:root {
  color-scheme: dark;
  --app-background: #141824;
  --app-secondary: #20283b;
  --app-text: #eef1fa;
  --app-muted: #b4bed4;
  --app-accent: #baa0ff;
  --app-button-text: #171329;
  --app-border: #46516b;
  --app-scrollbar: #7c6ba7;
}
:root[data-theme="light"] {
  color-scheme: light;
  --app-background: #f3f4fa;
  --app-secondary: #ffffff;
  --app-text: #20243a;
  --app-muted: #565f78;
  --app-accent: #6641b2;
  --app-button-text: #ffffff;
  --app-border: #c8cede;
  --app-scrollbar: #8975b3;
}
* { box-sizing: border-box; scrollbar-width: thin; scrollbar-color: var(--app-scrollbar) var(--app-background); }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--app-background); }
*::-webkit-scrollbar-thumb { background: var(--app-scrollbar); border: 2px solid var(--app-background); border-radius: 10px; }
html { min-width: 240px; background: var(--app-background); }
body { margin: 0; font: 16px/1.65 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--app-text); background: var(--app-background); overflow-wrap: anywhere; }
[hidden] { display: none !important; }
.shell { width: min(100%, 920px); margin: 0 auto; padding: 28px 20px 48px; }
.hero { padding: 12px 0 20px; }
.eyebrow { color: var(--app-accent); font-weight: 700; font-size: 0.8rem; letter-spacing: 0.08em; text-transform: uppercase; }
h1 { font-size: clamp(1.8rem, 6vw, 3rem); line-height: 1.15; margin: 16px 0; letter-spacing: -0.04em; }
h2 { font-size: 1.25rem; line-height: 1.35; margin: 0 0 16px; }
p { margin: 12px 0; }
.lead { max-width: 68ch; color: var(--app-muted); }
a { color: var(--app-accent); text-underline-offset: 4px; }
nav { display: flex; gap: 12px 24px; flex-wrap: wrap; margin-top: 24px; }
nav a { border-radius: 8px; padding: 6px 0; }
nav [aria-current="page"] { color: var(--app-text); font-weight: 700; text-decoration: none; }
.panel { background: var(--app-secondary); border: 1px solid var(--app-border); border-radius: 18px; padding: 24px; margin: 18px 0; }
.status-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; margin: 0 0 24px; }
dt { font-size: 0.85rem; color: var(--app-muted); }
dd { margin: 3px 0 0; font-weight: 650; }
.notice { border-left: 3px solid var(--app-accent); padding: 4px 0 4px 16px; font-size: 0.9rem; color: var(--app-muted); }
.live-status { min-height: 1.65em; color: var(--app-accent); font-weight: 600; }
.actions, .counter { display: flex; align-items: center; flex-wrap: wrap; gap: 10px; }
button, .button-link { border: 1px solid transparent; background: var(--app-accent); color: var(--app-button-text); border-radius: 10px; padding: 10px 16px; min-height: 44px; font-family: inherit; font-size: 0.95rem; font-weight: 600; line-height: 1.4; cursor: pointer; text-decoration: none; }
button { font-family: inherit; font-size: 0.95rem; font-weight: 600; line-height: 1.4; }
button:hover:not(:disabled), .button-link:hover { filter: brightness(1.12); }
button.secondary { color: var(--app-text); background: transparent; border-color: var(--app-border); }
button:disabled { cursor: not-allowed; opacity: 0.45; }
button:focus-visible, a:focus-visible { outline: 3px solid var(--app-accent); outline-offset: 4px; }
.counter output { min-width: 2.5ch; font-size: 2rem; font-variant-numeric: tabular-nums; font-weight: 700; margin-right: 12px; }
.muted { color: var(--app-muted); font-size: 0.9rem; }
.checklist { padding-left: 22px; }
.checklist li { padding-left: 6px; margin: 20px 0; }
.scroll-sample p { margin: 24px 0; }
.footer { padding: 24px 0; text-align: center; color: var(--app-muted); }
.button-link { display: inline-block; margin-top: 10px; }
code { font-size: 0.92em; }
@media (max-width: 480px) {
  .shell { padding: 18px 12px 36px; }
  .panel { padding: 18px 16px; border-radius: 14px; }
  .status-grid { grid-template-columns: 1fr; gap: 12px; }
  .actions button { flex: 1 1 42%; }
}