/* Layout Primitives & Core Styles for JSR NetSol */

/* Reset & Base Styles */
*, *::before, *::after {
  box-sizing: border-box;
}

body, h1, h2, h3, h4, p, figure, blockquote, dl, dd {
  margin: 0;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: var(--fs-base);
  line-height: var(--lh-normal);
  color: var(--color-text-light-primary);
  background-color: var(--color-light-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--color-text-light-primary);
}

h1 { font-size: clamp(var(--fs-3xl), 8vw, var(--fs-6xl)); }
h2 { font-size: clamp(var(--fs-2xl), 5vw, var(--fs-4xl)); }
h3 { font-size: clamp(var(--fs-xl), 3vw, var(--fs-2xl)); }
h4 { font-size: var(--fs-lg); }

p {
  color: var(--color-text-light-secondary);
  line-height: var(--lh-relaxed);
}

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

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

/* Layout Primitives */

/* 1. Container - Constraints content width */
.container {
  width: 100%;
  max-width: var(--max-width-content);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* 2. Section - Standard vertical spacing block */
.section {
  padding-top: var(--space-16);
  padding-bottom: var(--space-16);
}
@media (min-width: 768px) {
  .section {
    padding-top: var(--space-24);
    padding-bottom: var(--space-24);
  }
}

/* Dark mode theme section modifier with rich static ambient glow */
.section-dark {
  background: radial-gradient(circle at 15% 25%, rgba(37, 99, 235, 0.15), transparent 50%),
              radial-gradient(circle at 85% 75%, rgba(234, 88, 12, 0.14), transparent 55%),
              linear-gradient(180deg, #0b0f19 0%, #0f172a 100%);
  color: var(--color-text-dark-primary);
  position: relative;
  border-top: 1px solid rgba(6, 182, 212, 0.25);
  border-bottom: 1px solid rgba(234, 88, 12, 0.25);
}

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

/* Muted light theme section modifier with rich vibrant warm & cyan contour blend */
.section-muted {
  background: linear-gradient(135deg, #f0f7ff 0%, #fff7ed 50%, #f0fdfa 100%);
  border-top: 1px solid rgba(234, 88, 12, 0.2);
  border-bottom: 1px solid rgba(37, 99, 235, 0.2);
  position: relative;
}

/* Dynamic Section Contour Line Separator - Static & Vibrant */
.section-contour {
  position: relative;
}

.section-contour::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #2563eb 0%, #ea580c 50%, #06b6d4 100%);
  box-shadow: 0 0 12px rgba(234, 88, 12, 0.3);
}

/* 3. Stack - Vertical flow primitive */
.stack {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
}
.stack > * + * {
  margin-top: var(--space-4);
}
.stack-sm > * + * { margin-top: var(--space-2); }
.stack-md > * + * { margin-top: var(--space-6); }
.stack-lg > * + * { margin-top: var(--space-12); }

/* 4. Cluster - Horizontal inline flex flow primitive */
.cluster {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-4);
}
.cluster-sm { gap: var(--space-2); }
.cluster-md { gap: var(--space-6); }
.cluster-lg { gap: var(--space-12); }
.cluster-between { justify-content: space-between; }
.cluster-center { justify-content: center; }

/* 5. Grid - Fluid multi-column layout primitive */
.grid {
  display: grid;
  gap: var(--space-6);
}
.grid-2 {
  grid-template-columns: 1fr;
}
.grid-3 {
  grid-template-columns: 1fr;
}
.grid-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 768px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-lg { gap: var(--space-12); }
}

@media (min-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Utility classes */
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary) !important; }
.text-secondary { color: var(--color-secondary) !important; }
.text-muted { color: var(--color-text-light-muted) !important; }
.section-dark .text-muted { color: var(--color-text-dark-muted) !important; }

.font-heading { font-family: var(--font-heading); }

.w-full { width: 100%; }

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-radius: 0;
  border: 0;
}

/* Subpage Header Layout */
.page-header {
  padding-top: 140px;
  padding-bottom: var(--space-12);
  background-color: var(--color-light-surface);
  border-bottom: 1px solid var(--border-light);
}

.page-title {
  font-size: clamp(var(--fs-3xl), 6vw, var(--fs-5xl));
  margin-bottom: var(--space-4);
  letter-spacing: -1px;
}

.lead-text {
  font-weight: 500;
  font-size: var(--fs-lg);
}

.divider {
  border: 0;
  border-top: 1px solid var(--border-light);
  margin: var(--space-4) 0;
}
.section-dark .divider {
  border-color: var(--border-dark);
}

.max-width-sm {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.max-width-md {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Margin and Spacing Helpers */
.mt-2 { margin-top: var(--space-2) !important; }
.mt-4 { margin-top: var(--space-4) !important; }
.mt-6 { margin-top: var(--space-6) !important; }
.mt-8 { margin-top: var(--space-8) !important; }

.mb-1 { margin-bottom: var(--space-1) !important; }
.mb-2 { margin-bottom: var(--space-2) !important; }
.mb-3 { margin-bottom: var(--space-3) !important; }
.mb-4 { margin-bottom: var(--space-4) !important; }
.mb-6 { margin-bottom: var(--space-6) !important; }