:root {
  --azul: #32a2d7;
  --azul-claro: #67c9f1;
  --azul-oscuro: #216c8f;
  --azul-profundo: #113648;
  --gris: #808080;
  --gris-oscuro: #404040;
  --negro: #000;
  --blanco: #fff;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Lato', sans-serif; color: var(--negro); background: var(--blanco); line-height: 1.5; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.contenedor { width: 100%; max-width: 980px; margin: 0 auto; padding: 0 16px; }

/* ---------- Encabezado ---------- */
header { background: var(--blanco); position: sticky; top: 0; z-index: 50; box-shadow: 0 1px 6px rgba(0,0,0,.08); }
.cabecera { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 10px 16px; max-width: 980px; margin: 0 auto; }
.marca { display: flex; align-items: center; gap: 14px; }
.marca .logo { width: 92px; height: 92px; }
.marca .titulo { width: 294px; }
.btn-menu { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.btn-menu span { display: block; width: 26px; height: 2px; background: var(--negro); margin: 6px 0; transition: .3s; }

nav { background: var(--blanco); border-top: 1px solid #eee; }
nav > ul { list-style: none; display: flex; justify-content: center; flex-wrap: wrap; max-width: 980px; margin: 0 auto; }
nav li { position: relative; }
nav > ul > li > a { display: block; padding: 12px 10px; font-family: 'Oswald', sans-serif; font-weight: 300; font-size: 14px; letter-spacing: .05em; color: var(--negro); transition: color .2s; }
nav > ul > li > a:hover, nav > ul > li > a.activo { color: var(--azul); }
nav .sub { list-style: none; position: absolute; top: 100%; left: 0; min-width: 240px; background: var(--blanco); box-shadow: 0 4px 14px rgba(0,0,0,.12); opacity: 0; visibility: hidden; transform: translateY(6px); transition: .2s; z-index: 60; }
nav li:hover > .sub, nav li:focus-within > .sub { opacity: 1; visibility: visible; transform: none; }
nav .sub a { display: block; padding: 9px 16px; font-family: 'Oswald', sans-serif; font-weight: 300; font-size: 14px; color: var(--gris-oscuro); }
nav .sub a:hover { background: var(--azul); color: var(--blanco); }

/* ---------- Portada con video ---------- */
.portada { position: relative; overflow: hidden; padding: 50px 16px 60px; text-align: center; }
.portada video, .portada .poster { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -1; }
.portada .poster { background: url(img/hero.jpg) center/cover; z-index: -2; }
.invitacion { display: inline-block; max-width: 635px; width: 100%; box-shadow: 0 10px 30px rgba(0,0,0,.25); transition: transform .3s; }
.invitacion:hover { transform: scale(1.02); }
.portada .aviso { margin-top: 18px; font-family: 'Oswald', sans-serif; font-weight: 400; font-size: 20px; color: var(--blanco); text-shadow: 0 1px 4px rgba(0,0,0,.45); }
.portada .aviso a { text-decoration: underline; }

/* ---------- ¿Necesitas la solución? ---------- */
.solucion { background: url(img/fondo2.png) center/cover no-repeat; padding: 60px 0; text-align: center; }
.solucion h2 { font-family: 'Oswald', sans-serif; font-weight: 300; font-size: 30px; letter-spacing: .04em; margin-bottom: 34px; }
.botones { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.boton { display: flex; align-items: center; justify-content: center; min-height: 64px; padding: 10px 14px; background: var(--azul); color: var(--blanco); font-family: 'Oswald', sans-serif; font-weight: 400; font-size: 15px; letter-spacing: .06em; transition: background .25s; }
.boton:hover { background: var(--azul-oscuro); }

/* ---------- El programa ---------- */
.programa-titulo { background: url(img/lineas.jpg) center/cover; padding: 44px 16px; text-align: center; }
.programa-titulo h3 { font-family: 'Oswald', sans-serif; font-weight: 300; font-size: 18px; letter-spacing: .3em; color: var(--gris); }
.programa-titulo h2 { font-family: 'Oswald', sans-serif; font-weight: 400; font-size: 40px; letter-spacing: .08em; color: var(--azul); }

