:root {
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: #0f172a;
  background-color: #f6f5f2;
}

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

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  margin: 0;
  background: radial-gradient(circle at top, #f3f4f7 0%, #f6f5f2 45%, #f4f5f4 100%);
  color: #0f172a;
}

.app-shell__header {
  border-bottom: 1px solid #d8dde3;
}

.app-shell__inner {
  width: min(1024px, calc(100% - 2rem));
  margin: 0 auto;
}

.app-brand {
  display: inline-block;
  margin: 1rem 0;
  font-size: 1.2rem;
  letter-spacing: 0.03em;
  font-weight: 700;
  text-transform: uppercase;
}

.app-shell__nav {
  display: flex;
  gap: 1rem;
  padding: 0.5rem 0 1rem;
}

.app-shell__nav a {
  text-decoration: none;
  color: #f8fafc;
}

.app-shell__nav a:hover {
  text-decoration: underline;
}

.app-content {
  padding: 2rem 0;
}

.app-content__body {
  background: #ffffff;
  border: 1px solid #d9dee6;
  border-radius: 12px;
  box-shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
  padding: 2rem;
  min-height: 280px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
}

.hero p {
  margin-top: 0.75rem;
  color: #374151;
}

.app-shell__footer {
  margin-top: 2rem;
  padding: 1rem 0 2rem;
  color: #475569;
  font-size: 0.9rem;
}

.app-shell__footer a {
  color: inherit;
}