:root {
  color-scheme: dark;
  --bg: #0a0d12;
  --panel: rgba(17, 24, 39, 0.84);
  --panel-border: rgba(148, 163, 184, 0.16);
  --text: #e5eefb;
  --muted: #94a3b8;
  --accent: #7c3aed;
  --accent-soft: rgba(124, 58, 237, 0.18);
  --good: #22c55e;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  font-family: "Inter", system-ui, sans-serif;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(124, 58, 237, 0.25), transparent 30%),
    radial-gradient(circle at top right, rgba(14, 165, 233, 0.18), transparent 24%),
    var(--bg);
}
button, input, textarea { font: inherit; }
pre {
  margin: 0;
  white-space: pre-wrap;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.55;
}

.app-shell {
  width: min(1480px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 40px;
}
.surface {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  box-shadow: var(--shadow);
  border-radius: 24px;
  backdrop-filter: blur(20px);
}
.hero-panel {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 28px;
  margin-bottom: 20px;
}
.eyebrow, .section-kicker, .result-rank, .stat-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-size: 0.75rem;
}
h1, h2, h3, p { margin: 0; }
h1 { font-size: clamp(2rem, 3vw, 3.4rem); margin-bottom: 12px; }
.lede { max-width: 760px; color: #c5d3eb; line-height: 1.6; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(130px, 1fr));
  gap: 12px;
  align-self: start;
}
.stat-card {
  padding: 18px;
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.74);
  border: 1px solid rgba(148, 163, 184, 0.14);
}
.stat-card strong { display: block; margin-top: 8px; font-size: 1.2rem; }
.stat-card.accent { background: var(--accent-soft); }
.workspace-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 20px;
  margin-bottom: 20px;
}
.control-panel, .strategy-panel, .output-panel { padding: 24px; }
.section-header, .output-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}
.field-group,
#provider-select,
.prompt-editor,
.summary-card,
.result-card,
.strategy-card {
  border-radius: 18px;
  border: 1px solid rgba(148, 163, 184, 0.14);
  background: rgba(15, 23, 42, 0.72);
}
.field-group {
  display: block;
  padding: 14px;
}
.field-group label,
.textarea-label,
.select-label { display: block; margin-bottom: 10px; color: #c5d3eb; font-weight: 600; }
.field-group input,
.prompt-editor {
  width: 100%;
  color: var(--text);
  background: transparent;
  border: none;
  outline: none;
}
.field-group p { margin-top: 8px; color: var(--muted); font-size: 0.88rem; }
.prompt-editor {
  min-height: 270px;
  resize: vertical;
  padding: 16px;
  line-height: 1.6;
  margin-bottom: 18px;
}
.config-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
#provider-select { display: block; padding: 14px; }
#provider-select [data-part="trigger"] {
  width: 100%;
  text-align: left;
  background: transparent;
  color: var(--text);
  border: none;
  padding: 0;
}
#provider-select [data-part="listbox"] {
  width: min(320px, 90vw);
  padding: 8px;
  color: var(--text);
  background: #0f172a;
  border: 1px solid rgba(148, 163, 184, 0.22);
  border-radius: 16px;
}
petty-select-option {
  display: block;
  cursor: pointer;
  padding: 10px 12px;
  border-radius: 12px;
}
petty-select-option[data-highlighted],
petty-select-option[aria-selected="true"] { background: rgba(124, 58, 237, 0.22); }
.actions-row, .toolbar {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 18px;
}
petty-button button {
  cursor: pointer;
  border: none;
  color: white;
  border-radius: 14px;
  padding: 12px 18px;
  background: linear-gradient(135deg, #8b5cf6, #6d28d9);
}
#sample-btn button, #copy-best-btn button {
  color: var(--text);
  background: rgba(148, 163, 184, 0.14);
}
.strategy-list, .results-grid, .summary-strip {
  display: grid;
  gap: 14px;
}
.strategy-card {
  display: grid;
  grid-template-columns: 18px 1fr;
  gap: 14px;
  padding: 16px;
  cursor: pointer;
}
.strategy-card.is-selected { border-color: rgba(124, 58, 237, 0.7); box-shadow: inset 0 0 0 1px rgba(124, 58, 237, 0.4); }
.strategy-card input { margin-top: 2px; }
.strategy-title-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 8px;
}
.strategy-card p { color: #d9e3f4; margin-bottom: 8px; line-height: 1.5; }
.strategy-card small { color: var(--muted); line-height: 1.5; }
.summary-strip {
  grid-template-columns: 1.1fr 1fr;
  margin-bottom: 18px;
}
.summary-card {
  padding: 16px;
}
.summary-card span { display: block; margin-bottom: 10px; color: var(--muted); font-size: 0.82rem; }
.summary-card ul { margin: 0; padding-left: 18px; color: #dce8fb; }
.results-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.result-card {
  padding: 18px;
}
.best-variant { border-color: rgba(34, 197, 94, 0.52); }
.result-header, .result-meta {
  display: flex;
  justify-content: space-between;
  gap: 12px;
}
.result-header { margin-bottom: 12px; }
.result-meta {
  margin-bottom: 14px;
  color: var(--muted);
  font-size: 0.88rem;
}
.score-pill {
  min-width: 74px;
  text-align: center;
  padding: 10px 12px;
  border-radius: 999px;
  background: rgba(34, 197, 94, 0.16);
  color: #bbf7d0;
  font-weight: 700;
}
.result-why {
  margin-bottom: 14px;
  color: #c5d3eb;
  line-height: 1.55;
}
petty-badge {
  display: inline-flex;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.12);
}
@media (max-width: 1100px) {
  .workspace-grid, .summary-strip, .results-grid, .hero-panel { grid-template-columns: 1fr; display: grid; }
}