/* ============================================================
   MURO CONSTRUCCIONES — Sistema de diseño
   Accesibilidad: WCAG 2.2 AAA
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
  /* Marca */
  --navy-900: #0A1429;
  --navy-800: #0F1B36;
  --navy-700: #16243F;
  --navy-600: #1E3155;
  --steel-500: #3D5A8A;
  --steel-400: #5B7BB1;
  --steel-300: #8FA6C8;
  --steel-200: #C0CEE0;
  --steel-100: #E4EAF3;
  --paper-50: #F5F7FA;
  --paper-100: #ECEFF4;
  --paper-200: #DCE2EA;
  --white: #FFFFFF;
  --blueprint: #0B1E3D;
  --blueprint-line: rgba(143, 166, 200, 0.18);
  --blueprint-line-strong: rgba(143, 166, 200, 0.32);
  --amber: #60a0ff;   /* anotaciones técnicas / acento cálido */
  --amber-strong: #3b97a0;

  /* Texto (AAA contrast sobre fondos) */
  --ink-900: #0A1429;          /* sobre paper-50: 18.5:1 */
  --ink-700: #1F2D4A;          /* sobre paper-50: 12.4:1 */
  --ink-500: #45556F;          /* sobre paper-50: 7.8:1  */
  --ink-400: #5A6B85;          /* sobre white:    6.3:1 (AA grande) */
  --ink-on-dark: #FFFFFF;
  --ink-on-dark-muted: #C0CEE0;

  /* Sistema */
  --success-700: #0F5132;
  --danger-700: #842029;
  --info-700: #084298;

  /* Tipografía */
  --font-display: 'Satoshi', 'Inter', system-ui, sans-serif;
  --font-body: 'Open Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Menlo', monospace;

  /* Escala */
  --fs-12: 0.75rem;
  --fs-13: 0.8125rem;
  --fs-14: 0.875rem;
  --fs-15: 0.9375rem;
  --fs-16: 1rem;
  --fs-18: 1.125rem;
  --fs-20: 1.25rem;
  --fs-24: 1.5rem;
  --fs-30: 1.875rem;
  --fs-36: 2.25rem;
  --fs-48: 3rem;
  --fs-60: 3.75rem;
  --fs-72: 4.5rem;

  /* Radios y sombras */
  --r-sm: 4px;
  --r-md: 8px;
  --r-lg: 14px;
  --r-xl: 22px;
  --shadow-sm: 0 1px 2px rgba(15, 27, 54, 0.06), 0 1px 3px rgba(15, 27, 54, 0.05);
  --shadow-md: 0 4px 12px rgba(15, 27, 54, 0.08), 0 2px 4px rgba(15, 27, 54, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 27, 54, 0.12), 0 4px 12px rgba(15, 27, 54, 0.08);
  --shadow-xl: 0 24px 64px rgba(15, 27, 54, 0.18), 0 8px 24px rgba(15, 27, 54, 0.10);

  /* Layout */
  --container: 1240px;
  --container-narrow: 920px;
  --gutter: clamp(20px, 4vw, 48px);
  --section-y: clamp(64px, 9vw, 128px);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--fs-16);
  line-height: 1.65;
  color: var(--ink-700);
  background: var(--paper-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink-900);
  letter-spacing: -0.02em;
  line-height: 1.12;
  margin: 0;
  text-wrap: balance;
}
p { margin: 0; text-wrap: pretty; }
a { color: var(--steel-500); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--navy-800); }
img, svg { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }
::selection { background: var(--navy-800); color: var(--white); }

