:root {
  --primary: #3ce0f6;
  --secondary: #64748b;
  --bg: #ffffff;
  --text: #171717;
  --muted: #f5f7fa;
  --surface: #ffffff;
  --glass: rgba(255, 255, 255, 0.6);
  --shadow: 0 10px 30px rgba(23, 23, 23, 0.08);
  --radius: 16px;
  --transition: 0.3s ease;
  --font-sans: "Poppins", "Inter", "Segoe UI", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}

a:hover,
a:focus {
  color: var(--secondary);
  transform: translateY(-1px);
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius);
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.navbar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.nav-links a {
  font-weight: 600;
  color: var(--text);
}

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

.hero {
  padding: 80px 24px 60px;
  background: linear-gradient(180deg, #e9fbff 0%, #ffffff 70%);
}

.hero-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(2.2rem, 3vw, 3.2rem);
  margin-bottom: 12px;
}

.hero p {
  color: var(--secondary);
  font-size: 1.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: 999px;
  font-weight: 600;
  border: 2px solid var(--primary);
  background: var(--primary);
  color: #ffffff;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: var(--shadow);
}

.btn:hover {
  background: #2cd1e6;
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #ffffff;
}

.section {
  padding: 60px 24px;
}

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

.section-title {
  font-size: clamp(1.8rem, 2.5vw, 2.4rem);
  margin-bottom: 16px;
}

.section-subtitle {
  color: var(--secondary);
  margin-bottom: 32px;
}

.bento-grid {
  display: grid;
  gap: 20px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 40px rgba(23, 23, 23, 0.12);
}

.card .card-content {
  padding: 20px;
}

.card h3 {
  margin: 0 0 8px;
}

.card p {
  color: var(--secondary);
  margin: 0;
}

.glass {
  background: var(--glass);
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.4);
}

.badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--primary);
  color: #ffffff;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.activities {
  background: #f9feff;
}

.activity-list {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.activity-item {
  padding: 20px;
  border-radius: var(--radius);
  background: var(--muted);
  transition: transform var(--transition), background var(--transition);
}

.activity-item:hover {
  background: #eefcff;
  transform: translateY(-2px);
}

.blog-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--primary);
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition), color var(--transition);
}

.blog-link:hover {
  border-color: var(--primary);
  color: var(--secondary);
}

.footer {
  padding: 40px 24px;
  background: #f4f7fb;
  color: var(--secondary);
}

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

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

@media (max-width: 768px) {
  .navbar {
    flex-direction: column;
    gap: 12px;
  }
  .hero {
    padding-top: 60px;
  }
}