/* ============================================================
   369 ARQUITECTOS — styles.css
   Sistema de diseño editorial (referencia Archvue)
   HTML/CSS/JS plano · Hostinger · editable con Bloc de notas
   ============================================================ */

/* ---------- Fuentes auto-alojadas ---------- */
@font-face {
  font-family: "Cormorant Garamond";
  src: url("../assets/fonts/CormorantGaramond-Regular.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Cormorant Garamond";
  src: url("../assets/fonts/CormorantGaramond-Medium.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "Cormorant Garamond";
  src: url("../assets/fonts/CormorantGaramond-SemiBold.woff2") format("woff2");
  font-weight: 600; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("../assets/fonts/DMSans-Regular.woff2") format("woff2");
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("../assets/fonts/DMSans-Medium.woff2") format("woff2");
  font-weight: 500; font-style: normal; font-display: swap;
}
@font-face {
  font-family: "DM Sans";
  src: url("../assets/fonts/DMSans-Bold.woff2") format("woff2");
  font-weight: 700; font-style: normal; font-display: swap;
}

/* ---------- Tokens ---------- */
:root {
  /* Colores */
  --color-bg:          #FAFAFA;
  --color-surface:     #FFFFFF;
  --color-text:        #1A1A1A;
  --color-text-muted:  #6B6B6B;
  --color-accent:      #8B5E3C;
  --color-accent-dark: #6B4226;
  --color-border:      #E0D5C9;
  --color-overlay:     rgba(26, 26, 26, 0.55);
  --color-success:     #4A7C59;
  --color-error:       #C1524A;

  /* Banners de color por sección (cada sección cambia el fondo al hacer scroll) */
  --band-residencial:  #EDE6DC;
  --band-glamping:     #E4EBE0;
  --band-interiorismo: #ECE4E1;
  --band-dark:         #1A1A1A;

  /* Tipografía */
  --font-heading: "Cormorant Garamond", Georgia, "Times New Roman", serif;
  --font-body:    "DM Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;

  --text-hero:    clamp(2.5rem, 5vw + 1rem, 4.5rem);
  --text-h1:      clamp(2rem, 4vw + 0.5rem, 3.5rem);
  --text-h2:      clamp(1.75rem, 3vw + 0.5rem, 2.5rem);
  --text-h3:      clamp(1.25rem, 2vw + 0.25rem, 1.5rem);
  --text-body:    1rem;
  --text-small:   0.875rem;
  --text-caption: 0.75rem;

  /* Spacing */
  --space-xs: 0.25rem; --space-sm: 0.5rem;  --space-md: 1rem;
  --space-lg: 1.5rem;  --space-xl: 2rem;    --space-2xl: 3rem;
  --space-3xl: 4rem;   --space-4xl: 6rem;   --space-5xl: 8rem;

  /* Layout */
  --max-width: 1440px;
  --content-width: 1200px;
  --gutter: clamp(1rem, 3vw, 2rem);
  --nav-height: 80px;
  --radius: 2px;

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

/* ---------- Reset (Andy Bell, condensado) ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { -webkit-text-size-adjust: 100%; }
body { min-height: 100vh; line-height: 1.6; -webkit-font-smoothing: antialiased; }
img, picture, svg, video { display: block; max-width: 100%; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { line-height: 1.1; text-wrap: balance; font-weight: 500; }
p { text-wrap: pretty; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; padding: 0; }

/* ---------- Base ---------- */
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: var(--text-body);
  color: var(--color-text);
  background: var(--color-bg);
  transition: background-color 0.6s var(--ease);  /* banda de color por scroll */
}
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.heading { font-family: var(--font-heading); font-weight: 500; letter-spacing: -0.01em; }
.eyebrow {
  font-size: var(--text-caption);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
}
.muted { color: var(--color-text-muted); }