/* ---------- Accesibilidad: foco AAA ---------- */
:focus { outline: none; }
:focus-visible {
  outline: 3px solid var(--steel-400);
  outline-offset: 3px;
  border-radius: 2px;
}
.skip-link {
  position: absolute;
  left: -9999px;
  top: 8px;
  background: var(--navy-900);
  color: var(--white);
  padding: 12px 20px;
  border-radius: var(--r-md);
  font-weight: 600;
  z-index: 9999;
}
.skip-link:focus { left: 8px; }
.sr-only {
  position: absolute !important; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 var(--gutter); }
.container-narrow { width: 100%; max-width: var(--container-narrow); margin: 0 auto; padding: 0 var(--gutter); }
.section { padding: var(--section-y) 0; position: relative; }
.section--dark { background: var(--navy-900); color: var(--ink-on-dark); }
.section--dark h1, .section--dark h2, .section--dark h3, .section--dark h4 { color: var(--white); }
.section--paper { background: var(--paper-100);}

.section-video{
  background: url(/assets/background-video.mp4);
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--steel-500);
  margin-bottom: 18px;
}
.eyebrow::before {
  content: '';
  width: 28px; height: 1px;
  background: var(--steel-400);
}
.section--dark .eyebrow { color: var(--steel-300); }
.section--dark .eyebrow::before { background: var(--steel-300); }

.section-title {
  font-size: clamp(28px, 4.4vw, 48px);
  font-weight: 600;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
  max-width: 24ch;
}
.section-lead {
  font-size: clamp(16px, 1.4vw, 19px);
  color: var(--ink-500);
  max-width: 60ch;
  line-height: 1.6;
}
.section--dark .section-lead { color: var(--ink-on-dark-muted); }

/* ---------- Blueprint grid (motivo de fondo) ---------- */
.blueprint-bg {
  position: absolute; inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--blueprint-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
}
.blueprint-bg--strong {
  background-image:
    linear-gradient(var(--blueprint-line-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-line-strong) 1px, transparent 1px),
    linear-gradient(var(--blueprint-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
  background-size: 240px 240px, 240px 240px, 48px 48px, 48px 48px;
}

/* ---------- Botones ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  font-family: var(--font-display);
  font-size: var(--fs-15);
  font-weight: 600;
  letter-spacing: -0.005em;
  border-radius: var(--r-md);
  border: 1.5px solid transparent;
  transition: all 0.22s cubic-bezier(0.2, 0.7, 0.2, 1);
  cursor: pointer;
  white-space: nowrap;
  text-decoration: none;
}
.btn svg { width: 18px; height: 18px; }
.btn--primary {
  background: var(--navy-800);
  color: var(--white);
  border-color: var(--navy-800);
}
.btn--primary:hover {
  background: var(--navy-700);
  border-color: var(--navy-700);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--white);
}
.btn--primary:active { transform: translateY(0); }
.btn--ghost {
  background: transparent;
  color: var(--navy-800);
  border-color: var(--steel-200);
}
.btn--ghost:hover {
  background: var(--white);
  border-color: var(--navy-800);
  color: var(--navy-800);
}
.section--dark .btn--ghost {
  color: var(--white);
  border-color: rgba(255,255,255,0.25);
}
.section--dark .btn--ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: var(--white);
  color: var(--white);
}
.btn--accent {
  background: var(--white);
  color: var(--navy-900);
  border-color: var(--amber);
}
.btn--accent:hover {
  background: var(--blueprint);
  border-color: var(--white);
  color: var(--white);
}
.btn--large { padding: 18px 32px; font-size: var(--fs-16); }
.btn--full { width: 100%; justify-content: center; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky; top: 0; z-index: 80;
  background: rgba(245, 247, 250, 0.86);
  backdrop-filter: saturate(1.4) blur(14px);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid var(--steel-100);
  transition: background 0.2s, border-color 0.2s;
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 1px 0 rgba(15,27,54,0.04), 0 6px 24px rgba(15,27,54,0.04);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 76px;
  gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  text-decoration: none;
  color: var(--ink-900);
}
.brand__icon-img {
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 6px;
  position: relative;
  overflow: hidden;
}
.brand__name {
  display: flex; flex-direction: column; line-height: 1;
  font-family: var(--font-display);
}
.brand__name strong {
  font-weight: 700;
  font-size: var(--fs-18);
  letter-spacing: 0.04em;
  color: var(--navy-800);
}
.brand__name span {
  font-size: 8px;
  letter-spacing: 0.22em;
  color: var(--ink-500);
  text-transform: uppercase;
  margin-top: 3px;
  font-weight: 500;
}

