/* ========================================================
   RESETEO BASE, ACCESIBILIDAD Y TIPOGRAFÍA GLOBAL
   ======================================================== */

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--color-text-body);
  background-color: var(--color-bg-body);
  line-height: 1.7;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Enlaces */
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Títulos con Montserrat */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-text-heading);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.015em;
}

h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  font-weight: 800;
}

h2 {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  margin-bottom: 0.75rem;
}

h3 {
  font-size: clamp(1.25rem, 2vw, 1.5rem);
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 1rem;
}

p:last-child {
  margin-bottom: 0;
}

img, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* Contenedor fluido con padding de seguridad */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(1.25rem, 4vw, 2rem);
  padding-right: clamp(1.25rem, 4vw, 2rem);
}

/* Secciones base */
.section {
  padding-top: var(--section-padding-y);
  padding-bottom: var(--section-padding-y);
  position: relative;
}

@media (max-width: 768px) {
  .section {
    padding-top: var(--section-padding-mobile);
    padding-bottom: var(--section-padding-mobile);
  }
}

.section--surface {
  background-color: var(--color-bg-surface);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.section--tech {
  background-color: var(--color-tech-bg);
  color: #E2E8F0;
  overflow: hidden;
}

.section--tech h2,
.section--tech h3 {
  color: var(--color-text-inverse);
}

.section--tech .section-subtitle {
  color: #94A3B8;
}

/* Cabeceras de sección reutilizables */
.section-header {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.9rem;
  font-size: 0.8rem;
  font-weight: 700;
  font-family: var(--font-heading);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background-color: var(--color-primary-subtle);
  border: 1px solid rgba(12, 113, 195, 0.2);
  border-radius: var(--radius-full);
  margin-bottom: 1rem;
}

.section-tag--accent {
  color: var(--color-accent);
  background-color: var(--color-accent-subtle);
  border-color: rgba(243, 145, 33, 0.25);
}

.section-tag--tech {
  color: var(--color-primary-light);
  background-color: rgba(46, 163, 242, 0.12);
  border-color: rgba(46, 163, 242, 0.3);
}

.section-subtitle {
  font-size: clamp(1rem, 1.3vw, 1.15rem);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* Accesibilidad y Lectores de Pantalla */
.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;
}

/* Enfoque visible de alta accesibilidad */
:focus-visible {
  outline: 3px solid var(--color-primary-light);
  outline-offset: 3px;
}

/* Respeto a usuarios con sensibilidad al movimiento */
@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;
    scroll-behavior: auto !important;
  }
}