/* =========================================================
   Ejemplo: Estudio Cenzontle
   Sin color a propósito: negro, blanco y grises. En una
   página de fotos, cualquier color de la marca le pelea a
   las fotos, que son lo único que se viene a ver.
   ========================================================= */
:root{
  --negro:    #0D0D0F;
  --negro-2:  #17181B;
  --humo:     #F4F3F1;
  --humo-2:   #E4E3E0;
  --gris:     #5C5C63;   /* 6.9:1 sobre humo */
  --gris-cl:  #9A9AA1;
  --verde:    #128C4A;
  --linea:    rgba(13,13,15,.14);
  --f-titulo: "Archivo", "Segoe UI", system-ui, sans-serif;
  --f-texto:  "Inter", "Segoe UI", system-ui, sans-serif;
  --r-sm: 4px; --r: 8px;
  --max: 1200px;
  --pad: clamp(1.1rem, 4vw, 2.2rem);
}

*,*::before,*::after{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; scroll-padding-top:80px; }
@media (prefers-reduced-motion:reduce){ html{ scroll-behavior:auto; } }
body{ margin:0; background:var(--humo); color:var(--gris);
  font-family:var(--f-texto); font-size:1.02rem; line-height:1.65; overflow-x:hidden; }
img{ display:block; max-width:100%; height:auto; }
h1,h2,h3{ margin:0; font-family:var(--f-titulo); font-weight:600; color:var(--negro);
  line-height:1.08; letter-spacing:-.02em; text-wrap:balance; }
h1{ font-size:clamp(2.4rem, 5.4vw, 4rem); font-weight:700; }
h2{ font-size:clamp(1.7rem, 3.4vw, 2.5rem); }
h3{ font-size:1.2rem; }
p{ margin:0 0 1rem; text-wrap:pretty; }
ul,ol{ margin:0; padding:0; list-style:none; }
a{ color:inherit; }
button{ font:inherit; color:inherit; }
:focus-visible{ outline:3px solid var(--negro); outline-offset:3px; }
.wrap{ width:100%; max-width:var(--max); margin-inline:auto; padding-inline:var(--pad); }
.wrap--angosto{ max-width:760px; }
.ico{ width:20px; height:20px; flex:none; fill:none; stroke:currentColor;
  stroke-width:1.6; stroke-linecap:round; stroke-linejoin:round; }
.mini{ font-size:.86rem; }

.sobre{ margin:0 0 .8rem; font-weight:600; font-size:.72rem; letter-spacing:.24em;
  text-transform:uppercase; color:var(--gris); }
.seccion{ padding:clamp(3rem, 7vw, 5rem) 0; }
.seccion--gris{ background:var(--humo-2); }
.sec-head{ max-width:660px; margin:0 auto clamp(1.8rem,4vw,2.6rem); text-align:center; }
.sec-head__txt{ margin:.8rem 0 0; }

/* ---------- Botones ---------- */
.btn{
  --bg:var(--negro); --fg:#fff; --bd:var(--negro); --bg-h:#2A2A30;
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  min-height:48px; padding:.8rem 1.6rem;
  background:var(--bg); color:var(--fg); border:1.5px solid var(--bd); border-radius:var(--r-sm);
  font-family:var(--f-texto); font-weight:600; font-size:.86rem; letter-spacing:.1em;
  text-transform:uppercase; text-decoration:none; cursor:pointer;
  transition:background .2s ease, color .2s ease, border-color .2s ease;
}
.btn:hover{ background:var(--bg-h); border-color:var(--bg-h); }
.btn--grande{ min-height:54px; padding:1rem 1.9rem; font-size:.9rem; }
.btn--claro{ --bg:#fff; --fg:var(--negro); --bd:#fff; --bg-h:var(--humo-2); }
.btn--claro:hover{ border-color:var(--humo-2); }
.btn--linea{ --bg:transparent; --fg:#fff; --bd:rgba(255,255,255,.5); --bg-h:rgba(255,255,255,.14); }
.btn--linea:hover{ border-color:#fff; }
.btn .ico[href$="i-wa"]{ fill:currentColor; stroke:none; }

