/* Base Styles */
:root {
  /* Colors */
  --color-primary: #FF4B4B;
  --color-primary-light: #FF7373;
  --color-primary-dark: #E63939;
  
  --color-accent: #FF6B6B;
  --color-accent-light: #FF8F8F;
  --color-accent-dark: #E65C5C;
  
  --color-success: #4CAF50;
  --color-warning: #FFC107;
  --color-error: #FF3B30;
  
  --color-text-primary: #333333;
  --color-text-secondary: #666666;
  --color-text-tertiary: #999999;
  
  --color-background: #FFFFFF;
  --color-background-alt: #F8F9FA;
  --color-border: #E5E5E5;
  
  /* Spacing - 8px system */
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 40px;
  --space-6: 48px;
  --space-7: 56px;
  --space-8: 64px;
  
  /* Typography */
  --font-size-xs: 0.75rem;   /* 12px */
  --font-size-sm: 0.875rem;  /* 14px */
  --font-size-md: 1rem;      /* 16px */
  --font-size-lg: 1.125rem;  /* 18px */
  --font-size-xl: 1.25rem;   /* 20px */
  --font-size-2xl: 1.5rem;   /* 24px */
  --font-size-3xl: 1.875rem; /* 30px */
  --font-size-4xl: 2.25rem;  /* 36px */
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  
  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

body {
  font-family: 'Inter', sans-serif;
  color: var(--color-text-primary);
  background-color: var(--color-background) ;
  overflow-x: hidden;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--space-2);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

p {
  margin-bottom: var(--space-2);
  color: var(--color-text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}

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

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

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

.btn-secondary:hover {
  background-color: rgba(255, 75, 75, 0.1);
}

.btn-sm {
  padding: var(--space-1) var(--space-2);
  font-size: var(--font-size-sm);
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background-color: rgba(255, 255, 255, 0.95);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  transition: all var(--transition-normal);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

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

.nav-menu {
  display: flex;
  gap: var(--space-4);
  align-items: center;
}

.nav-menu a {
  font-weight: 600;
  transition: color var(--transition-fast);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

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

/* Hero Section */
.hero {
  padding-top: 120px;
  padding-bottom: var(--space-8);
  background-color: var(--color-background-alt);
}

.hero-content {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.hero-text {
  flex: 1;
}

.hero-text h1 {
  margin-bottom: var(--space-3);
}

.hero-text p {
  margin-bottom: var(--space-4);
  font-size: var(--font-size-lg);
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
}

.phone-mockup {
  max-height: 600px;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.app-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 110px;
  height: 110px;
  background-color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-3);
}

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

.cta-buttons {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

/* Section Styles */
section {
  padding: var(--space-8) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--space-6);
}

.section-header h2 {
  margin-bottom: var(--space-2);
}

/* Features Section */
.features {
  background-color: var(--color-background);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-4);
}

.feature-card {
  padding: var(--space-4);
  border-radius: var(--radius-md);
  background-color: var(--color-background-alt);
  transition: transform var(--transition-fast);
}

.feature-card:hover {
  transform: translateY(-5px);
}

.feature-icon {
  margin-bottom: var(--space-3);
}

.icon-placeholder {
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  border-radius: 50%;
}

/* Screenshots Section */
.screenshots {
  background-color: var(--color-background-alt);
}

.screenshot-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

.screenshot {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.screenshot img {
  width: 100%;
  height: auto;
  transition: transform var(--transition-normal);
}

.screenshot:hover img {
  transform: scale(1.03);
}

/* FAQ Section */
.faq {
  background-color: var(--color-background);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-3) 0;
  cursor: pointer;
}

.faq-question h3 {
  margin: 0;
  font-size: var(--font-size-lg);
}

.faq-toggle {
  position: relative;
  width: 20px;
  height: 20px;
  transition: transform var(--transition-fast);
}

.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  background-color: var(--color-primary);
  border-radius: 2px;
}

.faq-toggle::before {
  width: 100%;
  height: 2px;
  top: 50%;
  transform: translateY(-50%);
}

.faq-toggle::after {
  width: 2px;
  height: 100%;
  left: 50%;
  transform: translateX(-50%);
  transition: opacity var(--transition-fast);
}

.faq-question.active .faq-toggle::after {
  opacity: 0;
}

.faq-answer {
  height: 0;
  overflow: hidden;
  transition: height var(--transition-normal);
  padding: 0 var(--space-2);
}

.faq-answer p {
  padding-bottom: var(--space-3);
}

/* Footer */
.footer {
  background-color: var(--color-background-alt);
  padding: var(--space-6) 0;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--space-4);
}

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

.footer-links ul {
  display: flex;
  gap: var(--space-4);
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: color var(--transition-fast);
}

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

.social-links {
  display: flex;
  gap: var(--space-2);
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background-color: var(--color-primary);
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

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

.copyright {
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
}