:root {
  --bg: #ffffff;
  --ink: #0b0f19;
  --text: #1f2937;
  --muted: #6b7280;
  --blue: #1f6fff;
  --blue-600: #1558d6;
  --border: #e5e7eb;
  --soft: #f9fafb;
  --white: #ffffff;
}

/* Reset + basics */
* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; padding: 0; }
body {
  font-family: 'Inter', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  font-size: 16px;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

h1, h2, h3, h4, h5 {
  color: var(--ink);
  margin: 0 0 10px;
  font-weight: 700;
}

p { margin: 0 0 12px; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 20px;
}

.section { padding: 40px 0; }

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  font-weight: 600;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  background: var(--blue);
  color: #fff;
  text-decoration: none;
  transition: background .2s ease-in-out;
}
.btn:hover { background: var(--blue-600); }

.muted { color: var(--muted); }