:root {
  /* Color Palette - Deep Blue & Purple Theme */
  --pk-bg-primary: #0a0a0f;
  --pk-bg-secondary: #13131f;
  --pk-accent-primary: #6c5ce7;
  --pk-accent-secondary: #a29bfe;
  --pk-accent-glow: rgba(108, 92, 231, 0.5);
  --pk-text-primary: #ffffff;
  --pk-text-secondary: #a0a0b0;
  --pk-glass-bg: rgba(255, 255, 255, 0.03);
  --pk-glass-border: rgba(255, 255, 255, 0.08);
  --pk-glass-highlight: rgba(255, 255, 255, 0.1);
  --pk-surface-dark: #1e1e2e;

  /* Spacing & Layout */
  --pk-container-width: 1200px;
  --pk-spacing-unit: 1rem;
  --pk-header-height: 80px;

  /* Typography */
  --pk-font-sans: 'Open Sans', system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--pk-bg-primary);
  color: var(--pk-text-primary);
  font-family: var(--pk-font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(108, 92, 231, 0.15) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(162, 155, 254, 0.1) 0%, transparent 40%);
}

a {
  text-decoration: none;
  color: inherit;
  transition: all 0.2s ease;
}

/* Utilities */
.container {
  max-width: var(--pk-container-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.glass-card {
  background: var(--pk-glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--pk-glass-border);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.text-gradient {
  background: linear-gradient(135deg, #fff 0%, var(--pk-accent-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Header */
header {
  height: var(--pk-header-height);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--pk-glass-border);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--pk-text-primary);
}

.logo img {
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  color: var(--pk-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

.nav-links a:hover {
  color: var(--pk-text-primary);
  text-shadow: 0 0 20px var(--pk-accent-glow);
}

/* Hero Section */
.hero {
  padding: 180px 0 100px;
  text-align: center;
  position: relative;
}

/* Glow Effect behind hero */
.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, var(--pk-accent-glow) 0%, transparent 70%);
  opacity: 0.3;
  z-index: -1;
  pointer-events: none;
}

.hero h1 {
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero p {
  color: var(--pk-text-secondary);
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 3rem;
}

.cta-group {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: 5rem;
}

.btn {
  padding: 0.875rem 2rem;
  border-radius: 99px;
  font-weight: 600;
  font-size: 1.05rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.btn-primary {
  background: var(--pk-accent-primary);
  color: white;
  background: linear-gradient(135deg, var(--pk-accent-primary) 0%, #5646c2 100%);
  box-shadow: 0 10px 30px -10px var(--pk-accent-primary);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 40px -12px var(--pk-accent-primary);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--pk-text-primary);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

/* App Preview Image */
.app-preview-wrapper {
  perspective: 1000px;
  margin: 0 auto;
  max-width: 1000px;
}

.app-preview {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.6);
  border: 1px solid var(--pk-glass-border);
  transform: rotateX(2deg);
  transition: transform 0.5s ease;
  position: relative;
}

.app-preview:hover {
  transform: rotateX(0deg);
}

.app-preview img {
  width: 100%;
  height: auto;
  display: block;
}

/* Features Grid */
.features {
  padding: 100px 0;
}

.section-title {
  text-align: center;
  margin-bottom: 5rem;
}

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.section-title p {
  color: var(--pk-text-secondary);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  transition: transform 0.3s ease, background 0.3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card:hover {
  transform: translateY(-5px);
  background: rgba(255, 255, 255, 0.05);
}

.icon-box {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  background: rgba(108, 92, 231, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--pk-accent-secondary);
  font-size: 1.5rem;
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
}

.feature-card p {
  color: var(--pk-text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* Comparison Section */
.showcase {
  padding: 100px 0;
  position: relative;
}

.showcase-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.showcase-text h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
}

.showcase-text p {
  color: var(--pk-text-secondary);
  margin-bottom: 2rem;
  font-size: 1.1rem;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.feature-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--pk-text-secondary);
}

.check-icon {
  color: var(--pk-accent-primary);
}

/* Footer */
footer {
  padding: 80px 0 40px;
  border-top: 1px solid var(--pk-glass-border);
  background: #050508;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 4rem;
  margin-bottom: 4rem;
}

.footer-brand h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.footer-brand p {
  color: var(--pk-text-secondary);
  max-width: 300px;
}

.footer-col h4 {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--pk-text-secondary);
  margin-bottom: 1.5rem;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col a:hover {
  color: var(--pk-accent-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--pk-glass-border);
  color: var(--pk-text-secondary);
  font-size: 0.9rem;
}

/* Animations */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero .container>* {
  animation: fadeIn 0.8s ease-out forwards;
  opacity: 0;
  /* meaningful start state */
}

.hero h1 {
  animation-delay: 0.1s;
}

.hero p {
  animation-delay: 0.2s;
}

.cta-group {
  animation-delay: 0.3s;
}

.app-preview-wrapper {
  animation-delay: 0.5s;
}

/* Feature Rows (Zig-Zag) */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
  margin-bottom: 8rem;
}

.feature-row.reversed {
  direction: rtl;
  /* simple trick for reversing grid order visually */
}

.feature-row.reversed .feature-text {
  direction: ltr;
  /* Reset text direction */
}

.feature-text h3 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: var(--pk-text-primary);
}

.feature-text p {
  color: var(--pk-text-secondary);
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.image-container,
.clickable-image {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--pk-glass-border);
  transition: transform 0.3s ease;
  position: relative;
  cursor: pointer;
}

.image-container:hover,
.clickable-image:hover {
  transform: translateY(-5px);
}

.image-container img,
.clickable-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* Click hint overlay on hover */
.clickable-image::after {
  content: 'Click to toggle view';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: rgba(0, 0, 0, 0.7);
  color: white;
  padding: 8px 16px;
  border-radius: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
  pointer-events: none;
  font-size: 0.9rem;
  font-weight: 500;
}

.clickable-image:hover::after {
  opacity: 1;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

/* Responsive */
@media (max-width: 900px) {
  .hero {
    padding: 120px 0 60px;
  }

  .hero h1 {
    font-size: 2.5rem;
    padding: 0 1rem;
  }

  .nav-links {
    display: none;
  }

  .feature-row {
    grid-template-columns: 1fr;
    gap: 3rem;
    margin-bottom: 5rem;
    direction: ltr !important;
    /* Force LTR on mobile for stacking */
  }

  .feature-row.reversed {
    direction: ltr;
  }

  .feature-text {
    text-align: center;
    padding: 0 1rem;
    direction: ltr;
    /* Ensure text is LTR */
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }

  .footer-brand p {
    margin: 0 auto;
  }

  /* Fix container padding on small screens to prevent edge-sticking */
  .container {
    padding: 0 1.5rem;
    width: 100%;
  }

  .cta-group {
    flex-direction: column;
    align-items: stretch;
    padding: 0 2rem;
  }

  .btn {
    justify-content: center;
  }
}