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

:root {
  --bg: #1c1c1c;
  --bg-dark: #121212;
  --text: #e0e0e0;
  --text-dim: #888;
  --accent: #4a9eff;
  --racer-1: #e74c3c;
  --racer-2: #3498db;
  --racer-3: #2ecc71;
  --racer-4: #e1b909;
  --border: #333;
  --ring-bg: rgba(255, 255, 255, 0.05);
  --row-bg: rgba(255, 255, 255, 0.03);
  --row-finished: rgba(255, 255, 255, 0.08);
  --countdown-glow: rgba(255, 255, 255, 0.8);
  --modal-bg: var(--bg-dark);
  --panel-bg: var(--bg);
  --tail-glow: rgba(255, 255, 255, 0.3);
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #f0f0f5;
  --bg-dark: #ffffff;
  --text: #1a1a2e;
  --text-dim: #666;
  --accent: #2563eb;
  --border: #d0d0d8;
  --ring-bg: rgba(0, 0, 0, 0.06);
  --row-bg: rgba(0, 0, 0, 0.03);
  --row-finished: rgba(0, 0, 0, 0.07);
  --countdown-glow: rgba(0, 0, 0, 0.3);
  --modal-bg: #ffffff;
  --panel-bg: #fff;
  --tail-glow: rgba(0, 0, 0, 0.15);
  color-scheme: light;
}

body {
  background: var(--bg-dark);
  color: var(--text);
  font-family: "Courier New", monospace;
  overflow: hidden;
  height: 100vh;
  width: 100vw;
}

#app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  max-width: 1920px;
  margin: 0 auto;
}

/* Top bar */
#top-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 20px;
  flex-shrink: 0;
  z-index: 50;
}
#top-left {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-dim);
  letter-spacing: 1px;
}
#top-right {
  display: flex;
  align-items: center;
  gap: 16px;
}
#status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #e74c3c;
  flex-shrink: 0;
  transition: background 0.3s;
}
#status-dot.connected {
  background: #2ecc71;
  box-shadow: 0 0 6px #2ecc7188;
}
.settings-section-header {
  letter-spacing: 4px;
  margin: 24px 0 12px;
  font-size: 18px;
  color: var(--accent);
  text-align: center;
}
.color-pickers {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}
.color-pick {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  position: relative;
}
.color-pick label {
  font-size: 13px;
  color: var(--text-dim);
  order: 1;
}
.color-swatch {
  width: 48px;
  height: 48px;
  border: 2px solid var(--border);
  border-radius: 50%;
  cursor: pointer;
  transition: border-color 0.2s;
}
.color-swatch:hover {
  border-color: var(--text-dim);
}
.color-popup {
  position: fixed;
  z-index: 500;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}
.color-popup hex-color-picker {
  width: 180px;
  height: 180px;
}
.color-popup-footer {
  display: flex;
  gap: 6px;
  margin-top: 8px;
}
.color-hex {
  flex: 1;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  padding: 6px 8px;
  border-radius: 4px;
  text-align: center;
  outline: none;
}
.color-hex:focus {
  border-color: var(--accent);
}
.color-eyedrop {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-size: 16px;
  padding: 4px 8px;
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 0.2s;
}
.color-eyedrop:hover {
  border-color: var(--text-dim);
}
#reset-colors-btn,
#reset-logos-btn {
  display: block;
  margin: 10px auto 0;
  background: none;
  border: none;
  color: #e74c3c;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s;
}
#reset-colors-btn:hover,
#reset-logos-btn:hover {
  opacity: 0.7;
}

