/* ============================================================
   Kasa Nativa — Sistema de diseño
   Paleta del brochure: arena/crema, verde bosque, madera, limón
   Display: Fraunces · Cuerpo: DM Sans
   ============================================================ */

:root {
  /* Superficies */
  --arena: #f2ede3;        /* fondo principal crema */
  --arena-2: #e9e2d3;      /* superficie alterna */
  --arena-deep: #ddd3be;   /* borde suave */

  /* Bosque (tinta principal) */
  --bosque: #12251f;       /* verde profundo */
  --bosque-2: #1b352c;     /* verde elevado */
  --bosque-3: #24463a;     /* verde hover */

  /* Madera cálida */
  --madera: #8a5a33;
  --madera-light: #c89b6d;

  /* Acento limón (del logo) */
  --limon: #b9a53c;
  --limon-dark: #97852c;

  /* Texto sobre claro */
  --tinta: #1c231f;
  --tinta-soft: #4c554e;

  /* Texto sobre bosque */
  --espuma: #f4efe4;
  --espuma-soft: rgba(244, 239, 228, 0.72);

  /* Bordes y sombras */
  --border: rgba(28, 35, 31, 0.12);
  --border-dark: rgba(244, 239, 228, 0.14);
  --shadow-sm: 0 1px 2px rgba(28, 35, 31, 0.06), 0 2px 8px rgba(28, 35, 31, 0.05);
  --shadow-md: 0 6px 18px rgba(28, 35, 31, 0.1), 0 2px 6px rgba(28, 35, 31, 0.06);
  --shadow-lg: 0 24px 50px rgba(10, 20, 16, 0.28);

  --radius: 14px;
  --radius-lg: 22px;
  --container: 1160px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "DM Sans", system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
}

body {
  font-family: var(--font-body);
  background: var(--arena);
  color: var(--tinta);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: inherit; }
.skip-link {
  position: fixed; top: -60px; left: 16px; z-index: 200;
  background: var(--bosque); color: var(--espuma);
  padding: 10px 18px; border-radius: 8px;
  transition: top 0.2s;
}
.skip-link:focus { top: 12px; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---------- Tipografía ---------- */
h1, h2, h3 { font-family: var(--font-display); font-weight: 500; line-height: 1.08; letter-spacing: -0.01em; }

.eyebrow {
  font-size: 0.78rem; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: var(--madera);
}
.h2 { font-size: clamp(1.9rem, 4vw, 2.8rem); margin: 14px 0 0; }
.lead { font-size: 1.12rem; color: var(--tinta-soft); }

.section { padding: 96px 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-sub { margin-top: 14px; color: var(--tinta-soft); }

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: 0.95rem;
  padding: 13px 22px; border-radius: 999px; border: 1px solid transparent;
  cursor: pointer; text-decoration: none; text-align: center;
  transition: transform 0.18s ease, background 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.btn:active { transform: scale(0.98); }
.btn-lg { padding: 16px 28px; font-size: 1rem; }
.btn-block { width: 100%; }
.btn-primary { background: var(--bosque); color: var(--espuma); box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--bosque-3); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn-ghost { background: transparent; color: var(--bosque); border-color: var(--bosque); }
.btn-ghost:hover { background: var(--bosque); color: var(--espuma); transform: translateY(-2px); }
.btn:focus-visible, a:focus-visible, summary:focus-visible, button:focus-visible {
  outline: 2px dashed var(--limon); outline-offset: 3px;
}

/* ---------- Nav ---------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(242, 237, 227, 0.88);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s;
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.nav-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; }
.brand-mark {
  display: block; border-radius: 50%; object-fit: cover;
  box-shadow: 0 2px 8px rgba(28, 35, 31, 0.18);
}
.brand-text { font-family: var(--font-display); font-size: 1.05rem; letter-spacing: 0.04em; line-height: 1; }
.brand-text em { font-style: normal; color: var(--madera); }
.brand-text small { display: block; font-family: var(--font-body); font-size: 0.58rem; letter-spacing: 0.3em; text-transform: uppercase; color: var(--tinta-soft); margin-top: 3px; }

.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a {
  font-size: 0.9rem; font-weight: 500; text-decoration: none; color: var(--tinta-soft);
  position: relative; padding: 4px 0; transition: color 0.15s;
}
.nav-links a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--madera); transition: width 0.22s ease;
}
.nav-links a:hover { color: var(--tinta); }
.nav-links a:hover::after { width: 100%; }

.nav-cta { padding: 10px 18px; font-size: 0.88rem; }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 44px; height: 44px; padding: 10px; background: transparent; border: none; cursor: pointer;
}
.nav-toggle span { display: block; height: 2px; background: var(--bosque); border-radius: 2px; transition: transform 0.25s, opacity 0.2s; }
.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); }

