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

:root {
  --void: #07080a;
  --bg: #0c0d10;
  --bg-2: #111318;
  --bg-3: #161820;
  --bg-4: #1c1f2a;
  --bg-5: #222638;
  --border: #1a1d28;
  --border-2: #232738;
  --border-3: #2e334a;
  --hud-green: #00ff88;
  --hud-green-d: #007040;
  --hud-blue: #00aaff;
  --hud-orange: #ff6b35;
  --text: #e1e4eb;
  --text-2: #8a8f9e;
  --text-3: #4a4f6c;
  --text-4: #2a2e4a;
  --glow-green: 0 0 15px rgba(0, 255, 136, 0.3);
  --glow-blue: 0 0 15px rgba(0, 170, 255, 0.3);
  --font-ui: "Rajdhani", "Segoe UI", system-ui, sans-serif;
  --font-mono: "Share Tech Mono", "Fira Code", monospace;
  --topbar-h: 52px;
  --sidebar-w: 280px;
  --r: 4px;
  --r-lg: 8px;
  --trans: 120ms ease;
}

html,
body {
  height: 100%;
  overflow: hidden;
  background: var(--void);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 13px;
  -webkit-font-smoothing: antialiased;
}

.app {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.hud-header {
  height: var(--topbar-h);
  flex-shrink: 0;
  background: rgba(12, 13, 16, 0.8);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 20px;
  gap: 20px;
  position: relative;
  z-index: 100;
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.hud-left {
  display: flex;
  align-items: center;
  gap: 12px;
  flex: 1;
  min-width: 0;
}
.hud-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 9px;
  flex-shrink: 0;
}
.brand-glyph {
  width: 20px;
  height: 18px;
  display: flex;
  align-items: flex-end;
  gap: 2.5px;
}
.bg-bar {
  border-radius: 1px;
  transition: height var(--trans);
}
.bg-b1 {
  width: 3px;
  height: 10px;
  background: var(--hud-green);
}
.bg-b2 {
  width: 3px;
  height: 14px;
  background: var(--hud-blue);
}
.bg-b3 {
  width: 3px;
  height: 8px;
  background: var(--hud-orange);
}
.bg-b4 {
  width: 3px;
  height: 18px;
  background: var(--hud-green);
  opacity: 0.6;
}
.brand-name {
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--text);
  text-transform: uppercase;
}

.dataset-selector {
  display: flex;
  gap: 3px;
  overflow-x: auto;
  scrollbar-width: none;
}
.dataset-selector::-webkit-scrollbar {
  display: none;
}
.ds-btn {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: transparent;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  padding: 4px 12px;
  border-radius: var(--r);
  cursor: pointer;
  transition: all var(--trans);
  white-space: nowrap;
  text-transform: uppercase;
  flex-shrink: 0;
}
.ds-btn:hover {
  background: var(--bg-4);
  color: var(--text);
  border-color: var(--border-3);
}
.ds-btn.active {
  background: rgba(0, 255, 136, 0.15);
  border-color: rgba(0, 255, 136, 0.5);
  color: var(--hud-green);
  box-shadow: var(--glow-green);
  transform: translateY(-1px);
}

.speed-control,
.top-n-control {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}
.sc-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--text-3);
  letter-spacing: 0.1em;
  flex-shrink: 0;
}
.sc-slider {
  width: 80px;
  accent-color: var(--hud-green);
  cursor: pointer;
}
.sc-val {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--hud-green);
  min-width: 24px;
}
.tn-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  padding: 3px 8px;
  border-radius: var(--r);
  cursor: pointer;
  transition: all var(--trans);
}
.tn-btn:hover {
  background: var(--bg-4);
  color: var(--text);
}
.tn-btn.active {
  background: rgba(0, 255, 136, 0.08);
  border-color: rgba(0, 255, 136, 0.25);
  color: var(--hud-green);
}

.hud-divider {
  width: 1px;
  height: 24px;
  background: var(--border-2);
  flex-shrink: 0;
  margin: 0 2px;
}

.hud-btn {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  padding: 5px 12px;
  border-radius: var(--r);
  cursor: pointer;
  transition: all var(--trans);
  white-space: nowrap;
}
.hud-btn:hover {
  background: var(--bg-4);
  color: var(--text);
  border-color: var(--border-3);
}

.race-layout {
  flex: 1;
  display: flex;
  overflow: hidden;
  min-height: 0;
}

.chart-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--bg);
  min-width: 0;
}

.chart-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px 8px;
  flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}

.ch-title {
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.ch-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.ch-unit {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-2);
  letter-spacing: 0.06em;
  background: var(--bg-3);
  padding: 3px 8px;
  border-radius: var(--r);
  border: 1px solid var(--border-2);
}
.ch-period {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-3);
  letter-spacing: 0.04em;
}

.chart-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}
#raceCanvas {
  display: block;
  width: 100%;
  height: 100%;
}

.chart-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  padding: 20px 28px;
}

.year-display {
  font-family: var(--font-ui);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: rgba(255, 255, 255, 0.06);
  text-align: right;
  line-height: 1;
  user-select: none;
  font-size: clamp(100px, 15vw, 220px);
  text-shadow: 0 0 40px rgba(0, 0, 0, 0.5);
  opacity: 0.12;
  transition: all 0.5s cubic-bezier(0.23, 1, 0.32, 1);
  background: linear-gradient(180, rgba(255, 255, 255, 0.1), transparent);
  -webkit-background-clip: text;
}

