/* ==================== CSS VARIABLES ==================== */
:root {
  /* Brand Colors - matching app_colors.dart */
  --primary: #10B981;
  --primary-dark: #059669;
  --primary-light: #D1FAE5;
  --secondary: #3B82F6;
  --secondary-light: #DBEAFE;
  --tertiary: #F59E0B;
  --tertiary-light: #FEF3C7;

  /* Semantic Colors */
  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;

  /* Neutrals - Light Mode */
  --background: #F9FAFB;
  --surface: #FFFFFF;
  --text-primary: #111827;
  --text-secondary: #4B5563;
  --text-tertiary: #9CA3AF;
  --border: #E5E7EB;
  --divider: #D1D5DB;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  --space-xxl: 32px;
  --space-xxxl: 48px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-xxl: 24px;
  --radius-full: 100px;

  /* Typography */
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* 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 -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;
}

/* ==================== RESET & BASE ==================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

/* ==================== UTILITIES ==================== */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

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

/* ==================== TYPOGRAPHY ==================== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

p {
  color: var(--text-secondary);
}

/* ==================== BUTTONS ==================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-dark);
  border-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

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

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

.btn-sm {
  padding: var(--space-sm) var(--space-lg);
  font-size: 0.875rem;
}

.btn-lg {
  padding: var(--space-lg) var(--space-xxl);
  font-size: 1.125rem;
}

.btn-block {
  width: 100%;
}

/* ==================== NAVBAR ==================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(10px);
  transition: all var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

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

.logo-img {
  width: 40px;
  height: 40px;
}

.logo-text {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xxl);
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition-fast);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-primary);
  transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ==================== HERO ==================== */
.hero {
  padding-top: 120px;
  padding-bottom: var(--space-xxxl);
  background: linear-gradient(180deg, var(--surface) 0%, var(--background) 100%);
  overflow: hidden;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xxxl);
  align-items: center;
}

.hero-text h1 {
  margin-bottom: var(--space-xl);
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.8;
  margin-bottom: var(--space-xxl);
  max-width: 540px;
}

.hero-cta {
  display: flex;
  gap: var(--space-lg);
  margin-bottom: var(--space-xxxl);
}

.hero-stats {
  display: flex;
  gap: var(--space-xxl);
}

.stat {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* Phone Mockup */
.hero-image {
  display: flex;
  justify-content: center;
}

.phone-mockup {
  width: 280px;
  height: 560px;
  background: var(--text-primary);
  border-radius: 36px;
  padding: 12px;
  box-shadow: var(--shadow-xl);
  transform: rotate(3deg);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--surface);
  border-radius: 28px;
  padding: var(--space-lg);
  overflow: hidden;
}

.app-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-lg);
}

.app-logo {
  width: 32px;
  height: 32px;
}

.app-header span {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
}

.recipe-card {
  background: var(--background);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  margin-bottom: var(--space-md);
  border: 1px solid var(--border);
}

.recipe-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.625rem;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.recipe-badge.sale {
  background: var(--tertiary-light);
  color: #B45309;
}

.recipe-title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: var(--space-xs);
}

.recipe-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.recipe-meta span:last-child {
  color: var(--primary);
  font-weight: 600;
}

/* ==================== SECTIONS ==================== */
.section {
  padding: var(--space-xxxl) 0;
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto var(--space-xxxl);
}

.section-badge {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.875rem;
  font-weight: 600;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
}

.section-title {
  margin-bottom: var(--space-lg);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
}

/* ==================== PROBLEM SECTION ==================== */
.problem-section {
  background: var(--surface);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.problem-card {
  text-align: center;
  padding: var(--space-xl);
}

.problem-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--tertiary-light);
  color: var(--tertiary);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-lg);
}

.problem-card h3 {
  margin-bottom: var(--space-md);
}

.problem-card p {
  font-size: 0.9375rem;
}

/* ==================== FEATURES SECTION ==================== */
.solution-section {
  background: var(--background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: var(--space-xxl);
  border: 1px solid var(--border);
  transition: all var(--transition-base);
}

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

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
}

.feature-icon.primary {
  background: var(--primary-light);
  color: var(--primary);
}

.feature-icon.secondary {
  background: var(--secondary-light);
  color: var(--secondary);
}

.feature-icon.tertiary {
  background: var(--tertiary-light);
  color: var(--tertiary);
}

.feature-card h3 {
  margin-bottom: var(--space-md);
}

.feature-card p {
  font-size: 0.9375rem;
  line-height: 1.7;
}

/* ==================== HOW IT WORKS ==================== */
.how-it-works-section {
  background: var(--surface);
}

.steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: var(--space-lg);
  max-width: 900px;
  margin: 0 auto;
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 64px;
  background: var(--primary);
  color: white;
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 50%;
  margin-bottom: var(--space-xl);
}

.step-content h3 {
  margin-bottom: var(--space-sm);
}

.step-content p {
  font-size: 0.9375rem;
}

.step-connector {
  flex: 0 0 80px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
  margin-top: 32px;
}

