:root {
  --bg-main: #f8fafc;
  --bg-panel: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --border: #e2e8f0;
  --primary: #4f46e5;
  --primary-soft: #eef2ff;
  --primary-hover: #4338ca;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
  --radius: 16px;
}

* { box-sizing: border-box; }
a { text-decoration: none; color: inherit; }

body {
  margin: 0;
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-image:
    radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(6, 182, 212, 0.05) 0%, transparent 40%);
}

.shell { max-width: 800px; margin: 0 auto; padding: 20px; padding-top:0px;}