/* ---------- Cabecera ---------- */
.cabecera{ position:sticky; top:0; z-index:100; background:var(--negro); color:#fff; }
.cabecera__inner{ display:flex; align-items:center; gap:1.2rem; min-height:74px; }
.marca{ display:flex; align-items:center; gap:.7rem; text-decoration:none; color:#fff; }
.marca__ico{ display:grid; place-items:center; width:40px; height:40px;
  border:1px solid rgba(255,255,255,.35); border-radius:var(--r-sm); }
.marca__txt{ display:flex; flex-direction:column; font-family:var(--f-titulo); font-weight:700;
  font-size:1.2rem; line-height:1.05; letter-spacing:.02em; text-transform:uppercase; }
.marca__txt small{ font-family:var(--f-texto); font-weight:400; font-size:.62rem;
  letter-spacing:.2em; text-transform:uppercase; color:var(--gris-cl); }
.nav{ display:flex; align-items:center; gap:1.6rem; margin-left:auto; }
.nav a{ text-decoration:none; color:rgba(255,255,255,.78); font-weight:500; font-size:.86rem;
  letter-spacing:.06em; }
.nav a:not(.btn):hover{ color:#fff; }
.nav a.nav__cta{ color:var(--fg); min-height:40px; padding:.45rem 1.1rem; font-size:.76rem; }
.nav-toggle{ display:none; margin-left:auto; width:44px; height:44px; padding:11px;
  background:transparent; border:1px solid rgba(255,255,255,.3); border-radius:var(--r-sm); cursor:pointer; }
.nav-toggle span{ display:block; height:2px; background:#fff;
  transition:transform .25s ease, opacity .2s ease; }
.nav-toggle span + span{ margin-top:5px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1){ transform:translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3){ transform:translateY(-7px) rotate(-45deg); }
@media (max-width:900px){
  .nav-toggle{ display:block; }
  .nav{ position:absolute; left:0; right:0; top:100%; flex-direction:column; align-items:stretch; gap:0;
    background:var(--negro); padding:.4rem var(--pad) 1.1rem;
    max-height:0; overflow:hidden; visibility:hidden; transition:max-height .3s ease, visibility 0s linear .3s; }
  .nav.is-abierto{ max-height:80vh; visibility:visible; transition:max-height .35s ease, visibility 0s; }
  .nav a{ padding:.95rem 0; border-bottom:1px solid rgba(255,255,255,.14); }
  .nav a.nav__cta{ margin-top:.9rem; border-bottom:0; }
}

/* ---------- Hero ---------- */
.hero{ position:relative; isolation:isolate; overflow:hidden; display:flex; align-items:center;
  min-height:clamp(500px, 76vh, 680px); padding:clamp(3rem,7vw,5rem) 0; color:#fff; }
.hero__foto{ position:absolute; inset:0; z-index:-1; }
.hero__foto img{ width:100%; height:100%; object-fit:cover; filter:grayscale(.3); }
.hero::after{ content:""; position:absolute; inset:0; z-index:0;
  background:linear-gradient(95deg, rgba(13,13,15,.94) 0%, rgba(13,13,15,.8) 48%, rgba(13,13,15,.45) 100%); }
.hero__inner{ position:relative; z-index:1; max-width:620px; }
.hero h1{ color:#fff; }
.hero .sobre{ color:var(--gris-cl); }
.hero .lede{ margin:1.2rem 0 2rem; font-size:1.08rem; max-width:48ch; color:rgba(255,255,255,.86); }
.hero__acciones{ display:flex; flex-wrap:wrap; gap:.7rem; }
@media (max-width:560px){ .hero__acciones .btn{ width:100%; } }

/* ---------- Galería ---------- */
/* Columnas en vez de rejilla: con fotos de distinto formato, una rejilla
   deja huecos al final. Así cada una conserva su proporción y las
   columnas se llenan solas, como un tendedero de fotos. */
.galeria{ column-count:3; column-gap:.7rem; }
.galeria__item{ break-inside:avoid; margin-bottom:.7rem; }
.galeria__item button{ position:relative; display:block; width:100%; padding:0; line-height:0;
  background:var(--negro-2); border:0; border-radius:var(--r); overflow:hidden; cursor:pointer; }
.galeria__item img{ width:100%; height:auto;
  transition:transform .5s ease, opacity .3s ease; }
.galeria__item button:hover img{ transform:scale(1.04); opacity:.8; }
.galeria__lupa{ position:absolute; right:.6rem; bottom:.6rem; display:grid; place-items:center;
  width:36px; height:36px; background:rgba(13,13,15,.7); color:#fff; border-radius:50%;
  opacity:0; transition:opacity .25s ease; }
.galeria__item button:hover .galeria__lupa,
.galeria__item button:focus-visible .galeria__lupa{ opacity:1; }
@media (max-width:900px){ .galeria{ column-count:2; } }

