*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: system-ui, -apple-system, sans-serif;
  background: var(--bg, #1e1e2e);
  color: var(--fg, #cdd6f4);
}

header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 1rem;
  background: var(--ui-statusline, #181825);
  border-bottom: 1px solid var(--border, #313244);
  flex-shrink: 0;
}

header h1 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--info, #89b4fa);
}

header label {
  font-size: 0.75rem;
  color: var(--text-comment, #6c7086);
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

header select {
  font-size: 0.75rem;
  background: var(--bg, #1e1e2e);
  color: var(--fg, #cdd6f4);
  border: 1px solid var(--border, #313244);
  border-radius: 4px;
  padding: 0.15rem 0.25rem;
}

#preset-desc {
  font-size: 0.75rem;
  color: var(--text-comment, #6c7086);
  font-style: italic;
}

main {
  flex: 1;
  min-height: 0;
  position: relative;
}

#viewport {
  position: absolute;
  inset: 0;
}

.panel {
  position: absolute;
  border: 1px solid var(--border, #313244);
  border-radius: 6px;
  background: var(--bg, #1e1e2e);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: none;
}

.panel.focused {
  border-color: var(--ui-focus, #89b4fa);
  border-width: 2px;
  z-index: 10;
}

.panel-title {
  padding: 0.25rem 0.5rem;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  border-bottom: 1px solid var(--border, #313244);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.panel.focused .panel-title {
  font-weight: 700;
}

.panel-body {
  flex: 1;
  padding: 0.5rem;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.65rem;
  color: var(--text-comment, #6c7086);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

footer {
  flex-shrink: 0;
  background: var(--ui-statusline, #181825);
  border-top: 1px solid var(--border, #313244);
  padding: 0.25rem 1rem;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.7rem;
}

#status-line {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#status-line .sep {
  color: var(--border, #313244);
}

#st-preset { color: var(--info, #89b4fa); }
#st-theme { color: var(--success, #a6e3a1); }
#st-panels { color: var(--warning, #f9e2af); }
#st-focus { color: var(--warning, #f9e2af); }
#st-diff { color: var(--text-comment, #6c7086); }

#help-line {
  color: var(--text-comment, #6c7086);
  font-size: 0.65rem;
  margin-top: 0.15rem;
}

/* -- Help overlay -- */

#overlay-container {
  position: absolute;
  inset: 0;
  z-index: 100;
  display: none;
  pointer-events: none;
}

.overlay {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.6);
  pointer-events: auto;
}

.overlay-card {
  background: var(--bg, #1e1e2e);
  border: 1px solid var(--border, #313244);
  border-radius: 8px;
  padding: 1.5rem 2rem;
  max-height: 90%;
  overflow-y: auto;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.overlay-card h2 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--info, #89b4fa);
  margin-bottom: 0.75rem;
  text-align: center;
}

.overlay-card table {
  border-collapse: collapse;
  font-family: 'SF Mono', 'Cascadia Code', 'Fira Code', monospace;
  font-size: 0.75rem;
}

.overlay-card tr + tr td {
  padding-top: 0.25rem;
}

.overlay-card td {
  padding: 0.1rem 0.5rem;
}

.overlay-key {
  color: var(--warning, #f9e2af);
  font-weight: 600;
  text-align: right;
  white-space: nowrap;
}