:root {
  --ink: #1f1d1a;
  --muted: #6c675f;
  --line: #dfddd6;
  --accent: #2f46c8;
  --danger: #b3261e;
  --paper: #f7f7f5;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
}

body:has(dialog[open]) {
  overflow: hidden;
}

.page {
  max-width: 560px;
  margin: 0 auto;
  padding: 2rem 1.25rem;
}

.page h1 {
  margin: 0 0 0.5rem;
  font-size: 1.4rem;
}

.btn {
  padding: 0.55rem 1rem;
  font: inherit;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  cursor: pointer;
}

.btn--danger {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
}

.btn:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.result {
  min-height: 1.5rem;
  color: var(--muted);
}

dialog {
  width: min(92vw, 420px);
  padding: 0;
  color: var(--ink);
  background: #fff;
  border: 0;
  border-radius: 14px;
  box-shadow: 0 24px 60px rgba(15, 18, 24, 0.35);
}

dialog::backdrop {
  background: rgba(15, 18, 24, 0.55);
}

.dialog__form {
  padding: 1.5rem;
}

.dialog__form h2 {
  margin: 0 0 0.5rem;
  font-size: 1.2rem;
}

.dialog__form p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.6rem;
}