.nav-menu { display: none; }
.nav-menu nav {
  display: flex; flex-direction: column; gap: 4px;
  padding: 12px 24px 20px; border-top: 1px solid var(--border);
}
.nav-menu a { padding: 13px 8px; text-decoration: none; font-weight: 500; border-radius: 10px; }
.nav-menu a:hover { background: var(--arena-2); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; color: var(--espuma); }
.hero-media { position: absolute; inset: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; }
.hero-shade {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(18, 37, 31, 0.55) 0%, rgba(18, 37, 31, 0.25) 40%, rgba(10, 22, 18, 0.92) 100%);
}
.hero-content { position: relative; padding-top: 140px; padding-bottom: 72px; width: 100%; }
.hero-eyebrow { color: var(--madera-light); }
.hero-title {
  font-size: clamp(2.6rem, 6.5vw, 4.6rem); line-height: 1.02; margin: 18px 0 20px; max-width: 15ch;
}
.hero-title span { display: block; }
.hero-title span:nth-child(2) { color: var(--limon); }
.hero-sub { max-width: 52ch; font-size: 1.1rem; color: var(--espuma-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 32px; }
.hero .btn-ghost { color: var(--espuma); border-color: rgba(244, 239, 228, 0.5); }
.hero .btn-ghost:hover { background: var(--espuma); color: var(--bosque); }
.hero-facts {
  display: flex; flex-wrap: wrap; gap: 32px; list-style: none;
  margin-top: 44px; padding-top: 24px; border-top: 1px solid var(--border-dark);
}
.hero-facts strong { display: block; font-family: var(--font-display); font-size: 1.7rem; color: var(--limon); }
.hero-facts span { font-size: 0.82rem; color: var(--espuma-soft); }

/* ---------- Secciones base ---------- */
.nosotros, .materiales { background: var(--arena); }
.prefab, .faq { background: var(--arena-2); }
.modelos { background: var(--bosque); color: var(--espuma); }
.modelos .eyebrow { color: var(--madera-light); }
.modelos .section-sub { color: var(--espuma-soft); }
.ventajas { background: var(--arena); }

.nosotros-grid, .prefab-grid, .materiales-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center;
}
.nosotros-copy p + p { margin-top: 16px; }
.nosotros-copy p:not(.lead) { color: var(--tinta-soft); }
.nosotros-filosofia {
  font-family: var(--font-display); font-size: 1.25rem; color: var(--madera) !important;
  border-left: 3px solid var(--madera); padding-left: 18px; margin-top: 24px !important;
}
.nosotros-media img, .prefab-media img, .materiales-media img {
  width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow-lg);
}
.nosotros-media img { aspect-ratio: 4 / 5; object-fit: cover; }
.prefab-media img { aspect-ratio: 5 / 4; object-fit: cover; }
.materiales-media img { aspect-ratio: 4 / 3.2; object-fit: cover; }

.check-list { list-style: none; margin-top: 22px; display: grid; gap: 12px; }
.check-list li { position: relative; padding-left: 32px; color: var(--tinta-soft); }
.check-list li::before {
  content: ""; position: absolute; left: 0; top: 4px;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--limon); opacity: 0.85;
  -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' stroke='black' stroke-width='2.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
  mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M5 13l4 4L19 7' stroke='black' stroke-width='2.6' fill='none' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
}

/* ---------- Modelos ---------- */
.modelos-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 28px; }
.modelo {
  background: var(--arena); color: var(--tinta); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-md);
  display: flex; flex-direction: column;
  transition: transform 0.22s ease, box-shadow 0.22s ease;
}
.modelo:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.modelo-media { overflow: hidden; aspect-ratio: 16 / 11; }
.modelo-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.modelo:hover .modelo-media img { transform: scale(1.05); }
.modelo-body { padding: 22px 24px 26px; display: flex; flex-direction: column; gap: 4px; flex: 1; }
.modelo-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.modelo-head h3 { font-size: 1.5rem; }
.modelo-medida {
  font-family: var(--font-display); font-size: 1.05rem; color: var(--madera); white-space: nowrap;
}
.modelo-medidas { font-size: 0.82rem; color: var(--tinta-soft); letter-spacing: 0.04em; }
.modelo-feats { list-style: none; margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); display: grid; gap: 7px; }
.modelo-feats li { position: relative; padding-left: 20px; font-size: 0.92rem; color: var(--tinta-soft); }
.modelo-feats li::before { content: "·"; position: absolute; left: 4px; color: var(--madera); font-weight: 700; }

/* ---------- Ventajas ---------- */
.ventajas-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.ventaja {
  background: var(--arena-2); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 32px 28px; transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.ventaja:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.ventaja-ico {
  display: grid; place-items: center; width: 52px; height: 52px;
  border-radius: 14px; background: var(--bosque); color: var(--limon);
}
.ventaja-ico svg { width: 26px; height: 26px; }
.ventaja h3 { font-size: 1.2rem; margin: 18px 0 8px; }
.ventaja p { font-size: 0.94rem; color: var(--tinta-soft); }

