:root {
  --bg: #0b1020;
  --panel: #121932;
  --panel-2: #1a2344;
  --line: rgba(255, 255, 255, 0.10);
  --line-2: rgba(255, 255, 255, 0.18);
  --text: #eef2ff;
  --muted: #94a3b8;
  --accent: #60a5fa;
  --accent-strong: #3b82f6;
  --green: #34d399;
  --amber: #fbbf24;
  --red: #f87171;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: radial-gradient(1200px 600px at 20% -10%, rgba(96, 165, 250, 0.12), transparent),
              radial-gradient(900px 500px at 100% 0%, rgba(167, 139, 250, 0.10), transparent),
              var(--bg);
  color: var(--text);
  min-height: 100vh;
}

h1, h2, h3 { margin: 0; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 28px;
  border-bottom: 1px solid var(--line);
}

.brand { display: flex; align-items: center; gap: 14px; }
.logo { font-size: 28px; }
.brand h1 { font-size: 22px; letter-spacing: 0.2px; }
.tag { margin: 2px 0 0; color: var(--muted); font-size: 13px; }

.badges { display: flex; gap: 8px; }
.badge {
  font-size: 12px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: var(--panel);
  color: var(--text);
}

main {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 20px;
  padding: 20px 28px;
}

.control-panel, .canvas-panel, .log-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}

.control-panel h2 {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  color: var(--muted);
  margin: 18px 0 8px;
}
.control-panel h2:first-child { margin-top: 0; }

.big-select {
  width: 100%;
  font-size: 14px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: var(--panel-2);
  color: var(--text);
}

.policy-pick { display: flex; flex-direction: column; gap: 8px; }
.policy-card {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px;
  border: 1px solid var(--line-2);
  border-radius: 12px;
  background: var(--panel-2);
  cursor: pointer;
  transition: border-color 120ms ease, background 120ms ease;
}
.policy-card:hover { border-color: var(--accent); }
.policy-card input { margin-top: 4px; }
.policy-card div { display: flex; flex-direction: column; }
.policy-card strong { font-size: 14px; }
.policy-card span { color: var(--muted); font-size: 12px; line-height: 1.4; }

.actions { display: flex; flex-wrap: wrap; gap: 8px; }
button {
  font-size: 14px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--line-2);
  background: var(--panel-2);
  color: var(--text);
  cursor: pointer;
  transition: transform 80ms ease, background 120ms ease, border-color 120ms ease;
}
button:hover { border-color: var(--accent); }
button:active { transform: translateY(1px); }
button.primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border-color: transparent;
  font-weight: 600;
  flex: 1;
  min-width: 160px;
}
button.ghost { background: transparent; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

.status {
  margin-top: 14px;
  font-size: 13px;
  padding: 10px 12px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px dashed var(--line-2);
  min-height: 38px;
}
.status.running { border-style: solid; border-color: var(--accent); color: var(--accent); }
.status.success { border-style: solid; border-color: var(--green); color: var(--green); }
.status.error   { border-style: solid; border-color: var(--red); color: var(--red); }
.muted { color: var(--muted); }

.scroll-pointer {
  margin-top: 18px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--muted);
  background: transparent;
  border: 1px dashed var(--line-2);
  border-radius: 12px;
  cursor: pointer;
  transition: color 120ms ease, border-color 120ms ease, background 120ms ease;
}
.scroll-pointer:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: rgba(96, 165, 250, 0.06);
}
.scroll-pointer-text { letter-spacing: 0.3px; }
.scroll-pointer-arrow {
  font-size: 16px;
  display: inline-block;
  animation: scroll-bounce 1.6s ease-in-out infinite;
}
@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); opacity: 0.85; }
  50%      { transform: translateY(4px); opacity: 1; }
}
@media (prefers-reduced-motion: reduce) {
  .scroll-pointer-arrow { animation: none; }
}

.canvas-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.canvas-wrap {
  background: #f8fafc;
  border-radius: 14px;
  padding: 8px;
  display: flex;
  justify-content: center;
}
#canvas {
  width: 100%;
  max-height: 64vh;
  background: #f8fafc;
  border-radius: 10px;
}

.scoreboard {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 10px;
}
.score-card {
  background: var(--panel-2);
  border: 1px solid var(--line-2);
  border-radius: 14px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.score-card .label {
  font-size: 11px;
  letter-spacing: 0.6px;
  text-transform: uppercase;
  color: var(--muted);
}
.score-card strong {
  font-size: 22px;
  font-feature-settings: "tnum";
}
.score-card.primary-score {
  background: linear-gradient(135deg, rgba(96, 165, 250, 0.18), rgba(59, 130, 246, 0.05));
  border-color: rgba(96, 165, 250, 0.35);
}
.score-card.primary-score strong { color: var(--accent); }

.log-panel {
  margin: 0 28px 28px;
}
.log-panel details { margin-bottom: 10px; }
.log-panel summary {
  cursor: pointer;
  padding: 10px 4px;
  font-size: 14px;
  color: var(--text);
}
.log-panel summary:hover { color: var(--accent); }

#log-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin-top: 8px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
#log-table th, #log-table td {
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
}
#log-table th { color: var(--muted); font-weight: 500; font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
#log-table td.delta-pos { color: var(--green); }
#log-table td.delta-neg { color: var(--red); }
#log-table tr.error-row td { color: var(--amber); }

pre.raw {
  white-space: pre-wrap;
  word-break: break-word;
  background: var(--panel-2);
  border-radius: 10px;
  padding: 12px;
  font-size: 12px;
  color: #cbd5e1;
  max-height: 360px;
  overflow: auto;
}

footer {
  text-align: center;
  padding: 22px;
  color: var(--muted);
  font-size: 12px;
}
footer a { color: var(--muted); margin: 0 4px; }
footer a:hover { color: var(--accent); }

@media (max-width: 900px) {
  main { grid-template-columns: 1fr; }
  .scoreboard { grid-template-columns: repeat(2, 1fr); }
}