/* ─── Variables CSS ─── */
:root {
  --yellow-safety: #FFE16D;
  --navy-deep:     #001F3F;
  --navy-darkest:  #000613;
  --surface-base:  #F8F9FA;
}

/* ─── Tipografía base ─── */
body {
  font-family: 'Inter', sans-serif;
  background-color: var(--surface-base);
  min-height: 100dvh;
}

/* ─── Material Icons ─── */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 300, 'GRAD' 0, 'opsz' 24;
}
.icon-filled {
  font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24;
}

/* ─── Blueprint grid (textura de fondo) ─── */
.blueprint-grid {
  background-image: radial-gradient(circle, #74777f 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.05;
  pointer-events: none;
}

/* ─── Gradiente Hero (brushed-metal effect) ─── */
.hero-gradient {
  background: linear-gradient(135deg, var(--navy-darkest) 0%, var(--navy-deep) 100%);
}

/* ─── Nav link activo ─── */
.nav-link {
  position: relative;
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: color 0.2s;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0; height: 2px;
  background: var(--yellow-safety);
  transition: width 0.25s ease;
}
.nav-link:hover::after,
.nav-link.active::after { width: 100%; }

/* ─── Input underline (drafting style) ─── */
.input-drafting {
  background: transparent;
  border: none;
  border-bottom: 2px solid #74777F;
  border-radius: 0;
  padding: 0.5rem 0;
  outline: none;
  transition: border-color 0.2s;
  width: 100%;
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  color: #191C1D;
}
.input-drafting:focus { border-bottom-color: #705D00; }
.input-drafting::placeholder { color: #74777F; font-size: 0.8125rem; }

/* ─── Botón primario ─── */
.btn-primary {
  background-color: var(--navy-deep);
  color: #fff;
  font-family: 'Inter', sans-serif;
  font-weight: 700;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  border-radius: 0.125rem;
  padding: 1rem 2rem;
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  transition: background-color 0.2s, transform 0.1s;
  border-left: 3px solid transparent;
}
.btn-primary:hover {
  background-color: var(--navy-darkest);
  border-left-color: var(--yellow-safety);
}
.btn-primary:active { transform: scale(0.97); }

/* ─── Divider ban: usamos zoning en lugar de líneas ─── */
.tonal-zone { background-color: #F3F4F5; }
.tonal-zone-white { background-color: #FFFFFF; }

/* ─── SEC Badge (stamped look) ─── */
.sec-badge {
  background-color: #AFC8F0;
  color: #001634;
  font-family: 'Space Mono', monospace;
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  padding: 0.25rem 0.625rem;
  border-radius: 0.125rem;
}

/* ─── Monospace para datos técnicos ─── */
.tech-data {
  font-family: 'Space Mono', monospace;
  font-size: 0.75rem;
}

/* ─── Animaciones de entrada (scroll reveal) ─── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ─── Card servicio hover ─── */
.service-card {
  background-color: #FFFFFF;
  transition: background-color 0.4s ease, color 0.4s ease;
  min-height: 450px;
}
.service-card:hover { background-color: var(--navy-deep); }
.service-card:hover .card-icon-wrap { background-color: #FFE16D; }
.service-card:hover .card-icon { color: #221B00; }
.service-card:hover .card-title { color: #FFFFFF; }
.service-card:hover .card-item { color: #CBD5E1; }
.service-card:hover .card-img { filter: grayscale(0); }

/* ─── Portfolio overlay ─── */
.portfolio-item .overlay {
  opacity: 0;
  transition: opacity 0.3s ease;
}
.portfolio-item:hover .overlay { opacity: 1; }
.portfolio-item:hover img { transform: scale(1.06); }

/* ─── Glassmorphism nav ─── */
.glass-nav {
  background: rgba(255,255,255,0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(196,198,207,0.4);
}

/* ─── Mobile menu transition ─── */
#mobile-menu {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, opacity 0.25s ease;
  opacity: 0;
}
#mobile-menu.open {
  max-height: 400px;
  opacity: 1;
}

/* ─── Form feedback ─── */
.field-error {
  color: #BA1A1A;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
  display: none;
}
.field-error.visible { display: block; }
.input-drafting.error { border-bottom-color: #BA1A1A; }

/* ─── Toast ─── */
#toast {
  position: fixed;
  bottom: 2rem; right: 2rem;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.35s ease, opacity 0.3s ease;
}
#toast.show {
  transform: translateY(0);
  opacity: 1;
}