/* Theme */
:root {
  --green-600: #2563eb; /* blue-600 */
  --green-700: #1d4ed8; /* blue-700 */
  --green-100: #e7f0ff; /* blue-100 */
  --ink-900: #0b1b1a;
  --ink-700: #243736;
  --ink-500: #4a6362;
  --bg: #f7faf9;
  --white: #ffffff;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
}

/* Reset */
* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color: var(--ink-900);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--green-700); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Layout */
.container {
  width: 100%;
  max-width: 1100px;
  padding: 0 20px;
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.75);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.brand { font-weight: 700; letter-spacing: 0.5px; }
.logo {
  display: inline-block;
  background: var(--green-600);
  color: var(--white);
  padding: 8px 10px;
  border-radius: 8px;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  font-size: 22px;
}

.nav-menu { display: flex; gap: 22px; list-style: none; margin: 0; padding: 0; }
.nav-menu a { font-weight: 500; color: var(--ink-900); }
.nav-menu a:hover { color: var(--green-700); text-decoration: none; }

.hero {
  background: linear-gradient(180deg, var(--green-100), rgba(255,255,255,0));
  padding: 72px 0;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.2;
  margin: 0 0 12px 0;
}

.hero p { color: var(--ink-700); margin: 0 0 22px 0; }

.hero-ctas { display: flex; gap: 12px; flex-wrap: wrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--green-600);
  color: var(--white);
}
.btn-primary:hover { background: var(--green-700); text-decoration: none; }
.btn-ghost {
  background: var(--white);
  color: var(--ink-900);
  border-color: rgba(0,0,0,0.08);
}
.btn-ghost:hover { border-color: rgba(0,0,0,0.18); text-decoration: none; }

.hero-art { position: relative; height: 320px; }
.blob {
  position: absolute;
  inset: 0;
  border-radius: 24px;
  background: radial-gradient(120% 120% at 10% 10%, #93c5fd, transparent 50%),
    radial-gradient(120% 120% at 90% 20%, #60a5fa, transparent 50%),
    radial-gradient(120% 120% at 50% 90%, #3b82f6, transparent 50%);
  box-shadow: var(--shadow);
}

.section { padding: 64px 0; }
.section-alt { background: #ffffff; }
.section h2 { font-size: 28px; margin: 0 0 8px 0; }
.section-lead { color: var(--ink-500); margin: 0 0 24px 0; }

.pill-list { display: flex; flex-wrap: wrap; gap: 10px; padding: 0; list-style: none; }
.pill-list li { background: var(--white); border: 1px solid rgba(0,0,0,0.06); padding: 8px 12px; border-radius: 999px; }

.grid { display: grid; gap: 20px; }
.cards { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.card {
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card h3 { margin-top: 0; margin-bottom: 8px; font-size: 20px; }
.card p { margin: 0 0 14px 0; color: var(--ink-700); }
.card-actions { display: flex; gap: 12px; }
.link { font-weight: 600; }

.site-footer { border-top: 1px solid rgba(0,0,0,0.06); background: #ffffff; }
.footer-inner { display: flex; gap: 12px; align-items: center; justify-content: space-between; height: 70px; }
.back-to-top { color: var(--ink-700); }

/* Responsive */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-art { height: 200px; }
  .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .nav-toggle { display: inline-block; }
  .nav-menu { display: none; position: absolute; right: 20px; top: 64px; background: #ffffff; border: 1px solid rgba(0,0,0,0.06); border-radius: 10px; padding: 10px 12px; box-shadow: var(--shadow); flex-direction: column; gap: 10px; }
  .nav-menu.open { display: flex; }
  .cards { grid-template-columns: 1fr; }
}

/* Utilities */
.visually-hidden {
  position: absolute !important;
  height: 1px; width: 1px;
  overflow: hidden; clip: rect(1px, 1px, 1px, 1px);
  white-space: nowrap; border: 0; padding: 0; margin: -1px;
}