/* Línea que crece al entrar en viewport */
.rule { height: 1px; background: var(--color-border); transform-origin: left center; }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: var(--space-sm);
  font-size: var(--text-small); font-weight: 500;
  letter-spacing: 0.04em; text-transform: uppercase;
  padding: 0.9rem 1.8rem; border: 1px solid var(--color-text);
  border-radius: var(--radius); background: var(--color-text); color: var(--color-bg);
  cursor: pointer; transition: background 0.4s var(--ease), color 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn:hover { background: transparent; color: var(--color-text); }
.btn--ghost { background: transparent; color: var(--color-text); }
.btn--ghost:hover { background: var(--color-text); color: var(--color-bg); }
.btn--light { border-color: var(--color-bg); background: var(--color-bg); color: var(--color-text); }
.btn--light:hover { background: transparent; color: var(--color-bg); }

/* ---------- Nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  height: var(--nav-height);
  display: flex; align-items: center;
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav__inner {
  width: 100%; max-width: var(--max-width); margin-inline: auto;
  padding-inline: var(--gutter);
  display: flex; align-items: center; justify-content: space-between;
}
.nav__logo {
  font-family: var(--font-heading); font-weight: 600; font-size: 1.5rem;
  letter-spacing: 0.04em; color: #fff; transition: color 0.4s var(--ease);
}
.nav__logo b { font-weight: 600; }
.nav__links { display: flex; gap: var(--space-xl); align-items: center; }
.nav__link {
  font-size: var(--text-small); font-weight: 500; letter-spacing: 0.06em;
  text-transform: uppercase; color: #fff; position: relative; padding: 0.25rem 0;
  transition: color 0.4s var(--ease); opacity: 0.9;
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: currentColor; transition: width 0.4s var(--ease);
}
.nav__link:hover::after, .nav__link.active::after { width: 100%; }
.nav__link.active { opacity: 1; }

/* Nav sólido tras el hero */
.nav.is-solid {
  background: var(--color-bg);
  border-bottom-color: var(--color-border);
}
.nav.is-solid .nav__logo,
.nav.is-solid .nav__link { color: var(--color-text); }

/* Hamburger */
.nav__toggle {
  display: none; width: 40px; height: 40px; background: none; border: 0;
  cursor: pointer; position: relative; z-index: 120;
}
.nav__toggle span {
  position: absolute; left: 8px; right: 8px; height: 1.5px; background: #fff;
  transition: transform 0.4s var(--ease), opacity 0.3s var(--ease);
}
.nav.is-solid .nav__toggle span { background: var(--color-text); }
.nav__toggle span:nth-child(1) { top: 15px; }
.nav__toggle span:nth-child(2) { top: 22px; }
.nav.is-open .nav__toggle span { background: var(--color-text); }
.nav.is-open .nav__toggle span:nth-child(1) { transform: translateY(3.5px) rotate(45deg); }
.nav.is-open .nav__toggle span:nth-child(2) { transform: translateY(-3.5px) rotate(-45deg); }

/* Overlay móvil */
.nav__overlay {
  position: fixed; inset: 0; z-index: 110; background: var(--color-bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--space-xl); opacity: 0; visibility: hidden;
  transition: opacity 0.4s var(--ease), visibility 0.4s var(--ease);
}
.nav.is-open .nav__overlay { opacity: 1; visibility: visible; }
.nav__overlay a {
  font-family: var(--font-heading); font-size: var(--text-h2); color: var(--color-text);
  opacity: 0; transform: translateY(20px);
}
.nav.is-open .nav__overlay a { opacity: 1; transform: translateY(0); transition: opacity 0.5s var(--ease), transform 0.5s var(--ease); }
.nav.is-open .nav__overlay a:nth-child(1) { transition-delay: 0.08s; }
.nav.is-open .nav__overlay a:nth-child(2) { transition-delay: 0.14s; }
.nav.is-open .nav__overlay a:nth-child(3) { transition-delay: 0.20s; }
.nav.is-open .nav__overlay a:nth-child(4) { transition-delay: 0.26s; }
.nav.is-open .nav__overlay a:nth-child(5) { transition-delay: 0.32s; }