/* ==================== TESTIMONIALS ==================== */
.testimonials-section {
  background: var(--background);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.testimonial-card {
  background: var(--surface);
  border-radius: var(--radius-xl);
  padding: var(--space-xxl);
  border: 1px solid var(--border);
}

.testimonial-content {
  margin-bottom: var(--space-xl);
}

.testimonial-content p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.author-avatar {
  width: 48px;
  height: 48px;
  background: var(--primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
  font-weight: 600;
}

.author-info {
  display: flex;
  flex-direction: column;
}

.author-name {
  font-weight: 600;
  color: var(--text-primary);
}

.author-title {
  font-size: 0.875rem;
  color: var(--text-tertiary);
}

/* ==================== PRICING ==================== */
.pricing-section {
  background: var(--surface);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 1000px;
  margin: 0 auto;
}

.pricing-card {
  background: var(--background);
  border-radius: var(--radius-xl);
  padding: var(--space-xxl);
  border: 2px solid var(--border);
  position: relative;
  transition: all var(--transition-base);
}

.pricing-card:hover {
  transform: translateY(-4px);
}

.pricing-card.featured {
  background: var(--surface);
  border-color: var(--primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-xl);
}

.pricing-card.featured:hover {
  transform: scale(1.05) translateY(-4px);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: white;
  font-size: 0.75rem;
  font-weight: 700;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.pricing-header {
  text-align: center;
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--border);
  margin-bottom: var(--space-xl);
}

.pricing-header h3 {
  font-size: 1.25rem;
  margin-bottom: var(--space-md);
}

.price {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: var(--space-xs);
}

.price-amount {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--text-primary);
}

.price-period {
  color: var(--text-tertiary);
}

.pricing-features {
  margin-bottom: var(--space-xl);
}

.pricing-features li {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  color: var(--text-secondary);
}

.pricing-features li svg {
  flex-shrink: 0;
  color: var(--primary);
}

.pricing-features li strong {
  color: var(--text-primary);
}

/* ==================== CTA SECTION ==================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: white;
}

.cta-content {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.cta-logo {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-xl);
  filter: brightness(0) invert(1);
}

.cta-content h2 {
  color: white;
  margin-bottom: var(--space-md);
}

.cta-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.125rem;
  margin-bottom: var(--space-xxl);
}

.cta-buttons {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
}

.store-badge {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  background: rgba(255, 255, 255, 0.1);
  border: 2px solid rgba(255, 255, 255, 0.3);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  color: white;
  transition: all var(--transition-base);
}

.store-badge:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: rgba(255, 255, 255, 0.5);
}

.store-badge svg {
  width: 32px;
  height: 32px;
}

.store-badge div {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.store-badge-label {
  font-size: 0.75rem;
  opacity: 0.8;
}

.store-badge-store {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.125rem;
}

/* ==================== FOOTER ==================== */
.footer {
  background: var(--text-primary);
  color: white;
  padding: var(--space-xxxl) 0 var(--space-xl);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 2fr;
  gap: var(--space-xxxl);
  padding-bottom: var(--space-xxl);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo {
  margin-bottom: var(--space-lg);
}

.footer-brand .logo-text {
  color: white;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  max-width: 280px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.footer-column h4 {
  color: white;
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-lg);
}

.footer-column a {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  padding: var(--space-sm) 0;
  transition: color var(--transition-fast);
}

.footer-column a:hover {
  color: var(--primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-xl);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

.footer-social {
  display: flex;
  gap: var(--space-lg);
}

.footer-social a {
  color: rgba(255, 255, 255, 0.5);
  transition: color var(--transition-fast);
}

.footer-social a:hover {
  color: var(--primary);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-subtitle {
    margin: 0 auto var(--space-xxl);
  }

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

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

  .hero-image {
    display: none;
  }

  .problems-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .steps {
    flex-direction: column;
    align-items: center;
  }

  .step-connector {
    width: 2px;
    height: 40px;
    background: linear-gradient(180deg, var(--primary), var(--primary-light));
    margin: 0;
  }

  .testimonials-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }

  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .pricing-card.featured {
    transform: none;
    order: -1;
  }

  .pricing-card.featured:hover {
    transform: translateY(-4px);
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-xxl);
  }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--surface);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-lg);
    box-shadow: var(--shadow-lg);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero {
    padding-top: 100px;
  }

  .hero-cta {
    flex-direction: column;
    align-items: center;
  }

  .hero-stats {
    flex-direction: column;
    gap: var(--space-lg);
  }

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

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

  .cta-buttons {
    flex-direction: column;
    align-items: center;
  }

  .store-badge {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }

  .footer-links {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-lg);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  h1 {
    font-size: 2rem;
  }

  h2 {
    font-size: 1.75rem;
  }

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

  .feature-card,
  .testimonial-card,
  .pricing-card {
    padding: var(--space-xl);
  }
}