/* ==========================================================================
   Asistema — Sistema de diseño
   Tokens, layout, componentes. Una sola fuente de verdad.
   ========================================================================== */

/* --- Tokens --- */
:root {
  --color-primary: #1a365d;
  --color-primary-light: #2b6cb0;
  --color-primary-dark: #102a4a;
  --color-accent: #3182ce;
  --color-accent-light: #ebf8ff;
  --color-cta: #dd6b20;
  --color-cta-hover: #c05621;
  --color-text: #2d3748;
  --color-text-light: #718096;
  --color-bg: #ffffff;
  --color-bg-alt: #f7fafc;
  --color-border: #e2e8f0;
  --color-success: #38a169;
  --color-error: #e53e3e;

  --font-main: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --max-width: 1140px;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.06);
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.07), 0 2px 4px rgba(0,0,0,.06);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.1);
  --transition: .25s ease;
}

/* --- Reset y base --- */
*,
*::before,
*::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary-light); }
ul, ol { list-style: none; }

h1, h2, h3, h4 {
  font-family: var(--font-main);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
}
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.25rem; }

/* --- Utilidades --- */
.contenedor {
  width: 100%;
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

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

.seccion {
  padding-block: 5rem;
}

.seccion__titulo {
  text-align: center;
  margin-bottom: .75rem;
}

.seccion__subtitulo {
  text-align: center;
  color: var(--color-text-light);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: 3rem;
  font-size: 1.1rem;
}

.seccion--alt {
  background: var(--color-bg-alt);
}

/* --- Botones --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .8rem 1.75rem;
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.4;
}

.btn--primary {
  background: var(--color-cta);
  color: #fff;
  border-color: var(--color-cta);
}
.btn--primary:hover {
  background: var(--color-cta-hover);
  border-color: var(--color-cta-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn--outline {
  background: transparent;
  color: #fff;
  border-color: #fff;
}
.btn--outline:hover {
  background: #fff;
  color: var(--color-primary);
}

.btn--secondary {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}
.btn--secondary:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary-light);
  color: #fff;
}

/* --- Header / Navegación --- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
.header--scrolled {
  box-shadow: var(--shadow-md);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-primary);
  text-decoration: none;
  letter-spacing: -.02em;
}
.header__logo:hover { color: var(--color-primary); }

.header__logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: .95rem;
}

.nav__lista {
  display: flex;
  align-items: center;
  gap: .25rem;
}

.nav__enlace {
  display: block;
  padding: .5rem 1rem;
  font-weight: 500;
  font-size: .95rem;
  color: var(--color-text);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.nav__enlace:hover,
.nav__enlace[aria-current="page"] {
  color: var(--color-accent);
  background: var(--color-accent-light);
}

.nav__cta {
  margin-left: .5rem;
}

/* Menú móvil */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: .5rem;
  color: var(--color-primary);
}
.menu-toggle svg { width: 28px; height: 28px; }

@media (max-width: 768px) {
  .menu-toggle { display: block; }

  .nav {
    position: fixed;
    inset: 72px 0 0 0;
    background: var(--color-bg);
    transform: translateX(100%);
    transition: transform var(--transition);
    padding: 2rem 1.5rem;
    border-top: 1px solid var(--color-border);
    overflow-y: auto;
  }
  .nav--open {
    transform: translateX(0);
  }

  .nav__lista {
    flex-direction: column;
    gap: .5rem;
    align-items: stretch;
  }
  .nav__enlace {
    font-size: 1.1rem;
    padding: .75rem 1rem;
  }
  .nav__cta {
    margin-left: 0;
    margin-top: .5rem;
  }
  .nav__cta .btn {
    width: 100%;
    justify-content: center;
  }
}

/* --- Hero --- */
.hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 50%, #0c1f33 100%);
  color: #fff;
  padding-block: 6rem 5rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(49,130,206,.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(43,108,176,.12) 0%, transparent 40%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  max-width: 720px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.15);
  border-radius: 100px;
  padding: .35rem 1rem;
  font-size: .85rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.hero__titulo {
  color: #fff;
  margin-bottom: 1.25rem;
  font-size: clamp(2.25rem, 5.5vw, 3.25rem);
}

.hero__texto {
  font-size: 1.15rem;
  line-height: 1.8;
  opacity: .9;
  margin-bottom: 2rem;
  max-width: 580px;
}

.hero__acciones {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

/* Elemento firma: línea de acento con gradiente */
.linea-acento {
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-cta), var(--color-accent));
  border-radius: 2px;
  margin-bottom: 1.5rem;
}

