/* Atalaya Studio CSS Optimizado | Mobile-first | Critical CSS | Performance */

/* CSS Custom Properties (orden alfabético para mejor cache) */
:root {
  --border-radius: 12px;
  --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --box-shadow-hover: 0 12px 40px rgba(108, 92, 231, 0.2);
  --primary: #6c5ce7;
  --primary-dark: #5a4ad1;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);

  /* Espaciado consistente */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2.5rem;
  --space-xl: 4rem;

  /* Tipografía */
  --font-size-xs: clamp(0.75rem, 1vw, 0.875rem);
  --font-size-sm: clamp(0.875rem, 1.5vw, 1rem);
  --font-size-base: clamp(1rem, 2vw, 1.125rem);
  --font-size-lg: clamp(1.125rem, 2.5vw, 1.25rem);
  --font-size-xl: clamp(1.5rem, 4vw, 2rem);

  /* Colores neutros */
  --text-dark: #1a1a1a;
  --text-light: #6b7280;
  --bg-light: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
}

/* Dark mode */
.dark-mode {
  --text-dark: #f1f5f9;
  --text-light: #94a3b8;
  --bg-light: #0f172a;
  --surface: #1e293b;
  --border: #334155;
  color-scheme: dark;
}

/* Reset y base mobile-first */
*,
*::before,
*::after {
  box-sizing: border-box;
}

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family:
    system-ui,
    -apple-system,
    "Inter",
    sans-serif;
  color: var(--text-dark);
  background: var(--bg-light);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 6px;
  background: var(--primary);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  text-decoration: none;
  border-radius: var(--border-radius);
  z-index: 1000;
  transition: top 0.3s;
}

.skip-link:focus {
  top: 6px;
}

/* Container */
.container {
  width: min(100% - 2rem, 1100px);
  margin-inline: auto;
  padding-inline: clamp(1rem, 5vw, 2rem);
}

/* Tipografía mejorada */
h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

h1 {
  font-size: var(--font-size-xl);
}
h2 {
  font-size: clamp(1.75rem, 5vw, 2.5rem);
}
h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
}

p {
  margin-bottom: var(--space-md);
  color: var(--text-light);
}

/* Navbar optimizado */
#main-navbar {
  position: fixed;
  top: 0;
  width: 100%;
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid var(--border);
  z-index: 100;
  transition: var(--transition);
}

#main-navbar.scrolled {
  box-shadow: var(--box-shadow);
}

.navbar-brand.logo {
  font-size: clamp(1.125rem, 4vw, 1.5rem);
  font-weight: 800;
  color: var(--text-dark);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.logo span {
  color: var(--primary);
  font-size: 1.2em;
}

.nav-link {
  font-weight: 600;
  color: var(--text-dark);
  text-decoration: none;
  position: relative;
  padding: var(--space-xs) var(--space-sm);
  transition: var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}

.nav-link:hover::after,
.nav-link:focus::after {
  width: 80%;
}

#theme-toggle {
  transition: var(--transition);
  border-color: var(--primary);
}

#theme-toggle:hover,
#theme-toggle:focus-visible {
  background: var(--primary);
  transform: rotate(180deg);
}

/* Hero optimizado */
.hero {
  padding-block: clamp(120px, 25vh, 200px) var(--space-xl);
  background: var(--bg-light);
  min-height: clamp(80vh, 100vh, 95vh);
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      circle at 20% 30%,
      rgba(108, 92, 231, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      circle at 80% 80%,
      rgba(108, 92, 231, 0.05) 0%,
      transparent 50%
    );
  pointer-events: none;
}

/* Gradiente texto hero */
.hero h1 {
  background: linear-gradient(var(--text-dark) 30%, var(--primary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Botones optimizados */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: clamp(0.875rem, 2vw, 1rem) clamp(1.5rem, 4vw, 2rem);
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: var(--transition);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: var(--primary);
  color: white;
  box-shadow: var(--box-shadow);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--box-shadow-hover);
}

.btn-outline-primary {
  color: var(--primary);
  border-color: var(--primary);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus-visible {
  background: var(--primary);
  color: white;
  transform: translateY(-2px);
}

/* Cards servicios */
.servicio-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  text-align: center;
  height: 100%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.servicio-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--primary-dark));
  transform: scaleX(0);
  transition: transform 0.4s ease;
}

.servicio-card:hover::before {
  transform: scaleX(1);
}

.servicio-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--box-shadow-hover);
}

.servicio-card .icono {
  font-size: clamp(2rem, 8vw, 3.5rem);
  margin-bottom: var(--space-md);
}

.servicio-card h3 {
  color: var(--text-dark);
  margin-bottom: var(--space-sm);
}

/* Testimonios grid */
.testimonios-grid {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.testimonio {
  background: var(--surface);
  padding: var(--space-lg);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  box-shadow: var(--box-shadow);
}

.testimonio blockquote {
  font-style: italic;
  margin-bottom: var(--space-md);
  line-height: 1.7;
}

.testimonio cite {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
}

.avatar {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: var(--font-size-sm);
  flex-shrink: 0;
}

/* Form optimizado */
form {
  background: var(--surface);
  padding: clamp(1.5rem, 5vw, 2.5rem);
  border-radius: var(--border-radius);
  border: 1px solid var(--border);
  box-shadow: var(--box-shadow);
}

.form-label {
  font-weight: 600;
  margin-bottom: var(--space-xs);
  display: block;
}

.form-control {
  padding: var(--space-sm);
  border: 2px solid var(--border);
  border-radius: calc(var(--border-radius) / 2);
  font-size: var(--font-size-base);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.1);
}

.form-control.is-valid {
  border-color: #10b981;
}

.form-control.is-invalid {
  border-color: #ef4444;
}

/* Loader spinner */
.loader {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding-block: var(--space-xl);
  color: var(--text-light);
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: var(--space-sm);
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

.mensaje-exito {
  background: #d1fae5;
  border: 1px solid #10b981;
  color: #065f46;
  padding: var(--space-md);
  border-radius: calc(var(--border-radius) / 2);
  margin-top: var(--space-md);
  display: none;
}

.mensaje-exito.show {
  display: block;
  animation: slideDown 0.3s ease;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Footer */
footer {
  background: var(--text-dark);
  color: var(--text-light);
  padding-block: var(--space-xl);
}

footer .container {
  display: grid;
  gap: var(--space-lg);
  grid-template-columns: 1fr;
}

.footer-bottom {
  padding-top: var(--space-lg);
  border-top: 1px solid var(--border);
  font-size: var(--font-size-xs);
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
  align-items: center;
  text-align: center;
}

/* Animaciones reducidas (solo esenciales) */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive mejorado con container queries y clamp */
@media (min-width: 576px) {
  footer .container {
    grid-template-columns: 2fr 1fr;
    align-items: start;
    text-align: left;
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 768px) {
  .hero {
    padding-block-start: clamp(160px, 20vh, 220px);
  }

  .contacto-grid {
    grid-template-columns: 1fr 350px;
  }
}

@media (min-width: 992px) {
  .testimonios-grid {
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  }
}

@media (min-width: 1200px) {
  .hero {
    padding-block-end: clamp(120px, 15vh, 160px);
  }
}

/* Focus visible mejorado para accesibilidad */
*:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Reduce motion */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Print styles */
@media print {
  .hero,
  footer,
  #testimonios {
    display: none;
  }

  #servicios {
    break-inside: avoid;
  }
}

/* Container queries para componentes */
@container (min-width: 400px) {
  .servicio-card {
    padding: var(--space-xl);
  }
}