:root {
  --color-bg: hsl(0 0% 100%);
  --color-surface: hsl(0 0% 100%);
  --color-border: hsl(220 14% 90%);
  --color-text: hsl(220 15% 15%);
  --color-text-muted: hsl(220 9% 46%);
  --color-accent: hsl(221 83% 53%);
  --color-accent-contrast: hsl(0 0% 100%);
  --color-active-bg: hsl(221 83% 96%);
  --shadow-panel: 0 8px 30px hsl(220 15% 15% / 0.14);
  --radius: 12px;
  --font-sans:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: hsl(220 18% 10%);
    --color-surface: hsl(220 16% 14%);
    --color-border: hsl(220 12% 24%);
    --color-text: hsl(0 0% 96%);
    --color-text-muted: hsl(220 9% 65%);
    --color-accent: hsl(221 83% 65%);
    --color-accent-contrast: hsl(220 18% 10%);
    --color-active-bg: hsl(221 40% 20%);
    --shadow-panel: 0 8px 30px hsl(0 0% 0% / 0.5);
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
  margin: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
}

.viewer {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--color-bg);
}

.launcher {
  position: fixed;
  left: 20px;
  bottom: 20px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  border: 0;
  border-radius: 999px;
  background: var(--color-text);
  color: var(--color-bg);
  font-family: inherit;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: var(--shadow-panel);
}

.launcher:hover {
  opacity: 0.92;
}

.launcher svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

.panel {
  position: fixed;
  left: 20px;
  bottom: 76px;
  z-index: 20;
  width: min(320px, calc(100vw - 40px));
  max-height: min(70vh, 560px);
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-panel);
  overflow: hidden;
}

.panel[hidden] {
  display: none;
}

.panel__header {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
}

.panel__title {
  margin: 0;
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
}

.panel__categories {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-border);
}

.chip {
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
  font-size: 13px;
  padding: 6px 12px;
  border-radius: 999px;
  cursor: pointer;
}

.chip[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-contrast);
  font-weight: 600;
}

.panel__templates {
  list-style: none;
  margin: 0;
  padding: 8px;
  overflow-y: auto;
}

.template-item {
  width: 100%;
  text-align: left;
  border: 0;
  background: transparent;
  color: var(--color-text);
  font-family: inherit;
  font-size: 14px;
  padding: 10px 10px;
  border-radius: 8px;
  cursor: pointer;
}

.template-item:hover {
  background: var(--color-active-bg);
}

.template-item[aria-current="true"] {
  background: var(--color-active-bg);
  color: var(--color-accent);
  font-weight: 600;
}