/* ==========================================================================
   BASE & RESET — Mobile-First Luxury Tech Foundation
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
  background-color: var(--bg-carbon);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color-scheme: dark;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  min-height: 100dvh;
  background-color: var(--bg-carbon);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -10%, rgba(204, 255, 0, 0.08), transparent 65%),
    radial-gradient(ellipse 55% 40% at 88% 18%, rgba(0, 240, 255, 0.06), transparent 60%);
  overflow-x: clip;
  position: relative;
}

/* Sutil retícula arquitectónica de fondo */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -1;
  background-image:
    linear-gradient(to right, rgba(255, 255, 255, 0.018) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(circle at 50% 25%, black 25%, transparent 85%);
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  background: none;
  border: none;
}

ul,
ol {
  list-style: none;
}

/* Accesibilidad de foco */
:focus-visible {
  outline: 2px solid var(--accent-lime);
  outline-offset: 3px;
}

/* Tipografía Global */
h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: 1.12;
  color: var(--text-primary);
}

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

@media (min-width: 768px) {
  .container {
    padding-inline: 2rem;
  }
}

.section {
  padding-block: 4.5rem;
  position: relative;
}

@media (min-width: 960px) {
  .section {
    padding-block: 6.5rem;
  }
}

.section--alt {
  background: linear-gradient(180deg, rgba(18, 19, 22, 0.72) 0%, rgba(10, 10, 12, 0.92) 100%);
  border-block: 1px solid var(--border-subtle);
}

.section-header {
  max-width: 780px;
  margin-inline: auto;
  text-align: center;
  margin-bottom: 3rem;
}

@media (min-width: 960px) {
  .section-header {
    margin-bottom: 4rem;
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.38rem 0.85rem;
  border-radius: var(--radius-pill);
  background: var(--surface-glass);
  border: 1px solid var(--border-subtle);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent-lime);
  margin-bottom: 1.15rem;
}

.eyebrow--cyan {
  color: var(--accent-cyan);
  border-color: rgba(0, 240, 255, 0.2);
  background: rgba(0, 240, 255, 0.06);
}

.section-title {
  font-size: clamp(1.85rem, 4vw, 2.95rem);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--text-secondary);
  line-height: 1.65;
}

.text-accent {
  color: var(--accent-lime);
}

.text-cyan {
  color: var(--accent-cyan);
}

.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;
}

/* Botones del Sistema de Diseño */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.45rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  transition:
    transform var(--transition-fast),
    background-color var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    color var(--transition-fast);
  white-space: nowrap;
}

.btn:active {
  transform: translateY(1px) scale(0.99);
}

.btn--primary {
  background: var(--accent-lime);
  color: var(--text-on-accent);
  box-shadow: var(--shadow-lime);
}

.btn--primary:hover {
  background: var(--accent-lime-hover);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -6px rgba(204, 255, 0, 0.45);
}

.btn--outline {
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-primary);
  border: 1px solid var(--border-highlight);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.32);
  transform: translateY(-1px);
}

.btn--ghost {
  background: var(--surface-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
}

.btn--ghost:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-highlight);
}

.btn--lg {
  padding: 1.05rem 1.75rem;
  font-size: 1.02rem;
  border-radius: var(--radius-md);
}

.btn--full {
  width: 100%;
}

/* Scrollbar personalizada */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--bg-carbon);
}

::-webkit-scrollbar-thumb {
  background: #27272A;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #3F3F46;
}