:root {
  --void: #0b0e14;
  --panel: rgba(21, 26, 36, 0.86);
  --phosphor: #ffb454;
  --signal: #5fd9a4;
  --paper: #e7e4da;
  --dim: #7c8496;
  --wire: #2a3040;
  --font-mono: 'SF Mono', 'Cascadia Mono', Consolas, ui-monospace, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--void);
  color: var(--paper);
  font-family: var(--font-sans);
  overflow: hidden;
}

body {
  display: flex;
  flex-direction: column;
}

#ui-header {
  position: fixed;
  top: 0.9rem;
  inset-inline-start: 1rem;
  z-index: 10;
  background: var(--panel);
  border: 1px solid var(--wire);
  border-radius: 6px;
  padding: 0.3rem 0.8rem;
  backdrop-filter: blur(4px);
}

#ui-title-link { text-decoration: none; }
#ui-title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--phosphor);
}
#ui-title-link:hover #ui-title { text-decoration: underline; }

#scene-container {
  flex: 1 1 auto;
  min-height: 0;
  position: relative;
}
#scene-container canvas { display: block; width: 100%; height: 100%; }

#control-bar {
  flex: 0 0 auto;
  background: var(--panel);
  border-top: 1px solid var(--wire);
  backdrop-filter: blur(6px);
  padding: 0.6rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.ctl-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: transparent;
  color: var(--phosphor);
  border: 1px solid var(--phosphor);
  border-radius: 5px;
  padding: 0.35em 0.9em;
  cursor: pointer;
}
.ctl-btn:hover { background: rgba(255, 180, 84, 0.12); }

.ctl-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--dim);
}

#speed-slider { accent-color: var(--phosphor); width: 110px; }
#speed-label, #date-readout { color: var(--signal); min-width: 3ch; }

#lang-select {
  background: var(--void);
  color: var(--paper);
  border: 1px solid var(--wire);
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.2em 0.4em;
}

#focus-label { color: var(--dim); flex: 0 0 auto; }

#body-selector {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  flex: 1 1 auto;
  padding-bottom: 0.15rem;
}

.body-btn {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  background: transparent;
  color: var(--paper);
  border: 1px solid var(--wire);
  border-radius: 4px;
  padding: 0.25em 0.7em;
  cursor: pointer;
  white-space: nowrap;
}
.body-btn:hover { border-color: var(--signal); }
.body-btn.active { border-color: var(--signal); color: var(--signal); }

#ad-slot {
  flex: 0 0 90px;
  background: #05070b;
  border-top: 1px solid var(--wire);
  display: flex;
  align-items: center;
  justify-content: center;
}
.ad-slot-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--wire);
}

@media (max-width: 720px) {
  #ui-header { top: 0.5rem; inset-inline-start: 0.5rem; padding: 0.2rem 0.5rem; }
  #ui-title { font-size: 0.82rem; }
  #control-bar { font-size: 0.74rem; padding: 0.45rem 0.6rem; }
  #speed-slider { width: 70px; }
  #ad-slot { flex-basis: 60px; }
}