:root {
  color-scheme: light dark;
  --paper: #f6f4ef;
  --ink: #1d2430;
  --soft: #55606f;
  --accent: #0f6b5c;
  --on-accent: #fff;
  --line: #c9c6bd;
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #15181d;
    --ink: #eef0f2;
    --soft: #a7b0bb;
    --accent: #4cc2a8;
    --on-accent: #0c1512;
    --line: #424a55;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100dvh;
  display: grid;
  background: var(--paper);
  color: var(--ink);
  font: 18px/1.5 system-ui, sans-serif;
}

main {
  width: 100%;
  max-width: 26rem;
  margin-inline: auto;
  padding: 32px 24px max(32px, env(safe-area-inset-bottom));
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 100%;
}

@media (min-height: 640px) and (min-width: 600px) {
  main { justify-content: center; }
}

h1 { font-size: 2rem; line-height: 1.15; margin: 0 0 12px; }
p { margin: 0; color: var(--soft); }

.actions { display: grid; gap: 12px; margin-top: 32px; }
.actions:empty { display: none; }
.status { min-height: 3em; margin-top: 16px; color: var(--ink); }
.status:empty { visibility: hidden; }

.button {
  display: block;
  width: 100%;
  min-height: 56px;
  padding: 14px 20px;
  border: 1px solid transparent;
  border-radius: 12px;
  background: var(--accent);
  color: var(--on-accent);
  font: inherit;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  cursor: pointer;
  transition: transform 90ms ease-out, opacity 120ms;
}

main > a.button { margin-top: 32px; }
.button:active { transform: scale(0.98); }
.button:disabled { opacity: 0.65; cursor: progress; }
.button:focus-visible { outline: 3px solid var(--ink); outline-offset: 2px; }
.button.quiet { background: transparent; border-color: var(--line); color: var(--ink); }

@media (prefers-reduced-motion: reduce) {
  .button { transition: none; }
}