/* ---------- Hero ---------- */
.hero {
  position: relative; min-height: 100svh; display: flex; align-items: flex-end;
  overflow: hidden; color: #fff;
}
.hero__media { position: absolute; inset: 0; z-index: -2; }
.hero__media img { width: 100%; height: 140%; object-fit: cover; will-change: transform; }
.hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1;
  background: linear-gradient(180deg, rgba(26,26,26,0.35) 0%, rgba(26,26,26,0.15) 40%, rgba(26,26,26,0.65) 100%);
}
.hero__inner { width: 100%; padding-bottom: var(--space-4xl); }
.hero__eyebrow { color: rgba(255,255,255,0.85); margin-bottom: var(--space-md); }
.hero__title { font-family: var(--font-heading); font-size: var(--text-hero); font-weight: 500; max-width: 16ch; }
.hero__title .line { display: block; overflow: hidden; }
.hero__title .line > span { display: block; }
.hero__sub { margin-top: var(--space-lg); max-width: 46ch; color: rgba(255,255,255,0.88); font-size: 1.05rem; }
.hero__actions { margin-top: var(--space-xl); display: flex; gap: var(--space-md); flex-wrap: wrap; }

/* Scroll indicator */
.scroll-cue {
  position: absolute; left: 50%; bottom: var(--space-xl); transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: var(--space-sm);
  font-size: var(--text-caption); letter-spacing: 0.2em; text-transform: uppercase;
  color: rgba(255,255,255,0.8);
}
.scroll-cue__line { width: 1px; height: 40px; background: rgba(255,255,255,0.6); transform-origin: top; }

/* ---------- Secciones (bandas de color) ---------- */
.section { padding-block: var(--space-5xl); }
.section--band-res { background: var(--band-residencial); }
.section--band-gla { background: var(--band-glamping); }
.section--band-int { background: var(--band-interiorismo); }
.section__head { max-width: 60ch; margin-bottom: var(--space-3xl); }
.section__title { font-size: var(--text-h1); margin-top: var(--space-sm); }
.section__lead { margin-top: var(--space-lg); color: var(--color-text-muted); font-size: 1.1rem; max-width: 52ch; }

/* ---------- Cards de sección (home) ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
.card {
  position: relative; display: block; overflow: hidden; border-radius: var(--radius);
  background: var(--color-surface); aspect-ratio: 4 / 5;
}
.card__img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.card:hover .card__img { transform: scale(1.05); }
.card::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(26,26,26,0) 40%, rgba(26,26,26,0.75) 100%);
}
.card__body { position: absolute; inset: auto 0 0 0; z-index: 2; padding: var(--space-xl); color: #fff; }
.card__index { font-size: var(--text-caption); letter-spacing: 0.2em; opacity: 0.8; }
.card__title { font-family: var(--font-heading); font-size: var(--text-h3); margin-top: var(--space-xs); }
.card__desc { font-size: var(--text-small); color: rgba(255,255,255,0.85); margin-top: var(--space-sm); max-width: 32ch; }
.card__cta { display: inline-flex; align-items: center; gap: 0.5rem; margin-top: var(--space-md); font-size: var(--text-small); letter-spacing: 0.04em; text-transform: uppercase; }
.card__cta svg { transition: transform 0.4s var(--ease); }
.card:hover .card__cta svg { transform: translateX(4px); }

/* ---------- Galería (páginas de sección) ---------- */
.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-lg); }
.gallery__item { position: relative; overflow: hidden; border-radius: var(--radius); background: var(--color-surface); }
.gallery__item--wide { grid-column: span 2; }
.gallery__item img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 4 / 3; transition: transform 0.6s var(--ease); }
.gallery__item--wide img { aspect-ratio: 16 / 9; }
.gallery__item:hover img { transform: scale(1.04); }
.gallery__cap {
  position: absolute; inset: auto 0 0 0; padding: var(--space-lg);
  background: linear-gradient(180deg, rgba(26,26,26,0) 0%, rgba(26,26,26,0.72) 100%);
  color: #fff; opacity: 0; transform: translateY(10px); transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.gallery__item:hover .gallery__cap { opacity: 1; transform: translateY(0); }
.gallery__cap h3 { font-family: var(--font-heading); font-size: var(--text-h3); }
.gallery__cap span { font-size: var(--text-small); color: rgba(255,255,255,0.85); }
.gallery__badge {
  position: absolute; top: var(--space-md); left: var(--space-md); z-index: 2;
  font-size: 0.65rem; letter-spacing: 0.15em; text-transform: uppercase;
  background: rgba(250,250,250,0.9); color: var(--color-text-muted);
  padding: 0.35rem 0.6rem; border-radius: var(--radius);
}