.tarjetas { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; padding: 50px 0 60px; }
.tarjeta { display: flex; flex-direction: column; background: var(--blanco); border: 1px solid #e6e6e6; }
.tarjeta .foto { aspect-ratio: 286 / 335; overflow: hidden; background: var(--azul); }
.tarjeta .foto img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.tarjeta:hover .foto img { transform: scale(1.06); }
.tarjeta .foto.texto { display: flex; flex-direction: column; align-items: center; justify-content: center; color: var(--blanco); background: linear-gradient(160deg, var(--azul-claro), var(--azul-oscuro)); font-family: 'Oswald', sans-serif; text-align: center; }
.tarjeta .foto.texto .grande { font-size: 22px; font-weight: 300; letter-spacing: .15em; }
.tarjeta .foto.texto .num { font-size: 76px; font-weight: 500; line-height: 1; }
.tarjeta .cuerpo { flex: 1; display: flex; flex-direction: column; padding: 20px 18px 22px; text-align: center; }
.tarjeta h4 { font-family: 'Oswald', sans-serif; font-weight: 400; font-size: 20px; letter-spacing: .05em; margin-bottom: 10px; }
.tarjeta p { font-size: 14px; color: var(--gris-oscuro); font-weight: 300; flex: 1; }
.tarjeta ul { list-style: none; font-size: 14px; color: var(--gris-oscuro); font-weight: 300; flex: 1; }
.tarjeta ul li { padding: 2px 0; }
.info { align-self: center; margin-top: 18px; padding: 7px 30px; border: 1px solid var(--azul); color: var(--azul); font-family: 'Oswald', sans-serif; letter-spacing: .12em; font-size: 14px; transition: .25s; }
.info:hover { background: var(--azul); color: var(--blanco); }

/* ---------- Franja reuniones ---------- */
.franja { background: var(--azul); }
.franja .contenedor { display: grid; grid-template-columns: repeat(3, 1fr); }
.franja a { display: flex; flex-direction: column; align-items: center; gap: 10px; padding: 34px 10px; color: var(--blanco); font-family: 'Oswald', sans-serif; font-size: 20px; letter-spacing: .1em; text-align: center; transition: background .25s; }
.franja a:hover { background: var(--azul-oscuro); }
.franja svg { width: 38px; height: 38px; }

/* ---------- Pie de página ---------- */
footer { background: var(--azul-profundo); color: var(--blanco); padding: 54px 0 30px; }
.pie { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; text-align: center; }
.pie h5 { font-family: 'Oswald', sans-serif; font-weight: 300; font-size: 18px; letter-spacing: .12em; margin-bottom: 10px; color: var(--azul-claro); }
.pie a:hover { color: var(--azul-claro); }
.redes { display: flex; justify-content: center; gap: 14px; }
.redes svg { width: 26px; height: 26px; fill: currentColor; }
.cita { max-width: 720px; margin: 44px auto 0; text-align: center; font-family: 'Oswald', sans-serif; font-weight: 200; font-size: 20px; line-height: 1.5; }
.legal { margin-top: 30px; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.15); text-align: center; font-size: 12px; color: #c8d7e2; font-weight: 300; }
.legal p + p { margin-top: 6px; }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .botones, .tarjetas { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
  .marca .logo { width: 64px; height: 64px; }
  .marca .titulo { width: 190px; }
  .btn-menu { display: block; }
  nav { display: none; max-height: calc(100vh - 84px); overflow-y: auto; }
  nav.abierto { display: block; }
  nav > ul { flex-direction: column; }
  nav > ul > li > a { padding: 12px 20px; border-bottom: 1px solid #f0f0f0; }
  nav .sub { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; background: #f7fbfd; }
  nav .sub a { padding-left: 36px; }
  .solucion h2 { font-size: 24px; }
  .programa-titulo h2 { font-size: 30px; }
  .franja .contenedor, .pie { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .botones, .tarjetas { grid-template-columns: 1fr; }
}

