:root {
  --bg-main: #050816;
  --bg-elevated: #0b1020;
  --accent: #2c6ef8;
  --accent-soft: rgba(44, 110, 248, 0.18);
  --text-main: #f9fafb;
  --text-muted: #9ca3af;
  --border-soft: rgba(148, 163, 255, 0.35);
  --danger: #f97373;
  --success: #22c55e;

  --radius-lg: 18px;
  --radius-md: 12px;
  --shadow-soft: 0 18px 45px rgba(15, 23, 42, 0.7);
  --shadow-subtle: 0 8px 20px rgba(15, 23, 42, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html,
body {
  height: 100%;
}

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: radial-gradient(circle at top, #1e293b 0, #020617 45%, #000 100%);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  display: block;
}

.app-shell {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  min-height: 100vh;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }
}