/* Logo pickers */
.logo-pickers {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.logo-pick {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}
.logo-preview {
  width: 80px;
  height: 50px;
  border: 1px dashed var(--border);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--row-bg);
}
.logo-preview img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
.logo-preview.has-image {
  border-style: solid;
}
.logo-actions {
  display: flex;
  align-items: center;
  gap: 6px;
}
.logo-upload-label {
  font-size: 12px;
  color: var(--text-dim);
  cursor: pointer;
  transition: color 0.2s;
}
.logo-upload-label:hover {
  color: var(--text);
}
.logo-clear {
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
  padding: 0 2px;
  line-height: 1;
}
.logo-clear:hover {
  color: #e74c3c;
}
.settings-footer {
  margin-top: 32px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
}
.settings-footer-cols {
  display: flex;
  gap: 40px;
  justify-content: center;
}
.settings-footer-col {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.settings-footer-row {
  display: flex;
  gap: 12px;
  justify-content: center;
}
#reset-config-btn {
  background: none;
  border: none;
  color: #e74c3c;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s;
}
#reset-config-btn:hover {
  opacity: 0.7;
}
#reset-config-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
}
#reset-config-modal.hidden {
  display: none;
}
#reset-config-ok {
  background: #e74c3c;
  border: none;
  color: white;
  font-weight: bold;
}
#reset-config-ok:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}
#import-config-label {
  display: inline-block;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 1px;
  padding: 12px 24px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}
#import-config-label:hover {
  border-color: var(--accent);
  color: var(--accent);
}
#export-config-btn {
  background: var(--accent);
  border: none;
  color: var(--bg-dark);
  font-family: inherit;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 1px;
  padding: 12px 24px;
  cursor: pointer;
  border-radius: 4px;
  transition: opacity 0.2s;
}
#export-config-btn:hover {
  opacity: 0.85;
}
#download-logs-btn {
  background: var(--accent);
  border: none;
  color: var(--bg-dark);
  font-family: inherit;
  font-size: 14px;
  font-weight: bold;
  letter-spacing: 1px;
  padding: 12px 24px;
  cursor: pointer;
  border-radius: 4px;
  transition: opacity 0.2s;
}
#download-logs-btn:hover {
  opacity: 0.85;
}
#log-summary {
  margin-top: 10px;
  font-size: 13px;
  color: var(--text-dim);
  text-align: center;
}
#reset-logs-btn {
  display: block;
  margin: 10px auto 0;
  background: transparent;
  border: none;
  color: #e74c3c;
  font-family: inherit;
  font-size: 13px;
  cursor: pointer;
  padding: 0;
  transition: opacity 0.2s;
}
#reset-logs-btn:hover {
  opacity: 0.7;
}

/* Confirm Modal */
#confirm-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
}
#confirm-modal.hidden {
  display: none;
}
.confirm-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
}
.confirm-panel {
  position: relative;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 32px 36px;
  z-index: 1;
  max-width: 420px;
  text-align: center;
}
#confirm-message {
  font-size: 16px;
  line-height: 1.5;
  margin-bottom: 24px;
}
.confirm-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
}
.confirm-buttons button {
  font-family: inherit;
  font-size: 14px;
  padding: 10px 24px;
  border-radius: 4px;
  cursor: pointer;
  transition: opacity 0.2s;
}
#confirm-cancel {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}
#confirm-cancel:hover {
  border-color: var(--text-dim);
}
#confirm-ok {
  background: #e74c3c;
  border: none;
  color: white;
  font-weight: bold;
}
#confirm-ok:hover {
  opacity: 0.85;
}
#theme-toggle-btn,
#settings-gear-btn {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  width: 36px;
  height: 36px;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  transition: color 0.2s;
}
#theme-toggle-btn:hover,
#settings-gear-btn:hover {
  color: var(--text);
}

/* Compatibility banner */
#compat-banner {
  background: #e1b909;
  color: #1c1c1c;
  font-size: 14px;
  padding: 8px 20px;
  position: relative;
  flex-shrink: 0;
  text-align: center;
}

/* Race View */
#race-view {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 20px 12px;
  min-height: 0;
}

#dial-area {
  flex: 1 1 auto;
  min-height: 0;
  width: 100%;
  position: relative;
  display: flex;
  justify-content: center;
  container-type: size;
}
.logo-slot {
  position: absolute;
  display: flex;
  align-items: center;
  justify-content: center;
  width: calc((100cqw - 100cqh) / 2);
  height: 50%;
  overflow: hidden;
  padding: 12px;
}
.logo-slot:empty {
  pointer-events: none;
}
.logo-slot img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}
#logo-slot-0 {
  top: 0;
  left: 0;
}
#logo-slot-1 {
  top: 0;
  right: 0;
}
#logo-slot-2 {
  bottom: 0;
  left: 0;
}
#logo-slot-3 {
  bottom: 0;
  right: 0;
}

#race-dial {
  position: relative;
  min-height: 0;
  height: 100%;
  aspect-ratio: 1;
}
#dial-canvas {
  width: 100%;
  height: 100%;
}