/* ---------- Páginas interiores ---------- */
body.interior { background: #eaf5fb url(../img/hero.jpg) center top / cover fixed; }
.banner { background: url(../img/hero.jpg) center / cover; padding: 56px 16px; text-align: center; }
.banner h1 { font-family: 'Oswald', sans-serif; font-weight: 400; font-size: 42px; letter-spacing: .06em; color: var(--blanco); text-shadow: 0 2px 10px rgba(0,0,0,.35); text-transform: uppercase; }
.pagina { background: rgba(255,255,255,.97); padding: 44px 48px 60px; margin: 0 auto 60px; box-shadow: 0 8px 30px rgba(0,0,0,.12); overflow-wrap: anywhere; }
.pagina .texto { margin-bottom: 18px; font-size: 17px; font-weight: 300; color: #222; }
.pagina .texto p { margin: 0 0 8px; }
.pagina .texto p.vacio { height: 10px; margin: 0; }
.pagina h1, .pagina h2, .pagina h3, .pagina h4, .pagina h5, .pagina h6 { font-family: 'Oswald', sans-serif; font-weight: 400; letter-spacing: .03em; color: var(--azul-oscuro); line-height: 1.3; margin: 18px 0 10px; }
.pagina h1 { font-size: 36px; }
.pagina h2 { font-size: 30px; }
.pagina h3 { font-size: 25px; }
.pagina h4 { font-size: 21px; }
.pagina h5, .pagina h6 { font-size: 18px; }
.pagina ul, .pagina ol { margin: 6px 0 12px 26px; }
.pagina li { margin: 3px 0; }
.pagina a:not(.boton-azul) { color: var(--azul-oscuro); text-decoration: underline; }
.pagina a:not(.boton-azul):hover { color: var(--azul); }
.pagina strong { font-weight: 700; }
.pagina .centro { text-align: center; }
.pagina .derecha { text-align: right; }
.pagina .centro ul, .pagina ul.centro, .pagina ol.centro { list-style-position: inside; margin-left: 0; }
.pagina figure { margin: 22px auto; }
.pagina figure img { width: 100%; height: auto; }
.pagina hr { border: 0; border-top: 1px solid #d5e6ef; margin: 28px 0; }
.boton-azul { display: inline-block; margin: 8px 0; padding: 10px 28px; background: var(--azul); color: var(--blanco); border: 0; font-family: 'Oswald', sans-serif; font-size: 16px; letter-spacing: .08em; cursor: pointer; transition: background .25s; }
.boton-azul:hover { background: var(--azul-oscuro); }
.formulario { display: grid; gap: 12px; max-width: 520px; margin: 20px auto; }
.formulario input, .formulario textarea { width: 100%; padding: 12px 14px; border: 1px solid #b9d6e5; font: inherit; font-size: 16px; }
.formulario button { justify-self: center; }
@media (max-width: 720px) {
  body.interior { background-attachment: scroll; }
  .banner { padding: 36px 16px; }
  .banner h1 { font-size: 28px; }
  .pagina { padding: 28px 18px 40px; margin-bottom: 0; }
}
.pagina .pre { white-space: pre-wrap; margin-bottom: 14px; }
.formulario label { display: grid; gap: 4px; font-family: 'Oswald', sans-serif; font-weight: 300; font-size: 15px; letter-spacing: .03em; }
.formulario select { width: 100%; padding: 12px 14px; border: 1px solid #b9d6e5; font: inherit; font-size: 16px; background: var(--blanco); }
.formulario .texto { margin: 6px 0 0; font-size: 16px; }
.pagina .galeria { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; margin: 22px 0; align-items: start; }
.pagina .galeria figure { margin: 0; max-width: none !important; }
.pagina .galeria > a { display: block; }