/**
 * SKYPURE — Base Styles & Typography (Regulated Architectural Direction)
 */

/* ==========================================================================
   CSS Reset & Box Sizing
   ========================================================================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg-primary);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-weight-normal);
  line-height: 1.65;
  letter-spacing: var(--tracking-normal);
  position: relative;
  min-height: 100vh;
}

/* ==========================================================================
   Architectural Scrollbar
   ========================================================================== */
::-webkit-scrollbar {
  width: 5px;
  height: 5px;
}

::-webkit-scrollbar-track {
  background: var(--color-black);
}

::-webkit-scrollbar-thumb {
  background: var(--color-steel);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-concrete);
}

/* ==========================================================================
   Typography Primitives
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: var(--font-weight-bold);
  line-height: 1.15;
  letter-spacing: var(--tracking-tight);
}

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

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  border: none;
  background: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* Regulated Architectural Metadata Labels */
.meta-tag,
.tech-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
}

/* ==========================================================================
   Containers & Section Wrappers
   ========================================================================== */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

.section {
  position: relative;
  padding-top: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-top: 1px solid var(--border-subtle);
}

.section-hero {
  padding-top: 0;
  padding-bottom: 0;
  border-top: none;
}

/* Architectural Section Headers */
.section-header {
  margin-bottom: var(--space-2xl);
  position: relative;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--tracking-widest);
  color: var(--color-concrete);
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
}

.section-eyebrow::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1px;
  background-color: var(--color-concrete);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: var(--font-weight-extrabold);
  letter-spacing: var(--tracking-tighter);
  color: var(--text-primary);
  text-transform: uppercase;
}

.section-desc {
  max-width: 680px;
  margin-top: var(--space-sm);
  font-size: var(--text-base);
  color: var(--text-muted);
  line-height: 1.65;
}

/* ==========================================================================
   Reduced Motion Accessibility
   ========================================================================== */
@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;
  }
}