:root {
  --bg: #10151b;
  --panel: #171f28;
  --panel-2: #1b2530;
  --border: #2a3542;
  --text: #e8ecef;
  --text-dim: #8b98a6;
  --accent-old: #e2984a;
  --accent-new: #33c7a6;
  --neg: #ef6f5b;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 24px;
  background: var(--bg);
  color: var(--text);
  font-family: 'Work Sans', Arial, sans-serif;
}

.app {
  max-width: 1040px;
  margin: 0 auto;
}

h1 {
  font-size: 26px;
  margin-bottom: 8px;
}

h2 {
  font-size: 18px;
  margin: 0 0 12px 0;
  color: var(--text);
}

.popis {
  color: var(--text-dim);
  line-height: 1.5;
  max-width: 760px;
  margin-bottom: 24px;
}

.popis-mala {
  color: var(--text-dim);
  font-size: 13px;
  line-height: 1.5;
}

.layout {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  flex: 1 1 440px;
}

canvas {
  display: block;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 6px;
  max-width: 100%;
}

.stav {
  margin-top: 12px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 14px;
  color: var(--accent-new);
}

.ovladani {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 14px;
}

select {
  background: var(--panel-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 8px;
  font-family: inherit;
}

button {
  background: var(--accent-new);
  color: #10151b;
  border: none;
  border-radius: 8px;
  padding: 10px 16px;
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
}

button:hover {
  opacity: 0.9;
}

.btn-vedlejsi {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}