:root {
  color-scheme: dark;
  --bg: #0b0c0e;
  --panel: #15171b;
  --panel-2: #1b1e23;
  --line: #30343b;
  --line-strong: #454b55;
  --text: #f4f6f8;
  --muted: #9ba3ad;
  --accent: #b7ff63;
  --accent-ink: #10150a;
  --error: #ff9a8f;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
}

button, input, select { font: inherit; }
button { touch-action: manipulation; }

.shell {
  width: min(100% - 28px, 720px);
  margin: 0 auto;
  padding: 32px 0 18px;
}

.topline {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.brand {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .22em;
}

.local-badge {
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 3px 7px;
  font-size: 10px;
}

.result-card {
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  background: #101215;
  padding: 22px;
  box-shadow: 0 18px 60px rgba(0, 0, 0, .3);
}

.result {
  display: block;
  min-height: 70px;
  color: var(--accent);
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: clamp(22px, 5vw, 34px);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: .02em;
  overflow-wrap: anywhere;
  user-select: all;
}

.result-bottom {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
}

.result-meta {
  min-height: 18px;
  color: var(--muted);
  font-size: 12px;
}

.actions { display: flex; gap: 8px; }
.button {
  min-height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  padding: 0 16px;
  color: var(--text);
  background: var(--panel-2);
  cursor: pointer;
}
.button:hover { border-color: #686f7c; }
.button:focus-visible, input:focus-visible, select:focus-visible, .mode:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.button-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 800;
}
.button:disabled { cursor: not-allowed; opacity: .45; }

.mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin: 14px 0;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--panel);
}

.mode {
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  color: var(--muted);
  background: transparent;
  cursor: pointer;
  font-weight: 700;
}
.mode.active { color: var(--text); background: #292d34; }

.panel {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  padding: 18px;
}

.field-grid {
  display: grid;
  gap: 12px;
  margin-bottom: 14px;
}
.field-grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.field-grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.field {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}
.field.wide { margin-top: 14px; }

input[type="number"], input[type="text"], select {
  width: 100%;
  min-height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: 9px;
  background: #0f1114;
  color: var(--text);
  padding: 9px 11px;
}
input.readonly { color: var(--muted); background: #191b1f; }
.mono { font-family: "SFMono-Regular", Consolas, monospace; }

.count-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
}
.count-row {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 12px;
}
.count-row input { text-align: center; }

.option-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.option {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 7px 10px;
  color: var(--muted);
  cursor: pointer;
  font-size: 12px;
}
.option:has(input:checked) { color: var(--text); border-color: #657047; background: #20251b; }
.option input { accent-color: var(--accent); }
.option small { color: #6f7781; }

.error {
  min-height: 20px;
  margin: 10px 4px 0;
  color: var(--error);
  font-size: 12px;
}

footer {
  padding: 14px 4px 0;
  color: #5f6670;
  font-family: "SFMono-Regular", Consolas, monospace;
  font-size: 9px;
  text-align: right;
}

[hidden] { display: none !important; }

@media (max-width: 560px) {
  .shell { width: min(100% - 18px, 720px); padding-top: 18px; }
  .result-card { padding: 17px; border-radius: 13px; }
  .result { min-height: 82px; font-size: 24px; }
  .result-bottom { align-items: stretch; flex-direction: column; }
  .actions { display: grid; grid-template-columns: 1fr 1fr; }
  .panel { padding: 14px; }
  .field-grid.two, .field-grid.three { grid-template-columns: 1fr; }
  .count-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .option-list { display: grid; }
}