/* ---------- Contacto ---------- */
.contact { background: var(--band-dark); color: var(--color-bg); }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4xl); align-items: start; }
.contact__title { font-family: var(--font-heading); font-size: var(--text-h1); }
.contact__lead { margin-top: var(--space-lg); color: rgba(250,250,250,0.75); max-width: 40ch; }
.contact__details { margin-top: var(--space-2xl); display: grid; gap: var(--space-lg); }
.contact__row { display: grid; gap: 0.2rem; }
.contact__row .k { font-size: var(--text-caption); letter-spacing: 0.15em; text-transform: uppercase; color: rgba(250,250,250,0.5); }
.contact__row a, .contact__row span { font-size: 1.05rem; color: var(--color-bg); }
.contact__row a:hover { color: var(--color-accent); }

/* Formulario */
.form { display: grid; gap: var(--space-lg); }
.form__field { display: grid; gap: var(--space-sm); }
.form__field label { font-size: var(--text-caption); letter-spacing: 0.12em; text-transform: uppercase; color: rgba(250,250,250,0.6); }
.form__field input, .form__field textarea {
  background: transparent; border: 0; border-bottom: 1px solid rgba(250,250,250,0.25);
  padding: 0.7rem 0; color: var(--color-bg); font-size: 1rem; border-radius: 0;
  transition: border-color 0.3s var(--ease);
}
.form__field input:focus, .form__field textarea:focus { outline: none; border-bottom-color: var(--color-accent); }
.form__field textarea { resize: vertical; min-height: 90px; }
.form__field.is-invalid input, .form__field.is-invalid textarea { border-bottom-color: var(--color-error); }
.form__error { font-size: var(--text-caption); color: var(--color-error); min-height: 1em; }
.form__hp { position: absolute; left: -9999px; opacity: 0; }
.form__note { font-size: var(--text-caption); color: rgba(250,250,250,0.5); }
.form__note.is-success { color: #9fce af; }

/* ---------- Footer ---------- */
.footer { background: var(--color-bg); border-top: 1px solid var(--color-border); padding-block: var(--space-4xl) var(--space-2xl); }
.footer__top { display: flex; justify-content: space-between; gap: var(--space-2xl); flex-wrap: wrap; align-items: flex-start; }
.footer__brand { font-family: var(--font-heading); font-weight: 600; font-size: 2rem; letter-spacing: 0.04em; }
.footer__tag { color: var(--color-text-muted); margin-top: var(--space-sm); max-width: 34ch; }
.footer__cols { display: flex; gap: var(--space-4xl); flex-wrap: wrap; }
.footer__col h4 { font-size: var(--text-caption); letter-spacing: 0.15em; text-transform: uppercase; color: var(--color-text-muted); margin-bottom: var(--space-md); font-family: var(--font-body); font-weight: 500; }
.footer__col a, .footer__col span { display: block; font-size: var(--text-small); margin-bottom: var(--space-sm); color: var(--color-text); }
.footer__col a:hover { color: var(--color-accent); }
.footer__bottom { margin-top: var(--space-3xl); padding-top: var(--space-lg); border-top: 1px solid var(--color-border); display: flex; justify-content: space-between; gap: var(--space-md); flex-wrap: wrap; font-size: var(--text-caption); color: var(--color-text-muted); }

/* ---------- Reveal (red de seguridad: visible por defecto) ---------- */
[data-animate] { will-change: transform, opacity; }
.js [data-animate="fade-up"] { opacity: 0; transform: translateY(40px); }
.js [data-animate="fade"] { opacity: 0; }
.js .cards .card { transform: translateY(40px); }
.js .hero__title .line > span { transform: translateY(110%); }
/* Si JS falla, .js nunca se añade → todo queda visible */

