/* ============================================
   MAIN — Staffing Academy
   Design tokens, reset, layout grid, containers
   ============================================ */

/* ---- CSS Reset ---- */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
}

body {
  min-height: 100vh;
  background: var(--bg-body);
  overflow-x: hidden;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

input, button, textarea, select {
  font: inherit;
  color: inherit;
}

ul, ol { list-style: none; }
table { border-collapse: collapse; }

/* ---- Design Tokens ---- */

:root {
  /* Primary — Deep Navy to Electric Blue */
  --primary: #1B2A4A;
  --primary-light: #2D4A7A;
  --primary-bright: #3B82F6;
  --primary-subtle: rgba(59, 130, 246, 0.08);

  /* Accent — Warm Amber */
  --accent: #F59E0B;
  --accent-light: #FCD34D;
  --accent-subtle: rgba(245, 158, 11, 0.10);

  /* Semantic */
  --success: #10B981;
  --success-subtle: rgba(16, 185, 129, 0.10);
  --warning: #F59E0B;
  --warning-subtle: rgba(245, 158, 11, 0.10);
  --danger: #EF4444;
  --danger-subtle: rgba(239, 68, 68, 0.10);
  --info: #06B6D4;
  --info-subtle: rgba(6, 182, 212, 0.10);

  /* Neutrals */
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-tertiary: #94A3B8;
  --text-inverse: #F8FAFC;

  --bg-body: #F8FAFC;
  --bg-surface: #FFFFFF;
  --bg-elevated: #FFFFFF;
  --bg-inset: #F1F5F9;
  --bg-dark: #0F172A;
  --bg-dark-secondary: #1E293B;

  --border-default: #E2E8F0;
  --border-subtle: #F1F5F9;
  --border-strong: #CBD5E1;

  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-blur: blur(16px);

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #0F172A 0%, #1E3A5F 40%, #1B2A4A 100%);
  --gradient-accent: linear-gradient(135deg, #3B82F6 0%, #06B6D4 100%);
  --gradient-warm: linear-gradient(135deg, #F59E0B 0%, #EF4444 100%);
  --gradient-surface: linear-gradient(180deg, var(--bg-body) 0%, var(--bg-inset) 100%);
  --gradient-card-hover: linear-gradient(135deg, rgba(59, 130, 246, 0.04), rgba(6, 182, 212, 0.04));

  /* Chart palette */
  --chart-1: #3B82F6;
  --chart-2: #F59E0B;
  --chart-3: #10B981;
  --chart-4: #EF4444;
  --chart-5: #8B5CF6;
  --chart-6: #06B6D4;
  --chart-7: #EC4899;
  --chart-8: #14B8A6;

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

  /* Borders */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 28px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.10);
  --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.14);
  --shadow-glow: 0 0 24px rgba(59, 130, 246, 0.15);
  --shadow-accent-glow: 0 0 24px rgba(245, 158, 11, 0.2);

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --duration-fast: 150ms;
  --duration-normal: 250ms;
  --duration-slow: 400ms;

  /* Z-index scale */
  --z-base: 1;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-overlay: 300;
  --z-modal: 400;
  --z-toast: 500;
}

/* ---- Layout ---- */

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* ---- Section spacing ---- */

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

.section-lg {
  padding: var(--space-32) 0;
}

.section-sm {
  padding: var(--space-12) 0;
}

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

.section-dark .text-secondary,
.section-dark .lead {
  color: var(--text-tertiary);
}

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

.section-header {
  margin-bottom: var(--space-12);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

/* ---- Grid system ---- */

.grid {
  display: grid;
  gap: var(--space-6);
}

.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-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(min(300px, 100%), 1fr));
}

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .grid-4,
  .grid-3,
  .grid-2 {
    grid-template-columns: 1fr;
  }
}

/* ---- Flex utilities ---- */

.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-center { justify-content: 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); }

/* ---- Spacing utilities ---- */

.mt-4 { margin-top: var(--space-4); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }
.mt-12 { margin-top: var(--space-12); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }
.mb-12 { margin-bottom: var(--space-12); }

/* ---- Divider ---- */

.divider {
  width: 100%;
  height: 1px;
  background: var(--border-default);
  margin: var(--space-12) 0;
}

.divider-gradient {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary-bright), transparent);
  margin: var(--space-12) 0;
}

/* ---- Visually hidden (a11y) ---- */

.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;
}

/* ---- Hero sections ---- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--gradient-hero);
  color: var(--text-inverse);
  overflow: hidden;
}

.hero-inner {
  position: relative;
  z-index: var(--z-base);
  width: 100%;
}

.hero-bg-mesh {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg-mesh::before,
.hero-bg-mesh::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.3;
}

.hero-bg-mesh::before {
  width: 600px;
  height: 600px;
  background: var(--primary-bright);
  top: -200px;
  right: -100px;
  animation: float-orb 20s ease-in-out infinite;
}

.hero-bg-mesh::after {
  width: 500px;
  height: 500px;
  background: var(--info);
  bottom: -150px;
  left: -100px;
  animation: float-orb 25s ease-in-out infinite reverse;
}

/* ---- Page header (non-hero) ---- */

.page-header {
  background: var(--gradient-hero);
  color: var(--text-inverse);
  padding: var(--space-32) 0 var(--space-16);
  position: relative;
  overflow: hidden;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.04'/%3E%3C/svg%3E");
  pointer-events: none;
}

.page-header h1 {
  margin-bottom: var(--space-4);
}

.page-header .lead {
  color: rgba(255, 255, 255, 0.7);
}

/* ---- Footer ---- */

.site-footer {
  background: var(--bg-dark);
  color: var(--text-inverse);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand p {
  color: var(--text-tertiary);
  max-width: 280px;
  margin-top: var(--space-3);
}

.footer-links h4 {
  font-size: var(--text-sm);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--text-tertiary);
  margin-bottom: var(--space-4);
  font-weight: var(--weight-semibold);
}

.footer-links a {
  display: block;
  color: rgba(255, 255, 255, 0.6);
  padding: var(--space-1) 0;
  transition: color var(--duration-fast) ease;
}

.footer-links a:hover {
  color: var(--accent);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--text-tertiary);
  font-size: var(--text-sm);
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-3);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
}