/* ========== CSS Variables ========== */
:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #111111;
  --bg-card: #1a1a1a;
  --bg-glass: rgba(255, 255, 255, 0.05);

  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --text-muted: #666666;

  --primary: #8b5cf6;
  --primary-light: #a78bfa;
  --secondary: #ec4899;

  --gradient-primary: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --gradient-card: linear-gradient(145deg, rgba(139, 92, 246, 0.1) 0%, rgba(236, 72, 153, 0.1) 100%);

  --border-color: rgba(255, 255, 255, 0.1);
  --border-radius: 16px;
  --border-radius-sm: 8px;
  --border-radius-lg: 24px;

  --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);

  --container-width: 1200px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

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

/* ========== Container ========== */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ========== Typography ========== */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 14px 28px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-primary);
  color: white;
  box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
  background: var(--bg-glass);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

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

/* ========== Navbar ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  background: rgba(10, 10, 10, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 1.5rem;
  font-weight: 700;
}

.logo-icon {
  font-size: 1.75rem;
}

.nav-links {
  display: flex;
  gap: var(--spacing-md);
}

.nav-links a {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(80px + var(--spacing-xl)) 0 var(--spacing-xl);
  background:
    radial-gradient(ellipse at 20% 20%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(236, 72, 153, 0.1) 0%, transparent 50%),
    var(--bg-primary);
}

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

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: var(--spacing-md);
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 500px;
}

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

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

.phone-mockup {
  width: 280px;
  height: 560px;
  background: var(--bg-card);
  border-radius: 40px;
  padding: 12px;
  border: 3px solid #333;
  box-shadow: var(--shadow), var(--shadow-glow);
}

.phone-screen {
  width: 100%;
  height: 100%;
  background: var(--bg-secondary);
  border-radius: 32px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.mockup-header {
  padding: var(--spacing-sm);
}

.mockup-status-bar {
  width: 80px;
  height: 24px;
  background: #333;
  border-radius: 12px;
  margin: 0 auto;
}

.mockup-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
  gap: var(--spacing-md);
}

.mockup-image-placeholder {
  width: 180px;
  height: 180px;
  background: var(--gradient-card);
  border-radius: var(--border-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 4rem;
  border: 1px solid var(--border-color);
}

.mockup-prompt {
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.mockup-button {
  background: var(--gradient-primary);
  border-radius: var(--border-radius);
  padding: var(--spacing-sm) var(--spacing-md);
  font-weight: 600;
  font-size: 0.875rem;
}

/* ========== Features Section ========== */
.features {
  padding: var(--spacing-xl) 0;
  background: var(--bg-secondary);
}

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

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.3s ease;
}

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

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

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ========== Download Section ========== */
.download {
  padding: var(--spacing-xl) 0;
  background:
    radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.1) 0%, transparent 60%),
    var(--bg-primary);
}

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

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

.store-button {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  transition: all 0.3s ease;
}

.store-button:not(.disabled):hover {
  border-color: var(--primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.store-button.disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.store-button-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.store-label {
  font-size: 0.75rem;
  color: var(--text-secondary);
}

.store-name {
  font-size: 1.125rem;
  font-weight: 600;
}

/* ========== Footer ========== */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding-top: var(--spacing-xl);
}

.footer-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--spacing-xl);
}

.footer-brand p {
  color: var(--text-secondary);
  margin-top: var(--spacing-sm);
}

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

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

.footer-column a {
  display: block;
  color: var(--text-secondary);
  margin-bottom: var(--spacing-xs);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-md) 0;
  border-top: 1px solid var(--border-color);
}

.footer-bottom p {
  color: var(--text-muted);
  font-size: 0.875rem;
  text-align: center;
}

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

  .hero-subtitle {
    margin: 0 auto var(--spacing-lg);
  }

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

  .hero-image {
    order: -1;
  }

  .phone-mockup {
    width: 240px;
    height: 480px;
  }

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

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

  .footer-links {
    justify-items: center;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-xl: 60px;
  }

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

  .hero-title {
    font-size: 2.5rem;
  }

  .hero-subtitle {
    font-size: 1.1rem;
  }

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

  .footer-links {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .nav-links {
    gap: var(--spacing-sm);
  }

  .nav-links a {
    font-size: 0.875rem;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 2rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }

  .download-buttons {
    flex-direction: column;
  }

  .store-button {
    width: 100%;
    justify-content: center;
  }

  .phone-mockup {
    width: 200px;
    height: 400px;
  }

  .mockup-image-placeholder {
    width: 140px;
    height: 140px;
    font-size: 3rem;
  }
}

/* ========== Page Specific ========== */
.page-header {
  padding: calc(80px + var(--spacing-lg)) 0 var(--spacing-lg);
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border-color);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
}

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

.page-content {
  padding: var(--spacing-xl) 0;
}

.page-content h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-top: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

.page-content h2:first-child {
  margin-top: 0;
}

.page-content p {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
}

.page-content ul {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-sm);
  padding-left: var(--spacing-md);
}

.page-content li {
  margin-bottom: var(--spacing-xs);
}

.page-content a {
  color: var(--primary-light);
  text-decoration: underline;
}

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