/* Performance-optimized reset - DFS Construction */
*, *::before, *::after { 
  box-sizing: border-box; 
}

html { 
  -webkit-text-size-adjust: 100%; 
  scroll-behavior: smooth; 
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { 
  margin: 0; 
  font-family: 'Inter', ui-sans-serif, system-ui, Segoe UI, Roboto, Helvetica, Arial, sans-serif; 
  line-height: 1.6; 
  color: var(--dfs-black); 
  background: #ffffff;
  min-height: 100vh;
  font-display: swap;
}

main { 
  padding-top: 65px; 
  border-top: 4px solid var(--dfs-blue);
}

img, svg { 
  display: block; 
  max-width: 100%; 
  height: auto;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
}

a { 
  color: inherit; 
  text-decoration: none; 
}

ul { 
  margin: 0; 
  padding-left: 1.25rem; 
}

h1, h2, h3, h4, h5, h6 { 
  line-height: 1.1; 
  margin: 0 0 0.5rem; 
  color: var(--dfs-black); 
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: -0.5px;
}

p { 
  margin: 0 0 1rem; 
  color: var(--dfs-charcoal);
}

/* DFS Construction Theme Variables */
:root {
  /* Primary Colors from Logo */
  --dfs-blue: #1E5CAF;
  --dfs-blue-dark: #164888;
  --dfs-blue-light: #2B6BC4;
  --dfs-blue-accent: #3A7AD3;
  
  /* Neutral Colors */
  --dfs-black: #1a1a1a;
  --dfs-charcoal: #2d2d2d;
  --dfs-gray-dark: #4a4a4a;
  --dfs-gray: #6c6c6c;
  --dfs-gray-light: #9a9a9a;
  --dfs-gray-lighter: #e0e0e0;
  --dfs-white: #ffffff;
  --dfs-off-white: #f8f9fa;
  
  /* Text Colors */
  --text-primary: var(--dfs-black);
  --text-secondary: var(--dfs-gray);
  --text-muted: var(--dfs-gray-light);
  
  /* Background Colors */
  --background-white: #ffffff;
  --background-light: #f5f7fa;
  --background-dark: var(--dfs-black);
  
  /* Borders */
  --border-light: var(--dfs-gray-lighter);
  --border-blue: var(--dfs-blue);
  --border-black: var(--dfs-black);
  
  /* Shadows - Industrial Style */
  --shadow-sm: 4px 4px 0 rgba(30, 92, 175, 0.15);
  --shadow-md: 6px 6px 0 rgba(30, 92, 175, 0.2);
  --shadow-lg: 10px 10px 0 var(--dfs-blue);
  --shadow-xl: 12px 12px 0 var(--dfs-black);
  
  /* No rounded corners for industrial look */
  --radius-sm: 0;
  --radius-md: 0;
  --radius-lg: 0;
  --radius-xl: 0;
}

/* Layout - Construction Grid */
.container { 
  width: min(1200px, 92%); 
  margin-inline: auto; 
  padding-inline: clamp(1rem, 3vw, 2rem);
  position: relative;
}

.container::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--dfs-blue);
  opacity: 0.2;
}

/* Buttons - Industrial Construction Style */
.button { 
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem; 
  border: 3px solid; 
  border-radius: 0; 
  font-weight: 800;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  min-height: 48px;
  white-space: nowrap;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.button.primary { 
  background: var(--dfs-blue); 
  color: white;
  border-color: var(--dfs-blue);
  box-shadow: 5px 5px 0 var(--dfs-black);
}

.button.primary:hover { 
  background: var(--dfs-blue-dark);
  transform: translate(-3px, -3px);
  box-shadow: 8px 8px 0 var(--dfs-black);
}

.button.outline { 
  background: transparent; 
  color: var(--dfs-blue); 
  border-color: var(--dfs-blue);
}

.button.outline:hover { 
  background: var(--dfs-blue); 
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 5px 0 var(--dfs-black);
}

