/* Instagram Engagement Calculator — Custom Styles */

    .calc-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .calc-form .input-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .calc-form .input-group.full-width {
      grid-column: 1 / -1;
    }

    .calc-form label {
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--color-text-secondary);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .calc-form label .optional-tag {
      font-weight: 500;
      text-transform: none;
      letter-spacing: 0;
      color: var(--color-text-muted);
      font-size: 0.75rem;
    }

    .calc-form input[type="number"] {
      padding: 12px 16px;
      border: 1px solid var(--color-border);
      border-radius: var(--radius-sm);
      font-family: var(--font-body);
      font-size: 1rem;
      color: var(--color-text);
      background: var(--color-surface);
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
      outline: none;
      -moz-appearance: textfield;
    }

    .calc-form input[type="number"]::-webkit-inner-spin-button,
    .calc-form input[type="number"]::-webkit-outer-spin-button {
      -webkit-appearance: none;
      margin: 0;
    }

    .calc-form input[type="number"]:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 3px var(--color-primary-light);
    }

    .calc-form input[type="number"]::placeholder {
      color: var(--color-text-muted);
    }

    .calc-btn-row {
      grid-column: 1 / -1;
      display: flex;
      gap: 12px;
      margin-top: 4px;
    }

    .btn-calculate {
      flex: 1;
      padding: 14px 32px;
      font-size: 1rem;
    }

    .btn-reset {
      padding: 14px 24px;
      font-size: 1rem;
    }

    /* Results Section */
    .results-section {
      display: none;
      margin-top: 32px;
      padding-top: 28px;
      border-top: 1px solid var(--color-border-light);
      animation: fadeInUp 0.4s cubic-bezier(0.16, 1, 0.3, 1) both;
    }

    .results-section.visible {
      display: block;
    }

    .results-header {
      text-align: center;
      margin-bottom: 28px;
    }

    .engagement-rate-display {
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      padding: 28px 48px;
      border-radius: var(--radius-lg);
      min-width: 220px;
    }

    .engagement-rate-display .rate-label {
      font-size: 0.75rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      opacity: 0.85;
    }

    .engagement-rate-display .rate-value {
      font-size: 3.2rem;
      font-weight: 700;
      line-height: 1;
      font-family: var(--font-body);
      letter-spacing: -0.03em;
    }

    .engagement-rate-display .rate-rating {
      font-size: 1rem;
      font-weight: 600;
      margin-top: 2px;
    }

    /* Color themes for rate display */
    .rate-low {
      background: var(--color-error-bg);
      color: #991b1b;
    }
    .rate-low .rate-value { color: var(--color-error); }

    .rate-below-avg {
      background: var(--color-warning-bg);
      color: #92400e;
    }
    .rate-below-avg .rate-value { color: #d97706; }

    .rate-average {
      background: var(--color-success-bg);
      color: #065f46;
    }
    .rate-average .rate-value { color: var(--color-success); }

    .rate-good {
      background: #ecfdf5;
      color: #065f46;
    }
    .rate-good .rate-value { color: #059669; }

    .rate-excellent {
      background: linear-gradient(135deg, #ecfdf5, #d1fae5);
      color: #065f46;
    }
    .rate-excellent .rate-value { color: #047857; }

    /* Benchmark Meter */
    .benchmark-section {
      margin: 24px 0;
      padding: 20px 24px;
      background: var(--color-bg);
      border: 1px solid var(--color-border-light);
      border-radius: var(--radius-md);
    }

    .benchmark-title {
      font-size: 0.8rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--color-text-muted);
      margin-bottom: 16px;
    }

    .benchmark-meter {
      position: relative;
      height: 14px;
      border-radius: 7px;
      background: linear-gradient(90deg, #fca5a5 0%, #fcd34d 25%, #86efac 50%, #34d399 75%, #10b981 100%);
      overflow: visible;
      margin-bottom: 8px;
    }

    .benchmark-marker {
      position: absolute;
      top: -6px;
      width: 4px;
      height: 26px;
      background: var(--color-text);
      border-radius: 2px;
      transform: translateX(-50%);
      transition: left 0.6s cubic-bezier(0.16, 1, 0.3, 1);
      box-shadow: 0 1px 4px rgba(0,0,0,0.2);
    }

    .benchmark-marker::after {
      content: attr(data-value);
      position: absolute;
      top: -24px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 0.75rem;
      font-weight: 700;
      font-family: var(--font-mono);
      color: var(--color-text);
      white-space: nowrap;
    }

    .benchmark-labels {
      display: flex;
      justify-content: space-between;
      font-size: 0.7rem;
      color: var(--color-text-muted);
      margin-top: 4px;
    }

    .benchmark-context {
      margin-top: 14px;
      font-size: 0.88rem;
      color: var(--color-text-secondary);
      line-height: 1.6;
    }

    /* Breakdown Cards */
    .breakdown-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      margin-top: 24px;
    }

    .breakdown-card {
      padding: 16px;
      background: var(--color-bg);
      border: 1px solid var(--color-border-light);
      border-radius: var(--radius-sm);
      text-align: center;
    }

    .breakdown-card .breakdown-icon {
      font-size: 1.3rem;
      margin-bottom: 6px;
    }

    .breakdown-card .breakdown-label {
      font-size: 0.7rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--color-text-muted);
      margin-bottom: 4px;
    }

    .breakdown-card .breakdown-value {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--color-text);
      font-family: var(--font-mono);
    }

    .breakdown-card .breakdown-count {
      font-size: 0.75rem;
      color: var(--color-text-muted);
      margin-top: 2px;
    }

    /* Tips Section */
    .tips-section {
      margin-top: 28px;
      padding: 20px 24px;
      background: var(--color-primary-light);
      border: 1px solid var(--color-primary-subtle);
      border-radius: var(--radius-md);
    }

    .tips-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--color-primary);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .tips-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .tips-list li {
      font-size: 0.88rem;
      color: var(--color-text-secondary);
      line-height: 1.6;
      padding-left: 20px;
      position: relative;
    }

    .tips-list li::before {
      content: '';
      position: absolute;
      left: 0;
      top: 9px;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-primary);
      opacity: 0.5;
    }

    /* Responsive */
    @media (max-width: 768px) {
      .calc-form {
        grid-template-columns: 1fr;
      }

      .breakdown-grid {
        grid-template-columns: 1fr 1fr;
      }

      .engagement-rate-display {
        padding: 24px 36px;
      }

      .engagement-rate-display .rate-value {
        font-size: 2.5rem;
      }
    }

    @media (max-width: 480px) {
      .breakdown-grid {
        grid-template-columns: 1fr;
      }

      .calc-btn-row {
        flex-direction: column;
      }

      .btn-reset {
        width: 100%;
      }
    }