/* ==========================================================================
   Boomerang Loyalty App - Stylesheet
   Easily editable CSS for PHP integration
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables (Colors, Typography, Spacing)
   PHP: Customize these values to match your brand
   -------------------------------------------------------------------------- */
:root {
  /* Primary Colors */
  --color-primary: #2563eb;
  --color-primary-dark: #1d4ed8;
  --color-primary-light: #3b82f6;
  --color-primary-foreground: #ffffff;
  
  /* Background Colors */
  --color-background: #ffffff;
  --color-background-muted: #f8fafc;
  --color-card: #ffffff;
  --color-card-border: #e2e8f0;
  
  /* Text Colors */
  --color-text: #0f172a;
  --color-text-muted: #64748b;
  --color-text-light: #94a3b8;
  
  /* Border & Accent */
  --color-border: #e2e8f0;
  --color-accent: #f1f5f9;
  
  /* Status Colors */
  --color-success: #22c55e;
  --color-warning: #f59e0b;
  --color-error: #ef4444;
  
  /* Typography */
  --font-family: 'DM Sans', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 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: 1.875rem;
  
  /* Spacing */
  --spacing-1: 0.25rem;
  --spacing-2: 0.5rem;
  --spacing-3: 0.75rem;
  --spacing-4: 1rem;
  --spacing-5: 1.25rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-10: 2.5rem;
  --spacing-12: 3rem;
  --spacing-16: 4rem;
  
  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-full: 9999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  min-height: 100vh;
}

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

img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
}

h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }

p {
  margin-bottom: var(--spacing-4);
}

.text-muted {
  color: var(--color-text-muted);
}

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

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

.container-sm {
  max-width: 640px;
}

.container-md {
  max-width: 768px;
}

.container-lg {
  max-width: 1024px;
}

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

.section-muted {
  background-color: var(--color-background-muted);
}

/* Flexbox Utilities */
.flex {
  display: flex;
}

.flex-col {
  flex-direction: column;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.justify-center {
  justify-content: center;
}

.gap-2 {
  gap: var(--spacing-2);
}

.gap-3 {
  gap: var(--spacing-3);
}

.gap-4 {
  gap: var(--spacing-4);
}

.gap-6 {
  gap: var(--spacing-6);
}

/* Grid */
.grid {
  display: grid;
  gap: var(--spacing-6);
}

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

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

@media (min-width: 1024px) {
  .lg-grid-cols-3 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-4) var(--spacing-6);
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-3);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background-color: var(--color-primary);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-foreground);
  font-weight: 700;
  font-size: var(--font-size-lg);
}

.logo-text {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-text);
}

.nav {
  display: none;
}

@media (min-width: 768px) {
  .nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-6);
  }
}

.nav-link {
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--color-text);
}

.mobile-menu-btn {
  display: flex;
  padding: var(--spacing-2);
  background: none;
  border: none;
  cursor: pointer;
}

@media (min-width: 768px) {
  .mobile-menu-btn {
    display: none;
  }
}

.mobile-nav {
  display: none;
  flex-direction: column;
  padding: var(--spacing-4) var(--spacing-6);
  gap: var(--spacing-2);
}

.mobile-nav.active {
  display: flex;
}

.mobile-nav-link {
  padding: var(--spacing-2) var(--spacing-3);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-lg);
  transition: all 0.2s ease;
}

.mobile-nav-link:hover {
  color: var(--color-text);
  background-color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  width: 100%;
  /* Use CSS variable for easy customization in HTML: style="--hero-height: 400px" */
  --hero-height: 260px;
  height: var(--hero-height);
  overflow: hidden;
}

@media (min-width: 640px) {
  .hero {
    --hero-height: 290px;
  }
}

@media (min-width: 768px) {
  .hero {
    --hero-height: 340px;
  }
}

.hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.3), transparent);
}

.hero-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: var(--spacing-6);
}

.hero-text {
  text-align: center;
  padding: 0 var(--spacing-4);
}

.hero-title {
  font-size: var(--font-size-xl);
  color: #ffffff;
  margin-bottom: var(--spacing-1);
}

@media (min-width: 640px) {
  .hero-title {
    font-size: var(--font-size-2xl);
  }
}

@media (min-width: 768px) {
  .hero-title {
    font-size: var(--font-size-3xl);
  }
}

.hero-subtitle {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
}

@media (min-width: 640px) {
  .hero-subtitle {
    font-size: var(--font-size-base);
  }
}

/* --------------------------------------------------------------------------
   Cards
   -------------------------------------------------------------------------- */
.card {
  background-color: var(--color-card);
  border: 1px solid var(--color-card-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}

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

.card-header {
  padding: var(--spacing-6);
  padding-bottom: var(--spacing-3);
}

.card-content {
  padding: var(--spacing-6);
  padding-top: var(--spacing-4);
}

.card-footer {
  padding: var(--spacing-6);
  padding-top: 0;
}

.card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.card-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.card-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-2);
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}

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

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

.btn-secondary {
  background-color: var(--color-accent);
  color: var(--color-text);
}

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

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

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

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-base);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* --------------------------------------------------------------------------
   Forms
   -------------------------------------------------------------------------- */
.form-group {
  margin-bottom: var(--spacing-5);
}

