/* header, footer y el riel de nav (se pliega a menú arriba en móvil) */

:root{
  --rail-width: 236px;
}

/* fondo fijo de toda la web, no solo del hero. ojo con el z-index:
   si lo saco, position:fixed igual forma su propio stacking context
   y tapa el contenido. body tiene su propio z-index en base.css por
   la misma razón */

.page-backdrop{
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: -1;
  background-image:
    linear-gradient(rgba(13,14,11,0.55), rgba(13,14,11,0.55)), /* velo parejo, si no el texto no se lee */
    linear-gradient(100deg, rgba(13,14,11,0.35) 0%, rgba(13,14,11,0.15) 40%, rgba(13,14,11,0.05) 70%),
    linear-gradient(180deg, rgba(13,14,11,0.15) 0%, transparent 25%, transparent 70%, rgba(13,14,11,0.4) 100%),
    url('../img/hero-bg.jpg');
  background-size: cover, cover, cover, cover;
  background-position: center, center, center, center 35%; /* centrado sobre toda la pantalla, no sobre el riel */
  background-repeat: no-repeat;
}

.site-header{
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(11,13,9,0.92);
  backdrop-filter: blur(8px);
  border-bottom: var(--edge);
}

.navbar{
  max-width: 1080px;
  margin: 0 auto;
  padding: 16px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--bone);
}

.brand-mark{
  width: 30px;
  height: 30px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 0 2px var(--ink), 0 0 0 3px var(--moss-dim);
}

.brand-name{
  font-family: var(--font-display);
  font-size: 1.35rem;
  letter-spacing: 0.08em;
}

.brand-name b{
  color: var(--moss);
  font-weight: 400;
}

.nav-toggle{
  display: none;
  background: none;
  border: var(--edge);
  color: var(--bone);
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
}

.nav-toggle span{
  display: block;
  width: 18px;
  height: 2px;
  background: var(--bone);
  margin: 4px auto;
  transition: transform .2s ease, opacity .2s ease;
}

.nav-links{
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a{
  position: relative;
  display: block;
  padding: 8px 14px;
  color: var(--ash);
  font-size: 0.88rem;
  letter-spacing: 0.03em;
  border-radius: var(--radius);
  transition: color .15s ease, background .15s ease;
}

.nav-links a:hover{
  color: var(--bone);
  background: var(--panel);
}

.nav-links a.is-active{
  color: var(--moss-bright);
}

.nav-links .nav-panel-link{
  border: 1px solid var(--moss-dim);
  color: var(--moss-bright);
  margin-left: 8px;
}

.nav-links .nav-panel-link:hover{
  background: var(--moss-dim);
  color: var(--bone);
}

.nav-links li{ position: relative; }

.nav-submenu-toggle{
  position: absolute;
  top: 8px;
  right: 6px;
  width: 22px;
  height: 22px;
  border: none;
  background: none;
  color: var(--ash-dark);
  cursor: pointer;
  font-size: 0.7rem;
  line-height: 1;
  transition: transform .15s ease, color .15s ease;
}

.nav-links li.has-open-submenu .nav-submenu-toggle{
  transform: rotate(180deg);
  color: var(--moss-bright);
}

.nav-submenu{
  list-style: none;
  max-height: 0;
  overflow: hidden;
  transition: max-height .2s ease;
}

.nav-links li.has-open-submenu .nav-submenu{
  max-height: 400px;
}

.nav-submenu a{
  display: block;
  padding: 6px 12px 6px 26px;
  font-size: 0.78rem;
  color: var(--ash-dark);
}

.nav-submenu a:hover{ color: var(--bone); }

/* Página */

.page-head{
  padding: 64px 0 40px;
  border-bottom: var(--edge);
  background: linear-gradient(180deg, rgba(21,22,15,0.55), rgba(13,14,11,0.35));
  animation: pageHeadIn .5s ease both;
}

@keyframes pageHeadIn{
  from{ opacity: 0; transform: translateY(14px); }
  to{ opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce){
  .page-head{ animation: none; }
}

.page-head h1{
  font-size: clamp(2.4rem, 6vw, 3.6rem);
}

.page-head .lede{
  max-width: 640px;
  font-size: 1.05rem;
  margin-top: 14px;
}

main{
  padding: 56px 0 90px;
}

/* Aviso de contenido de ejemplo: se usa en las páginas cuyo texto
   todavía no fue definido por el equipo, para que quede clarísimo
   que lo que sigue es una plantilla y no lore/reglas reales. */

.placeholder-banner{
  display: flex;
  gap: 12px;
  align-items: flex-start;
  max-width: 680px;
  margin: 28px auto 0;
  padding: 14px 18px;
  border: 1px dashed var(--rust);
  background: rgba(138,82,37,0.08);
  border-radius: var(--radius);
}

.placeholder-banner .icon{
  flex-shrink: 0;
  font-family: var(--font-display);
  color: var(--rust-bright);
  font-size: 1.1rem;
  line-height: 1;
}

.placeholder-banner p{
  margin: 0;
  font-size: 0.85rem;
  color: var(--ash);
}

.placeholder-banner strong{ color: var(--rust-bright); }

.placeholder-text{
  color: var(--ash-dark) !important;
  font-style: italic;
}

.site-footer{
  border-top: var(--edge);
  padding: 40px 0;
  background: var(--ink-raised);
}

.footer-grid{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 24px;
  align-items: center;
}

.footer-note{
  color: var(--ash-dark);
  font-size: 0.85rem;
  margin: 0;
}

.footer-links{
  display: flex;
  gap: 20px;
  list-style: none;
}

.footer-links a{
  color: var(--ash);
  font-size: 0.85rem;
}

.footer-links a:hover{
  color: var(--moss);
}

/* riel lateral en desktop */

@media (min-width: 861px){
  body{
    padding-left: var(--rail-width);
  }

  .site-header{
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--rail-width);
    border-bottom: none;
    border-right: var(--edge);
    background: var(--ink-raised);
    overflow-y: auto;
    overflow-x: hidden;
  }

  .site-header::after{
    content: '';
    position: absolute;
    top: 0; right: -1px; bottom: 0;
    width: 1px;
    background: linear-gradient(180deg, transparent, var(--moss-dim) 15%, var(--rust) 50%, var(--moss-dim) 85%, transparent);
    opacity: .6;
  }

  .navbar{
    flex-direction: column;
    align-items: stretch;
    height: 100%;
    max-width: none;
    padding: 28px 18px 22px;
    gap: 0;
  }

  .brand{
    padding: 0 8px 26px;
    margin-bottom: 22px;
    border-bottom: var(--edge);
  }

  .nav-toggle{ display: none !important; }

  .nav-links{
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    flex: 1;
  }

  .nav-links a{
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 12px;
    border-left: 2px solid transparent;
  }

  .nav-links a:hover{
    background: var(--panel);
    border-left-color: var(--moss-dim);
  }

  .nav-links a.is-active{
    background: var(--panel);
    border-left-color: var(--moss-bright);
  }

  .nav-links .nav-panel-link{
    margin-left: 0;
    margin-top: auto;
    border: 1px solid var(--moss-dim);
    border-left: 2px solid var(--moss-dim);
  }
}

@media (max-width: 860px){
  .nav-toggle{ display: block; }

  .nav-links{
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--ink-raised);
    border-bottom: var(--edge);
    padding: 8px 16px 16px;
    display: none;
  }

  .nav-links.is-open{ display: flex; }

  .nav-links .nav-panel-link{ margin-left: 0; margin-top: 6px; text-align: center; }
}