:root {
  /* Brand Colors */
  --color-charcoal: #343233;
  --color-sky-blue: #5091BF;
  --color-teal: #2ECEAC;
  --color-gold: #FED739;
  --color-orange: #FF4000;
  
  /* Semantic Colors */
  --color-bg: #343233;
  --color-bg-dark: #1A1918;
  --color-bg-light: #4D4B4A;
  --color-primary: #2ECEAC;
  --color-cta: #FF4000;
  --color-cta-hover: #CC3300;
  --color-accent-1: #5091BF;
  --color-accent-2: #FED739;
  --color-text: #FFFFFF;
  --color-text-muted: #888888;
  --color-border: #4D4B4A;
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  
  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 999px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
}

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

html {
  scroll-behavior: smooth;
}

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

a {
  color: var(--color-accent-1);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: var(--space-md);
}

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

/* Navigation */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(52, 50, 51, 0.95);
  backdrop-filter: blur(10px);
  z-index: 1000;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.nav-logo span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  gap: var(--space-lg);
  list-style: none;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(80px + var(--space-3xl)) 0 var(--space-3xl);
  background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-bg-dark) 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 80%;
  height: 150%;
  background: radial-gradient(ellipse, rgba(46, 206, 172, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.hero-text h1 {
  font-size: 3.5rem;
  margin-bottom: var(--space-lg);
}

.hero-text h1 span {
  color: var(--color-primary);
}

.hero-tagline {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

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

.hero-mockups {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  position: relative;
}

.mockup-phone {
  width: 220px;
  height: 450px;
  background: var(--color-bg-dark);
  border-radius: 32px;
  border: 3px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  text-align: center;
  padding: var(--space-md);
  position: relative;
  overflow: hidden;
}

.mockup-phone::before {
  content: '';
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 24px;
  background: var(--color-bg);
  border-radius: 12px;
}

.mockup-phone:first-child {
  transform: rotate(-5deg) translateY(20px);
}

.mockup-phone:last-child {
  transform: rotate(5deg) translateY(-20px);
}

.mockup-phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 28px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: all var(--transition-normal);
  cursor: pointer;
  border: none;
}

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

.btn-primary:hover {
  background: var(--color-cta-hover);
  color: var(--color-text);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 64, 0, 0.3);
}

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

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

/* Features Section */
.features {
  padding: var(--space-3xl) 0;
  background: var(--color-bg-dark);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title h2 {
  margin-bottom: var(--space-md);
}

.section-title p {
  color: var(--color-text-muted);
  max-width: 600px;
  margin: 0 auto;
}

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

.feature-card {
  background: var(--color-bg);
  padding: var(--space-xl);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--color-border);
  transition: all var(--transition-normal);
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--color-primary);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-1));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
}

.feature-card h4 {
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.feature-card p {
  color: var(--color-text-muted);
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* Screenshots Section */
.screenshots {
  padding: var(--space-3xl) 0;
}

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

.screenshot-item {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  aspect-ratio: 9/16;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  font-size: 0.875rem;
  transition: all var(--transition-normal);
}

.screenshot-item:hover {
  transform: scale(1.02);
  border-color: var(--color-primary);
}

.screenshot-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Download Section */
.download {
  padding: var(--space-3xl) 0;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg) 50%, var(--color-bg-dark) 100%);
  text-align: center;
}

.download h2 {
  margin-bottom: var(--space-md);
}

.download p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

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

.store-btn {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition-normal);
}

.store-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.store-btn-icon {
  font-size: 1.5rem;
}

.store-btn-text {
  text-align: left;
}

.store-btn-text small {
  display: block;
  font-size: 0.625rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  opacity: 0.7;
}

.store-btn-text span {
  font-weight: 600;
  font-size: 1rem;
}

/* Footer */
.footer {
  background: var(--color-bg-dark);
  padding: var(--space-3xl) 0 var(--space-lg);
  border-top: 1px solid var(--color-border);
}

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

.footer-brand p {
  color: var(--color-text-muted);
  margin-top: var(--space-md);
  font-size: 0.875rem;
}

.footer-section h4 {
  color: var(--color-text);
  margin-bottom: var(--space-md);
  font-size: 0.875rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--space-sm);
}

.footer-section a {
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

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

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

.social-link {
  width: 40px;
  height: 40px;
  background: var(--color-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
  transition: all var(--transition-normal);
}

.social-link:hover {
  background: var(--color-primary);
  color: var(--color-text);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

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

/* Page Header */
.page-header {
  padding: calc(80px + var(--space-3xl)) 0 var(--space-xl);
  background: var(--color-bg-dark);
  text-align: center;
}

.page-header h1 {
  margin-bottom: var(--space-md);
}

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

/* Content Section */
.content-section {
  padding: var(--space-3xl) 0;
}

.content-section h2 {
  margin-bottom: var(--space-lg);
  color: var(--color-primary);
  font-size: 1.25rem;
}

.content-section h3 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  font-size: 1rem;
}

.content-section p,
.content-section li {
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.content-section ul,
.content-section ol {
  padding-left: var(--space-xl);
  margin-bottom: var(--space-md);
}

.content-section a {
  color: var(--color-primary);
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

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

.form-group label {
  display: block;
  margin-bottom: var(--space-sm);
  font-weight: 500;
  font-size: 0.875rem;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: var(--space-md);
  background: var(--color-bg-dark);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%23888888' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}

/* About Page */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-image {
  background: var(--color-bg-dark);
  border-radius: var(--radius-lg);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .hero-buttons {
    justify-content: center;
  }
  
  .hero-mockups {
    order: -1;
    margin-bottom: var(--space-xl);
  }
  
  .mockup-phone {
    width: 180px;
    height: 360px;
  }
  
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
  
  .about-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-border);
  }
  
  .nav-links.active {
    display: flex;
  }
  
  .nav-toggle {
    display: block;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .mockup-phone {
    width: 140px;
    height: 280px;
  }
  
  .mockup-phone:first-child,
  .mockup-phone:last-child {
    transform: none;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .screenshots-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .social-links {
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: var(--space-md);
    text-align: center;
  }
  
  .footer-legal {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .hero-mockups {
    flex-direction: column;
    align-items: center;
  }
  
  .mockup-phone {
    width: 200px;
    height: 400px;
  }
  
  .store-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .screenshots-grid {
    grid-template-columns: 1fr;
  }
}