem;letter-spacing:.12em;
  text-transform:uppercase;
}
.cta-centro{text-align:center;margin-top:44px}

/* ---------- Newsletter ---------- */
.newsletter{
  background:linear-gradient(135deg, var(--navy) 0%, var(--navy-negro) 100%);
  color:var(--crema);text-align:center;border-radius:22px;
  padding:64px 32px;position:relative;overflow:hidden;
}
.newsletter::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 50% 60% at 15% 110%, rgba(214,179,102,.15), transparent 60%);
}
.newsletter h2{color:var(--crema-suave)}
.newsletter p{color:rgba(242,227,198,.75);max-width:460px;margin:0 auto 30px}
.form-newsletter{display:flex;gap:12px;max-width:480px;margin:0 auto;flex-wrap:wrap;justify-content:center}
.form-newsletter input{
  flex:1;min-width:220px;padding:15px 22px;border-radius:50px;border:1px solid rgba(214,179,102,.4);
  background:rgba(242,227,198,.08);color:var(--crema);font-size:1rem;font-family:var(--sans);
}
.form-newsletter input::placeholder{color:rgba(242,227,198,.5)}
.form-newsletter input:focus{outline:2px solid var(--dorado);outline-offset:2px}
.form-nota{font-size:.8rem;color:rgba(242,227,198,.5);margin-top:16px}
.form-ok{
  display:none;margin:10px auto 0;max-width:480px;background:rgba(214,179,102,.15);
  border:1px solid var(--dorado);color:var(--dorado-claro);
  padding:14px 22px;border-radius:50px;font-weight:600;
}
.form-ok.visible{display:block}
.redes{display:flex;gap:18px;justify-content:center;margin-top:36px}
.redes a{
  width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  border:1px solid rgba(214,179,102,.4);color:var(--dorado);
  transition:background .25s,color .25s,transform .25s;
}
.redes a:hover{background:var(--dorado);color:var(--navy-osc);transform:translateY(-3px)}

/* ---------- Footer ---------- */
footer{background:var(--navy-negro);color:rgba(242,227,198,.7);padding:64px 0 32px}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:44px;margin-bottom:44px}
.footer-grid img{width:130px;margin-bottom:16px}
.footer-grid h4{
  font-family:var(--sans);font-size:.75rem;letter-spacing:.24em;text-transform:uppercase;
  color:var(--dorado);margin-bottom:16px;font-weight:700;
}
.footer-grid ul{list-style:none;display:grid;gap:10px}
.footer-grid a{text-decoration:none;transition:color .2s}
.footer-grid a:hover{color:var(--dorado)}
.footer-tag{font-family:var(--serif);font-size:1.15rem;color:var(--crema);font-style:italic}
.footer-base{
  border-top:1px solid rgba(214,179,102,.2);padding-top:26px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:.82rem;
  color:rgba(242,227,198,.45);
}

/* ---------- Páginas internas ---------- */
.cabecera-pagina{
  background:linear-gradient(180deg, var(--navy) 0%, var(--navy-osc) 100%);
  color:var(--crema);padding:80px 0 70px;text-align:center;
}
.cabecera-pagina h1{font-size:clamp(2.2rem,5vw,3.4rem);color:var(--crema-suave)}
.cabecera-pagina p{max-width:600px;margin:16px auto 0;color:rgba(242,227,198,.78);font-size:1.08rem}

/* Sesiones: archivo */
.archivo{display:grid;grid-template-columns:repeat(2,1fr);gap:32px;margin-top:52px}
.tarjeta-sesion{
  background:#fff;border-radius:var(--radio);overflow:hidden;
  box-shadow:0 14px 40px rgba(30,44,61,.12);transition:transform .25s;
}
.tarjeta-sesion:hover{transform:translateY(-6px)}
.tarjeta-sesion .portada{
  aspect-ratio:16/9;display:flex;align-items:center;justify-content:center;
  flex-direction:column;gap:8px;color:var(--crema);text-align:center;padding:24px;
}
.portada .edicion{font-size:.72rem;letter-spacing:.3em;text-transform:uppercase;color:var(--dorado);font-weight:700}
.portada .nombre{font-family:var(--serif);font-size:2rem}
.portada .fecha{font-size:.9rem;opacity:.75}
.tarjeta-sesion .cuerpo{padding:26px 30px 30px}
.tarjeta-sesion .cuerpo p{color:var(--gris);font-size:.96rem;margin-bottom:18px}
.creditos{list-style:none;font-size:.85rem;color:var(--gris);display:grid;gap:6px;margin-bottom:20px}
.creditos b{color:var(--tinta)}

