/* ========================================================================
   GEO SOLUTIONS — BASE STYLES
   Reset, typography defaults, page-level foundations.
   Loaded after tokens.css.
   ======================================================================== */

/* ===== MODERN RESET ===== */
*, *::before, *::after {
  box-sizing: border-box;
}

* {
  margin: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-body);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-base);

  /* Subtle 80px grid texture per design tokens v1.1 Section 11 */
  background-image:
    linear-gradient(to right, var(--color-border-subtle) 1px, transparent 1px),
    linear-gradient(to bottom, var(--color-border-subtle) 1px, transparent 1px);
  background-size: 80px 80px;
  background-position: -1px -1px;

  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-medium);
  line-height: var(--leading-tight);
  letter-spacing: var(--tracking-tight);
  margin: 0;
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-default);
}

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

button {
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  color: inherit;
}

input, textarea, select {
  font: inherit;
}

/* ===== ACCESSIBILITY ===== */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* Skip link for keyboard users */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  padding: var(--space-3) var(--space-6);
  background: var(--color-accent);
  color: var(--color-accent-text);
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
  z-index: 100;
  transition: top var(--duration-fast) var(--ease-default);
}

.skip-link:focus {
  top: 0;
}

/* ===== 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;
  }
}

/* ===== SELECTION ===== */
::selection {
  background: var(--color-accent);
  color: var(--color-accent-text);
}

/* ===== SCROLLBAR (subtle, dark mode) ===== */
::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-bg-elevated);
  border: 3px solid var(--color-bg-base);
  border-radius: var(--radius-full);
}

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

/* ===== CONTAINERS ===== */
.container {
  max-width: var(--container-default);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container--narrow {
  max-width: var(--container-narrow);
}

.container--wide {
  max-width: var(--container-wide);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--space-8);
  }
}

/* ===== SECTION ===== */
section {
  padding: var(--space-32) 0;
}

@media (max-width: 767px) {
  section {
    padding: var(--space-16) 0;
  }
}

/* ===== UTILITY: SECTION TAG (small mono uppercase label) ===== */
.section-tag {
  font-family: var(--font-mono);
  font-size: var(--text-mono-sm);
  letter-spacing: var(--tracking-wide);
  color: var(--color-accent);
  text-transform: uppercase;
  margin-bottom: var(--space-4);
  display: block;
}

/* ===== UTILITY: SECTION TITLE ===== */
.section-title {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  letter-spacing: var(--tracking-tight);
  line-height: var(--leading-tight);
  max-width: 22ch;
  margin-bottom: var(--space-6);
}

/* ===== UTILITY: SECTION LEAD (large body for section intros) ===== */
.section-lead {
  font-size: var(--text-body-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-secondary);
  max-width: 60ch;
}

/* ===== UTILITY: VISUALLY HIDDEN (for screen readers only) ===== */
.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;
}