:root {
  --bg-color: #f8fafc;
  --surface-color: rgba(255, 255, 255, 0.8);
  --border-color: rgba(0, 0, 0, 0.1);
  --text-primary: #0f172a;
  --text-secondary: #475569;
  --accent-color: #f97316;
  --accent-hover: #ea580c;
  --glass-blur: blur(12px);
  --font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

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

body {
  background-color: var(--bg-color);
  color: var(--text-primary);
  font-family: var(--font-family);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Glassmorphism utility */
.glass {
  background: var(--surface-color);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--border-color);
  border-radius: 16px;
}

/* Typography */
h1, h2, h3, h4 {
  color: var(--text-primary);
  line-height: 1.2;
}

h1 { font-size: 3rem; margin-bottom: 1rem; font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 2.25rem; margin-bottom: 1rem; font-weight: 700; }
h3 { font-size: 1.5rem; margin-bottom: 0.5rem; font-weight: 600; }
p { color: var(--text-secondary); margin-bottom: 1.5rem; font-size: 1.125rem; }
a { color: var(--accent-color); text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent-hover); }

/* Layout */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 100;
  padding: 1rem 0;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-links {
  display: flex;
  gap: 2rem;
  align-items: center;
}

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

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

.nav-links a.btn {
  color: #fff;
}

.nav-links a.btn:hover {
  color: #fff;
}

/* Main Content */
main {
  flex: 1;
  padding: 4rem 0;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 1rem 0;
  background: radial-gradient(circle at top, rgba(56, 189, 248, 0.1) 0%, transparent 50%);
}

.hero h1 {
  background: linear-gradient(to right, #fbbf24, #f97316);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  max-width: 600px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  padding: 1rem 2rem;
  background: var(--accent-color);
  color: #fff;
  border-radius: 8px;
  font-weight: 600;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
  box-shadow: 0 4px 14px rgba(56, 189, 248, 0.3);
  border: none;
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-2px);
  background: var(--accent-hover);
  color: #fff;
  box-shadow: 0 6px 20px rgba(56, 189, 248, 0.4);
}

.hero-image {
  margin-top: 4rem;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--border-color);
}

.hero-image img {
  width: 100%;
  display: block;
}

/* Section */
.section {
  padding: 1rem 0;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

/* Grid layout for features/apps */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.stack {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.card {
  padding: 2rem;
  transition: transform 0.3s;
}

.card:hover {
  transform: translateY(-5px);
}

.card h3 {
  color: var(--text-primary);
  margin-bottom: 1rem;
}

.card img {
  width: 100%;
  border-radius: 8px;
  margin-bottom: 1rem;
}

/* Screenshots layout */
.screenshots-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.screenshot {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: transform 0.3s;
}

.screenshot:hover {
  transform: scale(1.02);
}

.screenshot img {
  width: 100%;
  display: block;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.5);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-color);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

/* Footer */
footer {
  padding: 3rem 0;
  border-top: 1px solid var(--border-color);
  background: rgba(255, 255, 255, 0.8);
  margin-top: auto;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-links {
  display: flex;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

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

.copyright {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* Content block styling (e.g. privacy policy) */
.content-block {
  max-width: 800px;
  margin: 0 auto;
}

.content-block h2 {
  margin-top: 3rem;
}

.content-block p {
  color: var(--text-secondary);
}

.content-block ul {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.content-block li {
  margin-bottom: 0.5rem;
}