/* ========================================
   CanWeGet.com - Main Stylesheet
   Modern SaaS group buying platform
   Mobile-first, responsive, accessible
======================================== */

/* CSS Custom Properties / Variables */
:root {
  /* Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-secondary: #059669;
  --color-secondary-dark: #047857;
  --color-bg: #ffffff;
  --color-bg-secondary: #f8fafc;
  --color-text: #1e293b;
  --color-text-secondary: #64748b;
  --color-border: #e2e8f0;
  --color-shadow: rgba(0, 0, 0, 0.08);
  
  /* Dark mode */
  --color-bg-dark: #0f172a;
  --color-bg-secondary-dark: #1e293b;
  --color-text-dark: #f1f5f9;
  --color-text-secondary-dark: #cbd5e1;
  --color-border-dark: #334155;
  
  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --container-padding: 1.5rem;
  
  /* Layout */
  --border-radius: 0.75rem;
  --border-radius-sm: 0.5rem;
  --border-radius-full: 9999px;
  --shadow-sm: 0 1px 2px 0 var(--color-shadow);
  --shadow-md: 0 4px 6px -1px var(--color-shadow), 0 2px 4px -1px var(--color-shadow);
  --shadow-lg: 0 10px 15px -3px var(--color-shadow), 0 4px 6px -2px var(--color-shadow);
  --transition: all 0.2s ease-in-out;
}

/* Dark mode overrides */
[data-theme="dark"] {
  --color-bg: var(--color-bg-dark);
  --color-bg-secondary: var(--color-bg-secondary-dark);
  --color-text: var(--color-text-dark);
  --color-text-secondary: var(--color-text-secondary-dark);
  --color-border: var(--color-border-dark);
  --color-shadow: rgba(0, 0, 0, 0.3);
}

/* Reset & Base */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  line-height: 1.6;
}

body {
  margin: 0;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  transition: var(--transition);
}

body.no-scroll {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  margin-top: 0;
  margin-bottom: var(--space-md);
}

h1 { font-size: clamp(var(--font-size-3xl), 5vw, var(--font-size-4xl)); }
h2 { font-size: clamp(var(--font-size-2xl), 4vw, var(--font-size-3xl)); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p { margin-bottom: var(--space-md); }

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

a:hover {
  color: var(--color-primary-dark);
  text-decoration: underline;
}

ul, ol {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

li { margin-bottom: var(--space-xs); }

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: var(--container-padding);
  padding-right: var(--container-padding);
}

/* Grid Utilities */
.grid {
  display: grid;
  gap: var(--space-lg);
}

.grid-2 { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }

/* Section */
.section {
  padding: var(--space-3xl) 0;
}

.section-header {
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--space-2xl) auto;
}

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

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  min-height: 44px;
}

.btn-fullwidth { width: 100%; }

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  transform: translateY(-1px);
}

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

.btn-secondary:hover {
  background-color: var(--color-secondary-dark);
  border-color: var(--color-secondary-dark);
}

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

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

/* Cards */
.card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.deal-card {
  position: relative;
  overflow: hidden;
}

.deal-badge {
  position: absolute;
  top: var(--space-md);
  right: var(--space-md);
  background: var(--color-primary);
  color: white;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

/* Header & Navigation */
.site-header {
  position: sticky;
  top: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 100;
  backdrop-filter: blur(10px);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
}

.logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  text-decoration: none;
  color: var(--color-text);
}

.logo-mark {
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: var(--font-size-xl);
  margin-right: var(--space-xs);
}

.logo-dot {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
}

.nav-list {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  gap: var(--space-lg);
}

.nav-list a {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--border-radius-sm);
  transition: var(--transition);
}

.nav-list a:hover,
.nav-list a.active {
  background-color: var(--color-bg-secondary);
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  gap: 4px;
}

.nav-toggle-bar {
  width: 24px;
  height: 3px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

.theme-toggle {
  background: none;
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius-full);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
}

.theme-toggle:hover {
  border-color: var(--color-primary);
  transform: scale(1.05);
}

.theme-icon {
  font-size: var(--font-size-lg);
  transition: opacity 0.2s ease;
}

.theme-icon-moon { opacity: 0; }
[data-theme="dark"] .theme-icon-sun { opacity: 0; }
[data-theme="dark"] .theme-icon-moon { opacity: 1; }

/* Hero Section */
.hero {
  padding: var(--space-3xl) 0 var(--space-2xl);
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 400px;
  gap: var(--space-2xl);
  align-items: center;
}

.hero-content h1 {
  margin-bottom: var(--space-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
  margin: var(--space-xl) 0;
}

.hero-highlights {
  list-style: none;
  padding: 0;
}

.hero-highlights li::before {
  content: "✓";
  color: var(--color-secondary);
  font-weight: bold;
  margin-right: var(--space-sm);
}

.hero-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  height: fit-content;
}

.hero-deal-list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-lg);
}

.hero-deal-list li {
  display: flex;
  justify-content: space-between;
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.hero-deal-list li:last-child { border-bottom: none; }

