:root {
  --cr-azul: #1a1a1a;        /* negro de marca (CONSTRUCTORA) */
  --cr-naranja: #0fa3a3;     /* turquesa profundo (acento de marca) */
  --cr-acento-osc: #0c8686;  /* turquesa oscuro (hover) */
  --cr-gris: #f4f5f7;
  --cr-texto: #222;
  --cr-borde: #d9dce1;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--cr-texto);
  background: #fff;
}

.cr-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--cr-azul);
  color: #fff;
}
.cr-logo { color: #fff; text-decoration: none; font-weight: 700; font-size: 1.2rem; }
.cr-nav { display: flex; align-items: center; }
.cr-nav a { color: #fff; text-decoration: none; margin-left: 1rem; }
.cr-nav__login {
  border: 1.5px solid rgba(255,255,255,.6); border-radius: 8px;
  padding: .45rem .9rem; font-weight: 700; transition: background .15s, border-color .15s;
}
.cr-nav__login:hover { background: rgba(255,255,255,.15); border-color: #fff; }

.cr-main { min-height: 60vh; padding: 2rem 1.5rem; }
.cr-hero { text-align: center; padding: 4rem 1rem; }
.cr-hero h1 { font-size: 2.4rem; color: var(--cr-azul); margin: 0 0 .5rem; }

.cr-footer {
  padding: 1.5rem;
  background: var(--cr-gris);
  text-align: center;
  color: #666;
  font-size: .9rem;
}

/* ── Botones ── */
.cr-btn {
  background: var(--cr-naranja);
  color: #fff;
  border: none;
  padding: .6rem 1.2rem;
  border-radius: 6px;
  cursor: pointer;
  font-size: 1rem;
}
.cr-btn--sec { background: #fff; color: var(--cr-texto); border: 1px solid var(--cr-borde); }

.cr-btn--peligro { background: #c0392b; }
.cr-btn--sm { padding: .35rem .7rem; font-size: .85rem; }

/* ── Secciones públicas ── */
.cr-hero__sub { font-size: 1.1rem; color: #555; }
.cr-seccion { max-width: 1100px; margin: 0 auto; padding: 3rem 0; }
.cr-seccion > h2 { color: var(--cr-azul); font-size: 1.8rem; }
.cr-seccion__intro { max-width: 700px; color: #555; }

.cr-servicios { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.2rem; margin-top: 1.5rem; }
.cr-card { background: var(--cr-gris); border-radius: 10px; padding: 1.4rem; }
.cr-card h3 { margin-top: 0; color: var(--cr-naranja); }

.cr-resena { background: var(--cr-azul); color: #fff; padding: 3rem 1.5rem; text-align: center; }
.cr-resena h2 { margin-top: 0; }
.cr-resena p { max-width: 760px; margin: 0 auto; line-height: 1.6; }

/* ── Galería pública ── */
.cr-galeria { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1.2rem; margin-top: 1.5rem; }
.cr-obra { text-decoration: none; color: inherit; border-radius: 10px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,.08); background: #fff; transition: transform .15s; }
.cr-obra:hover { transform: translateY(-3px); }
.cr-obra__img { aspect-ratio: 4 / 3; background: var(--cr-gris); }
.cr-obra__img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.cr-obra__placeholder { display: flex; align-items: center; justify-content: center; height: 100%; color: #aaa; }
.cr-obra__info { padding: .8rem 1rem; display: flex; flex-direction: column; gap: .2rem; }
.cr-obra__info span { color: #777; font-size: .9rem; }
.cr-obra__ubic { color: #777; }

.cr-fotos { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1rem; margin-top: 1.5rem; }
.cr-fotos img { width: 100%; border-radius: 8px; display: block; }

.cr-vacio { color: #888; font-style: italic; }
.cr-contacto a { color: var(--cr-naranja); }

/* ── Modal custom ── */
.cr-modal {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, .45);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}
.cr-modal[hidden] { display: none; }
.cr-modal__box {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem;
  width: min(90vw, 420px);
  box-shadow: 0 10px 40px rgba(0, 0, 0, .25);
}
.cr-modal__titulo { margin: 0 0 .5rem; color: var(--cr-azul); }
.cr-modal__mensaje { margin: 0 0 1.25rem; }
.cr-modal__acciones { display: flex; justify-content: flex-end; gap: .75rem; }