:root {
  color-scheme: dark;
  --bg: #111315;
  --surface: #181d20;
  --surface-2: #20272b;
  --line: #354047;
  --text: #eef4f2;
  --muted: #9fb0ab;
  --accent: #37d3a0;
  --accent-2: #f3c55b;
  --danger: #ff6d7a;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
}

button,
select,
input {
  font: inherit;
}

.site-demo-menu {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  padding: 12px 18px;
  border-bottom: 1px solid var(--line);
  background: rgba(17, 19, 21, 0.94);
  backdrop-filter: blur(10px);
}

.site-demo-menu a {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  text-decoration: none;
  text-transform: uppercase;
}

.site-demo-menu a:hover {
  color: var(--accent);
}

.app-shell {
  width: min(1500px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 32px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.topbar-actions {
  display: flex;
  gap: 10px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.demo-badge {
  display: inline-flex;
  align-items: center;
  width: fit-content;
  margin-top: 8px;
  padding: 5px 8px;
  color: #06120f;
  background: var(--accent-2);
  border-radius: 6px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2,
p {
  margin: 0;
}

h1 {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.05;
}

h2 {
  font-size: 18px;
}

.primary-button {
  min-width: 96px;
  border: 1px solid #54e2b3;
  border-radius: 6px;
  padding: 10px 16px;
  color: #06120f;
  background: var(--accent);
  cursor: pointer;
}

.secondary-button {
  min-width: 120px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px 16px;
  color: var(--text);
  background: var(--surface-2);
  cursor: pointer;
}

.secondary-button[aria-pressed="true"] {
  border-color: #f3c55b;
  color: #06120f;
  background: var(--accent-2);
}

.control-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 12px;
  padding: 14px;
  margin-bottom: 14px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.lesson-banner {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1.1fr);
  gap: 14px;
  align-items: center;
  padding: 14px 16px;
  margin-bottom: 14px;
  background: #111719;
  border: 1px solid var(--line);
  border-left: 4px solid var(--accent-2);
  border-radius: 8px;
}

.lesson-banner h2 {
  margin: 0;
  font-size: 20px;
  line-height: 1.25;
}

.lesson-banner p:last-child {
  color: var(--muted);
  line-height: 1.45;
}

body.lesson-mode [data-advanced-control] {
  display: none;
}

body.lesson-mode .control-strip {
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
}

label {
  display: grid;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

select,
input[type="range"] {
  width: 100%;
}

select {
  min-height: 38px;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
}

input[type="range"] {
  accent-color: var(--accent);
}

label span {
  color: var(--text);
  font-size: 14px;
}

.workarea {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(360px, 0.9fr);
  gap: 14px;
}

.panel {
  min-width: 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.tracking-panel {
  margin-top: 14px;
}

.panel-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
}

.panel-header p {
  color: var(--muted);
  font-size: 13px;
}

canvas {
  display: block;
  width: 100%;
  height: auto;
  background: #090d0f;
}

.technique-description {
  display: grid;
  gap: 10px;
  padding: 14px 16px 16px;
  border-top: 1px solid var(--line);
  background: #111719;
}

.description-label {
  margin-bottom: 2px;
  color: var(--accent);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0;
}

.technique-description h3 {
  margin: 0;
  font-size: 18px;
  line-height: 1.2;
}

.technique-description p,
.technique-description li {
  color: var(--muted);
  line-height: 1.45;
}

.technique-description ul {
  display: grid;
  gap: 6px;
  margin: 0;
  padding-left: 18px;
}

.technique-description .reference-note {
  color: #7f928d;
  font-size: 12px;
}

.notes {
  margin-top: 14px;
  padding: 12px 14px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  line-height: 1.45;
}

.notes strong {
  color: var(--text);
}

.site-demo .notes {
  display: grid;
  gap: 6px;
}

.site-demo .notes p {
  color: var(--muted);
}

.public-demo .control-strip label:nth-child(2),
.public-demo .control-strip label[data-advanced-control] {
  display: none;
}

.public-demo .control-strip {
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
}

@media (max-width: 980px) {
  .control-strip,
  .workarea,
  .lesson-banner {
    grid-template-columns: 1fr;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .topbar-actions,
  .primary-button,
  .secondary-button {
    width: 100%;
  }
}