:root {
  color-scheme: dark;
  --page: #18191b;
  --panel: #242527;
  --field: #303134;
  --line: #414348;
  --text: #eeeef0;
  --muted: #b1b3bb;
  --blue: #78adff;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.5;
  color: var(--text);
  background: var(--page);
}
*, *::before, *::after { box-sizing: border-box; }
body {
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  padding: 32px 24px;
  display: grid;
  place-items: center;
}
.panel {
  width: min(100%, 448px);
  padding: 30px;
  background: var(--panel);
  border: 1px solid #323336;
  border-radius: 18px;
  box-shadow: 0 12px 40px #00000020;
}
.secret-label { display: block; margin-bottom: 10px; font-size: 14px; font-weight: 500; }
.secret {
  display: block;
  width: 100%;
  min-width: 0;
  height: 50px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: var(--field);
  color: var(--text);
  font: 400 16px ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: .3px;
  caret-color: var(--blue);
  appearance: none;
}
.secret::placeholder { color: #9b9da5; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; letter-spacing: 0; }
.secret[aria-invalid="true"] { border-color: #ed9999; }
:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; }
.error { margin: 10px 0 0; color: #f3a5a5; font-size: 13px; overflow-wrap: anywhere; }
.error[hidden] { display: none; }
.code-area { padding: 32px 0 28px; text-align: center; }
.countdown { min-height: 20px; color: var(--muted); font-size: 13px; }
.code {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin: 8px 0 13px;
  color: var(--blue);
  font: 500 52px/1.3 ui-monospace, SFMono-Regular, Consolas, monospace;
  letter-spacing: 1px;
  font-variant-numeric: tabular-nums;
  user-select: all;
}
.code.is-empty { color: #858893; }
.timer {
  display: block;
  width: 150px;
  height: 3px;
  margin: 0 auto 19px;
  border: none;
  border-radius: 2px;
  overflow: hidden;
  background: #3a3c41;
  color: var(--blue);
  accent-color: var(--blue);
  appearance: none;
}
.timer::-webkit-progress-bar { background: #3a3c41; border-radius: 2px; }
.timer::-webkit-progress-value { background: var(--blue); border-radius: 2px; }
.timer::-moz-progress-bar { background: var(--blue); border-radius: 2px; }
.next { color: var(--muted); font-size: 14px; }
.next-value { margin-left: 6px; color: #d6d7dc; font-family: ui-monospace, SFMono-Regular, Consolas, monospace; font-variant-numeric: tabular-nums; }
.actions { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.action {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: 9px;
  background: transparent;
  color: #e1e2e6;
  font: 500 14px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  white-space: nowrap;
  cursor: pointer;
  transition: background-color .15s;
}
.action svg { width: 15px; height: 15px; flex: 0 0 15px; }
.primary { border-color: transparent; background: var(--blue); color: #13233b; }
.primary:hover:not(:disabled) { background: #8dbaff; }
.secondary:hover:not(:disabled) { background: #303236; }
.action:active:not(:disabled) { transform: translateY(1px); }
.action:disabled { opacity: .45; cursor: default; }
.clipboard-helper { position: fixed; left: -9999px; top: 0; font-size: 16px; }
@media (max-width: 420px) {
  body { padding: 24px 14px; }
  .panel { padding: 24px 20px; border-radius: 15px; }
  .code { font-size: 44px; gap: 10px; }
  .actions { gap: 10px; }
}
@media (prefers-reduced-motion: reduce) { .action { transition: none; } }