:root {
  --app-bg: linear-gradient(180deg, #e0f2fe 0%, #f8fafc 38%, #eef6ff 100%);
  --app-surface: rgba(255, 255, 255, 0.88);
  --app-border: rgba(14, 116, 144, 0.12);
  --app-shadow: 0 20px 45px rgba(14, 116, 144, 0.08);
  --app-text: #0f172a;
  --app-accent: #0f766e;
}

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

body.app-shell {
  background: var(--app-bg);
  color: var(--app-text);
  background-attachment: fixed;
}

.app-header,
.app-footer {
  background: var(--app-surface);
  border-color: var(--app-border);
  box-shadow: var(--app-shadow);
}

.app-main {
  position: relative;
}

.app-main::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: 32px;
  background:
    radial-gradient(circle at top right, rgba(34, 211, 238, 0.14), transparent 28%),
    radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.1), transparent 26%);
}

.css-debug-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  padding: 0.7rem 1rem;
  border: 1px solid rgba(15, 118, 110, 0.25);
  border-radius: 999px;
  background: rgba(240, 253, 250, 0.92);
  color: var(--app-accent);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  box-shadow: 0 10px 30px rgba(15, 118, 110, 0.08);
}

.css-debug-chip::before {
  content: "";
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  background: #14b8a6;
  box-shadow: 0 0 0 6px rgba(20, 184, 166, 0.15);
}

.toast-enter {
  animation: toastIn 0.25s ease-out;
}

@keyframes toastIn {
  from {
    transform: translateY(-8px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}