:root {
  --bg: #0b0f16;
  --panel: #111827;
  --ink: #e8edf7;
  --muted: #97a4c0;
  --accent: #36d6ae;
  --accent-2: #ffb454;
  --border: #1e293b;
  --code: #0f172a;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(54, 214, 174, 0.08), transparent 35%),
              radial-gradient(circle at 80% 0%, rgba(255, 180, 84, 0.12), transparent 32%),
              var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

.page {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 60px;
}

.hero {
  margin-bottom: 24px;
}

.eyebrow {
  display: inline-block;
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-2);
  margin: 0 0 6px;
}

h1 {
  margin: 0 0 8px;
  font-size: 2.1rem;
  letter-spacing: -0.01em;
}

.lede {
  margin: 0 0 14px;
  color: var(--muted);
}

.inline-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.inline-facts span {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  padding: 6px 10px;
  border-radius: 8px;
  font-size: 0.9rem;
}

.alert {
  background: rgba(255, 180, 84, 0.1);
  border: 1px solid rgba(255, 180, 84, 0.5);
  color: var(--ink);
  border-radius: 10px;
  padding: 10px 12px;
  margin: 0 0 12px;
  font-size: 0.95rem;
  line-height: 1.4;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 24px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  margin-bottom: 24px;
}

.step-title {
  color: var(--accent);
  font-size: 1.25rem;
  margin: 0 0 20px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  padding-bottom: 12px;
}

.advanced-settings {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px dashed var(--border);
}

.advanced-settings summary {
  color: var(--accent-2);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 500;
  user-select: none;
}

.advanced-settings summary:hover {
  text-decoration: underline;
}

.mt-4 { margin-top: 1rem; }

.primary-btn {
  background: linear-gradient(135deg, var(--accent), #2563eb);
  color: white;
  width: 100%;
}

.fieldset {
  margin-bottom: 16px;
}

.fieldset-title {
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-bottom: 10px;
}

label {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
}

.toggle-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.toggle-group {
  display: flex;
  gap: 14px;
  align-items: center;
  flex-wrap: wrap;
  color: var(--ink);
}

.toggle-group input {
  width: auto;
}

input,
select {
  margin-top: 6px;
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--code);
  color: var(--ink);
  font-size: 1rem;
}

input:focus,
select:focus {
  outline: 2px solid var(--accent);
  border-color: transparent;
}

.grid {
  display: grid;
  gap: 14px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid.three {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.hint {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.big-actions {
  flex-direction: column;
}

.big-actions button {
  width: 100%;
  justify-content: center;
}

@media (min-width: 600px) {
  .big-actions {
    flex-direction: row;
  }
}

button {
  appearance: none;
  border: none;
  border-radius: 12px;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  color: #061220;
  background: linear-gradient(120deg, var(--accent), #5df5c6);
  transition: transform 0.12s ease, box-shadow 0.12s ease, background 0.2s ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 30px rgba(54, 214, 174, 0.25);
}

button.ghost {
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
  border: 1px solid var(--border);
  box-shadow: none;
}

button.ghost:hover {
  border-color: var(--accent);
  color: #0ef7c4;
}

.output pre,
pre#output {
  background: var(--code);
  border-radius: 12px;
  padding: 16px;
  border: 1px solid var(--border);
  min-height: 220px;
  white-space: pre-wrap;
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.95rem;
  color: var(--ink);
}

@media (max-width: 640px) {
  .page { padding: 20px 14px 40px; }
  h1 { font-size: 1.8rem; }
  .inline-facts span { width: 100%; }
}