/**
 * FetchValue Static Website - Main Stylesheet
 * Brand-aligned CSS foundation for all website pages
 * Version: 1.0
 * Last Updated: December 2025
 */

/* ========================================================================
   Section 1: Google Fonts Import
   ======================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700&family=Roboto+Mono:wght@400&display=swap');

/* ========================================================================
   Section 2: CSS Custom Properties (Design Tokens)
   ======================================================================== */

:root {
  /* Brand Colors - From mobile/constants/Colors.ts */
  --color-charcoal: #111827;
  --color-snow: #FFFFFF;
  --color-cobalt: #1769FF;
  --color-cobalt-tint: #EEF4FF;
  --color-lemon: #FDE047;
  --color-cool-gray: #E5E7EB;
  --color-emerald: #10B981;
  --color-orange: #F59E0B;

  /* Spacing Scale - From mobile/constants/Layout.ts */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-base: 16px;
  --space-lg: 20px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-xxxl: 40px;

  /* Typography */
  --font-primary: 'Nunito', sans-serif;
  --font-mono: 'Roboto Mono', monospace;

  /* Border Radius - From docs/design/COMPONENTS.md */
  --radius-button: 8px;
  --radius-card: 16px;  /* Updated to match COMPONENTS.md spec */
  --radius-pill: 9999px;

  /* Hover State Colors */
  --color-cobalt-dark: #1557d6;
  --color-lemon-dark: #fcd34d;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 200ms ease-in-out;
  --transition-normal: 300ms ease-in-out;
}

/* ========================================================================
   Section 3: Minimal CSS Reset
   ======================================================================== */

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

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

body {
  font-family: var(--font-primary);
  font-size: 16px;
  line-height: 1.5;
  color: var(--color-charcoal);
  background-color: var(--color-snow);
  min-height: 100vh;
}

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

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

p,
h1,
h2,
h3,
h4,
h5,
h6 {
  overflow-wrap: break-word;
}

/* ========================================================================
   Section 4: Typography Classes
   From docs/design/TYPOGRAPHY.md
   ======================================================================== */

/* Headlines */
.h1 {
  font-family: var(--font-primary);
  font-size: 32px;
  font-weight: 700;
  line-height: 40px;
  color: var(--color-charcoal);
}

.h2 {
  font-family: var(--font-primary);
  font-size: 24px;
  font-weight: 600;
  line-height: 32px;
  color: var(--color-charcoal);
}

.h3 {
  font-family: var(--font-primary);
  font-size: 20px;
  font-weight: 600;
  line-height: 28px;
  color: var(--color-charcoal);
}

.h4 {
  font-family: var(--font-primary);
  font-size: 18px;
  font-weight: 600;
  line-height: 24px;
  color: var(--color-charcoal);
}

/* Body Text */
.body-large {
  font-family: var(--font-primary);
  font-size: 18px;
  font-weight: 400;
  line-height: 28px;
  color: var(--color-charcoal);
}

.body {
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 400;
  line-height: 24px;
  color: var(--color-charcoal);
}

.body-small {
  font-family: var(--font-primary);
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  color: var(--color-charcoal);
}

.caption {
  font-family: var(--font-primary);
  font-size: 12px;
  font-weight: 400;
  line-height: 16px;
  color: var(--color-charcoal);
}

/* Price Display */
.price {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  line-height: 24px;
  color: var(--color-charcoal);
}

/* ========================================================================
   Section 5: Button Components
   From docs/design/COMPONENTS.md
   ======================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 20px;
  border: none;
  border-radius: var(--radius-button);
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 600;
  line-height: 24px;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 48px;
}

.btn:focus-visible {
  outline: 2px solid var(--color-cobalt);
  outline-offset: 2px;
}

/* Primary Button */
.btn-primary {
  background-color: var(--color-cobalt);
  color: var(--color-snow);
}

.btn-primary:hover {
  background-color: var(--color-cobalt-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-primary:disabled {
  background-color: var(--color-cool-gray);
  color: var(--color-charcoal);
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}

/* Secondary Button */
.btn-secondary {
  background-color: var(--color-snow);
  color: var(--color-charcoal);
  border: 1px solid var(--color-cool-gray);
}

.btn-secondary:hover {
  background-color: var(--color-cobalt-tint);
  border-color: var(--color-cobalt);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-secondary:disabled {
  background-color: var(--color-cool-gray);
  color: var(--color-charcoal);
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}

/* Warning Button */
.btn-warning {
  background-color: var(--color-lemon);
  color: var(--color-charcoal);
  border: none;
}

.btn-warning:hover {
  background-color: var(--color-lemon-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-warning:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-warning:disabled {
  background-color: var(--color-cool-gray);
  color: var(--color-charcoal);
  cursor: not-allowed;
  opacity: 0.5;
  transform: none;
  box-shadow: none;
}

/* Button Sizes */
.btn-small {
  min-height: 36px;
  padding: 8px 16px;
  font-size: 14px;
}

