:root {
      --calc-primary: #0284C7;
      --calc-primary-light: #e0f2fe;
      --calc-primary-dark: #0369a1;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --bg-light: #f8fafc;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    }
    @keyframes wt-fade-in {
      from { opacity: 0; transform: translateY(15px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .loan-calc-wrapper {
      max-width: 1100px;
      margin: 6rem auto 4rem;
      padding: 0 var(--pad);
      animation: wt-fade-in 0.6s var(--ease);
    }
    .calc-card {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: 32px;
      box-shadow: var(--shadow-lg);
      overflow: hidden;
      margin-bottom: 4rem;
      transform: translateZ(0);
    }
    .calc-main-grid {
      display: grid;
      grid-template-columns: 420px 1fr;
      min-height: 550px;
    }
    @media (max-width: 960px) {
      .calc-main-grid {
        grid-template-columns: 1fr;
      }
    }
    .calc-sidebar {
      padding: 3rem;
      background: var(--bg-light);
      border-right: 1px solid var(--border-color);
    }
    .calc-content {
      padding: 3rem;
      display: flex;
      flex-direction: column;
      gap: 3rem;
    }
    .input-field {
      margin-bottom: 2.5rem;
    }
    .input-label-row {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 1rem;
    }
    .input-label-row label {
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
    }
    .input-value-box {
      background: white;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 0.6rem 1rem;
      font-weight: 700;
      color: var(--calc-primary);
      min-width: 120px;
      text-align: right;
      display: flex;
      align-items: center;
      gap: 4px;
      box-shadow: var(--shadow-sm);
    }
    .input-value-box input {
      border: none;
      background: transparent;
      font-family: inherit;
      font-weight: inherit;
      color: inherit;
      width: 100%;
      text-align: right;
      outline: none;
      font-size: 1.1rem;
    }
    .results-summary {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
      padding-bottom: 2.5rem;
      border-bottom: 1px solid var(--border-color);
    }
    @media (max-width: 600px) {
      .results-summary {
        grid-template-columns: 1fr;
      }
    }
    .summary-item {
      text-align: left;
    }
    .summary-label {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--text-muted);
      margin-bottom: 0.75rem;
    }
    .summary-value {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1;
    }
    .summary-value.primary {
      color: var(--calc-primary);
    }
    .chart-container {
      height: 250px;
      position: relative;
    }
    .tax-breakdown {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.5rem;
    }
    .breakdown-item {
      background: var(--bg-light);
      padding: 1.5rem;
      border-radius: 16px;
      border: 1px solid var(--border-color);
    }
    .breakdown-label {
      font-size: 0.75rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 0.5rem;
    }
    .breakdown-value {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
    }
    .seo-content {
      margin-top: 6rem;
      padding-top: 4rem;
      border-top: 1px solid var(--border-color);
      display: grid;
      grid-template-columns: 1fr 360px;
      gap: 5rem;
    }
    @media (max-width: 960px) {
      .seo-content { grid-template-columns: 1fr; }
    }
    .article-text h2 {
      font-family: var(--ff-serif);
      font-size: 2.5rem;
      margin-bottom: 2rem;
      color: var(--text-main);
    }
    .article-text h3 {
      font-size: 1.4rem;
      font-weight: 700;
      margin: 2.5rem 0 1rem;
      color: var(--text-main);
    }
    .article-text p {
      font-size: 1.1rem;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 1.5rem;
    }
    .article-text ul {
      margin: 0 0 1.5rem 1.5rem;
    }
    .article-text ul li {
      font-size: 1.05rem;
      line-height: 1.8;
      color: var(--text-muted);
      margin-bottom: 0.5rem;
    }
    .sidebar-guide {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      border-radius: 24px;
      padding: 2.5rem;
      height: fit-content;
      position: sticky;
      top: 100px;
    }
    .sidebar-guide h4 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 1.5rem;
      color: var(--text-main);
    }
    .guide-item {
      margin-bottom: 1.75rem;
    }
    .guide-item strong {
      display: block;
      font-size: 0.95rem;
      margin-bottom: 0.4rem;
      color: var(--calc-primary);
    }
    .guide-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin: 0;
    }