:root {
  --canvas: #041021;
  --surface: #0b1c32;
  --surface-2: #132e4f;
  --line: rgba(125, 179, 235, 0.32);
  --text: #dce9ff;
  --muted: #9cb4d7;
  --accent: #67b8ff;
  --accent-warm: #f7b267;
  --ok: #69d4b4;
}

* { box-sizing: border-box; }

body {
  min-width: 320px;
  margin: 0;
  background: var(--canvas);
  color: var(--text);
  font-family: "Segoe UI", Inter, Arial, sans-serif;
}

a { color: inherit; }

.app-shell {
  width: min(1520px, 100%);
  min-height: 100vh;
  margin: 0 auto;
}

.topbar {
  min-height: 68px;
  padding: 12px 24px;
  border-bottom: 1px solid var(--line);
  background: #07162a;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.brand-lockup,
.topbar-actions,
.status {
  display: flex;
  align-items: center;
}

.brand-lockup { gap: 11px; }

.brand-mark {
  width: 30px;
  height: 30px;
  border: 1px solid var(--accent);
  display: grid;
  place-items: center;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
}

.brand-lockup strong,
.brand-lockup span { display: block; }
.brand-lockup strong { font-size: 14px; }
.brand-lockup div span { margin-top: 2px; color: var(--muted); font-size: 12px; }

.topbar-actions { gap: 16px; color: var(--muted); font-size: 13px; }
.topbar-actions a { color: var(--text); text-decoration: none; }
.topbar-actions a:hover { color: var(--accent); }
.status { gap: 7px; }
.status i { width: 8px; height: 8px; background: var(--ok); border-radius: 50%; }

.workspace {
  min-height: calc(100vh - 68px);
  display: grid;
  grid-template-columns: 232px minmax(0, 1fr) 276px;
}

.sidebar,
.context-panel {
  padding: 28px 20px;
  background: var(--surface);
}

.sidebar { border-right: 1px solid var(--line); }
.context-panel { border-left: 1px solid var(--line); }

.sidebar-label,
.kicker {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.view-list { display: grid; gap: 5px; }

.view-button {
  width: 100%;
  min-height: 42px;
  padding: 0 10px;
  border: 1px solid transparent;
  border-left: 2px solid transparent;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  text-align: left;
}

.view-button span { display: inline-block; width: 30px; color: #6386ad; font-size: 11px; }
.view-button:hover { background: rgba(103, 184, 255, 0.08); color: var(--text); }
.view-button.is-active { border-color: var(--line); border-left-color: var(--accent); background: rgba(103, 184, 255, 0.1); color: var(--text); }
.view-button.is-active span { color: var(--accent); }

.sidebar-note {
  margin-top: 34px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
  line-height: 1.55;
}
.sidebar-note b { color: var(--text); font-size: 12px; }
.sidebar-note p { margin: 7px 0 0; }

.demo-stage { padding: 28px clamp(18px, 3vw, 42px) 34px; min-width: 0; }
.stage-heading { display: flex; justify-content: space-between; gap: 18px; align-items: start; margin-bottom: 20px; }
.stage-heading h1 { margin: 0; font-size: 26px; letter-spacing: 0; }
.stage-heading .kicker { margin-bottom: 7px; }

.view-tag {
  flex: 0 0 auto;
  margin-top: 4px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  color: var(--accent-warm);
  font-size: 11px;
}

.preview-frame {
  overflow: hidden;
  border: 1px solid var(--line);
  background: #071225;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.3);
}

.preview-frame img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
}

.context-panel h2 { margin: 0; font-size: 20px; line-height: 1.25; }
.context-panel > p:not(.sidebar-label) { margin: 14px 0 24px; color: var(--muted); font-size: 13px; line-height: 1.55; }
.context-panel dl { margin: 0; }
.context-panel dl div { padding: 12px 0; border-top: 1px solid var(--line); }
.context-panel dt { margin-bottom: 5px; color: var(--accent-warm); font-size: 11px; font-weight: 700; text-transform: uppercase; }
.context-panel dd { margin: 0; color: var(--text); font-size: 13px; line-height: 1.4; }
.local-link { display: inline-block; margin-top: 24px; color: var(--accent); font-size: 13px; text-decoration: none; }
.local-link:hover { text-decoration: underline; }

@media (max-width: 1080px) {
  .workspace { grid-template-columns: 190px minmax(0, 1fr); }
  .context-panel { display: none; }
}

@media (max-width: 720px) {
  .topbar { padding: 12px 16px; }
  .status { display: none; }
  .workspace { display: block; }
  .sidebar { padding: 18px 16px; border-right: 0; border-bottom: 1px solid var(--line); }
  .view-list { display: flex; overflow-x: auto; }
  .view-button { flex: 0 0 auto; width: auto; white-space: nowrap; }
  .sidebar-note { display: none; }
  .demo-stage { padding: 22px 16px; }
  .stage-heading h1 { font-size: 23px; }
  .view-tag { display: none; }
}