/*
 * site-nav.css
 * Nav de secciones (Nivel 2):
 *   - MOBILE/tablet: barra horizontal sticky bajo el nav.
 *   - DESKTOP (>=1024): riel vertical lateral con scroll-spy (estilo limpio).
 * + barra de progreso de scroll.
 */

#site-nav-root { display: contents; }

html { scroll-behavior: smooth; }

section[id] { scroll-margin-top: calc(var(--nav-h, 64px) + 58px); }

/* ===== Barra de progreso ===== */
.scroll-progress {
  position: fixed; top: 0; left: 0; height: 3px; width: 100%;
  background: var(--color-highlight, #ff8108);
  transform: scaleX(0); transform-origin: left center;
  z-index: 1001; will-change: transform; pointer-events: none;
}

/* ===== Sub-nav base (MOBILE: barra horizontal sticky) ===== */
.section-nav {
  position: sticky;
  top: var(--nav-h, 64px);
  z-index: 998;
  background: var(--color-bg-alt, #1a1a1a);
  border-bottom: 1px solid var(--color-border-light, #2a2a2a);
  transition: top 0.25s ease;
}
.section-nav-inner {
  max-width: var(--container-width, 1296px);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  gap: 28px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  scroll-behavior: smooth;
}
.section-nav-inner::-webkit-scrollbar { display: none; }

.section-link {
  position: relative;
  padding: 13px 2px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-secondary, #b3b3b3);
  white-space: nowrap;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.section-dot { display: none; } /* solo en el riel desktop */
.section-link:hover { color: var(--color-text-primary, #fff); }
.section-link.active {
  color: var(--color-highlight, #ff8108);
  border-bottom-color: var(--color-highlight, #ff8108);
}

@media (max-width: 1023px) {
  .section-nav-inner { padding: 0 16px; gap: 20px; }
  .section-link { font-size: 13px; padding: 11px 2px; }
  .main-nav.nav-hidden ~ .section-nav { top: 0; }
}

body.menu-open .section-nav { display: none; }

/* ============================================================
   DESKTOP (>=1024): RIEL VERTICAL lateral (limpio, estilo referencia)
   ============================================================ */
@media (min-width: 1024px) {
  section[id] { scroll-margin-top: calc(var(--nav-h, 64px) + 28px); }

  .section-nav {
    position: fixed;
    left: 4%;
    top: 50%;
    transform: translateY(-50%);
    width: auto;
    max-width: none;
    margin: 0;
    background: transparent;
    border: none;
    z-index: 60;
    transition: none;
  }
  .section-nav-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 64px;
    padding: 0;
    overflow: visible;
    position: relative;
  }
  /* línea vertical sutil que une los dots */
  .section-nav-inner::before {
    content: '';
    position: absolute;
    left: 5px;
    top: 13px;
    bottom: 13px;
    width: 2px;
    background: var(--color-border-light, #2a2a2a);
    opacity: 0.7; /* más visible en light mode */
  }

  .section-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0 0 0 28px;
    border: none !important;
    height: 0;
  }

  /* dot relleno (visible en claro y oscuro) */
  .section-dot {
    display: block;
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-text-tertiary, #718096);
    box-shadow: 0 0 0 4px var(--color-bg, #000); /* separa de la línea */
    transition: all 0.2s ease;
    z-index: 1;
    opacity: 0.85; /* más visible en light mode */
  }
  .section-link:hover .section-dot {
    background: var(--color-text-primary, #fff);
    opacity: 1;
  }
  .section-link.active .section-dot {
    width: 16px;
    height: 16px;
    background: var(--color-highlight, #ff8108);
    box-shadow: 0 0 0 4px var(--color-bg, #000), 0 0 12px rgba(255, 129, 8, 0.55);
    opacity: 1;
  }

  /* etiqueta: en 1024-1439 oculta -> aparece en hover con pill sutil */
  .section-label {
    opacity: 0;
    transform: translateX(-6px);
    pointer-events: auto;
    background: var(--color-bg-alt, #1a1a1a);
    border: 1px solid var(--color-border-light, #2a2a2a);
    padding: 5px 11px;
    border-radius: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary, #b3b3b3);
    white-space: nowrap;
    transition: opacity 0.2s ease, transform 0.2s ease, color 0.2s ease;
  }
  .section-link:hover .section-label {
    opacity: 1; transform: translateX(0);
    color: var(--color-text-primary, #fff);
  }
  .section-link.active .section-label {
    opacity: 1; transform: translateX(0);
    color: var(--color-highlight, #ff8108);
    border-color: rgba(255, 129, 8, 0.5);
  }
}

/* ===== Pantallas anchas (>=1440): etiquetas SIEMPRE visibles, TEXTO PLANO
   (limpio, sin cajas, bien espaciado — estilo de la referencia) ===== */
@media (min-width: 1440px) {
  .section-nav-inner { gap: 64px; }
  .section-label {
    opacity: 1;
    transform: none;
    background: none;
    border: none;
    box-shadow: none;
    padding: 0;
    font-size: 14.5px;
    font-weight: 600;
    letter-spacing: 0.01em;
    color: var(--color-text-tertiary, #718096);
  }
  .section-link:hover .section-label { color: var(--color-text-primary, #fff); }
  .section-link.active .section-label {
    color: var(--color-highlight, #ff8108);
    font-weight: 700;
  }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .scroll-progress, .section-nav, .section-link, .section-label, .section-dot { transition: none; }
}