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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--text-base);
  line-height: var(--leading-relaxed);
  color: var(--color-text);
  background-color: var(--color-background);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Responsive Images */
img {
  max-width: 100%;
  height: auto;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-weight: var(--font-bold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  margin: 0 0 var(--space-4);
}

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

a:hover {
  color: var(--color-accent-hover);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  line-height: 1;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

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

.btn-secondary {
  background-color: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-border);
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.header.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--color-primary);
  text-decoration: none;
}

.logo svg {
  width: 40px;
  height: 28px;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

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

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

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

.mobile-menu-btn svg {
  width: 24px;
  height: 24px;
  stroke: var(--color-primary);
}

/* Mobile Navigation */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background-color: var(--color-background);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
  }

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

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: var(--space-4) var(--container-padding);
    border-bottom: 1px solid var(--color-border);
  }

  .nav .btn {
    display: none;
  }

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

/* Hero Section */
.hero {
  padding: calc(72px + var(--space-24)) 0 var(--space-24);
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-alt) 100%);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  margin-bottom: var(--space-6);
  font-size: clamp(var(--text-4xl), 5vw, var(--text-6xl));
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-10);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* Services Section */
.services {
  padding: var(--space-24) 0;
  background-color: var(--color-background);
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.section-header h2 {
  margin-bottom: var(--space-4);
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--space-8);
}

.service-card {
  padding: var(--space-8);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

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

.service-icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}

.service-card h3 {
  margin-bottom: var(--space-3);
}

.service-card p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.service-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.service-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.service-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* About Section */
.about {
  padding: var(--space-24) 0;
  background-color: var(--color-background-alt);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

@media (max-width: 768px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.about-text h2 {
  margin-bottom: var(--space-6);
}

.about-text p {
  color: var(--color-text-secondary);
  font-size: var(--text-lg);
}

.about-features {
  display: grid;
  gap: var(--space-6);
}

.feature-item {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
}

.feature-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-accent);
  color: white;
  border-radius: var(--radius-md);
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature-item h4 {
  margin-bottom: var(--space-1);
}

.feature-item p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin: 0;
}

/* Contact Section */
.contact {
  padding: var(--space-24) 0;
  background-color: var(--color-background);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
}

@media (max-width: 768px) {
  .contact-grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.contact-form h3 {
  margin-bottom: var(--space-6);
}

.form-group {
  margin-bottom: var(--space-4);
}

.form-group label {
  display: block;
  margin-bottom: var(--space-2);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-info h3 {
  margin-bottom: var(--space-6);
}

.contact-info p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.contact-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.contact-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.contact-item svg {
  width: 20px;
  height: 20px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.contact-item a {
  color: var(--color-text);
}

.contact-item a:hover {
  color: var(--color-accent);
}

/* Form Success Message */
.form-success {
  display: none;
  padding: var(--space-6);
  background-color: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-success);
  border-radius: var(--radius-md);
  text-align: center;
}

.form-success.show {
  display: block;
}

.form-success h4 {
  color: var(--color-success);
  margin-bottom: var(--space-2);
}

/* Footer */
.footer {
  padding: var(--space-16) 0 var(--space-8);
  background-color: var(--color-primary);
  color: white;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

@media (max-width: 768px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

.footer-brand .logo {
  color: white;
  margin-bottom: var(--space-4);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  max-width: 300px;
}

.footer-links h4 {
  color: white;
  margin-bottom: var(--space-4);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-links ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--text-sm);
}

.footer-links a:hover {
  color: white;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-bottom p {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-sm);
  margin: 0;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
  font-size: var(--text-sm);
}

.footer-bottom a:hover {
  color: white;
}

/* Utility Classes */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s ease-out forwards;
}

/* Scroll animations */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================
   Apps Section
   ========================================== */

.apps {
  padding: var(--space-24) 0;
  background-color: var(--color-background-alt);
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(350px, 100%), 1fr));
  gap: var(--space-8);
}

.app-card {
  display: flex;
  flex-direction: column;
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

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

.app-card-image {
  aspect-ratio: 16 / 9;
  background-color: var(--color-background-alt);
  overflow: hidden;
}

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

.app-card-content {
  padding: var(--space-6);
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.app-card-content h3 {
  margin-bottom: var(--space-2);
}

.app-tagline {
  color: var(--color-accent);
  font-weight: var(--font-medium);
  font-size: var(--text-sm);
  margin-bottom: var(--space-3);
}

.app-card-content > p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.app-features-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6);
}

.app-features-list li {
  position: relative;
  padding-left: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.app-features-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.app-card-actions {
  display: flex;
  gap: var(--space-3);
  margin-top: auto;
}

