styles.css

* { box-sizing: border-box; }
:root {
  --bg: #0b1021;
  --panel: #111735;
  --panel-2: #0e1430;
  --text: #eef2ff;
  --subtle: #aeb7d6;
  --accent: #6aa7ff;
  --accent-2: #79ffe1;
  --danger: #ff6b6b;
}
html, body { height: 100%; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 800px at 70% -20%, #1a2448 0%, var(--bg) 60%);
}
.app-header {
  padding: 18px 24px;
  background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.0));
  border-bottom: 1px solid rgba(255,255,255,0.06);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 10;
}
.app-header h1 { margin: 0; font-size: 22px; letter-spacing: 0.3px; }
.subtitle { margin: 4px 0 0; color: var(--subtle); font-size: 13px; }

main {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 16px;
  padding: 16px;
  height: calc(100% - 84px);
}

.controls {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  padding: 14px 14px 8px;
  overflow: auto;
  box-shadow: 0 10px 30px rgba(0,0,0,0.25), inset 0 1px 0 rgba(255,255,255,0.05);
}
.control-row { margin: 10px 6px; display: grid; grid-template-columns: 1fr; gap: 8px; }
label { font-size: 13px; color: var(--subtle); display: flex; justify-content: space-between; }
input[type="range"] { width: 100%; }

.buttons { display: flex; gap: 8px; margin: 12px 6px 4px; }
button {
  appearance: none;
  border: 1px solid rgba(255,255,255,0.12);
  color: var(--text);
  background: #0d1531;
  padding: 8px 12px;
  border-radius: 10px;
  cursor: pointer;
  transition: transform .08s ease, background .2s ease, box-shadow .2s ease;
  box-shadow: 0 4px 14px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.06);
}
button:hover { background: #111b3d; }
button:active { transform: translateY(1px) scale(0.99); }
button.primary { background: linear-gradient(180deg, #27408b, #162456); border-color: rgba(122,170,255,0.35); }

#canvas {
  width: 100%; height: calc(100vh - 140px);
  background: radial-gradient(900px 600px at 15% -10%, rgba(122,170,255,0.12), transparent 60%),
              radial-gradient(1200px 900px at 80% 110%, rgba(121,255,225,0.08), transparent 60%),
              #070b1a;
  border-radius: 14px;
  border: 1px solid rgba(255,255,255,0.06);
  box-shadow: 0 20px 50px rgba(0,0,0,0.35), inset 0 1px 0 rgba(255,255,255,0.05);
}

.app-footer { padding: 10px 16px 18px; color: var(--subtle); font-size: 12px; }

@media (max-width: 980px) {
  main { grid-template-columns: 1fr; }
  #canvas { height: 60vh; }
}

/* Help modal styles */
dialog#helpModal::backdrop { background: rgba(0,0,0,0.45); backdrop-filter: blur(2px); }
dialog#helpModal {
  border: none;
  padding: 0;
  border-radius: 12px;
  max-width: min(900px, 92vw);
  width: 92vw;
  color: var(--text);
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: 0 30px 70px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.06);
}
dialog#helpModal > article { display: grid; grid-template-rows: auto 1fr; max-height: 80vh; }
dialog#helpModal header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; border-bottom: 1px solid rgba(255,255,255,0.07); }
dialog#helpModal header strong { font-size: 16px; }
dialog#helpModal header button { background: transparent; color: var(--text); border: 1px solid rgba(255,255,255,0.14); border-radius: 8px; padding: 2px 8px; cursor: pointer; }
.help-content { padding: 12px 14px; overflow: auto; }
.help-content h1, .help-content h2, .help-content h3 { margin: 12px 0 6px; }
.help-content p, .help-content li { color: var(--subtle); line-height: 1.6; }

/* Code blocks with copy button */
.help-content pre { 
  background: #0c1330; 
  border: 1px solid rgba(255,255,255,0.06); 
  padding: 10px; 
  border-radius: 8px; 
  overflow: auto; 
  position: relative;
  margin: 12px 0;
}
.help-content pre:hover .copy-btn { opacity: 1; }
.copy-btn {
  position: absolute;
  top: 8px;
  right: 8px;
  background: rgba(106,167,255,0.9);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  padding: 4px 8px;
  font-size: 11px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s ease, background 0.2s ease;
  font-family: inherit;
}
.copy-btn:hover { background: rgba(106,167,255,1); }
.copy-btn.copied { background: rgba(121,255,225,0.9); }

.help-content code { color: #a1b8ff; background: rgba(161,184,255,0.1); padding: 2px 4px; border-radius: 3px; }
.help-content pre code { background: transparent; padding: 0; }

/* Table styles */
.help-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 12px 0;
  background: rgba(255,255,255,0.02);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 8px;
  overflow: hidden;
}
.help-content th,
.help-content td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.help-content th {
  background: rgba(106,167,255,0.15);
  color: var(--text);
  font-weight: 600;
  font-size: 13px;
}
.help-content td {
  color: var(--subtle);
  font-size: 13px;
}
.help-content tr:last-child td { border-bottom: none; }
.help-content tr:hover { background: rgba(255,255,255,0.03); }

/* Lists */
.help-content ul, .help-content ol { padding-left: 20px; }
.help-content li { margin: 4px 0; }

/* Blockquotes */
.help-content blockquote {
  margin: 12px 0;
  padding: 8px 12px;
  border-left: 3px solid var(--accent);
  background: rgba(106,167,255,0.08);
  border-radius: 0 6px 6px 0;
}
.help-content blockquote p { margin: 0; }