:root {
  --primary: #2563eb;
  --secondary: #0d9488;
  --accent: #f59e0b;
  --bg-light: #f8fafc;
  --text-dark: #0f172a;
  --text-muted: #64748b;
  --glass: rgba(255, 255, 255, 0.7);
  --glass-border: rgba(255, 255, 255, 0.3);
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1),
    0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
  font-family: "Inter", sans-serif;
  background-color: var(--bg-light);
  color: var(--text-dark);
  line-height: 1.6;
  overflow-x: hidden;
}

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

h1,
h2,
h3 {
  font-family: "Outfit", sans-serif;
  font-weight: 700;
}

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

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: var(--glass);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--glass-border);
  z-index: 1000;
  display: flex;
  align-items: center;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 500;
  transition: color 0.3s;
}

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

.btn {
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

/* Hero Section */
.hero {
  padding: 160px 0 100px;
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background-image: url("images/hero_bg.png");
  background-size: cover;
  background-position: center;
  opacity: 0.4;
}

.hero-content {
  max-width: 700px;
}

.hero h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(to right, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero p {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
}

/* Features Section */
.features {
  padding: 100px 0;
  background: white;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

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

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2.5rem;
  border-radius: 1.5rem;
  background: var(--bg-light);
  border: 1px solid #e2e8f0;
  transition: all 0.3s;
}

.feature-card:hover {
  transform: translateY(-10px);
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: white;
  border-radius: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.feature-card h3 {
  margin-bottom: 1rem;
  font-size: 1.25rem;
}

/* App Showcase */
.showcase {
  padding: 100px 0;
  background: var(--bg-light);
}

.showcase-inner {
  display: flex;
  align-items: center;
  gap: 4rem;
}

.showcase-img {
  flex: 1;
  border-radius: 1rem;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 4px solid white;
}

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

.showcase-content {
  flex: 1;
}

/* Footer */
footer {
  background: var(--text-dark);
  color: white;
  padding: 4rem 0 2rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2rem;
}

.footer-copy {
  text-align: center;
  color: #64748b;
  font-size: 0.875rem;
  border-top: 1px solid #1e293b;
  padding-top: 2rem;
}

@media (max-width: 768px) {
  .hero h1 {
    font-size: 2.5rem;
  }
  .showcase-inner {
    flex-direction: column;
  }
  nav {
    display: none;
  }
}