/* ============================================================
   DIGANEXIA — style.css
   Sistema de diseño extraído del logo:
   - Fondo: navy oscuro (#0b0f1e)
   - Primario: azul eléctrico (#4f72f8)
   - Acento: violeta (#8b5cf6)
   - Texto: blanco / gris claro
   ============================================================ */

:root {
  --color-bg:       #0b0f1e;
  --color-surface:  #111627;
  --color-primary:  #4f72f8;
  --color-accent:   #8b5cf6;
  --color-text:     #f0f4ff;
  --color-muted:    #8892aa;
  --color-border:   #1e2740;

  --font-heading: 'Sora', sans-serif;
  --font-body:    'Inter', sans-serif;

  --section-padding: 6rem 1.5rem;
  --max-width: 1100px;

  --radius: 0.75rem;
  --transition: 0.25s ease;
}

/* ============================================================
   RESET & BASE
   ============================================================ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 72px; /* compensa la navbar fija */
  font-size: 16px;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* Focus visible — navegación por teclado (WCAG AA) */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

ol, ul {
  list-style: none;
}

/* ============================================================
   UTILITY
   ============================================================ */

.section-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--section-padding);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-header h2 {
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  color: var(--color-muted);
  font-size: 1.1rem;
  max-width: 520px;
  margin: 0 auto;
}

/* ============================================================
   BUTTONS
   ============================================================ */

.btn-primary {
  display: inline-block;
  padding: 0.85rem 2rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  letter-spacing: 0.02em;
}

.btn-primary:hover {
  opacity: 0.88;
  transform: translateY(-2px);
}

/* ============================================================
   NAVBAR
   ============================================================ */

#navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 1rem 1.5rem;
  transition: background var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(11, 15, 30, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--color-border);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo img {
  height: 36px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-links .btn-nav {
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  padding: 0.4rem 1rem;
  border-radius: var(--radius);
  transition: background var(--transition), color var(--transition);
}

.nav-links .btn-nav:hover {
  background: var(--color-primary);
  color: #fff;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

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

/* ============================================================
   HERO
   ============================================================ */

#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8rem 1.5rem 5rem;
  position: relative;
  overflow: hidden;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 700px;
}

#hero h1 {
  font-family: var(--font-heading);
  font-size: clamp(3rem, 10vw, 6rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1;
  background: linear-gradient(135deg, var(--color-text) 40%, var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-family: var(--font-heading);
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.hero-body {
  color: var(--color-muted);
  font-size: 1.05rem;
  max-width: 520px;
  margin: 0 auto 2.5rem;
}

/* Patrón de fondo geométrico — CSS puro */
.hero-bg-pattern {
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(79, 114, 248, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.10) 0%, transparent 50%);
  pointer-events: none;
}

/* ============================================================
   SERVICIOS
   ============================================================ */

#servicios {
  background: var(--color-surface);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: border-color var(--transition), transform var(--transition);
}

.service-card:hover {
  border-color: var(--color-primary);
  transform: translateY(-4px);
}

.service-card h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
}

.service-card p {
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ============================================================
   ÍCONOS DE TARJETAS
   ============================================================ */

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 1.25rem;
  color: var(--color-primary);
}

.card-icon svg {
  width: 100%;
  height: 100%;
}

/* ============================================================
   PROCESO (TIMELINE)
   ============================================================ */

#proceso {
  background: var(--color-bg);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  max-width: 680px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 2rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.timeline-step {
  display: flex;
  gap: 2rem;
  padding: 0 0 2.5rem 0;
  position: relative;
}

.step-number {
  flex-shrink: 0;
  width: 4rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: 50%;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 0.9rem;
  color: #fff;
  position: relative;
  z-index: 1;
}

.step-content h3 {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.4rem;
  padding-top: 0.75rem;
}

.step-content p {
  color: var(--color-muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

/* ============================================================
   POR QUÉ ELEGIRNOS
   ============================================================ */

#por-que {
  background: var(--color-surface);
}

.reasons-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.reason-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 2rem 1.5rem;
  transition: border-color var(--transition);
}

.reason-card:hover {
  border-color: var(--color-accent);
}

.reason-card h3 {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.reason-card p {
  color: var(--color-muted);
  font-size: 0.88rem;
  line-height: 1.6;
}

.reason-card .card-icon {
  color: var(--color-accent);
}

/* ============================================================
   CONTACTO
   ============================================================ */

#contacto {
  background: var(--color-bg);
}

.contact-wrapper {
  max-width: 580px;
  margin: 0 auto;
}

#contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-muted);
}

.form-group input,
.form-group textarea {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: calc(var(--radius) * 0.75);
  padding: 0.75rem 1rem;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color var(--transition);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--color-muted);
  opacity: 0.6;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(79, 114, 248, 0.2);
}

.btn-submit {
  align-self: flex-start;
  font-size: 1rem;
  padding: 0.9rem 2.5rem;
}

.form-feedback {
  font-size: 0.9rem;
  padding: 0.75rem 1rem;
  border-radius: calc(var(--radius) * 0.75);
  margin-top: 0.5rem;
}

.form-success {
  background: rgba(79, 114, 248, 0.1);
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.form-error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid #ef4444;
  color: #ef4444;
}

/* ============================================================
   FOOTER
   ============================================================ */

#footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 2.5rem 1.5rem;
}

.footer-container {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-brand img {
  height: 32px;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--color-muted);
  font-size: 0.875rem;
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--color-text);
}

.footer-social a {
  color: var(--color-muted);
  display: flex;
  transition: color var(--transition);
}

.footer-social a:hover {
  color: var(--color-primary);
}

.footer-social svg {
  width: 20px;
  height: 20px;
}

.footer-copy {
  width: 100%;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.8rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* ============================================================
   ANIMACIONES (IntersectionObserver)
   ============================================================ */

.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================================================
   ACCESIBILIDAD — prefers-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;
  }

  .fade-in {
    opacity: 1;
    transform: none;
  }
}

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    z-index: 99;
  }

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

  .nav-links a {
    font-size: 1.25rem;
  }

  .hamburger {
    display: flex;
    position: relative;
    z-index: 101;
  }

  .timeline::before {
    left: 1.75rem;
  }

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

  .footer-copy {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .btn-submit {
    align-self: stretch;
    text-align: center;
  }

  .services-grid,
  .reasons-grid {
    grid-template-columns: 1fr;
  }
}