/*! modern-normalize v2.0.0 | MIT License | https://github.com/sindresorhus/modern-normalize */
*,
::before,
::after { box-sizing: border-box; }
html { -moz-tab-size: 4; tab-size: 4; line-height: 1.15; -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: system-ui, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif; line-height: 1.5; }
h1, h2, h3, h4 { margin: 0; font-weight: 600; line-height: 1.2; }
img, picture { max-width: 100%; display: block; }
input, button, textarea, select { font: inherit; }
a { color: inherit; text-decoration: none; }

/* CSS Variables */
:root {
  --bg: #ffffff;
  --text: #1f2937;
  --primary: #2b7a3e;
  --primary-dark: #1f5a2e;
  --secondary: #f59e0b;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-600: #4b5563;
  --border: #e5e7eb;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --radius: 0.75rem;
}
.dark {
  --bg: #111827;
  --text: #f9fafb;
  --gray-100: #1f2937;
  --gray-200: #374151;
  --border: #374151;
}
body {
  background: var(--bg);
  color: var(--text);
  transition: background 0.3s, color 0.2s;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--primary);
  color: white;
  padding: 0.6rem 1.2rem;
  border-radius: 2rem;
  font-weight: 500;
  transition: all 0.2s;
  border: none;
  cursor: pointer;
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: white; }
.section-title {
  font-size: 2rem;
  margin-bottom: 2rem;
  text-align: center;
  position: relative;
  display: inline-block;
  width: 100%;
}
.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s;
}
.card:hover { transform: translateY(-4px); }
.grid-3 { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 2rem; }
.grid-4 { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 1.5rem; }
.text-center { text-align: center; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }
/* header */
.header {
  position: sticky;
  top: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  z-index: 100;
}
.nav-links { display: flex; gap: 1.5rem; align-items: center; }
.nav-links a { font-weight: 500; }
.nav-links a:hover { color: var(--primary); }
.menu-btn { display: none; background: none; border: none; cursor: pointer; }
/* footer */
.footer {
  background: var(--gray-100);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
  margin-top: 4rem;
}
/* responsive */
@media (max-width: 768px) {
  .menu-btn { display: block; }
  .nav-links {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: var(--bg);
    flex-direction: column;
    padding: 1rem;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    transition: transform 0.3s;
  }
  .nav-links.open { transform: translateY(0); }
  .container { padding: 0 1rem; }
  .grid-3, .grid-4 { gap: 1rem; }
}