/* ============================================================
   LAYOUT.CSS — Prina Web
   Header, Nav, Footer, Grid system
   ============================================================ */

/* ------------------------------------------------------------
   HEADER & NAV
   ------------------------------------------------------------ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-primary);
  will-change: transform;
  transition: box-shadow var(--transition), background var(--transition),
              transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.site-header.header-hidden {
  transform: translateY(-100%);
}

.site-header.scrolled {
  box-shadow: 0 2px 24px rgba(0, 0, 0, 0.25);
}

.site-header.header-light {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  padding-inline: var(--container-pad);
  max-width: var(--container-max);
  margin-inline: auto;
}

/* Logo */
.header-logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.header-logo img {
  height: 34px;
  width: auto;
}

/* Nav desktop */
.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.site-nav a {
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.85);
  transition: color var(--transition);
  padding-block: 6px;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--color-white);
  border-bottom-color: var(--color-accent);
}

.site-header.header-light .site-nav a {
  color: var(--color-primary);
}

.site-header.header-light .site-nav a:hover,
.site-header.header-light .site-nav a.active {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ── Dropdown Servicios ──────────────────────────────────── */
.nav-has-dropdown {
  position: relative;
}

.nav-dropdown-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.85);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  padding-block: 4px;
  cursor: pointer;
  transition: color var(--transition), border-bottom-color var(--transition);
}

.nav-dropdown-btn:hover,
.nav-has-dropdown.open .nav-dropdown-btn {
  color: var(--color-white);
  border-bottom-color: var(--color-accent);
}

.nav-dropdown-btn svg {
  width: 12px;
  height: 12px;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}

.nav-has-dropdown.open .nav-dropdown-btn svg {
  transform: rotate(180deg);
}

/* Panel desplegable */
.nav-dropdown-panel {
  position: absolute;
  top: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 400px;
  background: var(--color-dark);
  border: 1px solid rgba(0,152,247,0.15);
  border-radius: var(--radius-md);
  box-shadow: 0 12px 32px rgba(0,0,0,0.35);
  padding: 6px 0;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 200;
}

.nav-has-dropdown.open .nav-dropdown-panel {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

/* Flecha decorativa arriba del panel */
.nav-dropdown-panel::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 10px;
  height: 6px;
  background: var(--color-dark);
  clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
}

.nav-dropdown-panel a {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 28px;
  font-size: 0.88rem;
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: rgba(255,255,255,0.8);
  border-bottom: none !important;
  white-space: nowrap;
  transition: background var(--transition), color var(--transition);
}

.nav-dropdown-panel a:hover {
  background: rgba(0,152,247,0.12);
  color: var(--color-accent);
  border-bottom-color: transparent !important;
}

.nav-dropdown-panel a svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  opacity: 0.6;
  transition: opacity var(--transition);
}

.nav-dropdown-panel a:hover svg { opacity: 1; }

.nav-dropdown-panel a img {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
  border-radius: 5px;
  object-fit: cover;
  opacity: 0.85;
  transition: opacity var(--transition);
}

.nav-dropdown-panel a:hover img { opacity: 1; }

/* Sub-grupos colapsables dentro del dropdown de Productos */
.nav-subgroup { border-top: 1px solid rgba(255,255,255,0.06); }
.nav-subgroup:first-child { border-top: none; }

.nav-subgroup-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 16px 24px;
  font-size: 0.95rem;
  font-weight: var(--fw-ultra);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  background: none;
  border: none;
  cursor: pointer;
  transition: background var(--transition);
}

.nav-subgroup-btn:hover { background: rgba(0,152,247,0.08); }

.nav-subgroup-btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.nav-subgroup.open .nav-subgroup-btn svg { transform: rotate(180deg); }

.nav-subgroup-panel {
  display: none;
  flex-direction: column;
  background: rgba(0,0,0,0.18);
  padding: 2px 0 4px;
}

.nav-subgroup.open .nav-subgroup-panel { display: flex; }

/* ── CTA header ──────────────────────────────────────────── */
/* CTA header */
.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-accent);
  color: var(--color-white) !important;
  border: none !important;
  border-radius: var(--radius-sm);
  padding: 8px 18px;
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: background var(--transition), transform var(--transition);
}

.nav-cta:hover {
  background: #007acc;
  transform: translateY(-1px);
  border-bottom-color: transparent !important;
}

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.site-header.header-light .nav-toggle span {
  background: var(--color-primary);
}

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile nav overlay */
.nav-mobile {
  display: none;
  position: fixed;
  inset: 70px 0 0 0;
  background: var(--color-dark);
  flex-direction: column;
  padding: var(--space-md);
  gap: var(--space-sm);
  z-index: 99;
  overflow-y: auto;
}