.app-card-actions .btn {
  flex: 1;
  text-align: center;
}

@media (max-width: 480px) {
  .apps-grid {
    grid-template-columns: 1fr;
  }

  .app-card-actions {
    flex-direction: column;
  }
}

/* ==========================================
   MealWise Landing Page Styles
   ========================================== */

/* MealWise Hero */
.mealwise-hero {
  padding: calc(72px + var(--space-16)) 0 var(--space-16);
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-alt) 100%);
}

.mealwise-hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (max-width: 768px) {
  .mealwise-hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.mealwise-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.mealwise-hero h1 {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-5xl));
  margin-bottom: var(--space-6);
}

.mealwise-hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 540px;
}

@media (max-width: 768px) {
  .mealwise-hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

.mealwise-hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .mealwise-hero-buttons {
    justify-content: center;
  }
}

.btn-large {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-lg);
}

.mealwise-hero-image {
  display: flex;
  justify-content: center;
}

.mealwise-hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* MealWise Features Section */
.mealwise-features {
  padding: var(--space-24) 0;
  background-color: var(--color-background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--space-8);
}

.mealwise-feature-card {
  padding: var(--space-6);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.mealwise-feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.mealwise-feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.mealwise-feature-icon svg {
  width: 24px;
  height: 24px;
}

.mealwise-feature-card h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
}

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

/* MealWise Showcase Section */
.mealwise-showcase {
  padding: var(--space-24) 0;
  background-color: var(--color-background-alt);
}

.showcase-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
  gap: var(--space-8);
}

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

.showcase-item img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-md);
}

.showcase-item h4 {
  margin-bottom: var(--space-2);
}

.showcase-item p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  margin: 0;
}

/* MealWise CTA Section */
.mealwise-cta {
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e3a5f 100%);
}

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

.mealwise-cta h2 {
  color: white;
  margin-bottom: var(--space-4);
}

.mealwise-cta p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
}

/* ==========================================
   Tracker Landing Page Styles
   ========================================== */

/* Tracker Hero - reuses mealwise-hero patterns */
.tracker-hero {
  padding: calc(72px + var(--space-16)) 0 var(--space-16);
  background: linear-gradient(135deg, var(--color-background) 0%, var(--color-background-alt) 100%);
}

.tracker-hero .container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

@media (max-width: 768px) {
  .tracker-hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
}

.tracker-badge {
  display: inline-block;
  padding: var(--space-1) var(--space-3);
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-accent);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  border-radius: var(--radius-full);
  margin-bottom: var(--space-4);
}

.tracker-hero h1 {
  font-size: clamp(var(--text-4xl), 5vw, var(--text-5xl));
  margin-bottom: var(--space-6);
}

.tracker-hero-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
  max-width: 540px;
}

@media (max-width: 768px) {
  .tracker-hero-subtitle {
    margin-left: auto;
    margin-right: auto;
  }
}

.tracker-hero-buttons {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .tracker-hero-buttons {
    justify-content: center;
  }
}

.tracker-hero-image {
  display: flex;
  justify-content: center;
}

.tracker-hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* Tracker Features Section */
.tracker-features {
  padding: var(--space-24) 0;
  background-color: var(--color-background);
}

.tracker-feature-card {
  padding: var(--space-6);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.tracker-feature-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}

.tracker-feature-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-4);
}

.tracker-feature-icon svg {
  width: 24px;
  height: 24px;
}

.tracker-feature-card h3 {
  margin-bottom: var(--space-2);
  font-size: var(--text-xl);
}

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

/* Tracker Use Cases Section - NEW */
.tracker-use-cases {
  padding: var(--space-24) 0;
  background-color: var(--color-background-alt);
}

.use-cases-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--space-8);
}

.tracker-use-case-card {
  padding: var(--space-8);
  background-color: var(--color-background);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.tracker-use-case-card:hover {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}

.tracker-use-case-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(14, 165, 233, 0.1);
  color: var(--color-accent);
  border-radius: var(--radius-full);
  margin: 0 auto var(--space-4);
}

.tracker-use-case-icon svg {
  width: 32px;
  height: 32px;
}

.tracker-use-case-card h3 {
  margin-bottom: var(--space-3);
  font-size: var(--text-xl);
}

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

/* Tracker Showcase Section */
.tracker-showcase {
  padding: var(--space-24) 0;
  background-color: var(--color-background);
}

/* Tracker CTA Section */
.tracker-cta {
  padding: var(--space-24) 0;
  background: linear-gradient(135deg, var(--color-primary) 0%, #1e3a5f 100%);
}

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

.tracker-cta h2 {
  color: white;
  margin-bottom: var(--space-4);
}

.tracker-cta p {
  color: rgba(255, 255, 255, 0.8);
  font-size: var(--text-lg);
  margin-bottom: var(--space-8);
}