.button.ghost { 
  background: rgba(255,255,255,0.05); 
  color: white; 
  border-color: white;
  backdrop-filter: none;
}

.button.ghost:hover { 
  background: white; 
  color: var(--dfs-blue);
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--dfs-blue);
}

/* Sections - Construction Layout */
.section { 
  padding: clamp(3rem, 6vw, 5rem) 0; 
  position: relative;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--dfs-blue) 20%, var(--dfs-blue) 80%, transparent);
}

.section-title { 
  font-size: clamp(2rem, 4vw, 3rem); 
  font-weight: 800; 
  text-align: center; 
  margin-bottom: 1rem;
  color: var(--dfs-black);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  position: relative;
  padding-bottom: 1rem;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: var(--dfs-blue);
}

.section-subtitle { 
  font-size: clamp(1rem, 2vw, 1.25rem); 
  text-align: center; 
  color: var(--text-secondary); 
  max-width: 65ch; 
  margin: 0 auto 2.5rem;
  font-weight: 500;
  line-height: 1.7;
}

/* Cards - Industrial Construction Design */
.card { 
  background: var(--background-white); 
  border: 3px solid var(--dfs-black); 
  border-radius: 0; 
  padding: 2rem; 
  box-shadow: 6px 6px 0 var(--dfs-blue);
  transition: all 0.3s ease;
  position: relative;
  clip-path: polygon(0 0, calc(100% - 15px) 0, 100% 15px, 100% 100%, 15px 100%, 0 calc(100% - 15px));
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--dfs-blue);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.card:hover { 
  box-shadow: 10px 10px 0 var(--dfs-blue);
  transform: translate(-3px, -3px);
  border-color: var(--dfs-blue);
}

.card:hover::before {
  transform: scaleX(1);
}

/* Grid Systems - Construction Grid */
.grid { 
  display: grid; 
  gap: 2rem; 
}

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

.grid-3 { 
  grid-template-columns: 1fr; 
}

.grid-4 { 
  grid-template-columns: 1fr; 
}

@media (min-width: 768px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
}

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

/* Utilities - DFS Construction */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.bg-dark { 
  background: linear-gradient(135deg, var(--dfs-black) 0%, var(--dfs-charcoal) 100%); 
  color: white; 
}

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

.border-top-blue {
  border-top: 4px solid var(--dfs-blue);
}

.border-bottom-blue {
  border-bottom: 4px solid var(--dfs-blue);
}

/* Typography Utilities */
.text-uppercase {
  text-transform: uppercase;
}

.text-bold {
  font-weight: 800;
}

.letter-spacing {
  letter-spacing: 1.5px;
}

/* Responsive - Mobile Construction */
@media (max-width: 768px) {
  .container { 
    width: 95%; 
    padding-inline: 1rem;
  }
  
  main { 
    padding-top: 60px; 
  }
  
  .button { 
    padding: 0.875rem 1.5rem;
    font-size: 0.85rem;
    letter-spacing: 1px;
    box-shadow: 4px 4px 0 var(--dfs-black);
  }
  
  .button:hover {
    transform: translate(-2px, -2px);
    box-shadow: 6px 6px 0 var(--dfs-black);
  }
  
  .card {
    box-shadow: 5px 5px 0 var(--dfs-blue);
    padding: 1.5rem;
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
  }
  
  .section-title {
    font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  }
}

@media (max-width: 480px) {
  .button {
    width: 100%;
    clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  }
  
  .card {
    border-width: 2px;
    box-shadow: 4px 4px 0 var(--dfs-blue);
  }
}

/* Accessibility - Construction Focus */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* Focus states - DFS Construction */
.button:focus-visible,
.card:focus-visible {
  outline: 3px solid var(--dfs-blue);
  outline-offset: 3px;
}

a:focus-visible {
  outline: 2px solid var(--dfs-blue);
  outline-offset: 2px;
}