.year-display:hover {
  opacity: 0.25;
  transform: scale(1.02);
}

.chart-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 8px 24px;
  border-top: 1px solid var(--border);
  flex-shrink: 0;
  background: var(--bg);
}

.cf-left,
.cf-right {
  display: flex;
  align-items: center;
  gap: 10px;
}

.lead-badge {
  display: flex;
  align-items: center;
  gap: 8px;
}
.lb-icon {
  font-size: 14px;
}
.lb-name {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.04em;
}
.lb-val {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--hud-green);
}

.frame-counter {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-3);
}
.fps-badge {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--hud-green);
  background: rgba(0, 255, 136, 0.1);
  border: 1px solid rgba(0, 255, 136, 0.3);
  padding: 3px 10px;
  border-radius: 4px;
  box-shadow: var(--glow-green);
}

.control-panel {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--bg-2);
  border-left: 1px solid var(--border);
  overflow-y: auto;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-2) transparent;
}
.control-panel::-webkit-scrollbar {
  width: 4px;
}
.control-panel::-webkit-scrollbar-thumb {
  background: var(--border-2);
  border-radius: 2px;
}

.cp-section {
  border-bottom: 1px solid var(--border);
  padding: 12px 14px;
}
.cp-title {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 10px;
}

.timeline-wrap {
  position: relative;
  margin-bottom: 8px;
}
.timeline-slider {
  width: 100%;
  accent-color: var(--hud-green);
  cursor: pointer;
  height: 4px;
}
.timeline-markers {
  display: flex;
  justify-content: space-between;
  margin-top: 4px;
}
.tm-mark {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--text-3);
}

.playback-btns {
  display: flex;
  align-items: center;
  gap: 4px;
  justify-content: center;
}
.pb-btn {
  font-size: 14px;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  width: 34px;
  height: 32px;
  border-radius: var(--r-lg);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--trans);
}
.pb-btn:hover {
  background: var(--bg-4);
  color: var(--text);
}
.pb-btn-play {
  width: 44px;
  height: 38px;
  font-size: 16px;
  background: rgba(0, 255, 136, 0.1);
  border-color: rgba(0, 255, 136, 0.3);
  color: var(--hud-green);
}
.pb-btn-play:hover {
  background: rgba(0, 255, 136, 0.18);
}
.pb-btn-play.paused {
  background: rgba(255, 107, 53, 0.1);
  border-color: rgba(255, 107, 53, 0.3);
  color: var(--hud-orange);
}
.pb-btn[data-active="true"] {
  color: var(--hud-blue);
}

.interp-row {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 7px;
}
.ir-label {
  font-size: 11px;
  color: var(--text-2);
  flex: 1;
  white-space: nowrap;
  font-weight: 500;
}
.ir-select {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 11px;
  padding: 4px 6px;
  border-radius: var(--r);
  outline: none;
  cursor: pointer;
}
.ir-range {
  flex: 1;
  accent-color: var(--hud-blue);
  cursor: pointer;
  height: 3px;
}
.ir-val {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--hud-blue);
  min-width: 32px;
  text-align: right;
}

.appearance-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
  margin-bottom: 10px;
}
.ar-toggle {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  font-size: 11px;
  color: var(--text-2);
  padding: 3px 0;
}
.ar-toggle input[type="checkbox"] {
  accent-color: var(--hud-green);
  width: 13px;
  height: 13px;
  cursor: pointer;
}
.ar-toggle:hover span {
  color: var(--text);
}

.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5px;
}
.stat-cell {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 8px 9px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.sc-stat-label {
  font-family: var(--font-mono);
  font-size: 8px;
  color: var(--text-3);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.sc-stat-val {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--hud-green);
  text-shadow: var(--glow-green);
}

.leaderboard {
  display: flex;
  flex-direction: column;
  gap: 3px;
  max-height: 240px;
  overflow-y: auto;
  scrollbar-width: none;
}
.lb-item {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 7px;
  border-radius: var(--r);
  border: 1px solid transparent;
  transition: all var(--trans);
  cursor: default;
}
.lb-item:hover {
  background: var(--bg-3);
  border-color: var(--border);
}
.lb-rank {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-3);
  min-width: 18px;
  text-align: center;
}
.lb-rank.gold {
  color: #ffd700;
  font-weight: 700;
}
.lb-rank.silver {
  color: #c0c0c0;
  font-weight: 700;
}
.lb-rank.bronze {
  color: #cd7f32;
  font-weight: 700;
}
.lb-item-icon {
  font-size: 13px;
  flex-shrink: 0;
}
.lb-item-name {
  font-size: 11px;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.lb-item-val {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-2);
  flex-shrink: 0;
}
.lb-item-delta {
  font-family: var(--font-mono);
  font-size: 9px;
  flex-shrink: 0;
}
.lb-item-delta.pos {
  color: var(--hud-green);
}
.lb-item-delta.neg {
  color: var(--hud-orange);
}

.palette-row {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}
.pal-btn {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  padding: 4px 10px;
  border-radius: 999px;
  cursor: pointer;
  transition: all var(--trans);
  text-transform: uppercase;
}
.pal-btn:hover {
  background: var(--bg-4);
  color: var(--text);
}
.pal-btn.active {
  background: var(--bg-5);
  border-color: var(--border-3);
  color: var(--text);
}

.hidden {
  display: none !important;
}

@media (max-width: 900px) {
  .control-panel {
    display: none;
  }
  .hud-right {
    display: none;
  }
  .dataset-selector {
    max-width: 300px;
  }
}