.btn-large {
  min-height: 56px;
  padding: 16px 24px;
  font-size: 18px;
}

/* Full Width Button */
.btn-full {
  width: 100%;
}

/* ========================================================================
   Section 6: Card Components
   ======================================================================== */

.card {
  background-color: var(--color-snow);
  border-radius: var(--radius-card);
  padding: var(--space-base);
}

.card-elevated {
  box-shadow: var(--shadow-md);
}

.card-outlined {
  border: 1px solid var(--color-cool-gray);
}

/* Card Padding Variants */
.card-padding-none {
  padding: 0;
}

.card-padding-small {
  padding: var(--space-md);
}

.card-padding-medium {
  padding: var(--space-base);
}

.card-padding-large {
  padding: var(--space-xl);
}

/* ========================================================================
   Section 7: Layout Components
   ======================================================================== */

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

/* Skip Navigation Link - Accessibility */
.skip-to-main {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--color-cobalt);
  color: var(--color-snow);
  padding: var(--space-sm);
  text-decoration: none;
  z-index: 1001;
  border-radius: var(--radius-button);
  font-weight: 600;
}

.skip-to-main:focus {
  top: var(--space-sm);
  left: var(--space-sm);
}

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: var(--color-snow);
  border-bottom: 1px solid var(--color-cool-gray);
  padding: var(--space-base) 0;
  box-shadow: var(--shadow-sm);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header .logo {
  display: flex;
  align-items: center;
}

.header .logo img {
  height: 40px;
  width: auto;
}

/* Navigation */
.nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav a {
  font-family: var(--font-primary);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-charcoal);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.nav a:hover {
  color: var(--color-cobalt);
}

.nav a:focus-visible {
  outline: 2px solid var(--color-cobalt);
  outline-offset: 4px;
  border-radius: 4px;
}

/* Footer */
.footer {
  background-color: var(--color-charcoal);
  color: var(--color-snow);
  padding: var(--space-xxxl) 0 var(--space-xl);
  margin-top: var(--space-xxxl);
}

.footer .container {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xxxl);
  justify-content: space-between;
}

.footer-section {
  flex: 1;
  min-width: 200px;
}

.footer-section h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-base);
  color: var(--color-snow);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-links a {
  font-size: 14px;
  color: var(--color-cool-gray);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.footer-links a:focus-visible {
  outline: 2px solid var(--color-cobalt);
  outline-offset: 4px;
  border-radius: 4px;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-base);
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(229, 231, 235, 0.2);
}

.footer-copyright {
  font-size: 14px;
  color: var(--color-cool-gray);
}

/* ========================================================================
   Section 8: Responsive Breakpoints
   Mobile-first approach
   ======================================================================== */

/* Tablet (768px and up) */
@media (min-width: 768px) {
  .h1 {
    font-size: 40px;
    line-height: 48px;
  }

  .h2 {
    font-size: 32px;
    line-height: 40px;
  }

  .container {
    padding: 0 var(--space-xl);
  }

  .header .logo img {
    height: 48px;
  }

  .nav {
    gap: var(--space-xxl);
  }

  .footer-content {
    flex-wrap: nowrap;
  }
}

/* Desktop (1024px and up) */
@media (min-width: 1024px) {
  .h1 {
    font-size: 48px;
    line-height: 56px;
  }

  .h2 {
    font-size: 36px;
    line-height: 44px;
  }

  .container {
    padding: 0 var(--space-xxl);
  }

  .nav a {
    font-size: 18px;
  }
}

/* Large (1280px and up) */
@media (min-width: 1280px) {
  .container {
    padding: 0 var(--space-xxxl);
  }
}

/* ========================================================================
   Utility Classes
   ======================================================================== */

/* Spacing Utilities */
.mt-xs { margin-top: var(--space-xs); }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-base { margin-top: var(--space-base); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-xxl { margin-top: var(--space-xxl); }
.mt-xxxl { margin-top: var(--space-xxxl); }

.mb-xs { margin-bottom: var(--space-xs); }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-base { margin-bottom: var(--space-base); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }
.mb-xxl { margin-bottom: var(--space-xxl); }
.mb-xxxl { margin-bottom: var(--space-xxxl); }

/* Text Alignment */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

/* Color Utilities */
.text-charcoal { color: var(--color-charcoal); }
.text-cobalt { color: var(--color-cobalt); }
.text-emerald { color: var(--color-emerald); }
.text-orange { color: var(--color-orange); }
.text-cool-gray { color: var(--color-cool-gray); }

.bg-snow { background-color: var(--color-snow); }
.bg-charcoal { background-color: var(--color-charcoal); }
.bg-cobalt-tint { background-color: var(--color-cobalt-tint); }
.bg-lemon { background-color: var(--color-lemon); }

/* Display Utilities */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--space-sm); }
.gap-base { gap: var(--space-base); }
.gap-xl { gap: var(--space-xl); }

/* Footer Utilities */
.footer-logo {
  filter: brightness(0) invert(1);
}

.footer-tagline {
  color: var(--color-cool-gray);
  margin-top: var(--space-base);
}