/* Telegram injects --tg-theme-* variables; the fallbacks keep the page usable in a plain browser. */
:root {
  --bg: var(--tg-theme-secondary-bg-color, #f1f1f4);
  --card: var(--tg-theme-section-bg-color, var(--tg-theme-bg-color, #ffffff));
  --text: var(--tg-theme-text-color, #111111);
  --hint: var(--tg-theme-hint-color, #707579);
  --accent: var(--tg-theme-button-color, #2481cc);
  --accent-text: var(--tg-theme-button-text-color, #ffffff);
  --link: var(--tg-theme-link-color, #2481cc);
  --danger: var(--tg-theme-destructive-text-color, #d14e4e);
  --line: color-mix(in srgb, var(--hint) 25%, transparent);
  --radius: 12px;
  --gap: 12px;
  color-scheme: light dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.4 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  display: grid;
  gap: var(--gap);
  max-width: 560px;
  margin: 0 auto;
  padding: 16px 16px calc(24px + env(safe-area-inset-bottom));
}

.card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 14px 16px;
}

h2 {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--hint);
}

.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
}
.row h2 { margin: 0; }

.caption { margin: 0; font-weight: 600; }

.segmented {
  display: flex;
  gap: 4px;
  padding: 3px;
  border-radius: 10px;
  background: var(--line);
}
.segmented button {
  flex: 1;
  min-height: 36px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font: inherit;
  cursor: pointer;
}
.segmented button[aria-pressed="true"] {
  background: var(--card);
  font-weight: 600;
  box-shadow: 0 1px 3px rgb(0 0 0 / 0.12);
}
.segmented button:disabled { opacity: 0.45; cursor: default; }

.weight {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 2px 8px;
  margin-bottom: 10px;
}
.weight output { font-variant-numeric: tabular-nums; color: var(--hint); }
.weight input[type="range"] {
  grid-column: 1 / -1;
  width: 100%;
  min-height: 32px;
  accent-color: var(--accent);
}

.hint {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--hint);
}

#seed {
  flex: 1;
  min-width: 0;
  min-height: 40px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: transparent;
  color: var(--text);
  font: inherit;
  font-variant-numeric: tabular-nums;
}

button {
  font: inherit;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--card);
  color: var(--text);
  cursor: pointer;
}
button:disabled { opacity: 0.5; cursor: default; }
button:focus-visible, input:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
button.link {
  min-height: 32px;
  border: 0;
  padding: 0;
  background: none;
  color: var(--link);
}
button.primary {
  border: 0;
  background: var(--accent);
  color: var(--accent-text);
  font-weight: 600;
}


.actions {
  display: grid;
  gap: 8px;
}
.actions button { min-height: 46px; }

.status {
  min-height: 1.4em;
  margin: 0;
  text-align: center;
  color: var(--hint);
}
.notice {
  margin: 24px 0;
  text-align: center;
  color: var(--danger);
}


[hidden] { display: none !important; }