/* How It Works */
.how-steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-xl);
}

.how-step {
  text-align: center;
  padding: var(--space-xl);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: white;
  border-radius: var(--border-radius-full);
  font-size: var(--font-size-lg);
  font-weight: bold;
  margin-bottom: var(--space-md);
}

/* Deals Grid */
.deals-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-xl);
}

.deals-grid-listing {
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
}

.deal-meta-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: var(--space-md) 0;
  font-size: var(--font-size-sm);
}

.deal-timer {
  background: var(--color-bg-secondary);
  padding: var(--space-sm);
  border-radius: var(--border-radius-sm);
  margin: var(--space-md) 0;
  font-family: monospace;
  font-size: var(--font-size-sm);
}

.deal-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
}

input,
textarea,
select {
  width: 100%;
  padding: var(--space-md);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  font-family: inherit;
  background: var(--color-bg);
  color: var(--color-text);
  transition: var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea { resize: vertical; min-height: 120px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-xs);
}

.create-form fieldset {
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  margin-bottom: var(--space-xl);
}

fieldset legend {
  font-weight: var(--font-weight-semibold);
  padding: 0 var(--space-md);
}

/* Newsletter */
.newsletter-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: var(--space-xl);
  align-items: center;
  background: var(--color-bg-secondary);
  padding: var(--space-xl);
  border-radius: var(--border-radius);
}

.newsletter-form {
  display: flex;
  gap: var(--space-md);
  max-width: 400px;
}

.newsletter-form input {
  flex: 1;
}

/* Testimonials */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--color-bg-secondary);
  padding: var(--space-xl);
  border-radius: var(--border-radius);
  border-left: 4px solid var(--color-primary);
}

.testimonial-author {
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-top: var(--space-md);
}

/* Footer */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-xl);
  padding: var(--space-2xl) 0;
}

.footer-grid-legal {
  grid-template-columns: 1fr auto;
  gap: var(--space-lg);
}

.footer-legal {
  display: flex;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: var(--space-md) 0;
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.social-list {
  list-style: none;
  padding: 0;
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

/* Ad Spaces */
.ad-wrapper {
  padding: var(--space-lg) 0;
  background: var(--color-bg-secondary);
}

.ad-space {
  background: #f0f0f0;
  border: 1px dashed #ccc;
  border-radius: var(--border-radius-sm);
  padding: var(--space-xl);
  text-align: center;
  color: #666;
  font-size: var(--font-size-sm);
  font-style: italic;
}

.ad-space-banner { min-height: 90px; }
.ad-space-leaderboard { min-height: 90px; }
.ad-space-inline { min-height: 90px; margin: var(--space-xl) 0; }

/* Responsive Design */
@media (max-width: 768px) {
  .container { --container-padding: 1rem; }
  
  .nav-container {
    flex-wrap: wrap;
  }
  
  .main-nav {
    order: 3;
    width: 100%;
  }
  
  .nav-list {
    flex-direction: column;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-top: var(--space-md);
  }
  
  .nav-toggle {
    display: flex;
    order: 2;
  }
  
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-actions {
    justify-content: center;
  }
  
  .form-row { grid-template-columns: 1fr; }
  
  .newsletter-grid,
  .newsletter-form {
    grid-template-columns: 1fr;
    flex-direction: column;
  }
  
  .deals-grid,
  .deals-grid-listing {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .section { padding: var(--space-2xl) 0; }
  
  .btn { 
    padding: var(--space-sm) var(--space-md); 
    font-size: var(--font-size-sm);
  }
  
  .card,
  .deal-card {
    padding: var(--space-lg);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; }
}

.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;
}

/* Utilities */
.text-center { text-align: center; }
.text-sm { font-size: var(--font-size-sm); }
.text-secondary { color: var(--color-text-secondary); }
.mb-lg { margin-bottom: var(--space-xl); }
.mt-lg { margin-top: var(--space-xl); }

/* Deal-specific (for JS) */
.deal-joined {
  font-weight: var(--font-weight-bold);
  color: var(--color-secondary);
}

.btn-join:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-save {
  background: var(--color-bg-secondary);
}

/* Form validation states */
input:invalid:focus,
textarea:invalid:focus,
select:invalid:focus {
  border-color: #ef4444;
  box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.1);
}

/* Loading states */
.loading {
  opacity: 0.6;
  pointer-events: none;
}

/* Policy/Legal page adjustments */
.section-policy-header,
.section-policy-content {
  background: var(--color-bg);
}

.policy-section {
  margin-bottom: var(--space-2xl);
}

.policy-section h2 {
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--space-sm);
}

.policy-section h3 {
  color: var(--color-primary);
}

/* Print styles */
@media print {
  .ad-space,
  .site-header,
  .site-footer { display: none !important; }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  :root {
    --color-shadow: rgba(0, 0, 0, 0.5);
  }
  
  .btn {
    border-width: 3px;
  }
}