/* ---------- Materiales ---------- */
.materiales { background: var(--arena-2); }
.materiales-inner { grid-template-columns: 1.05fr 0.95fr; }

/* ---------- FAQ ---------- */
.faq-inner { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: 64px; }
.faq-list { display: grid; gap: 12px; }
.faq-item {
  background: var(--arena); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: box-shadow 0.2s;
}
.faq-item[open] { box-shadow: var(--shadow-sm); }
.faq-item summary {
  list-style: none; cursor: pointer; padding: 18px 22px;
  font-weight: 600; font-size: 1rem; display: flex; justify-content: space-between; align-items: center; gap: 16px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+"; font-family: var(--font-display); font-size: 1.5rem; line-height: 1;
  color: var(--madera); transition: transform 0.25s ease;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-item p { padding: 0 22px 20px; color: var(--tinta-soft); font-size: 0.95rem; max-width: 68ch; }

/* ---------- Contacto ---------- */
.contacto { background: var(--bosque); color: var(--espuma); }
.contacto .eyebrow { color: var(--madera-light); }
.contacto .lead { color: var(--espuma-soft); }
.contacto-inner { text-align: center; max-width: 760px; }
.contacto-actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 14px; margin-top: 36px; }
.contacto .btn-primary { background: var(--limon-dark); color: var(--espuma); }
.contacto .btn-primary:hover { background: var(--bosque-3); }
.contacto .btn-ghost { color: var(--espuma); border-color: rgba(244, 239, 228, 0.45); }
.contacto .btn-ghost:hover { background: var(--espuma); color: var(--bosque); }
.contacto-ig { margin-top: 28px; color: var(--espuma-soft); font-size: 0.92rem; }
.contacto-ig a { color: var(--limon); font-weight: 600; }

/* ---------- Instagram / Carrusel ---------- */
.instagram { background: var(--arena-2); overflow: hidden; }
.insta-head .insta-handle { color: var(--madera); font-style: italic; }

.carousel { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.carousel-track { display: flex; transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1); }
.carousel-slide { flex: 0 0 100%; min-width: 0; }
.carousel-slide img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; display: block; }

.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 48px; height: 48px; border-radius: 50%; border: none; cursor: pointer;
  background: rgba(18, 37, 31, 0.72); color: var(--espuma);
  font-size: 1.6rem; line-height: 1; display: grid; place-items: center;
  transition: background 0.18s, transform 0.18s;
  z-index: 5;
}
.carousel-btn:hover { background: var(--bosque); transform: translateY(-50%) scale(1.06); }
.carousel-btn:active { transform: translateY(-50%) scale(0.96); }
.carousel-prev { left: 16px; }
.carousel-next { right: 16px; }

.carousel-dots { display: flex; justify-content: center; gap: 8px; margin-top: 18px; }
.carousel-dots button {
  width: 10px; height: 10px; border-radius: 999px; border: none; cursor: pointer; padding: 0;
  background: #b9ad90; transition: width 0.25s ease, background 0.2s;
}
.carousel-dots button:hover { background: var(--madera); }
.carousel-dots button[aria-current="true"] { width: 26px; background: var(--madera); }

.insta-cta { text-align: center; margin-top: 30px; }

@media (max-width: 720px) {
  .carousel-btn { width: 40px; height: 40px; font-size: 1.3rem; }
  .carousel-prev { left: 10px; }
  .carousel-next { right: 10px; }
  .carousel-slide img { aspect-ratio: 4 / 3; }
}

/* ---------- Footer ---------- */
.footer { background: var(--bosque-2); color: var(--espuma); padding: 36px 0; border-top: 1px solid var(--border-dark); }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer-brand { display: flex; align-items: center; gap: 10px; text-decoration: none; font-family: var(--font-display); letter-spacing: 0.04em; }
.footer-brand .brand-mark { box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3); }
.footer-brand em { font-style: normal; color: var(--limon); }
.footer-inner p { font-size: 0.85rem; color: var(--espuma-soft); }
.footer-links { display: flex; gap: 20px; }
.footer-links a { color: var(--espuma-soft); text-decoration: none; font-size: 0.88rem; }
.footer-links a:hover { color: var(--limon); }

/* ---------- Animaciones de entrada ---------- */
.js .reveal { opacity: 0; transform: translateY(22px); transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1), transform 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
.js .reveal.is-in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nosotros-grid, .prefab-grid, .materiales-inner, .faq-inner { grid-template-columns: 1fr; gap: 40px; }
  .ventajas-grid { grid-template-columns: 1fr 1fr; }
  .section { padding: 72px 0; }
}

@media (max-width: 720px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .nav-menu.open { display: block; }
  .ventajas-grid { grid-template-columns: 1fr; }
  .modelos-list { grid-template-columns: 1fr; }
  .hero-content { padding-top: 120px; padding-bottom: 48px; }
  .hero-facts { gap: 20px; }
  .contacto-actions .btn { width: 100%; }
  .faq-inner { gap: 36px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; animation-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}