/* =========================================================
   NATURARQ — Sistema visual
   Lujo silencioso · editorial · arquitectura contemporánea
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;1,300;1,400&family=Hanken+Grotesk:wght@300;400;500;600&display=swap');

:root{
  /* Paleta — blanco roto, piedra, beige, negro cálido */
  --paper:    #F5F2EC;
  --paper-2:  #ECE7DE;
  --paper-3:  #E2DBCF;
  --ink:      #1B1916;
  --ink-2:    #45403A;
  --ink-3:    #6F685E;
  --stone:    #8C8073;
  --accent:   #8A7355;   /* bronce/arcilla, uso mínimo */
  --line:     rgba(27,25,22,0.14);
  --line-soft:rgba(27,25,22,0.08);
  --line-on-dark: rgba(245,242,236,0.18);

  /* Tipografía */
  --serif: "Cormorant Garamond", Georgia, serif;
  --sans:  "Hanken Grotesk", "Helvetica Neue", Arial, sans-serif;

  /* Métricas */
  --maxw: 1500px;
  --gutter: clamp(22px, 5vw, 88px);
  --nav-h: 84px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*{ box-sizing:border-box; }
html{ -webkit-text-size-adjust:100%; scroll-behavior:smooth; }
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-weight:400;
  font-size:17px;
  line-height:1.65;
  letter-spacing:0.005em;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ display:block; max-width:100%; }
a{ color:inherit; text-decoration:none; }
button{ font-family:inherit; }

::selection{ background:var(--ink); color:var(--paper); }

/* ---------- Layout helpers ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding-inline:var(--gutter); }
.section{ padding-block: clamp(72px, 11vw, 180px); }
.section--tight{ padding-block: clamp(56px, 8vw, 120px); }

.eyebrow{
  font-size:12px;
  letter-spacing:0.32em;
  text-transform:uppercase;
  font-weight:500;
  color:var(--ink-3);
  display:inline-flex;
  align-items:center;
  gap:14px;
}
.eyebrow::before{
  content:"";
  width:34px; height:1px;
  background:var(--stone);
  display:inline-block;
}
.eyebrow--plain::before{ display:none; }

h1,h2,h3,h4{ font-family:var(--serif); font-weight:300; margin:0; letter-spacing:-0.01em; }
.display{
  font-family:var(--serif);
  font-weight:300;
  line-height:1.06;
  letter-spacing:-0.015em;
}
.t-hero{ font-size:clamp(44px, 7.4vw, 116px); line-height:1.0; }
.t-xl{ font-size:clamp(36px, 5.4vw, 82px); line-height:1.05; }
.t-lg{ font-size:clamp(30px, 3.8vw, 56px); line-height:1.12; }
.t-md{ font-size:clamp(24px, 2.6vw, 38px); line-height:1.18; }
.lede{
  font-size:clamp(19px, 1.9vw, 25px);
  line-height:1.5;
  color:var(--ink-2);
  font-weight:300;
}
.muted{ color:var(--ink-3); }
em.it{ font-style:italic; }

p{ margin:0 0 1.1em; text-wrap:pretty; }
.measure{ max-width:62ch; }
.measure-sm{ max-width:46ch; }

/* ---------- Buttons / links ---------- */
.btn{
  --bg:var(--ink); --fg:var(--paper);
  display:inline-flex; align-items:center; gap:12px;
  background:var(--bg); color:var(--fg);
  padding:16px 28px;
  font-size:13px; letter-spacing:0.16em; text-transform:uppercase; font-weight:500;
  border:1px solid var(--bg);
  border-radius:0;
  cursor:pointer;
  transition:background .5s var(--ease), color .5s var(--ease), border-color .5s var(--ease), transform .4s var(--ease);
}
.btn:hover{ background:transparent; color:var(--ink); }
.btn--ghost{ --bg:transparent; --fg:var(--ink); border-color:var(--line); }
.btn--ghost:hover{ background:var(--ink); color:var(--paper); border-color:var(--ink); }
.btn--light{ --bg:var(--paper); --fg:var(--ink); }
.btn--light:hover{ background:transparent; color:var(--paper); border-color:var(--line-on-dark); }
.btn--lg{ padding:19px 34px; }