.nav-mobile.open { display: flex; }

.nav-mobile a {
  font-size: var(--text-lg);
  font-weight: var(--fw-medium);
  color: rgba(255,255,255,0.85);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  transition: color var(--transition);
}

.nav-mobile a:hover { color: var(--color-accent); }

.nav-mobile .nav-cta {
  margin-top: var(--space-sm);
  justify-content: center;
  font-size: var(--text-base);
}

/* Menú mobile — secciones colapsables (Servicios, Productos) */
.nav-mobile-group { display: flex; flex-direction: column; }
.nav-mobile-group-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  background: none;
  border: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  padding: var(--space-sm) 0;
  font-family: inherit;
  font-size: var(--text-lg);
  font-weight: var(--fw-medium);
  color: rgba(255,255,255,0.85);
  cursor: pointer;
}
.nav-mobile-group-btn svg {
  width: 13px;
  height: 13px;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.nav-mobile-group.open .nav-mobile-group-btn { color: var(--color-accent); }
.nav-mobile-group.open .nav-mobile-group-btn svg { transform: rotate(180deg); }
.nav-mobile-group-panel {
  display: none;
  flex-direction: column;
  padding-left: var(--space-sm);
}
.nav-mobile-group.open .nav-mobile-group-panel { display: flex; }
.nav-mobile-group-panel a { font-size: var(--text-base); }
.nav-mobile-sublabel {
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(255,255,255,0.4);
  padding: var(--space-sm) 0 4px;
}

/* ------------------------------------------------------------
   MAIN — offset del header fijo
   ------------------------------------------------------------ */
.site-main {
  padding-top: 70px;
}

/* ------------------------------------------------------------
   GRID SYSTEM
   ------------------------------------------------------------ */
.grid {
  display: grid;
  gap: var(--space-md);
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-5 { grid-template-columns: repeat(5, 1fr); }

/* Auto-fill responsive grids */
.grid-auto-sm { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grid-auto-md { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.grid-auto-lg { grid-template-columns: repeat(auto-fill, minmax(380px, 1fr)); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5 { grid-template-columns: 1fr; }
}

/* ------------------------------------------------------------
   SECCIÓN base
   ------------------------------------------------------------ */
.section {
  padding-block: var(--space-xl);
}

.section-sm { padding-block: var(--space-lg); }
.section-lg { padding-block: var(--space-2xl); }

.section-dark {
  background: var(--color-dark);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-white);
}

.section-dark p {
  color: rgba(255,255,255,0.7);
}

.section-blue {
  background: var(--color-primary);
}

.section-blue h1,
.section-blue h2,
.section-blue h3,
.section-blue h4 {
  color: var(--color-white);
}

.section-blue p {
  color: rgba(255,255,255,0.8);
}

.section-light {
  background: #f4f7fb;
}

/* Encabezado de sección */
.section-header {
  margin-bottom: var(--space-lg);
}

.section-header.centered {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-lg);
}

.section-title {
  font-size: clamp(1.8rem, 3.5vw, 2.75rem);
  font-weight: var(--fw-ultra);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.12;
  letter-spacing: -0.01em;
}

.section-title.white { color: var(--color-white); }

.section-desc {
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  font-weight: var(--fw-light);
  color: var(--color-gray);
  max-width: 600px;
  line-height: 1.75;
  margin-inline: auto;
}

.section-desc.white { color: rgba(255,255,255,0.75); }

/* ------------------------------------------------------------
   FOOTER
   ------------------------------------------------------------ */
.site-footer {
  background: var(--color-dark);
  color: rgba(255,255,255,0.7);
  padding-top: var(--space-xl);
  padding-bottom: var(--space-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-logo {
  margin-bottom: var(--space-md);
}

.footer-logo img {
  height: 32px;
  width: auto;
}

.footer-desc {
  font-size: var(--text-sm);
  line-height: 1.7;
  color: rgba(255,255,255,0.55);
  max-width: 280px;
  margin-bottom: var(--space-md);
}

.footer-social {
  display: flex;
  gap: var(--space-sm);
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.65);
  font-size: var(--text-sm);
  transition: border-color var(--transition), color var(--transition), background var(--transition);
}

.footer-social a:hover {
  border-color: var(--color-accent);
  color: var(--color-white);
  background: rgba(0,152,247,0.12);
}

.footer-col h4 {
  color: var(--color-white);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-sm);
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col li a {
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}

.footer-col li a:hover { color: var(--color-accent); }

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.55);
  margin-bottom: 10px;
}

.footer-contact-item svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.35);
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.footer-bottom a {
  color: rgba(255,255,255,0.35);
  transition: color var(--transition);
}

.footer-bottom a:hover { color: rgba(255,255,255,0.65); }

@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .nav-toggle { display: flex; }
  .site-nav { display: none; }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}