/* Apple Liquid Glass Theme for Email Summarizer Landing Page */

:root {
  /* Base colors */
  --color-primary: #007AFF;
  --color-primary-dark: #0056b3;
  --color-success: #34C759;
  --color-error: #FF3B30;
  --color-text: #1d1d1f;
  --color-text-secondary: #86868b;
  --color-text-light: #ffffff;

  /* Liquid glass effects */
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-bg-hover: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(255, 255, 255, 0.4);
  --glass-border-subtle: rgba(255, 255, 255, 0.18);
  --glass-blur: 24px;
  --glass-shadow: 0 8px 32px rgba(31, 38, 135, 0.15);
  --glass-shadow-hover: 0 12px 48px rgba(31, 38, 135, 0.25);

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset and base styles */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', sans-serif;
  line-height: 1.5;
  color: var(--color-text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Animated gradient background */
.background {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
  background-size: 400% 400%;
  animation: gradientShift 15s ease infinite;
}

.background::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background:
    radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 40% 40%, rgba(102, 126, 234, 0.2) 0%, transparent 40%);
}

@keyframes gradientShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* Main container */
.container {
  max-width: 600px;
  margin: 0 auto;
  padding: var(--spacing-xl);
  padding-top: var(--spacing-2xl);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

/* Glass card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
  padding: var(--spacing-xl);
  transition: all var(--transition-normal);
}

.glass-card:hover {
  background: var(--glass-bg-hover);
  box-shadow: var(--glass-shadow-hover);
}

/* Hero section */
.hero {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-xl);
}

.app-icon {
  width: 96px;
  height: 96px;
  border-radius: 22px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  margin-bottom: var(--spacing-md);
  transition: transform var(--transition-normal);
}

.app-icon:hover {
  transform: scale(1.05);
}

.app-name {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--spacing-xs);
  background: linear-gradient(135deg, var(--color-text) 0%, #4a4a4a 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tagline {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* Features section */
.features {
  padding: var(--spacing-md);
}

.features-title {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  text-align: center;
  color: var(--color-text-secondary);
}

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

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast);
}

.feature-item:hover {
  background: rgba(0, 0, 0, 0.03);
}

.feature-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, #5856d6 100%);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.feature-icon svg {
  width: 16px;
  height: 16px;
  color: white;
}

.feature-text {
  font-size: 0.8125rem;
  color: var(--color-text);
  line-height: 1.4;
}

/* Download section (now integrated into hero) */
.download-section {
  padding: var(--spacing-lg);
}

.download-title {
  font-size: 1.25rem;
  font-weight: 600;
  text-align: center;
  margin-bottom: var(--spacing-md);
}

/* Email form */
.email-form {
  margin-bottom: var(--spacing-lg);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-xs);
}

.form-input {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1rem;
  border: 1px solid rgba(0, 0, 0, 0.1);
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: all var(--transition-fast);
  outline: none;
}

.form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.15);
}

.form-input::placeholder {
  color: var(--color-text-secondary);
}

.consent-label {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xs);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

.consent-label input[type="checkbox"] {
  width: 16px;
  height: 16px;
  margin-top: 2px;
  accent-color: var(--color-primary);
  cursor: pointer;
}

.consent-label a {
  color: var(--color-primary);
  text-decoration: none;
}

.consent-label a:hover {
  text-decoration: underline;
}

.notify-button {
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(0, 122, 255, 0.1);
  border: 1px solid rgba(0, 122, 255, 0.2);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  margin-top: var(--spacing-md);
}

.notify-button:hover {
  background: rgba(0, 122, 255, 0.15);
}

.divider {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  color: var(--color-text-secondary);
  font-size: 0.8125rem;
}

.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(0, 0, 0, 0.1);
}

/* Download button */
.download-button {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  width: 100%;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1.125rem;
  font-weight: 600;
  color: white;
  background: linear-gradient(135deg, var(--color-primary) 0%, #5856d6 100%);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-normal);
  box-shadow: 0 4px 16px rgba(0, 122, 255, 0.3);
}

.download-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 122, 255, 0.4);
}

.download-button:active {
  transform: translateY(0);
}

.download-button svg {
  width: 24px;
  height: 24px;
}

.download-info {
  text-align: center;
  margin-top: var(--spacing-md);
  font-size: 0.8125rem;
  color: var(--color-text-secondary);
}

.checksum {
  font-family: 'SF Mono', Monaco, 'Courier New', monospace;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  word-break: break-all;
  background: rgba(0, 0, 0, 0.03);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  margin-top: var(--spacing-xs);
  display: block;
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--spacing-lg) 0;
  color: var(--color-text-light);
  font-size: 0.875rem;
}

.footer a {
  color: var(--color-text-light);
  text-decoration: none;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer a:hover {
  opacity: 1;
  text-decoration: underline;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-sm);
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-normal);
}

.modal-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.modal-content {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.2);
  padding: var(--spacing-2xl);
  max-width: 400px;
  width: 90%;
  text-align: center;
  transform: scale(0.9) translateY(20px);
  transition: transform var(--transition-normal);
}

.modal-overlay.visible .modal-content {
  transform: scale(1) translateY(0);
}

.modal-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.modal-text {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-lg);
}

.follow-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 500;
  color: white;
  background: #000;
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.follow-button:hover {
  background: #333;
  transform: scale(1.02);
}

.follow-button svg {
  width: 18px;
  height: 18px;
}

.skip-button {
  display: block;
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--color-text-secondary);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.skip-button:hover {
  color: var(--color-text);
}

/* Responsive */
@media (max-width: 640px) {
  .container {
    padding: var(--spacing-md);
    padding-top: var(--spacing-lg);
  }

  .glass-card {
    padding: var(--spacing-md);
  }

  .hero {
    padding: var(--spacing-md);
  }

  .app-icon {
    width: 72px;
    height: 72px;
    border-radius: 16px;
  }

  .app-name {
    font-size: 1.5rem;
  }

  .tagline {
    font-size: 0.9375rem;
    margin-bottom: var(--spacing-md);
  }

  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-xs);
  }

  .download-button {
    font-size: 1rem;
    padding: var(--spacing-sm) var(--spacing-lg);
  }

  .download-info {
    font-size: 0.75rem;
  }
}

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

  .background {
    animation: none;
    background-position: 0% 50%;
  }
}

/* Focus styles for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

button:focus:not(:focus-visible),
a:focus:not(:focus-visible) {
  outline: none;
}