:root {
  /* HSL Color Palette - Deep Space & Mars */
  --primary-h: 210;
  --primary-s: 100%;
  --primary-l: 60%;
  --primary: hsl(var(--primary-h), var(--primary-s), var(--primary-l));
  
  --accent-h: 15;
  --accent-s: 90%;
  --accent-l: 55%;
  --accent: hsl(var(--accent-h), var(--accent-s), var(--accent-l));

  --bg-deep: hsl(222, 47%, 6%);
  --bg-surface: hsla(222, 47%, 12%, 0.7);
  
  --text-main: hsl(210, 40%, 98%);
  --text-muted: hsl(215, 20%, 65%);
  
  --glass-bg: hsla(222, 47%, 12%, 0.4);
  --glass-border: hsla(0, 0%, 100%, 0.1);
  --glass-shine: hsla(0, 0%, 100%, 0.05);

  --shadow-lg: 0 20px 50px -12px rgba(0, 0, 0, 0.5);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background-color: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Background Effects */
.bg-mesh {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2;
  background: radial-gradient(circle at 0% 0%, hsla(var(--primary-h), 100%, 20%, 0.15) 0%, transparent 50%),
              radial-gradient(circle at 100% 100%, hsla(var(--accent-h), 100%, 20%, 0.15) 0%, transparent 50%);
}

.bg-hero-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 50vh;
  z-index: -1;
  background: linear-gradient(to bottom, transparent, var(--bg-deep));
}

.bg-image {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60vh;
  z-index: -3;
  object-fit: cover;
  opacity: 0.6;
  filter: blur(2px) brightness(0.7);
}

/* Layout */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
header {
  padding: 4rem 0;
  text-align: center;
  position: relative;
}

.logo-container {
  display: inline-block;
  margin-bottom: 1rem;
  position: relative;
}

h1 {
  font-size: clamp(3rem, 8vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, var(--text-main) 30%, var(--primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.5rem;
  animation: slideUpFade 1s cubic-bezier(0.16, 1, 0.3, 1);
}

header p {
  font-size: 1.25rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  animation: slideUpFade 1.2s cubic-bezier(0.16, 1, 0.3, 1);
}

/* App Grid */
.app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 2.5rem;
  padding-bottom: 6rem;
}

/* Glass Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--glass-border);
  border-radius: 32px;
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  box-shadow: var(--shadow-lg);
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, var(--glass-shine), transparent);
  transition: left 0.7s ease;
}

.glass-card:hover {
  transform: translateY(-12px) scale(1.02);
  border-color: hsla(var(--primary-h), 100%, 60%, 0.3);
  box-shadow: 0 40px 80px -20px rgba(0, 0, 0, 0.6);
}

.glass-card:hover::before {
  left: 100%;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.icon-box {
  width: 72px;
  height: 72px;
  background: linear-gradient(135deg, hsla(var(--primary-h), 100%, 60%, 0.2), hsla(var(--accent-h), 100%, 50%, 0.2));
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  border: 1px solid var(--glass-border);
}

.app-meta h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: hsla(var(--primary-h), 100%, 60%, 0.1);
  color: var(--primary);
  border-radius: 99px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid hsla(var(--primary-h), 100%, 60%, 0.2);
}

.description {
  color: var(--text-muted);
  font-size: 1rem;
  line-height: 1.6;
  flex-grow: 1;
}

/* Download Button */
.btn-premium {
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: white;
  text-decoration: none;
  padding: 1rem 2rem;
  border-radius: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 20px -5px hsla(var(--primary-h), 100%, 60%, 0.4);
}

.btn-premium:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 30px -5px hsla(var(--primary-h), 100%, 60%, 0.6);
  filter: brightness(1.1);
}

.btn-premium:active {
  transform: translateY(0);
}

/* Animations */
@keyframes slideUpFade {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

footer {
  text-align: center;
  padding: 4rem 0;
  color: var(--text-muted);
  font-size: 0.875rem;
  border-top: 1px solid var(--glass-border);
}

@media (max-width: 768px) {
  h1 { font-size: 3.5rem; }
  .container { padding: 0 1.5rem; }
}