:root {
  color-scheme: dark;
  --bg: #12110f;
  --panel: #1c1a17;
  --ink: #f3efe7;
  --muted: #b4aa99;
  --line: #3a342c;
  --accent: #ff4500;
  --ok: #9ad07a;
  --bad: #f0a0a0;
  --mono: "SFMono-Regular", ui-monospace, Menlo, Consolas, monospace;
  --sans: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 17px/1.45 var(--sans);
}

.wrap {
  max-width: 52rem;
  margin: 0 auto;
  padding: 2.25rem 1.25rem 4rem;
}

.hero h1 {
  margin: 0 0 0.35rem;
  font-size: 2.1rem;
  letter-spacing: -0.03em;
}

.hero p, .hint, footer, .status, .stats {
  color: var(--muted);
}

.tabs {
  display: flex;
  gap: 0.4rem;
  margin: 1.2rem 0 0.2rem;
  border-bottom: 1px solid var(--line);
}

.tab {
  border: 1px solid var(--line);
  border-bottom: none;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--muted);
  padding: 0.5rem 0.9rem;
  cursor: pointer;
  font: 15px/1.2 var(--sans);
}

.tab.active {
  background: var(--panel);
  color: var(--ink);
  font-weight: 650;
}

.field-row {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  align-items: flex-end;
}

.field.grow { flex: 1 1 16rem; }
.field.narrow { flex: 0 0 12rem; }

.presets {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  margin: 0.9rem 0 0.2rem;
}

.presets-label { color: var(--muted); font-size: 0.9rem; margin-right: 0.2rem; }

.chip {
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 999px;
  padding: 0.35rem 0.75rem;
  font: 13px/1.2 var(--sans);
  cursor: pointer;
}

.chip:hover { border-color: var(--accent); }

.progress {
  height: 6px;
  border-radius: 999px;
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
  margin: 0.6rem 0 0.2rem;
}

.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.2s ease;
}

.progress-bar.indeterminate {
  width: 35%;
  animation: slide 1.1s ease-in-out infinite;
}

@keyframes slide {
  0% { margin-left: -35%; }
  100% { margin-left: 100%; }
}

.field {
  display: grid;
  gap: 0.4rem;
  margin: 1.4rem 0 1rem;
}

.field span { font-size: 0.92rem; }

input[type="url"], input[type="number"], textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  padding: 0.7rem 0.8rem;
  font: 15px/1.4 var(--mono);
}

.num-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9.5rem, 1fr));
  gap: 0.65rem;
}

.num-grid label {
  display: grid;
  gap: 0.3rem;
  color: var(--muted);
  font-size: 0.92rem;
}

.num-grid input { padding: 0.45rem 0.55rem; }

textarea { resize: vertical; }

.opts {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.7rem 0.9rem;
  margin: 0.8rem 0;
  background: var(--panel);
}

.opts summary { cursor: pointer; }

.opt-grid {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.75rem;
}

fieldset {
  border: 1px solid var(--line);
  border-radius: 6px;
  margin: 0;
  padding: 0.5rem 0.7rem 0.65rem;
}

legend { color: var(--muted); padding: 0 0.3rem; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1rem 0;
}

button, .btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  border-radius: 8px;
  padding: 0.55rem 0.9rem;
  font: 15px/1.2 var(--sans);
  text-decoration: none;
  cursor: pointer;
}

button.primary {
  background: var(--accent);
  border-color: #d63a00;
  color: #fff;
  font-weight: 650;
}

button:disabled, .btn[aria-disabled="true"] {
  opacity: 0.45;
  pointer-events: none;
}

.status { min-height: 1.4em; margin: 0.2rem 0; }
.status.ok { color: var(--ok); }
.status.bad { color: var(--bad); }

.stats { margin: 0 0 1rem; font-size: 0.95rem; }

#outputBlock h2 { margin-bottom: 0.4rem; }

pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1rem;
  font: 13px/1.45 var(--mono);
  max-height: 70vh;
  overflow: auto;
}

footer {
  margin-top: 2.5rem;
  font-size: 0.9rem;
}

a { color: #ffb087; }