:root {
  --bg: #040505;
  --surface: #121212;
  --surface-elevated: #1f1f1f;
  --text-primary: #ffffff;
  --text-secondary: #9e9e9e;

  --accent: #33eb73;
  --accent-2: #14b89f;
  --danger: #ff4d52;
  --danger-2: #d11f61;
  --gold: #ffd14d;

  --radius-card: 18px;
  --radius-button: 16px;

  --font-mono: ui-monospace, "SF Mono", "JetBrains Mono", Menlo, Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  background: radial-gradient(ellipse at top, #0a1410 0%, var(--bg) 55%);
  color: var(--text-primary);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.app {
  max-width: 480px;
  margin: 0 auto;
  min-height: 100vh;
  padding: 24px 20px 32px;
  display: flex;
  flex-direction: column;
}

.header {
  text-align: center;
  margin-bottom: 20px;
}

.title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 28px;
  letter-spacing: 5px;
  margin: 0;
  background: linear-gradient(to bottom, #ffffff, #a6a6a6);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.subtitle {
  margin: 6px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
}

.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: 999px;
  margin-bottom: 20px;
}

.tab {
  flex: 1;
  padding: 10px 0;
  border: none;
  border-radius: 999px;
  background: transparent;
  color: var(--text-secondary);
  font-family: inherit;
  font-size: 14px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  touch-action: manipulation;
}

.tab[aria-selected="true"] {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #000;
}

.tab:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.play-area {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  flex: 1;
}

.target-card {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
}

.label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-secondary);
}

.target-value {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
}

.ring-wrap {
  position: relative;
  width: min(280px, 78vw);
  height: min(280px, 78vw);
  margin: 8px 0;
}

.ring {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.ring-track {
  fill: none;
  stroke: rgba(255, 255, 255, 0.07);
  stroke-width: 10;
}

.ring-progress {
  fill: none;
  stroke: var(--accent);
  stroke-width: 10;
  stroke-linecap: round;
  stroke-dasharray: 552.9;
  stroke-dashoffset: 552.9;
  transition: stroke-dashoffset 0.05s linear, stroke 0.2s;
}

.ring-progress.dashed {
  stroke-dasharray: 4 10;
  stroke-dashoffset: 0;
}

.ring-progress.danger {
  stroke: var(--danger);
}

.ring-content {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.hint p {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  line-height: 1.5;
}

.countdown-number {
  font-family: var(--font-mono);
  font-size: 84px;
  font-weight: 800;
  color: var(--text-primary);
}

.running-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.go-label {
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--accent);
  opacity: 0;
}

.go-label.visible {
  opacity: 1;
}

.running-value {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 700;
  color: var(--accent);
}

.running-value.danger {
  color: var(--danger);
}

.result-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.result-value {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 700;
}

.result-error {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
}

.precision-pill {
  font-size: 12px;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 999px;
  margin-top: 4px;
}

.locked-display {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.locked-title {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--text-secondary);
}

.locked-countdown {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--text-primary);
}

.locked-sub {
  font-size: 12px;
  color: var(--text-secondary);
}

.action-button {
  width: 100%;
  height: 62px;
  border: none;
  border-radius: var(--radius-button);
  font-family: inherit;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 2px;
  cursor: pointer;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #000;
  box-shadow: 0 0 24px rgba(51, 235, 115, 0.25);
  transition: transform 0.1s, opacity 0.2s, background 0.2s, box-shadow 0.2s;
  touch-action: manipulation;
}

.action-button:active {
  transform: scale(0.97);
}

.action-button.danger {
  background: linear-gradient(135deg, var(--danger), var(--danger-2));
  color: #fff;
  box-shadow: 0 0 24px rgba(255, 77, 82, 0.25);
}

.action-button.muted {
  background: var(--surface-elevated);
  color: var(--text-secondary);
  box-shadow: none;
  cursor: default;
}

.action-button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.stats-row {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 14px 0;
  background: var(--surface);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-card);
}

.stat-value {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
}

.stat-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  color: var(--text-secondary);
  text-transform: uppercase;
}

.promo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  padding: 10px 16px;
  border: 1px solid rgba(51, 235, 115, 0.18);
  border-radius: 999px;
  background: rgba(51, 235, 115, 0.05);
}

.promo-icon {
  display: inline-flex;
  color: var(--accent);
  flex-shrink: 0;
}

.promo-text {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.3;
}

.promo-text strong {
  color: var(--accent);
  font-weight: 700;
}

.footer {
  text-align: center;
  margin-top: 16px;
}

.footer p {
  margin: 0;
  font-size: 11px;
  color: var(--text-secondary);
  opacity: 0.7;
}