:root {
  --color-bg: #f8fbff;
  --color-bg-glass: rgba(255, 255, 255, 0.7);
  --color-text: #1a2530;
  --color-text-light: #5a6b7c;
  --color-accent: #00bcd4; /* Cyan / Turquoise */
  --color-accent-dark: #008ba3;
  --color-white: #ffffff;
  
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
  
  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  
  --glass-blur: blur(16px);
  --glass-border: 1px solid rgba(255, 255, 255, 0.4);
}

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

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* Glassmorphism Navbar */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 5%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 1000;
  background: var(--color-bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: var(--glass-border);
  transition: all 0.3s ease;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  text-decoration: none;
  color: var(--color-text);
}

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

nav {
  display: flex;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s ease;
}

nav a:hover, nav a.active {
  color: var(--color-accent);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-white);
  box-shadow: 0 4px 14px 0 rgba(0, 188, 212, 0.39);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 188, 212, 0.23);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-white);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

/* Typography */
h1, h2, h3 {
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
}

h2 {
  font-size: clamp(2rem, 3vw, 3rem);
  font-weight: 700;
  margin-bottom: 1.5rem;
}

.subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  font-weight: 400;
  margin-bottom: 2rem;
  max-width: 600px;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 5%;
}

.section {
  padding: 8rem 0;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 5rem; /* Account for navbar */
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -2;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to right, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.4) 50%, rgba(255,255,255,0) 100%);
  z-index: -1;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 600px;
}

/* Cards */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 4rem;
}

.glass-card {
  background: var(--color-bg-glass);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: var(--glass-border);
  border-radius: 24px;
  padding: 2.5rem;
  box-shadow: var(--shadow-md);
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
}

.glass-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(255,255,255,0.8);
}

.glass-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 12px;
  margin-bottom: 1.5rem;
}

.glass-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.glass-card p {
  color: var(--color-text-light);
  margin-bottom: 1.5rem;
  flex-grow: 1;
}

/* Footer */
footer {
  background-color: var(--color-white);
  padding: 4rem 5% 2rem;
  border-top: 1px solid rgba(0,0,0,0.05);
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.footer-nav {
  margin: 2rem 0;
  display: flex;
  gap: 1.5rem;
}

.footer-nav a {
  color: var(--color-text-light);
  text-decoration: none;
}

.footer-bottom {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid rgba(0,0,0,0.05);
  width: 100%;
  text-align: center;
  font-size: 0.875rem;
  color: var(--color-text-light);
}

/* Detail Page Specific */
.detail-hero {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.detail-hero .hero-overlay {
  background: rgba(0,0,0,0.4); /* Darker overlay for text readability on images */
}

.detail-hero-content {
  color: var(--color-white);
  z-index: 1;
  max-width: 800px;
}

.detail-hero-content .subtitle {
  color: rgba(255,255,255,0.8);
  margin: 0 auto 2rem;
}

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

.feature-text ul {
  list-style: none;
  margin-top: 2rem;
}

.feature-text li {
  margin-bottom: 1rem;
  padding-left: 2rem;
  position: relative;
}

.feature-text li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: bold;
}

.feature-image img {
  width: 100%;
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
}

.price-tag {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-accent);
  margin: 2rem 0;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 1rem 5%;
  }
  
  nav {
    display: none; /* Hide on mobile for prototype simplicity */
  }
  
  .hero-overlay {
    background: linear-gradient(to bottom, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
  }
  
  .hero-content {
    text-align: center;
    margin: 0 auto;
  }
  
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .feature-image {
    order: -1;
  }
}