/* ==========================================================================
   ECM IT-Consulting - Main Base & Layout Styles
   ========================================================================== */

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-white);
  overflow-x: hidden;
}

/* Accessibility: Skip to Content */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  padding: var(--space-3) var(--space-6);
  font-weight: 600;
  border-radius: var(--radius-md);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-4);
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* Accessible Focus States */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2rem, 4vw + 1rem, 3.25rem);
  line-height: 1.15;
  margin-bottom: var(--space-6);
}

h2 {
  font-size: clamp(1.75rem, 3vw + 0.5rem, 2.375rem);
  line-height: 1.2;
  margin-bottom: var(--space-4);
}

h3 {
  font-size: clamp(1.25rem, 2vw + 0.25rem, 1.5rem);
  line-height: 1.3;
  margin-bottom: var(--space-3);
}

h4 {
  font-size: var(--text-lg);
  line-height: 1.4;
  margin-bottom: var(--space-2);
}

p {
  color: var(--color-text-secondary);
  font-size: var(--text-base);
  line-height: 1.65;
  margin-bottom: var(--space-4);
  max-width: 72ch;
}

p.lead {
  font-size: var(--text-xl);
  line-height: 1.55;
  color: var(--color-text-secondary);
  font-weight: 400;
}

strong {
  font-weight: 600;
  color: var(--color-primary);
}

/* Container & Sections */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

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

.section {
  padding-top: var(--space-20);
  padding-bottom: var(--space-20);
  position: relative;
}

.section-light {
  background-color: var(--color-bg-light);
}

.section-white {
  background-color: var(--color-bg-white);
}

.section-dark {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--color-text-inverse);
}

.section-dark p {
  color: var(--color-text-inverse-muted);
}

/* Section Header */
.section-header {
  margin-bottom: var(--space-12);
  text-align: left;
}

.section-header.center {
  text-align: center;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
}

.section-eyebrow {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-secondary);
  margin-bottom: var(--space-2);
}

.section-dark .section-eyebrow {
  color: var(--color-accent);
}

/* Grid Layouts */
.grid {
  display: grid;
  gap: var(--space-8);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.grid-1-2 {
  grid-template-columns: 1fr 2fr;
}

.grid-2-1 {
  grid-template-columns: 2fr 1fr;
}

/* Flex Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Screen Reader Only Utility */
.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;
}