#race-bottom {
  display: flex;
  align-items: center;
  gap: 20px;
  width: 100%;
  max-width: 1000px;
  flex-shrink: 0;
}

#racer-rows {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.racer-row {
  display: flex;
  align-items: center;
  padding: 10px 16px;
  border-left: 6px solid;
  background: var(--row-bg);
  border-radius: 4px;
  gap: 16px;
  transition: background 0.3s;
}
.racer-row.finished {
  background: var(--row-finished);
}
.racer-row .racer-name {
  flex: 1;
  font-size: 20px;
  font-weight: bold;
  background: transparent;
  border: none;
  border-bottom: 1px solid transparent;
  color: var(--text);
  font-family: inherit;
  padding: 2px 0;
  outline: none;
  min-width: 0;
}
.racer-row .racer-name:focus {
  border-bottom-color: var(--text-dim);
}
.racer-row .racer-name.locked {
  pointer-events: none;
  opacity: 0.9;
}
.racer-row .racer-speed {
  width: 120px;
  text-align: right;
  font-size: 18px;
  color: var(--text-dim);
}
.racer-row .racer-progress {
  width: 140px;
  text-align: right;
  font-size: 18px;
}

#race-timer {
  display: none;
}

#countdown {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 200px;
  font-weight: bold;
  color: var(--text);
  z-index: 100;
  pointer-events: none;
  text-shadow:
    0 0 40px var(--countdown-glow),
    0 0 80px var(--countdown-glow),
    0 0 160px var(--countdown-glow);
}
#countdown.hidden {
  display: none;
}

#start-stop-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  align-self: center;
  flex-shrink: 0;
  gap: 6px;
}
#start-stop-btn {
  --hold: 0;
  font-family: inherit;
  font-size: 22px;
  letter-spacing: 4px;
  width: 140px;
  padding: 14px 0;
  border: 2px solid #2ecc71;
  background: transparent;
  color: #2ecc71;
  cursor: pointer;
  transition:
    border-color 0.2s,
    color 0.2s;
  position: relative;
  overflow: hidden;
}
#start-stop-btn:hover:not(.disabled):not(.running) {
  background: #2ecc71;
  color: var(--bg-dark);
}
#start-stop-btn.disabled {
  border-color: var(--border);
  color: var(--text-dim);
  cursor: not-allowed;
}
#start-stop-btn.running {
  border-color: #e74c3c;
  color: #e74c3c;
  background: linear-gradient(
    to bottom,
    transparent calc(var(--hold) * 100%),
    rgba(231, 76, 60, 0.25) calc(var(--hold) * 100%)
  );
}
#hold-hint {
  font-size: 11px;
  color: var(--text-dim);
  letter-spacing: 1px;
  opacity: 0;
  transition: opacity 0.2s;
}
#start-stop-btn.running ~ #hold-hint {
  opacity: 1;
}

/* Settings Modal */
#settings-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
}
#settings-modal.hidden {
  display: none;
}
.settings-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
}
.settings-panel {
  position: relative;
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 40px 48px;
  z-index: 1;
  max-width: 800px;
  width: 90%;
  max-height: 85vh;
  overflow-y: auto;
}
#settings-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 32px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 10px;
  transition: color 0.2s;
}
#settings-close:hover {
  color: var(--text);
}
#settings-notice {
  background: var(--accent);
  color: var(--bg-dark);
  font-size: 13px;
  padding: 10px 36px;
  border-radius: 4px;
  margin-bottom: 20px;
  position: relative;
  line-height: 1.4;
  text-align: center;
}
#settings-notice-close {
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--bg-dark);
  font-size: 18px;
  cursor: pointer;
  line-height: 1;
  opacity: 0.7;
}
#settings-notice-close:hover {
  opacity: 1;
}
.settings-columns {
  display: flex;
  gap: 60px;
  justify-content: center;
}
.settings-col {
  flex: 1;
}
.settings-col h3 {
  letter-spacing: 4px;
  margin-bottom: 24px;
  font-size: 18px;
  color: var(--accent);
  text-align: center;
}
.setting-row {
  margin-bottom: 20px;
  text-align: center;
}
.setting-row label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: var(--text-dim);
  letter-spacing: 1px;
}
.setting-row input[type="number"] {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-family: inherit;
  font-size: 18px;
  padding: 8px 12px;
  width: 160px;
  border-radius: 4px;
  outline: none;
  text-align: center;
}
.setting-row input[type="number"]:focus {
  border-color: var(--accent);
}
.setting-row input[type="checkbox"] {
  margin-right: 8px;
  accent-color: var(--accent);
}
.setting-row label:has(input[type="checkbox"]) {
  display: flex;
  align-items: center;
  cursor: pointer;
  font-size: 16px;
  color: var(--text);
}

