/* ==========================================================================
   STYLE.CSS - Global Variables, Reset, Typography, and Base Utilities
   ========================================================================== */

:root {
  /* Color Palette */
  --color-primary: #123B5D;
  --color-secondary: #1D6B8A;
  --color-accent: #DCEEF4;
  --color-bg: #F8FAFC;
  --color-text: #243746;
  --color-muted: #64748B;
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --text-xs: 0.75rem;     /* 12px */
  --text-sm: 0.875rem;    /* 14px */
  --text-base: 1rem;      /* 16px */
  --text-lg: 1.125rem;    /* 18px */
  --text-xl: 1.25rem;     /* 20px */
  --text-2xl: 1.5rem;     /* 24px */
  --text-3xl: 2rem;       /* 32px */
  --text-4xl: 2.5rem;     /* 40px */

  /* Spacing */
  --space-1: 0.25rem;     /* 4px */
  --space-2: 0.5rem;      /* 8px */
  --space-3: 0.75rem;     /* 12px */
  --space-4: 1rem;        /* 16px */
  --space-5: 1.25rem;     /* 20px */
  --space-6: 1.5rem;      /* 24px */
  --space-8: 2rem;        /* 32px */
  --space-10: 2.5rem;     /* 40px */
  --space-12: 3rem;       /* 48px */
  --space-16: 4rem;       /* 64px */
  --space-20: 5rem;       /* 80px */
  --space-24: 6rem;       /* 96px */

  /* Layout & Borders */
  --container-max: 1180px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --shadow-subtle: 0 1px 3px rgba(18, 59, 93, 0.05), 0 1px 2px rgba(18, 59, 93, 0.03);
  --shadow-card: 0 4px 12px rgba(18, 59, 93, 0.05);
  --transition-base: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 84px;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

ul,
ol {
  list-style: none;
}

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

/* Accessibility Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: var(--space-4);
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  font-weight: 600;
  z-index: 1000;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.section {
  padding: var(--space-20) 0;
}

/* Section Header Typography */
.section-header {
  max-width: 720px;
  margin-bottom: var(--space-12);
}

.section-label,
.section-badge {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-secondary);
  margin-bottom: var(--space-3);
}

.section-badge {
  background-color: var(--color-accent);
  color: var(--color-primary);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
}

.section-title {
  font-size: var(--text-3xl);
  font-weight: 700;
  line-height: 1.25;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}

.section-description {
  font-size: var(--text-lg);
  color: var(--color-muted);
  line-height: 1.65;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  line-height: 1.4;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.btn-sm {
  padding: 0.55rem 1.125rem;
  font-size: var(--text-sm);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: var(--text-base);
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--color-secondary);
}

.btn-outline {
  background-color: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-outline:hover,
.btn-outline:focus-visible {
  background-color: var(--color-accent);
  border-color: var(--color-secondary);
}