/* ============================================================
   ESTÁNDAR INGENIEROS — Base Styles (Typography + Layout)
   ============================================================ */

/* ── Container ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--sm  { max-width: var(--container-sm); }
.container--md  { max-width: var(--container-md); }
.container--lg  { max-width: var(--container-lg); }
.container--xl  { max-width: var(--container-xl); }

/* ── Section Spacing ───────────────────────────────────────── */
.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-24));
}

.section--sm {
  padding-block: clamp(var(--space-10), 5vw, var(--space-16));
}

.section--lg {
  padding-block: clamp(var(--space-20), 10vw, var(--space-32));
}

/* ── Section Header ────────────────────────────────────────── */
.section-header {
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.section-header--center {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: var(--space-3);
}

.section-tag::before {
  content: '';
  display: inline-block;
  width: 20px;
  height: 2px;
  background: var(--color-orange);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-4xl));
  font-weight: var(--weight-extrabold);
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
}

.section-subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-md));
  color: var(--color-text-secondary);
  line-height: var(--leading-relaxed);
  max-width: 640px;
}

.section-header--center .section-subtitle {
  margin-inline: auto;
}

/* ── Typography Utilities ──────────────────────────────────── */
.text-orange  { color: var(--color-orange); }
.text-red     { color: var(--color-red); }
.text-muted   { color: var(--color-text-muted); }
.text-white   { color: var(--color-white); }

.font-semibold { font-weight: var(--weight-semibold); }
.font-bold     { font-weight: var(--weight-bold); }

.text-center { text-align: center; }
.text-left   { text-align: left; }

/* ── Grid Utilities ────────────────────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.grid-3 {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.grid-4 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

@media (min-width: 640px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

@media (min-width: 1024px) {
  .grid-3 {
    grid-template-columns: repeat(3, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* ── Flex Utilities ────────────────────────────────────────── */
.flex        { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between{ display: flex; align-items: center; justify-content: space-between; }
.flex-col    { display: flex; flex-direction: column; }
.gap-2       { gap: var(--space-2); }
.gap-3       { gap: var(--space-3); }
.gap-4       { gap: var(--space-4); }
.gap-6       { gap: var(--space-6); }
.gap-8       { gap: var(--space-8); }

/* ── Background Utilities ──────────────────────────────────── */
.bg-white   { background-color: var(--color-bg-white); }
.bg-light   { background-color: var(--color-bg-light); }
.bg-section { background-color: var(--color-bg-section); }
.bg-dark    { background-color: var(--color-bg-header); }
.bg-orange  { background-color: var(--color-orange); }

/* ── Divider ───────────────────────────────────────────────── */
.divider {
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-orange), var(--color-red));
  border-radius: var(--radius-full);
  margin-bottom: var(--space-6);
}

.divider--center {
  margin-inline: auto;
}

/* ── Highlight ─────────────────────────────────────────────── */
.highlight {
  position: relative;
  white-space: nowrap;
}

.highlight::after {
  content: '';
  position: absolute;
  bottom: 0.05em;
  left: 0;
  right: 0;
  height: 0.12em;
  background: linear-gradient(90deg, var(--color-orange), var(--color-red));
  border-radius: 2px;
  z-index: -1;
}

/* ── Breadcrumb ────────────────────────────────────────────── */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-block: var(--space-3);
}

.breadcrumb__link {
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
}

.breadcrumb__link:hover {
  color: var(--color-orange);
}

.breadcrumb__sep {
  color: var(--color-border-medium);
  font-size: var(--text-xs);
}

.breadcrumb__current {
  color: var(--color-text-secondary);
  font-weight: var(--weight-medium);
}

/* ── Page Hero (inner pages) ───────────────────────────────── */
.page-hero {
  background-color: var(--color-bg-header);
  padding-block: clamp(var(--space-12), 6vw, var(--space-20));
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(243,146,0,0.08) 0%, transparent 60%);
  pointer-events: none;
}

.page-hero__content {
  position: relative;
  z-index: 1;
}

.page-hero__tag {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-orange);
  margin-bottom: var(--space-3);
}

.page-hero__title {
  font-size: clamp(var(--text-2xl), 4vw, var(--text-5xl));
  font-weight: var(--weight-extrabold);
  color: var(--color-white);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  margin-bottom: var(--space-4);
}

.page-hero__subtitle {
  font-size: clamp(var(--text-base), 2vw, var(--text-lg));
  color: rgba(255,255,255,0.72);
  max-width: 640px;
  line-height: var(--leading-relaxed);
}

/* ── Decorative Line ───────────────────────────────────────── */
.deco-line {
  display: inline-block;
  width: 40px;
  height: 3px;
  background: var(--color-orange);
  border-radius: var(--radius-full);
  vertical-align: middle;
}

/* ── Visually hidden (accessibility) ──────────────────────── */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border-width: 0;
}

/* ── Animations ────────────────────────────────────────────── */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-24px); }
  to   { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.6; }
}

.animate-fade-up   { animation: fadeInUp 0.6s ease both; }
.animate-fade-in   { animation: fadeIn 0.5s ease both; }
.animate-slide-left{ animation: slideInLeft 0.6s ease both; }

.delay-100 { animation-delay: 0.10s; }
.delay-200 { animation-delay: 0.20s; }
.delay-300 { animation-delay: 0.30s; }
.delay-400 { animation-delay: 0.40s; }
.delay-500 { animation-delay: 0.50s; }

/* Intersection Observer — reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-left {
  opacity: 0;
  transform: translateX(-28px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal-left.is-visible {
  opacity: 1;
  transform: translateX(0);
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ── Utility: margin helpers ───────────────────────────────── */
.mt-0 { margin-top: 0; }
.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mb-0 { margin-bottom: 0; }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

/* ── Badge ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-3);
  font-size: var(--text-xs);
  font-weight: var(--weight-semibold);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  border-radius: var(--radius-full);
}

.badge--orange {
  background: rgba(243,146,0,0.12);
  color: var(--color-orange-dark);
}

.badge--red {
  background: rgba(190,22,34,0.10);
  color: var(--color-red);
}

.badge--gray {
  background: var(--color-bg-section);
  color: var(--color-text-secondary);
}

/* ── Image placeholder ─────────────────────────────────────── */
.img-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-gray-dark) 0%, #4A4A49 100%);
  color: rgba(255,255,255,0.3);
  overflow: hidden;
  position: relative;
}

.img-placeholder::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(243,146,0,0.08) 0%, rgba(190,22,34,0.05) 100%);
}

/* ── Whatsapp Floating Button ──────────────────────────────── */
.whatsapp-float {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: var(--z-sticky);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: #25D366;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(37,211,102,0.4);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  animation: pulse 2.5s ease-in-out infinite;
}

.whatsapp-float:hover {
  transform: scale(1.08);
  box-shadow: 0 6px 28px rgba(37,211,102,0.5);
  animation: none;
}

.whatsapp-float svg {
  width: 28px;
  height: 28px;
  fill: #FFFFFF;
}

@media (max-width: 768px) {
  .whatsapp-float {
    bottom: var(--space-4);
    right: var(--space-4);
  }
}