/* ===== VARIABLES ===== */
:root {
  /* Colors */
  --color-primary: #004fac;
  --color-background: #f7ecdb;
  --color-card-bg: #faf2e7;
  --color-text: #000000;
  --color-text-light: #6e6b63;
  --color-white: #ffffff;
  --color-border: #e0d5c7;

  /* Typography */
  --font-family: 'Nunito Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-md: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-xxl: 1.5rem;
  --font-size-xxxl: 2rem;
  --font-size-hero: 2.5rem;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;
  --spacing-xxxl: 4rem;

  /* Border Radius */
  --radius-sm: 0.25rem;
  --radius-md: 0.5rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-md);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-background);
  overflow-x: hidden;
}

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

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

a:hover {
  opacity: 0.8;
}

ul {
  list-style: none;
}

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

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

.section-title {
  font-size: var(--font-size-xxxl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  text-align: center;
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xxl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== HEADER / NAVIGATION ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--color-background);
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

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

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 700;
  font-size: var(--font-size-xl);
  color: var(--color-primary);
}

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

.nav-list {
  display: flex;
  gap: var(--spacing-xl);
}

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

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--spacing-sm);
}

.hamburger,
.hamburger::before,
.hamburger::after {
  width: 25px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: var(--radius-sm);
  transition: var(--transition-normal);
}

.hamburger::before,
.hamburger::after {
  content: '';
  display: block;
}

.hamburger::before {
  transform: translateY(-8px);
}

.hamburger::after {
  transform: translateY(5px);
}

/* Mobile Navigation */
@media screen and (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background-color: var(--color-background);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    transition: left var(--transition-normal);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-list {
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .nav-link {
    font-size: var(--font-size-lg);
  }
}

/* ===== HERO SECTION ===== */
.hero {
  padding: calc(70px + var(--spacing-xxxl)) var(--spacing-lg) var(--spacing-xxxl);
  background: linear-gradient(180deg, var(--color-background) 0%, var(--color-card-bg) 100%);
}

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

.hero-title {
  font-size: var(--font-size-hero);
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.hero-tagline {
  font-size: var(--font-size-xl);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  font-style: italic;
}

.hero-description {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.store-badge {
  transition: transform var(--transition-fast);
}

.store-badge:hover {
  transform: translateY(-3px);
  opacity: 1;
}

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

.illustration {
  max-width: 100%;
  height: auto;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

@media screen and (max-width: 1024px) {
  .hero-container {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .hero-title {
    font-size: 2rem;
  }

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

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

/* ===== HOW IT WORKS SECTION ===== */
.how-it-works {
  padding: var(--spacing-xxxl) var(--spacing-lg);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.step-card {
  background-color: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.step-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.step-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.step-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.step-description {
  color: var(--color-text-light);
  font-size: var(--font-size-md);
}

/* ===== FEATURES SECTION ===== */
.features {
  padding: var(--spacing-xxxl) var(--spacing-lg);
  background-color: var(--color-card-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background-color: var(--color-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.feature-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  color: var(--color-text-light);
  font-size: var(--font-size-md);
}

/* ===== SCREENSHOTS SECTION ===== */
.screenshots {
  padding: var(--spacing-xxxl) var(--spacing-lg);
}

.carousel {
  position: relative;
  max-width: 400px;
  margin: 0 auto;
}

.carousel-container {
  position: relative;
  overflow: hidden;
}

.carousel-item {
  display: none;
  animation: fadeIn var(--transition-normal);
}

.carousel-item.active {
  display: block;
}

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.phone-mockup {
  background-color: var(--color-white);
  border-radius: 30px;
  padding: var(--spacing-md);
  box-shadow: var(--shadow-lg);
}

.phone-mockup img {
  border-radius: 20px;
  width: 100%;
}

.carousel-dots {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-lg);
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-border);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.dot:hover {
  transform: scale(1.2);
}

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

/* ===== DESIGN STYLES SECTION ===== */
.design-styles {
  padding: var(--spacing-xxxl) var(--spacing-lg);
  background-color: var(--color-card-bg);
}

.styles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
}

.style-card {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.style-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.style-icon {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-sm);
}

.style-name {
  font-size: var(--font-size-lg);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.style-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
}

/* ===== CTA SECTION ===== */
.cta {
  padding: var(--spacing-xxxl) var(--spacing-lg);
  background: linear-gradient(135deg, var(--color-primary) 0%, #003580 100%);
  color: var(--color-white);
}

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

.cta-title {
  font-size: var(--font-size-xxxl);
  font-weight: 700;
  margin-bottom: var(--spacing-md);
}

.cta-description {
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-xxl) var(--spacing-lg) var(--spacing-lg);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

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

.footer-tagline {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  line-height: 1.6;
}

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

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

.footer-link {
  font-size: var(--font-size-md);
  opacity: 0.9;
  transition: opacity var(--transition-fast);
}

.footer-link:hover {
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: var(--spacing-lg);
  text-align: center;
}

.footer-copyright {
  font-size: var(--font-size-sm);
  opacity: 0.8;
}

/* ===== RESPONSIVE TYPOGRAPHY ===== */
@media screen and (max-width: 768px) {
  :root {
    --font-size-hero: 1.75rem;
    --font-size-xxxl: 1.5rem;
    --font-size-xxl: 1.25rem;
  }

  .section-title {
    font-size: 1.75rem;
  }

  .hero-title {
    font-size: 1.75rem;
  }
}

/* ===== ANIMATIONS ===== */
.fade-in {
  animation: fadeIn 0.6s ease-in;
}

.slide-up {
  animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== ACCESSIBILITY ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Focus states for accessibility */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}