.nav__list {
  display: flex; align-items: center; gap: 4px;
  list-style: none; margin: 0; padding: 0;
}
.nav__link {
  padding: 8px 14px;
  font-size: var(--fs-14);
  font-weight: 500;
  color: var(--ink-700);
  border-radius: var(--r-sm);
  position: relative;
  transition: color 0.2s, background 0.2s;
}
.nav__link:hover { color: var(--navy-800); background: var(--steel-100); }
.nav__link[aria-current="page"] {
  color: var(--navy-800);
  font-weight: 600;
}
.nav__link[aria-current="page"]::after {
  content: '';
  position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; background: var(--amber); border-radius: 1px;
}
.nav__actions { display: flex; align-items: center; gap: 10px; }
.nav__toggle {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid var(--steel-200);
  border-radius: var(--r-md);
  align-items: center; justify-content: center;
}
.nav__toggle svg { width: 20px; height: 20px; }
.nav__toggle[aria-expanded="true"] .icon-menu { display: none; }
.nav__toggle:not([aria-expanded="true"]) .icon-close { display: none; }

@media (max-width: 980px) {
  .nav__toggle { display: inline-flex; }
  .nav__list {
    position: absolute; top: 100%; left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px var(--gutter) 28px;
    gap: 4px;
    border-bottom: 1px solid var(--steel-100);
    box-shadow: var(--shadow-md);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, transform 0.2s, visibility 0s 0.2s;
  }
  .nav__list.is-open {
    transform: translateY(0); opacity: 1; visibility: visible;
    transition: opacity 0.2s, transform 0.2s;
  }
  .nav__list .btn { margin-top: 10px; }
  .nav__link { padding: 14px 16px; font-size: var(--fs-16); border-radius: var(--r-md); }
  .nav__cta-desktop { display: none; }
}
@media (min-width: 981px) {
  .nav__cta-mobile { display: none; }
}

