.ergo-wrapper {
  --e-accent: #0ea5e9;
  --e-ok: #22c55e;
  --e-warn: #f59e0b;
  --e-danger: #ef4444;
  --e-surface: var(--bg-surface);
  --e-border: var(--border-color);
  --e-text: var(--text-main);
  --e-muted: var(--text-muted);
  --e-page: var(--bg-page);

  width: 100%;
  padding: 1rem 0;
}

.ergo-card {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
  background: var(--e-surface);
  border: 1px solid var(--e-border);
  border-radius: 24px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ---- HEADER ---- */
.ergo-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--e-border);
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
}

.ergo-mode-toggle {
  display: flex;
  background: var(--e-page);
  padding: 4px;
  border-radius: 14px;
  gap: 2px;
  border: 1px solid var(--e-border);
}

.ergo-mode-btn {
  flex: 1;
  padding: 0.55rem 0.5rem;
  border: none;
  background: transparent;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--e-muted);
  cursor: pointer;
  transition: all 0.25s;
}

.ergo-mode-active {
  background: var(--e-accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(14, 165, 233, 0.3);
}

.ergo-field {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.ergo-field-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.ergo-label {
  font-size: 0.625rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--e-muted);
}

.ergo-val {
  font-size: 0.875rem;
  font-weight: 800;
  color: var(--e-text);
}

.ergo-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--e-page);
  outline: none;
  border: none;
  -webkit-appearance: none;
  appearance: none;
}

.ergo-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--e-accent);
  cursor: pointer;
  border: 3px solid var(--e-surface);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

.ergo-slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--e-accent);
  cursor: pointer;
  border: 3px solid var(--e-surface);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.3);
}

.ergo-gender-row {
  display: flex;
  gap: 0.5rem;
}

.ergo-gender-btn {
  flex: 1;
  padding: 0.5rem;
  border-radius: 10px;
  border: 1px solid var(--e-border);
  background: var(--e-page);
  color: var(--e-muted);
  font-size: 0.8rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.ergo-gender-active {
  background: var(--e-accent);
  border-color: var(--e-accent);
  color: #fff;
}

/* ---- VISUALIZER ---- */
.ergo-viz {
  position: relative;
  flex: 1;
  min-height: 340px;
  background: var(--e-page);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 2rem 2rem 2.5rem;
  gap: 1.5rem;
  overflow: hidden;
}

.ergo-tower {
  position: relative;
  width: 72px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.ergo-tower-track {
  position: relative;
  width: 100%;
  height: 220px;
  background: var(--e-surface);
  border-radius: 16px;
  border: 1px solid var(--e-border);
  overflow: hidden;
}

.ergo-tower-zone {
  position: absolute;
  left: 0;
  right: 0;
  background: linear-gradient(180deg, rgba(34,197,94,0.08), rgba(34,197,94,0.03));
  border-top: 1px dashed rgba(34,197,94,0.25);
  border-bottom: 1px dashed rgba(34,197,94,0.25);
}

.ergo-tower-fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, rgba(14,165,233,0.25), rgba(14,165,233,0.08));
  border-radius: 0 0 14px 14px;
  transition: height 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.ergo-tower-pip {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--e-accent);
  box-shadow: 0 0 8px rgba(14, 165, 233, 0.4);
  transition: bottom 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.ergo-tower-pip::after {
  content: '';
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--e-accent);
}

.ergo-tower-icon {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--e-surface);
  border: 1px solid var(--e-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--e-muted);
}

.ergo-tower-icon svg {
  width: 18px;
  height: 18px;
  stroke: currentcolor;
  stroke-width: 2;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.ergo-tower-label {
  font-size: 0.6rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--e-muted);
}

.ergo-tower-val {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--e-text);
  line-height: 1;
}

.ergo-tower-unit {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--e-muted);
}

/* Ruler lines */
.ergo-ruler {
  position: absolute;
  left: 0.75rem;
  top: 2rem;
  bottom: 3rem;
  width: 1px;
  background: linear-gradient(to bottom, transparent 0%, var(--e-border) 10%, var(--e-border) 90%, transparent 100%);
}

.ergo-ruler-mark {
  position: absolute;
  left: 2px;
  width: 6px;
  height: 1px;
  background: var(--e-border);
}

/* Distance arc */
.ergo-arc {
  position: absolute;
  left: 50%;
  top: 2rem;
  transform: translateX(-50%);
  width: 120px;
  height: 60px;
  border: 1px dashed rgba(14, 165, 233, 0.2);
  border-bottom: none;
  border-radius: 60px 60px 0 0;
  pointer-events: none;
}

.ergo-arc-label {
  position: absolute;
  left: 50%;
  top: 0.5rem;
  transform: translateX(-50%);
  font-size: 0.6rem;
  font-weight: 800;
  color: var(--e-accent);
  letter-spacing: 0.05em;
  white-space: nowrap;
}

/* ---- FOOTER ---- */
.ergo-footer {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid var(--e-border);
}

.ergo-stat {
  text-align: center;
  padding: 0.625rem 0.375rem;
  border-radius: 14px;
  background: var(--e-page);
  border: 1px solid var(--e-border);
  transition: transform 0.2s, border-color 0.2s;
}

.ergo-stat:hover {
  transform: translateY(-2px);
  border-color: rgba(14, 165, 233, 0.25);
}

.ergo-stat-label {
  font-size: 0.55rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.13em;
  color: var(--e-muted);
  margin: 0 0 0.25rem;
}

.ergo-stat-value {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--e-text);
  margin: 0;
}

/* ---- RESPONSIVE ---- */
@media (max-width: 520px) {
  .ergo-wrapper { padding: 0.75rem 0; }
  .ergo-card { border-radius: 20px; }
  .ergo-header { padding: 1rem; }
  .ergo-viz { padding: 1.5rem 1rem 2rem; gap: 1rem; min-height: 300px;
  }
  .ergo-tower { width: 60px; }
  .ergo-tower-track { height: 180px; }
  .ergo-footer { grid-template-columns: 1fr; padding: 0.75rem 1rem; gap: 0.4rem;
  }
}