.linea-acento--center {
  margin-inline: auto;
}

/* --- Tarjetas de servicio --- */
.servicios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}

.servicio-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  transition: all var(--transition);
}
.servicio-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.servicio-card__icono {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.25rem;
  font-size: 1.5rem;
}

.servicio-card__titulo {
  margin-bottom: .5rem;
}

.servicio-card__texto {
  color: var(--color-text-light);
  font-size: .95rem;
  line-height: 1.7;
}

/* --- CTA Banner --- */
.cta-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 3.5rem 2.5rem;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(255,255,255,.07) 0%, transparent 60%);
  pointer-events: none;
}

.cta-banner h2 { color: #fff; margin-bottom: .75rem; position: relative; }
.cta-banner p {
  opacity: .9;
  max-width: 500px;
  margin-inline: auto;
  margin-bottom: 2rem;
  font-size: 1.1rem;
  position: relative;
}

/* --- Formulario de contacto --- */
.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 768px) {
  .contacto-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

.contacto-info__item {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.75rem;
}

.contacto-info__icono {
  width: 44px;
  height: 44px;
  min-width: 44px;
  border-radius: 10px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
}

.contacto-info__label {
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: .15rem;
}
.contacto-info__dato {
  color: var(--color-text-light);
  font-size: .95rem;
}

.form-contacto {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-grupo {
  display: flex;
  flex-direction: column;
  gap: .35rem;
}

.form-grupo label {
  font-weight: 600;
  font-size: .9rem;
  color: var(--color-primary);
}

.form-grupo input,
.form-grupo textarea {
  font-family: var(--font-main);
  font-size: 1rem;
  padding: .75rem 1rem;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
}

.form-grupo input:focus,
.form-grupo textarea:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(49,130,206,.12);
}

.form-grupo textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 480px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-mensaje {
  padding: 1rem 1.25rem;
  border-radius: var(--radius);
  font-size: .95rem;
  font-weight: 500;
}
.form-mensaje--ok {
  background: #f0fff4;
  color: var(--color-success);
  border: 1px solid #c6f6d5;
}
.form-mensaje--error {
  background: #fff5f5;
  color: var(--color-error);
  border: 1px solid #fed7d7;
}

/* --- Footer --- */
.footer {
  background: var(--color-primary);
  color: rgba(255,255,255,.8);
  padding-block: 3rem 1.5rem;
}

.footer__inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer__marca {
  max-width: 320px;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: .75rem;
  text-decoration: none;
}
.footer__logo:hover { color: #fff; }

.footer__desc {
  font-size: .9rem;
  line-height: 1.7;
  opacity: .7;
}

.footer__col h4 {
  color: #fff;
  font-size: .95rem;
  margin-bottom: 1rem;
  font-weight: 600;
}

.footer__col a {
  display: block;
  color: rgba(255,255,255,.7);
  font-size: .9rem;
  padding-block: .3rem;
  transition: color var(--transition);
}
.footer__col a:hover { color: #fff; }

.footer__copy {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 1.5rem;
  text-align: center;
  font-size: .85rem;
  opacity: .6;
}

/* --- Página de servicios detallada --- */
.pagina-hero {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding-block: 4rem 3rem;
  text-align: center;
}
.pagina-hero h1 { color: #fff; margin-bottom: .5rem; }
.pagina-hero p { opacity: .85; font-size: 1.1rem; }

.servicio-detalle {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: start;
  padding: 2.5rem;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: 1.5rem;
  transition: all var(--transition);
}
.servicio-detalle:hover {
  box-shadow: var(--shadow-md);
  border-color: transparent;
}

.servicio-detalle__icono {
  width: 60px;
  height: 60px;
  border-radius: 14px;
  background: var(--color-accent-light);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}

.servicio-detalle__titulo {
  margin-bottom: .4rem;
}
.servicio-detalle__texto {
  color: var(--color-text-light);
  line-height: 1.7;
}

.servicio-detalle__lista {
  margin-top: .75rem;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
}
.servicio-detalle__tag {
  background: var(--color-accent-light);
  color: var(--color-accent);
  padding: .25rem .75rem;
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 500;
}

@media (max-width: 600px) {
  .servicio-detalle {
    grid-template-columns: 1fr;
    padding: 1.5rem;
  }
}

/* --- Animaciones suaves --- */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .6s ease, transform .6s ease;
  }
  .fade-up--visible {
    opacity: 1;
    transform: translateY(0);
  }
}
@media (prefers-reduced-motion: reduce) {
  .fade-up { opacity: 1; transform: none; }
}