/* ---------- WhatsApp flotante ---------- */
.wa-fab {
  position: fixed; right: 22px; bottom: 22px;
  z-index: 70;
  width: 60px; height: 60px;
  background: #25D366;
  color: var(--white);
  border: none;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 10px 30px rgba(37, 211, 102, 0.4), 0 4px 12px rgba(0,0,0,0.12);
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}
.wa-fab:hover {
  transform: scale(1.06);
  color: var(--white);
  box-shadow: 0 14px 36px rgba(37, 211, 102, 0.5);
}
.wa-fab svg { width: 32px; height: 32px; }
.wa-fab::before {
  content: '';
  position: absolute; inset: -4px;
  border-radius: 50%;
  background: #25D366;
  opacity: 0.3;
  animation: wa-pulse 2.4s ease-out infinite;
  z-index: -1;
}
@keyframes wa-pulse {
  0% { transform: scale(1); opacity: 0.4; }
  100% { transform: scale(1.4); opacity: 0; }
}
.wa-fab__tooltip {
  position: absolute;
  right: calc(100% + 14px); top: 50%;
  transform: translateY(-50%);
  background: var(--navy-900);
  color: var(--white);
  padding: 10px 16px;
  border-radius: var(--r-md);
  font-size: var(--fs-13);
  font-weight: 500;
  white-space: nowrap;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  box-shadow: var(--shadow-md);
}
.wa-fab__tooltip::after {
  content: '';
  position: absolute; left: 100%; top: 50%; transform: translateY(-50%);
  border: 6px solid transparent;
  border-left-color: var(--navy-900);
}
.wa-fab:hover .wa-fab__tooltip,
.wa-fab:focus-visible .wa-fab__tooltip {
  opacity: 1; transform: translateY(-50%) translateX(-4px);
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--navy-900);
  color: var(--ink-on-dark-muted);
  padding: 80px 0 36px;
  position: relative;
  overflow: hidden;
}
.site-footer .blueprint-bg { opacity: 0.5; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 48px;
  margin-bottom: 56px;
  position: relative;
}
.footer__brand h3 {
  color: var(--white);
  font-size: var(--fs-20);
  margin-bottom: 12px;
}
.footer__brand p {
  font-size: var(--fs-14);
  line-height: 1.7;
  max-width: 36ch;
  color: var(--ink-on-dark-muted);
}
.footer__col h4 {
  color: var(--white);
  font-size: var(--fs-13);
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer__col ul { list-style: none; padding: 0; margin: 0; }
.footer__col li { margin-bottom: 10px; }
.footer__col a {
  color: var(--ink-on-dark-muted);
  font-size: var(--fs-14);
}
.footer__col a:hover { color: var(--white); }
.footer__contact-item {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: var(--fs-14);
  margin-bottom: 10px;
  color: var(--ink-on-dark-muted);
}
.footer__contact-item svg { flex: none; width: 16px; height: 16px; margin-top: 4px; color: var(--steel-300); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 28px;
  display: flex; justify-content: space-between; align-items: center;
  gap: 24px;
  font-size: var(--fs-13);
  flex-wrap: wrap;
  position: relative;
}
.footer__legal {
  display: flex; gap: 24px; flex-wrap: wrap;
}
.footer__legal a { color: var(--ink-on-dark-muted); }
.footer__legal a:hover { color: var(--white); }
@media (max-width: 820px) {
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer__brand { grid-column: 1 / -1; }
}
@media (max-width: 520px) {
  .footer__grid { grid-template-columns: 1fr; }
}

/* ---------- Cards genéricas ---------- */
.card {
  background: var(--white);
  border: 1px solid var(--steel-100);
  border-radius: var(--r-lg);
  padding: 28px;
  transition: transform 0.25s, box-shadow 0.25s, border-color 0.25s;
}
.card:hover {
  transform: translateY(-2px);
  border-color: var(--steel-200);
  box-shadow: var(--shadow-md);
}

/* ---------- Forms ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 18px; }
.field label, .field__label {
  font-size: var(--fs-13);
  font-weight: 600;
  color: var(--ink-700);
  letter-spacing: 0.01em;
}
.field__hint { font-size: var(--fs-12); color: var(--ink-500); }
.field input[type="text"],
.field input[type="email"],
.field input[type="tel"],
.field input[type="number"],
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit;
  font-size: var(--fs-15);
  color: var(--ink-900);
  background: var(--white);
  border: 1.5px solid var(--steel-200);
  border-radius: var(--r-md);
  transition: border-color 0.15s, box-shadow 0.15s, background 0.15s;
}
.field input:hover, .field select:hover, .field textarea:hover { border-color: var(--steel-300); }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--navy-800);
  box-shadow: 0 0 0 4px rgba(15, 27, 54, 0.12);
  outline: none;
}
.field textarea { min-height: 110px; resize: vertical; }
.field__row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 640px) { .field__row { grid-template-columns: 1fr; } }

.field__error {
  font-size: var(--fs-12); color: var(--danger-700); font-weight: 500;
  display: none;
}
.field.is-invalid input, .field.is-invalid select, .field.is-invalid textarea {
  border-color: var(--danger-700);
  box-shadow: 0 0 0 3px rgba(132,32,41,0.12);
}
.field.is-invalid .field__error { display: block; }