.link-underline{
  display:inline-flex; align-items:center; gap:11px;
  font-size:13px; letter-spacing:0.16em; text-transform:uppercase; font-weight:500;
  color:var(--ink);
  padding-bottom:5px;
  position:relative;
}
.link-underline .arr{ transition:transform .45s var(--ease); display:inline-block; }
.link-underline::after{
  content:""; position:absolute; left:0; bottom:0; height:1px; width:100%;
  background:var(--ink); transform:scaleX(1); transform-origin:right; transition:transform .5s var(--ease);
}
.link-underline:hover::after{ transform:scaleX(0); }
.link-underline:hover .arr{ transform:translateX(6px); }

/* ---------- Header / Nav ---------- */
.site-header{
  position:fixed; inset:0 0 auto 0; z-index:60;
  height:var(--nav-h);
  display:flex; align-items:center;
  transition:border-color .5s var(--ease), height .4s var(--ease);
  border-bottom:1px solid transparent;
}
/* El efecto cristal vive en un pseudo-elemento, NO en la cabecera misma.
   Si backdrop-filter estuviera en .site-header, la convertiría en bloque
   contenedor de sus hijos position:fixed (el menú móvil) y al hacer scroll
   el menú dejaría de ocultarse respecto a la pantalla. Aislándolo aquí,
   .nav siempre se posiciona respecto al viewport. */
.site-header::before{
  content:""; position:absolute; inset:0; z-index:-1; pointer-events:none;
  background:rgba(245,242,236,0.9);
  -webkit-backdrop-filter:saturate(120%) blur(14px);
  backdrop-filter:saturate(120%) blur(14px);
  opacity:0; transition:opacity .5s var(--ease);
}
.site-header .wrap{ display:flex; align-items:center; justify-content:space-between; gap:24px; }
.site-header.is-solid::before{ opacity:1; }
.site-header.is-solid{ border-bottom-color:var(--line-soft); }
.site-header.is-light{ color:var(--paper); }
.site-header.is-light.is-solid{ color:var(--ink); }

.brand{ display:inline-flex; align-items:baseline; gap:0; line-height:1; }
.brand .mark{
  font-family:var(--sans); font-weight:600;
  font-size:21px; letter-spacing:0.34em; text-transform:uppercase;
  padding-right:0.06em;
}
.brand .mark b{ font-weight:600; }
.brand .mark span{ font-weight:300; }

.nav{ display:flex; align-items:center; gap:clamp(20px,2.4vw,42px); }
.nav a{
  font-size:13px; letter-spacing:0.13em; text-transform:uppercase; font-weight:500;
  position:relative; padding:6px 0; color:inherit; opacity:.78;
  transition:opacity .35s var(--ease);
}
.nav a:hover{ opacity:1; }
.nav a.is-active{ opacity:1; }
.nav a.is-active::after{
  content:""; position:absolute; left:0; right:0; bottom:-2px; height:1px; background:currentColor;
}
.nav__cta{
  --bg:var(--ink); --fg:var(--paper);
  border-color:var(--ink);
  margin-left:18px; white-space:nowrap;
  padding:14px 28px;
}
.nav__cta:hover{ background:var(--ink-2); color:var(--paper); border-color:var(--ink-2); }
/* Sobre cabecera clara/transparente (home con hero oscuro) se invierte para destacar */
.site-header.is-light:not(.is-solid) .nav__cta{ --bg:var(--paper); --fg:var(--ink); border-color:var(--paper); }
.site-header.is-light:not(.is-solid) .nav__cta:hover{ background:rgba(245,242,236,.84); color:var(--ink); border-color:rgba(245,242,236,.84); }

