.endurance-calculator {
    --n-bg: #fff;
    --n-bg-muted: #f1f5f9;
    --n-text: #0f172a;
    --n-text-muted: #475569;
    --n-text-dim: #64748b;
    --n-border: #e2e8f0;
    --n-shadow: rgba(0, 0, 0, 0.05);
    --n-primary: #3b82f6;
    --n-primary-on: #fff;
    --n-accent: #6366f1;
    --n-cyan: #0891b2;
    --n-success: #10b981;
    --n-warning: #f59e0b;
    --n-error: #f43f5e;
    --ec-hero-bg: #0f172a;
    --ec-hero-label: #22d3ee;

    max-width: 1000px;
    margin: 0 auto;
  }

  .theme-dark .endurance-calculator {
    --n-bg: #0f172a;
    --n-bg-muted: #1e293b;
    --n-text: #f8fafc;
    --n-text-muted: #94a3b8;
    --n-text-dim: #64748b;
    --n-border: #334155;
    --n-shadow: rgba(0, 0, 0, 0.3);
    --n-primary: #60a5fa;
    --n-primary-on: #fff;
    --n-accent: #818cf8;
    --n-cyan: #22d3ee;
    --n-success: #34d399;
    --n-warning: #fbbf24;
    --n-error: #fb7185;
    --ec-hero-bg: #020617;
    --ec-hero-label: #22d3ee;
  }

  .ec-main-container {
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 1.5rem;
    display: grid;
    grid-template-columns: 360px 1fr;
    overflow: hidden;
    box-shadow: 0 20px 40px var(--n-shadow);
  }

  .ec-sidebar-inputs {
    padding: 1.5rem;
    border-right: 1px solid var(--n-border);
    background: var(--n-bg-muted);
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
  }

  .ec-compact-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .ec-compact-group label {
    font-size: 0.7rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--n-text-muted);
    letter-spacing: 0.06em;
  }

  .ec-dual-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
  }

  .ec-sub-label {
    font-size: 0.65rem;
    color: var(--n-text-muted);
    font-weight: 700;
    margin-bottom: 0.2rem;
    display: block;
  }

  .ec-field-wrapper {
    position: relative;
    display: flex;
    align-items: center;
  }

  .ec-field-icon {
    position: absolute;
    left: 8px;
    font-size: 0.9rem;
    color: var(--n-text-muted);
    pointer-events: none;
  }

  .ec-compact-input,
  .ec-compact-select {
    width: 100%;
    background: var(--n-bg);
    border: 1px solid var(--n-border);
    border-radius: 0.5rem;
    padding: 0.6rem 2.4rem 0.6rem 2.2rem;
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--n-text);
    outline: none;
    transition: border-color 0.2s;
  }

  .ec-compact-input:focus,
  .ec-compact-select:focus {
    border-color: var(--n-primary);
  }

  .ec-compact-select {
    padding-right: 0.6rem;
    cursor: pointer;
  }

  .ec-unit-tag {
    position: absolute;
    right: 8px;
    font-size: 0.65rem;
    font-weight: 800;
    color: var(--n-text-muted);
    pointer-events: none;
  }

  .ec-dashboard-panel {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 2rem;
  }

  .ec-hero-display {
    background: var(--ec-hero-bg);
    border-radius: 1rem;
    padding: 2rem;
    color: var(--n-primary-on);
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
  }

  .ec-hero-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
  }

  .ec-display-title {
    font-size: 0.65rem;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--ec-hero-label);
    letter-spacing: 0.1em;
  }

  .ec-main-value-row {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
  }

  .ec-main-value {
    font-size: 5rem;
    font-weight: 900;
    color: var(--n-primary-on);
    line-height: 1;
  }

  .ec-main-unit {
    font-size: 1.2rem;
    font-weight: 700;
    opacity: 0.4;
    color: var(--n-primary-on);
  }

  .ec-fuel-badge {
    font-size: 0.85rem;
    font-weight: 900;
    color: var(--ec-hero-label);
    letter-spacing: 0.05em;
  }

  .ec-progress-track {
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    position: relative;
    overflow: hidden;
  }

  .ec-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--n-error) 0%, var(--n-cyan) 100%);
    width: 0%;
    transition: width 0.8s ease-out;
  }

  .ec-marker {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--n-primary-on);
    z-index: 2;
  }

  .ec-stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .ec-stat-card {
    background: var(--n-bg-muted);
    border: 1px solid var(--n-border);
    border-radius: 0.75rem;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
  }

  .ec-stat-label {
    font-size: 0.6rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--n-text-muted);
    letter-spacing: 0.06em;
  }

  .ec-stat-value {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--n-text);
  }

  .ec-stat-value.danger {
    color: var(--n-error);
  }

  .ec-stat-card.hidden {
    display: none;
  }

  .ec-inverter-card {
    padding: 1.5rem;
    background: var(--n-bg-muted);
    border: 1px dashed var(--n-border);
    border-radius: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
  }

  .ec-inverter-header {
    font-size: 0.75rem;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--n-cyan);
    letter-spacing: 0.06em;
  }

  .ec-inverter-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: center;
  }

  .ec-inverter-label {
    font-size: 0.65rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--n-text-muted);
    margin-bottom: 0.3rem;
  }

  .ec-inverter-value {
    font-size: 2rem;
    font-weight: 900;
    color: var(--n-cyan);
  }

  .ec-inverter-unit {
    font-size: 0.85rem;
    color: var(--n-text-muted);
    font-weight: 700;
  }

  .ec-warning-bar {
    background: color-mix(in srgb, var(--n-error), transparent 90%);
    padding: 0.8rem 1.2rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--n-error);
  }

  .ec-warning-icon {
    font-size: 1rem;
    flex-shrink: 0;
  }

  @media (max-width: 800px) {
    .ec-main-container {
      grid-template-columns: 1fr;
    }

    .ec-sidebar-inputs {
      border-right: none;
      border-bottom: 1px solid var(--n-border);
    }
  }

  @media (max-width: 480px) {
    .ec-main-value {
      font-size: 2.8rem;
    }

    .ec-stats-grid {
      grid-template-columns: 1fr;
    }
  }