.form-label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
}

.form-input {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

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

.form-input::placeholder {
  color: var(--color-text-light);
}

.form-select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right var(--spacing-3) center;
  background-size: 20px;
  padding-right: var(--spacing-10);
}

.form-textarea {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  font-family: inherit;
  color: var(--color-text);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  resize: vertical;
  min-height: 120px;
}

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

.form-checkbox-group {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
}

.form-checkbox {
  width: 18px;
  height: 18px;
  margin-top: 2px;
  accent-color: var(--color-primary);
}

.form-checkbox-label {
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.password-toggle {
  position: relative;
}

.password-toggle-btn {
  position: absolute;
  right: var(--spacing-3);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--spacing-1);
}

/* --------------------------------------------------------------------------
   Badges
   -------------------------------------------------------------------------- */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: 500;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.badge-primary {
  background-color: var(--color-primary);
  color: var(--color-primary-foreground);
}

.badge-secondary {
  background-color: var(--color-accent);
  color: var(--color-text);
}

.badge-success {
  background-color: rgba(34, 197, 94, 0.1);
  color: var(--color-success);
}

/* --------------------------------------------------------------------------
   Icon Placeholder (for SVG icons)
   -------------------------------------------------------------------------- */
.icon {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.icon-sm {
  width: 16px;
  height: 16px;
}

.icon-lg {
  width: 24px;
  height: 24px;
}

.icon-circle {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: rgba(37, 99, 235, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
}

.icon-circle-lg {
  width: 56px;
  height: 56px;
}

/* --------------------------------------------------------------------------
   Welcome Section
   -------------------------------------------------------------------------- */
.welcome-section {
  padding: var(--spacing-10) var(--spacing-6);
  text-align: center;
}

.welcome-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
}

@media (min-width: 768px) {
  .welcome-title {
    font-size: var(--font-size-3xl);
  }
}

.welcome-subtitle {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Feature Cards Section
   -------------------------------------------------------------------------- */
.feature-card {
  display: block;
  text-decoration: none;
}

.feature-card-image {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.feature-card-image img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.feature-card:hover .feature-card-image img {
  transform: scale(1.05);
}

.feature-card-badge {
  position: absolute;
  top: var(--spacing-3);
  right: var(--spacing-3);
}

.feature-card-content {
  padding: var(--spacing-5);
}

.feature-card-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-lg);
  background-color: rgba(37, 99, 235, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-3);
}

.feature-card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-1);
}

.feature-card-subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: var(--spacing-2);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-12) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-8);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-12);
  }
}

.footer-title {
  font-size: var(--font-size-base);
  font-weight: 600;
  margin-bottom: var(--spacing-4);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
}

.footer-link {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  transition: color 0.2s ease;
}

.footer-link:hover {
  color: var(--color-text);
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-3);
}

.footer-bottom {
  margin-top: var(--spacing-10);
  padding-top: var(--spacing-6);
  border-top: 1px solid var(--color-border);
  text-align: center;
}

.footer-copyright {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Page Headers
   -------------------------------------------------------------------------- */
.page-header {
  padding: var(--spacing-10) var(--spacing-6);
  background-color: var(--color-background-muted);
  text-align: center;
}

.page-header-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--spacing-4);
  border-radius: var(--radius-full);
  background-color: rgba(37, 99, 235, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-header-title {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--spacing-2);
}

@media (min-width: 768px) {
  .page-header-title {
    font-size: var(--font-size-3xl);
  }
}

.page-header-description {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --------------------------------------------------------------------------
   Reward Cards
   -------------------------------------------------------------------------- */
.reward-card {
  position: relative;
}

.reward-card.unavailable {
  opacity: 0.6;
}

.reward-card-image {
  position: relative;
}

.reward-card-image img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.reward-card-category {
  position: absolute;
  top: var(--spacing-3);
  right: var(--spacing-3);
}

.reward-card-points {
  display: flex;
  align-items: center;
  gap: var(--spacing-1);
  color: var(--color-primary);
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   Store Cards
   -------------------------------------------------------------------------- */
.store-card {
  display: flex;
  gap: var(--spacing-4);
  padding: var(--spacing-5);
}

.store-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background-color: rgba(37, 99, 235, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
}

.store-info {
  flex: 1;
}

.store-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-2);
}

.store-details {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.store-detail-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-2);
}

/* --------------------------------------------------------------------------
   Privacy/Content Page
   -------------------------------------------------------------------------- */
.content-page {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--spacing-10) var(--spacing-6);
}

.content-page h2 {
  font-size: var(--font-size-xl);
  margin-top: var(--spacing-8);
  margin-bottom: var(--spacing-4);
}

.content-page p {
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-4);
}

.content-page ul {
  margin-left: var(--spacing-6);
  margin-bottom: var(--spacing-4);
  color: var(--color-text-muted);
}

.content-page li {
  margin-bottom: var(--spacing-2);
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }

.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }

.pt-4 { padding-top: var(--spacing-4); }
.pb-4 { padding-bottom: var(--spacing-4); }

.hidden {
  display: none;
}

@media (min-width: 768px) {
  .md-hidden {
    display: none;
  }
  
  .md-block {
    display: block;
  }
  
  .md-flex {
    display: flex;
  }
}