/* ---------- Visor ---------- */
.visor{ width:min(96vw, 1100px); max-width:none; max-height:94vh; padding:0;
  background:transparent; border:0; overflow:visible; }
.visor::backdrop{ background:rgba(8,8,10,.94); }
.visor__caja{ margin:0; display:flex; flex-direction:column; gap:.8rem; align-items:center; }
.visor__caja img{ max-width:100%; max-height:76vh; width:auto; border-radius:var(--r);
  background:var(--negro-2); }
.visor__caja figcaption{ display:flex; flex-wrap:wrap; align-items:baseline; justify-content:center;
  gap:.5rem 1rem; color:#fff; font-size:.92rem; text-align:center; }
.visor__cuenta{ color:var(--gris-cl); font-size:.82rem; letter-spacing:.1em; }
.visor__cerrar, .visor__paso{ position:fixed; display:grid; place-items:center;
  width:48px; height:48px; background:rgba(255,255,255,.12); color:#fff;
  border:1px solid rgba(255,255,255,.25); border-radius:50%; cursor:pointer;
  transition:background .2s ease; }
.visor__cerrar:hover, .visor__paso:hover{ background:rgba(255,255,255,.28); }
.visor__cerrar{ top:1.1rem; right:1.1rem; }
.visor__paso{ top:50%; margin-top:-24px; }
.visor__paso--atras{ left:1.1rem; }
.visor__paso--atras .ico{ transform:rotate(180deg); }
.visor__paso--siguiente{ right:1.1rem; }
@media (max-width:640px){
  .visor__paso{ top:auto; bottom:1.2rem; margin-top:0; }
  .visor__paso--atras{ left:25%; }
  .visor__paso--siguiente{ right:25%; }
  .visor__caja img{ max-height:64vh; }
}

/* ---------- Sesiones ---------- */
.sesiones{ display:grid; gap:1rem; grid-template-columns:repeat(auto-fit, minmax(240px,1fr)); }
.sesion{ display:flex; flex-direction:column; padding:1.5rem 1.4rem; background:var(--humo);
  border:1px solid var(--linea); border-radius:var(--r); }
.sesion h3{ margin-bottom:.5rem; }
.sesion p{ font-size:.95rem; }
.sesion__precio{ margin:auto 0 0; padding-top:1rem; font-family:var(--f-titulo); font-weight:700;
  font-size:1.6rem; color:var(--negro); letter-spacing:-.03em; }
.sesion--grande{ background:var(--negro); border-color:var(--negro); color:rgba(255,255,255,.8); }
.sesion--grande h3, .sesion--grande .sesion__precio{ color:#fff; }

/* ---------- Pasos ---------- */
.pasos{ display:grid; gap:clamp(1rem,2vw,1.4rem); grid-template-columns:repeat(auto-fit, minmax(230px,1fr)); }
.pasos li{ padding-top:1.1rem; border-top:2px solid var(--negro); }
.paso__n{ display:block; margin-bottom:.7rem; font-family:var(--f-titulo); font-weight:700;
  font-size:.86rem; letter-spacing:.14em; color:var(--gris); }
.pasos h3{ margin-bottom:.4rem; }
.pasos p{ margin:0; font-size:.95rem; }

/* ---------- Preguntas ---------- */
.faq{ display:grid; gap:.5rem; }
.faq__item{ background:var(--humo); border:1px solid var(--linea); border-radius:var(--r-sm); overflow:hidden; }
.faq__item summary{ position:relative; cursor:pointer; list-style:none; min-height:44px;
  padding:1rem 3rem 1rem 1.2rem; font-weight:600; color:var(--negro); }
.faq__item summary::-webkit-details-marker{ display:none; }
.faq__item summary::after{ content:""; position:absolute; right:1.3rem; top:50%; width:10px; height:10px;
  margin-top:-7px; border-right:2px solid var(--negro); border-bottom:2px solid var(--negro);
  transform:rotate(45deg); transition:transform .25s ease; }
.faq__item[open] summary::after{ transform:rotate(-135deg); margin-top:-2px; }
.faq__a{ padding:0 1.2rem 1.1rem; }
.faq__a p{ margin:0; }

/* ---------- Pie ---------- */
.pie{ background:var(--negro); color:rgba(255,255,255,.74); padding:2.2rem 0 2.6rem; }
.pie__inner{ display:flex; flex-wrap:wrap; gap:1rem 2rem; justify-content:space-between; }
.pie__marca{ margin:0 0 .2rem; font-family:var(--f-titulo); font-weight:700; font-size:1.2rem;
  letter-spacing:.02em; text-transform:uppercase; color:#fff; }
.pie__datos{ display:grid; gap:.4rem; font-size:.92rem; }
.pie__datos li{ display:flex; align-items:center; gap:.5rem; }
.pie__datos .ico{ color:var(--gris-cl); }