.nav-toggle{ display:none; }

/* Mobile nav */
@media (max-width: 900px){
  :root{ --nav-h:70px; }
  /* El logo se mantiene por encima de la capa del menú (z-55) para seguir visible al abrirlo */
  .brand{ position:relative; z-index:62; }
  .nav{
    position:fixed; top:0; left:0; z-index:55;
    width:100%; height:100vh; height:100dvh;
    flex-direction:column; justify-content:center; gap:8px;
    background:var(--paper); color:var(--ink);
    transform:translateY(-101%); transition:transform .6s var(--ease);
    padding:var(--gutter);
  }
  /* El efecto cristal de la cabecera vive en .site-header::before, no en la
     cabecera misma, así que .nav (position:fixed) siempre se posiciona respecto
     al viewport y se oculta fuera de pantalla pase lo que pase al hacer scroll. */
  .nav.is-open{ transform:translateY(0); }
  .nav a{ font-size:18px; letter-spacing:0.08em; opacity:1; padding:12px 0; }
  .nav a.is-active::after{ display:none; }
  .nav .btn{ margin-top:18px; }
  .nav-toggle{
    display:flex; flex-direction:column; gap:6px; justify-content:center;
    width:40px; height:40px; background:none; border:0; cursor:pointer; z-index:62; color:inherit;
  }
  .nav-toggle span{ height:1.5px; width:26px; background:currentColor; transition:transform .4s var(--ease), opacity .3s; }
  body.menu-open .nav-toggle span:nth-child(1){ transform:translateY(7.5px) rotate(45deg); }
  body.menu-open .nav-toggle span:nth-child(2){ opacity:0; }
  body.menu-open .nav-toggle span:nth-child(3){ transform:translateY(-7.5px) rotate(-45deg); }
  body.menu-open .nav-toggle{ color:var(--ink); }
  /* Con el menú abierto, la cabecera se vuelve oscura sobre el fondo crema del menú
     (en home la cabecera es clara y el logo quedaba invisible) */
  body.menu-open .site-header,
  body.menu-open .site-header.is-light{ color:var(--ink); }
  body.menu-open .site-header .mark,
  body.menu-open .site-header .mark b,
  body.menu-open .site-header .mark span{ color:var(--ink); }
}

/* ---------- Footer ---------- */
.site-footer{ background:var(--ink); color:var(--paper); padding-block: clamp(60px,8vw,110px) 40px; }
.site-footer a{ opacity:.7; transition:opacity .3s; }
.site-footer a:hover{ opacity:1; }
.footer-grid{
  display:grid; grid-template-columns: 1.6fr 1fr 1fr; gap:48px;
  padding-bottom:64px; border-bottom:1px solid var(--line-on-dark);
}
.footer-grid .brand .mark{ color:var(--paper); }
.footer-col h4{ font-family:var(--sans); font-size:12px; letter-spacing:0.26em; text-transform:uppercase; font-weight:500; color:rgba(245,242,236,.55); margin-bottom:20px; }
.footer-col ul{ list-style:none; margin:0; padding:0; display:flex; flex-direction:column; gap:11px; font-size:15px; }
.footer-bottom{ display:flex; justify-content:space-between; align-items:center; gap:20px; padding-top:30px; font-size:12.5px; letter-spacing:0.04em; color:rgba(245,242,236,.5); }
@media (max-width:760px){
  .footer-grid{ grid-template-columns:1fr 1fr; gap:36px; }
  .footer-grid .footer-brand{ grid-column:1 / -1; }
  .footer-bottom{ flex-direction:column; align-items:flex-start; }
}

/* ---------- Reveal animation ---------- */
.reveal{ opacity:0; transform:translateY(26px); transition:opacity 1.1s var(--ease), transform 1.1s var(--ease); }
.reveal.in{ opacity:1; transform:none; }
.reveal[data-d="1"]{ transition-delay:.08s; }
.reveal[data-d="2"]{ transition-delay:.16s; }
.reveal[data-d="3"]{ transition-delay:.24s; }
.reveal[data-d="4"]{ transition-delay:.32s; }
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity:1; transform:none; transition:none; }
  html{ scroll-behavior:auto; }
}

/* ---------- Generic image figure ---------- */
.figure{ position:relative; overflow:hidden; background:var(--paper-3); }
.figure img{ width:100%; height:100%; object-fit:cover; }
.ph-label{ position:absolute; left:14px; bottom:12px; font-family:var(--sans); font-size:11px; letter-spacing:0.14em; text-transform:uppercase; color:rgba(255,255,255,.85); }

/* utility */
.center{ text-align:center; }
.stack-sm > * + *{ margin-top:14px; }
.divider{ height:1px; background:var(--line); border:0; margin:0; }