/* Sponsors página */
.niveles{display:grid;grid-template-columns:repeat(2,1fr);gap:26px;margin-top:48px}
.nivel{
  background:#fff;border-radius:var(--radio);padding:36px 32px;
  box-shadow:0 14px 40px rgba(30,44,61,.1);border-top:5px solid var(--dorado);
  display:flex;flex-direction:column;
}
.nivel.destacado{border-top-color:var(--vino)}
.nivel h3{font-size:1.3rem;color:var(--navy-osc)}
.nivel .aporte{font-family:var(--serif);font-size:1.05rem;color:var(--vino);margin:8px 0 16px}
.nivel ul{list-style:none;display:grid;gap:9px;font-size:.93rem;color:var(--gris);flex:1}
.nivel ul li{padding-left:22px;position:relative}
.nivel ul li::before{
  content:"";position:absolute;left:0;top:.55em;width:9px;height:9px;border-radius:50%;
  background:var(--dorado);
}
.datos-publico{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:48px}
.dato{
  text-align:center;background:rgba(242,227,198,.05);
  border:1px solid rgba(214,179,102,.28);border-radius:var(--radio);padding:34px 22px;
}
.dato b{font-family:var(--serif);font-size:2rem;color:var(--dorado);display:block;margin-bottom:8px}
.dato span{font-size:.9rem;color:rgba(242,227,198,.75)}

/* Formularios */
.form-contacto{display:grid;gap:18px;max-width:640px}
.form-fila{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.campo label{
  display:block;font-size:.78rem;font-weight:700;letter-spacing:.16em;
  text-transform:uppercase;color:var(--navy);margin-bottom:8px;
}
.campo input,.campo select,.campo textarea{
  width:100%;padding:15px 18px;border-radius:12px;border:1.5px solid rgba(34,48,63,.2);
  background:#fff;font-size:1rem;font-family:var(--sans);color:var(--tinta);
  transition:border-color .2s,box-shadow .2s;
}
.campo input:focus,.campo select:focus,.campo textarea:focus{
  outline:none;border-color:var(--vino);box-shadow:0 0 0 4px rgba(184,74,74,.12);
}
.campo textarea{min-height:150px;resize:vertical}
.contacto-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:52px;align-items:start}
.tarjeta-info{
  background:#fff;border-radius:var(--radio);padding:32px;
  box-shadow:0 14px 40px rgba(30,44,61,.1);display:grid;gap:22px;
}
.tarjeta-info .item{display:flex;gap:16px;align-items:flex-start}
.tarjeta-info .icono{
  width:46px;height:46px;border-radius:12px;flex-shrink:0;
  background:rgba(214,179,102,.18);color:#8a6d2f;
  display:flex;align-items:center;justify-content:center;
}
.tarjeta-info b{display:block;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;color:var(--vino);margin-bottom:4px}
.tarjeta-info p,.tarjeta-info a{font-size:.98rem;color:var(--tinta);text-decoration:none}
.tarjeta-info a:hover{color:var(--vino)}
.alerta{
  max-width:640px;margin-bottom:26px;padding:16px 22px;border-radius:12px;font-weight:600;
}
.alerta-ok{background:rgba(76,140,74,.12);border:1px solid rgba(76,140,74,.5);color:#3c6b3a}
.alerta-error{background:rgba(184,74,74,.1);border:1px solid rgba(184,74,74,.5);color:var(--vino)}

/* CTA final páginas internas */
.cta-final{
  background:linear-gradient(135deg, var(--navy) 0%, var(--navy-negro) 100%);
  color:var(--crema);text-align:center;padding:84px 24px;
}
.cta-final h2{color:var(--crema-suave);font-size:clamp(1.9rem,4vw,2.8rem);margin-bottom:16px}
.cta-final p{color:rgba(242,227,198,.75);max-width:520px;margin:0 auto 32px}

/* ---------- Animaciones ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .proxima-grid,.sesion-grid,.contacto-grid{grid-template-columns:1fr;gap:40px}
  .pilares,.grid-artistas,.datos-publico{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .niveles,.archivo{grid-template-columns:1fr}
}
@media (max-width:720px){
  .nav .proxima{display:none}
  .menu-toggle{display:block}
  .nav{
    position:fixed;inset:68px 0 auto 0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--navy-osc);padding:12px 24px 26px;margin:0;
    border-bottom:1px solid rgba(214,179,102,.3);
    transform:translateY(-130%);transition:transform .3s ease;z-index:99;
  }
  body.nav-open .nav{transform:none}
  .nav a{padding:15px 4px;border-bottom:1px solid rgba(242,227,198,.1);font-size:1.05rem}
  .nav .btn{margin-top:16px;text-align:center}
  .pilares,.grid-artistas,.datos-publico{grid-template-columns:1fr}
  .form-fila{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .seccion{padding:70px 0}
  .countdown .celda{min-width:70px;padding:12px 8px}
  .countdown .celda b{font-size:1.5rem}
}