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .contact__grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .gallery { grid-template-columns: 1fr; }
  .gallery__item--wide { grid-column: span 1; }
  .gallery__item--wide img { aspect-ratio: 4 / 3; }
}
@media (max-width: 768px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; }
  .section { padding-block: var(--space-4xl); }
  .hero__inner { padding-bottom: var(--space-3xl); }
  .footer__top { flex-direction: column; }
}

/* ---------- Reduced motion: solo suaviza, no rompe ---------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .js [data-animate] { opacity: 1 !important; transform: none !important; }
  .js .hero__title .line > span { transform: none !important; }
}


/* ===== Galería vertical de proyectos (4:5) ===== */
.gallery--portrait { grid-template-columns: repeat(2, 1fr); }
.gallery--portrait .gallery__item img { aspect-ratio: 4 / 5; }
.gallery__count { position: absolute; top: 16px; right: 16px; z-index: 2;
  font-size: var(--text-small); letter-spacing: .05em; text-transform: uppercase;
  background: rgba(26,26,26,.72); color: #fff; padding: 6px 12px; border-radius: 100px;
  -webkit-backdrop-filter: blur(4px); backdrop-filter: blur(4px); }
@media (max-width: 768px) { .gallery--portrait { grid-template-columns: 1fr; } }

/* ===== Lightbox / carrusel de proyecto ===== */
.lightbox { position: fixed; inset: 0; z-index: 1000; display: none; }
.lightbox__backdrop { position: absolute; inset: 0; z-index: 0; background: rgba(18,16,14,.96); -webkit-backdrop-filter: blur(3px); backdrop-filter: blur(3px); }
.lightbox.is-open { display: flex; align-items: center; justify-content: center; }
.lightbox__img { position: relative; z-index: 2; max-width: 90vw; max-height: 84vh; object-fit: contain;
  opacity: 1 !important; box-shadow: 0 30px 80px rgba(0,0,0,.55); }
.lightbox__btn { position: absolute; z-index: 3; background: none; border: 0; color: #fff;
  cursor: pointer; opacity: .75; transition: opacity .2s; font-family: var(--font-heading); }
.lightbox__btn:hover { opacity: 1; }
.lightbox__close { top: 22px; right: 28px; font-size: 40px; line-height: 1; }
.lightbox__nav { top: 50%; transform: translateY(-50%); font-size: 52px; padding: 8px 16px; }
.lightbox__prev { left: 20px; } .lightbox__next { right: 20px; }
.lightbox__cap { position: absolute; z-index: 3; top: 26px; left: 30px; color: #fff;
  font-family: var(--font-heading); font-size: var(--text-h3); pointer-events: none; }
.lightbox__counter { position: absolute; z-index: 3; bottom: 24px; left: 0; right: 0; text-align: center;
  color: rgba(255,255,255,.8); font-size: var(--text-small); letter-spacing: .12em; pointer-events: none; }
@media (max-width: 768px) {
  .lightbox__nav { font-size: 38px; } .lightbox__prev { left: 2px; } .lightbox__next { right: 2px; }
  .lightbox__cap { font-size: var(--text-body); top: 18px; left: 18px; }
}


/* ===== Logo (imagen) ===== */
.nav__logo { display: inline-flex; align-items: center; line-height: 0; }
.nav__logo-img { height: 52px; width: auto; display: block; }
.nav__logo-img--dark { display: none; }
.nav.is-solid .nav__logo-img--light { display: none; }
.nav.is-solid .nav__logo-img--dark { display: block; }
.footer__logo { height: 76px; width: auto; display: block; }
@media (max-width: 768px) { .nav__logo-img { height: 44px; } .footer__logo { height: 64px; } }


/* Flechas del lightbox tocables en móvil */
@media (max-width: 768px) {
  .lightbox__nav {
    width: 46px; height: 46px; padding: 0; font-size: 26px; border-radius: 50%;
    background: rgba(0,0,0,.42); display: flex; align-items: center; justify-content: center;
  }
  .lightbox__prev { left: 10px; } .lightbox__next { right: 10px; }
  .lightbox__close { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center;
    background: rgba(0,0,0,.42); border-radius: 50%; font-size: 28px; top: 14px; right: 14px; }
}


/* scroll-cue oculto siempre */
.scroll-cue { display: none !important; }