/* ========================================
   VISUALIZE WEBSITE - MAIN STYLESHEET
   ======================================== */

/* === CSS CUSTOM PROPERTIES (VARIABLES) === */
:root {
  /* Brand Colors */
  --brand-red: #e53e3b;
  --brand-red-dark: #b71c1c;
  --brand-red-light: #ff6b6b;
  
  /* Background Colors */
  --bg-light: #fafbfc;
  --bg-white: #ffffff;
  --bg-dark: #1b1b1c;
  --bg-dark-start: #1a1a1a;
  --bg-dark-end: #0f0f0f;
  --bg-card: #f9fafb;
  --bg-neutral: #f3f4f6;
  
  /* Text Colors */
  --text-dark: #0f172a;
  --text-secondary: #333333;
  --text-muted: #6b7280;
  --text-light: #ffffff;
  --text-muted-light: #bbb;
  --text-muted-dark: #888;
  
  /* Border Colors */
  --border-light: #e5e7eb;
  --border-dark: #222;
  --border-accent: #333;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 18px;
  --radius-full: 999px;
  
  /* Shadows */
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.04);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.06);
  --shadow-lg: 0 12px 28px rgba(0,0,0,0.12);
  --shadow-xl: 0 20px 40px rgba(0,0,0,0.15);
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  --transition-slow: 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
  
  /* Typography */
  --font-family: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  
  /* Layout */
  --max-width: 1120px;
  --container-padding: 20px;
}

/* === RESET & BASE STYLES === */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family);
  background: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  font-size: var(--font-size-base);
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0.8em 0 0.4em;
  color: var(--brand-red);
  line-height: 1.2;
}

h1 { font-size: clamp(2rem, 6vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 4.5vw, 2.25rem); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-base); }
h6 { font-size: var(--font-size-sm); }

p {
  margin-bottom: 1.2em;
  color: var(--text-muted);
}

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

a:hover, a:focus {
  color: var(--brand-red-dark);
  text-decoration: underline;
  outline: none;
}

/* === LAYOUT UTILITIES === */
.wrap, .container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section-padding {
  padding: var(--spacing-2xl) 0;
}

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

/* === BUTTON COMPONENTS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 18px;
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--font-size-base);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-base);
  appearance: none;
}

.btn:hover, .btn:focus {
  transform: translateY(-2px);
  text-decoration: none;
  outline: none;
}

.btn.primary {
  background: var(--brand-red);
  color: var(--text-light);
  box-shadow: var(--shadow-md);
}

.btn.primary:hover, .btn.primary:focus {
  background: var(--brand-red-dark);
  box-shadow: var(--shadow-lg);
}

.btn.secondary {
  background: var(--bg-neutral);
  color: var(--text-dark);
  box-shadow: var(--shadow-sm);
}

.btn.secondary:hover, .btn.secondary:focus {
  background: var(--border-light);
  box-shadow: var(--shadow-md);
}

.btn.ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border-light);
}

.btn.ghost:hover, .btn.ghost:focus {
  background: var(--bg-white);
  color: var(--text-dark);
  border-color: var(--brand-red);
}

/* === CARD COMPONENTS === */
.card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card h3 {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
}

.card p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

/* === GRID SYSTEMS === */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}

/* === ANIMATION UTILITIES === */
.fade-in {
  opacity: 0;
  animation: fadeInAnimation 1s forwards;
}

@keyframes fadeInAnimation {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Scroll reveal animations */
section.hidden, .hidden {
  opacity: 0;
  transform: translateY(60px) scale(0.98);
  transition: opacity 0.8s var(--transition-base),
              transform 0.8s var(--transition-base);
  will-change: opacity, transform;
}

section.visible, .visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

/* Stagger animation utility */
.stagger-child > * {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.stagger-child.visible > * {
  opacity: 1;
  transform: translateY(0);
}

.stagger-child.visible > *:nth-child(1) { transition-delay: 0.1s; }
.stagger-child.visible > *:nth-child(2) { transition-delay: 0.2s; }
.stagger-child.visible > *:nth-child(3) { transition-delay: 0.3s; }
.stagger-child.visible > *:nth-child(4) { transition-delay: 0.4s; }
.stagger-child.visible > *:nth-child(5) { transition-delay: 0.5s; }
.stagger-child.visible > *:nth-child(6) { transition-delay: 0.6s; }

/* === RESPONSIVE BREAKPOINTS === */
@media (max-width: 1200px) {
  .container, .wrap {
    padding: 0 var(--spacing-md);
  }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .section-padding {
    padding: var(--spacing-xl) 0;
  }
  
  .container, .wrap {
    padding: 0 var(--spacing-sm);
  }
}

@media (max-width: 480px) {
  .btn {
    padding: 10px 16px;
    font-size: var(--font-size-sm);
  }
  
  .card {
    padding: var(--spacing-md);
  }
}

/* === ACCESSIBILITY === */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  
  .fade-in {
    animation: none;
    opacity: 1;
  }
  
  section.hidden,
  .hidden {
    opacity: 1;
    transform: none;
  }
}

/* Focus visibility for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--brand-red);
  outline-offset: 2px;
}

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