.num-stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.num-stepper button {
  width: 36px;
  height: 36px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 20px;
  cursor: pointer;
  border-radius: 4px;
}
.num-stepper button:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.num-stepper span {
  font-size: 24px;
  min-width: 30px;
  text-align: center;
}

.toggle-group {
  display: inline-flex;
  gap: 0;
}
.toggle-btn {
  padding: 8px 20px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 14px;
  letter-spacing: 1px;
  cursor: pointer;
  transition: all 0.2s;
}
.toggle-btn:first-child {
  border-radius: 4px 0 0 4px;
}
.toggle-btn:last-child {
  border-radius: 0 4px 4px 0;
}
.toggle-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--bg-dark);
}

#connect-serial-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: inherit;
  font-size: 14px;
  padding: 8px 20px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}
#connect-serial-btn:hover {
  background: var(--accent);
  color: var(--bg-dark);
}
#connect-serial-btn.connected {
  border-color: var(--racer-1);
  color: var(--racer-1);
}
#connection-status {
  margin: 6px 0 8px;
}
#mock-mode-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-dim);
  font-family: inherit;
  font-size: 12px;
  padding: 5px 14px;
  cursor: pointer;
  border-radius: 4px;
  transition: all 0.2s;
}
#mock-mode-btn:hover {
  border-color: var(--text-dim);
  color: var(--text);
}
#mock-mode-btn.active {
  border-color: #e1b909;
  color: #e1b909;
}
#connection-status {
  font-size: 14px;
  color: var(--text-dim);
}

/* Winner Modal */
#winner-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--modal-bg);
}
#winner-modal.hidden {
  display: none;
}
#modal-close {
  position: absolute;
  top: 16px;
  left: 20px;
  background: none;
  border: none;
  color: var(--text-dim);
  font-size: 48px;
  cursor: pointer;
  line-height: 1;
  padding: 4px 10px;
  z-index: 1;
  transition: color 0.2s;
}
#modal-close:hover {
  color: var(--text);
}
#winner-label {
  font-size: 2vh;
  letter-spacing: 8px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 1vh;
}
#winner-name {
  font-size: min(12vh, 15vw);
  font-weight: bold;
  margin-bottom: 1vh;
}
#winner-stats {
  font-size: min(3.5vh, 4vw);
  color: var(--text-dim);
  margin-bottom: 5vh;
}
#results-table {
  width: 90%;
  max-width: 1200px;
  border-collapse: collapse;
}
#results-table tr {
  border-bottom: 1px solid var(--border);
}
#results-table td {
  padding: 2.5vh 20px;
  font-size: min(3vh, 3vw);
}
#results-table .result-pos {
  width: 60px;
  font-weight: bold;
  color: var(--text-dim);
  font-size: min(4vh, 4vw);
}
#results-table .result-color {
  width: 8px;
  padding: 0;
}
#results-table .result-color span {
  display: block;
  width: 8px;
  height: 100%;
  min-height: 28px;
  border-radius: 4px;
}
#results-table .result-name {
  font-weight: bold;
}
#results-table .result-stat {
  text-align: right;
  color: var(--text-dim);
}
#results-table .result-speed {
  text-align: right;
  color: var(--text-dim);
}

.hidden {
  display: none !important;
}

/* Credit */
#credit {
  position: fixed;
  bottom: 8px;
  right: 12px;
  font-size: 10px;
  color: var(--text-dim);
  line-height: 1.4;
  text-align: center;
  opacity: 0.5;
}
#heart-icon {
  vertical-align: -2px;
}
#credit-link {
  color: var(--text-dim);
  text-decoration: none;
}
#credit-link:hover {
  text-decoration: underline;
}

/* Responsive */
@media (max-width: 768px) {
  .settings-columns {
    flex-direction: column;
    gap: 30px;
  }
  .settings-panel {
    padding: 30px 24px;
  }
  #credit {
    position: static;
    margin-top: 8px;
    opacity: 0.5;
  }
}