.required { color: var(--amber-strong); font-weight: 700; }

/* Radio cards */
.radio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 10px;
}
.radio-card {
  position: relative;
  display: flex; flex-direction: column; gap: 4px;
  padding: 16px 16px 16px 46px;
  background: var(--white);
  border: 1.5px solid var(--steel-200);
  border-radius: var(--r-md);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
}
.radio-card input {
  position: absolute; left: 16px; top: 18px;
  width: 18px; height: 18px;
  accent-color: var(--navy-800);
}
.radio-card:hover { border-color: var(--steel-400); }
.radio-card:has(input:checked) {
  border-color: var(--navy-800);
  background: var(--paper-100);
  box-shadow: 0 0 0 3px rgba(15, 27, 54, 0.06);
}
.radio-card strong {
  font-family: var(--font-display);
  font-size: var(--fs-15);
  font-weight: 600; color: var(--ink-900);
}
.radio-card span {
  font-size: var(--fs-13); color: var(--ink-500); line-height: 1.5;
}

/* Checkbox legal */
.check {
  display: flex; gap: 10px; align-items: flex-start;
  font-size: var(--fs-13); color: var(--ink-500); line-height: 1.55;
}
.check input { width: 18px; height: 18px; margin-top: 2px; accent-color: var(--navy-800); flex: none; }

/* ---------- Animaciones de entrada ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.7s ease-out, transform 0.7s cubic-bezier(0.2, 0.7, 0.2, 1);
}
[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Toast / aria-live ---------- */
.toast {
  position: fixed; bottom: 100px; right: 22px; z-index: 90;
  background: var(--navy-900);
  color: var(--white);
  padding: 16px 22px;
  border-radius: var(--r-md);
  box-shadow: var(--shadow-lg);
  font-size: var(--fs-14);
  max-width: 340px;
  display: flex; align-items: flex-start; gap: 12px;
  transform: translateX(120%);
  transition: transform 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.toast.is-visible { transform: translateX(0); }
.toast svg { width: 20px; height: 20px; color: #34D399; flex: none; margin-top: 2px; }
.toast strong { display: block; font-family: var(--font-display); font-weight: 600; margin-bottom: 2px; }
.toast span { color: var(--ink-on-dark-muted); font-size: var(--fs-13); }

/* ---------- Modal ---------- */
.modal {
  position: fixed; inset: 0; z-index: 100;
  display: none; align-items: center; justify-content: center;
  padding: 20px;
  background: rgba(10, 20, 41, 0.7);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.modal.is-open { display: flex; }
.modal__panel {
  background: var(--white);
  border-radius: var(--r-xl);
  max-width: 560px; width: 100%;
  max-height: calc(100vh - 40px);
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
  padding: 36px;
  position: relative;
  animation: modal-in 0.3s cubic-bezier(0.2, 0.7, 0.2, 1);
}
@keyframes modal-in {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}
.modal__close {
  position: absolute; top: 14px; right: 14px;
  width: 40px; height: 40px;
  background: transparent;
  border: none;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  color: var(--ink-500);
}
.modal__close:hover { background: var(--paper-100); color: var(--ink-900); }
.modal__close svg { width: 20px; height: 20px; }
.modal__eyebrow { font-size: var(--fs-12); color: var(--steel-500); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.14em; margin-bottom: 12px; }
.modal h3 { font-size: var(--fs-24); margin-bottom: 8px; }
.modal p { color: var(--ink-500); font-size: var(--fs-14); margin-bottom: 22px; }

/* ---------- Badges / tags ---------- */
.tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--steel-100);
  color: var(--steel-500);
  border-radius: 100px;
}
.tag--amber { background: rgba(200,156,92,0.15); color: var(--amber-strong); }
.tag--success { background: rgba(15,81,50,0.10); color: var(--success-700); }
.tag--dark { background: rgba(255,255,255,0.08); color: var(--ink-on-dark-muted); }

/* ---------- Misc ---------- */
.divider {
  height: 1px;
  background: var(--steel-100);
  border: 0;
  margin: 0;
}
.text-amber { color: var(--amber-strong); }