:root {
      color-scheme: dark;
      --bg-gradient: radial-gradient(circle at top left, #1e2330, #10131c 55%, #0a0c12 100%);
      --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
      --font-heading: "Clash Display", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
      --card-bg: rgba(20, 24, 35, 0.85);
      --card-border: rgba(255, 255, 255, 0.08);
      --card-border-gradient: linear-gradient(
        135deg,
        rgba(77, 163, 255, 0.6),
        rgba(149, 114, 255, 0.45)
      );
      --card-surface-gradient: linear-gradient(
        160deg,
        rgba(255, 255, 255, 0.08),
        rgba(255, 255, 255, 0.02)
      );
      --card-shadow: 0 20px 40px rgba(0, 0, 0, 0.45);
      --accent: #4da3ff;
      --text-primary: #f5f7fb;
      --text-muted: #b1b7c7;
      --field-bg: rgba(7, 9, 14, 0.75);
      --field-border: rgba(255, 255, 255, 0.15);
      --field-output-bg: rgba(77, 163, 255, 0.18);
      --field-output-border: rgba(77, 163, 255, 0.5);
      --field-output-color: #e5f1ff;
      --table-header-bg: rgba(255, 255, 255, 0.04);
      --table-header-text: var(--text-muted);
      --table-row-border: rgba(255, 255, 255, 0.07);
      --row-header-bg: rgba(255, 255, 255, 0.02);
      --price-line-bg: rgba(255, 255, 255, 0.03);
      --price-line-border: rgba(255, 255, 255, 0.05);
      --price-buffer-bg: rgba(77, 163, 255, 0.08);
      --price-buffer-border: rgba(77, 163, 255, 0.25);
      --breakdown-color-vat: #f97316;
      --breakdown-color-variable: #8b5cf6;
      --breakdown-color-fixed: #38bdf8;
      --breakdown-color-tax: #ef4444;
      --breakdown-color-net: #22c55e;
      --button-bg: #f1f5ff;
      --button-color: #0c111d;
      --button-shadow: rgba(0, 0, 0, 0.3);
      --secondary-button-bg: rgba(77, 163, 255, 0.15);
      --secondary-button-border: rgba(77, 163, 255, 0.45);
      --secondary-button-hover-bg: rgba(77, 163, 255, 0.25);
      --info-bg: rgba(77, 163, 255, 0.15);
      --info-border: rgba(77, 163, 255, 0.35);
      --info-hover-bg: rgba(77, 163, 255, 0.25);
      --info-hover-border: rgba(77, 163, 255, 0.55);
      --tooltip-bg: rgba(12, 16, 26, 0.95);
      --tooltip-color: var(--text-primary);
      --tooltip-shadow: 0 12px 24px rgba(0, 0, 0, 0.35);
      --toggle-track: rgba(255, 255, 255, 0.25);
      --toggle-track-border: rgba(255, 255, 255, 0.35);
      --toggle-thumb: var(--accent);
      --toggle-thumb-shadow: rgba(0, 0, 0, 0.35);
      --focus-ring: rgba(77, 163, 255, 0.25);
      --focus-outline: rgba(77, 163, 255, 0.55);
      --inactive-bg: rgba(255, 76, 96, 0.12);
      --inactive-border: rgba(255, 76, 96, 0.45);
      --inactive-text: #ff93a6;
      --inactive-strong: #ffb7c3;
      --active-bg: rgba(77, 163, 255, 0.12);
      --active-border: rgba(77, 163, 255, 0.45);
      --price-out-of-range: #ff7b7b;
      --price-acceptable-bg: rgba(34, 197, 94, 0.18);
      --price-acceptable-border: rgba(34, 197, 94, 0.5);
      --price-acceptable-hover: rgba(34, 197, 94, 0.28);
    }

    body[data-theme="light"] {
      color-scheme: light;
      --bg-gradient: radial-gradient(circle at top left, #eff4ff, #dde7ff 55%, #d4e0ff 100%);
      --font-body: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
      --font-heading: "Clash Display", "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
      --card-bg: rgba(255, 255, 255, 0.92);
      --card-border: rgba(15, 23, 42, 0.08);
      --card-border-gradient: linear-gradient(
        135deg,
        rgba(37, 99, 235, 0.35),
        rgba(59, 130, 246, 0.15)
      );
      --card-surface-gradient: linear-gradient(
        160deg,
        rgba(255, 255, 255, 0.95),
        rgba(249, 250, 255, 0.85)
      );
      --card-shadow: 0 20px 40px rgba(15, 23, 42, 0.12);
      --accent: #2563eb;
      --text-primary: #111827;
      --text-muted: #4b5563;
      --field-bg: rgba(255, 255, 255, 0.85);
      --field-border: rgba(15, 23, 42, 0.14);
      --field-output-bg: rgba(37, 99, 235, 0.14);
      --field-output-border: rgba(37, 99, 235, 0.35);
      --field-output-color: #0b162d;
      --table-header-bg: rgba(37, 99, 235, 0.08);
      --table-header-text: #1f2937;
      --table-row-border: rgba(15, 23, 42, 0.08);
      --row-header-bg: rgba(226, 232, 240, 0.6);
      --price-line-bg: rgba(15, 23, 42, 0.04);
      --price-line-border: rgba(15, 23, 42, 0.1);
      --price-buffer-bg: rgba(37, 99, 235, 0.12);
      --price-buffer-border: rgba(37, 99, 235, 0.28);
      --breakdown-color-vat: #ea580c;
      --breakdown-color-variable: #7c3aed;
      --breakdown-color-fixed: #2563eb;
      --breakdown-color-tax: #dc2626;
      --breakdown-color-net: #16a34a;
      --button-bg: #1d4ed8;
      --button-color: #f8fafc;
      --button-shadow: rgba(29, 78, 216, 0.3);
      --secondary-button-bg: rgba(37, 99, 235, 0.12);
      --secondary-button-border: rgba(37, 99, 235, 0.3);
      --secondary-button-hover-bg: rgba(37, 99, 235, 0.22);
      --info-bg: rgba(37, 99, 235, 0.12);
      --info-border: rgba(37, 99, 235, 0.32);
      --info-hover-bg: rgba(37, 99, 235, 0.2);
      --info-hover-border: rgba(37, 99, 235, 0.45);
      --tooltip-bg: rgba(15, 23, 42, 0.95);
      --tooltip-color: #f8fafc;
      --tooltip-shadow: 0 18px 36px rgba(15, 23, 42, 0.24);
      --toggle-track: rgba(15, 23, 42, 0.12);
      --toggle-track-border: rgba(15, 23, 42, 0.22);
      --toggle-thumb: #1d4ed8;
      --toggle-thumb-shadow: rgba(15, 23, 42, 0.25);
      --focus-ring: rgba(37, 99, 235, 0.28);
      --focus-outline: rgba(37, 99, 235, 0.55);
      --inactive-bg: rgba(239, 68, 68, 0.12);
      --inactive-border: rgba(220, 38, 38, 0.35);
      --inactive-text: #c53030;
      --inactive-strong: #e53e3e;
      --active-bg: rgba(37, 99, 235, 0.12);
      --active-border: rgba(37, 99, 235, 0.35);
      --price-out-of-range: #b91c1c;
      --price-acceptable-bg: rgba(34, 197, 94, 0.14);
      --price-acceptable-border: rgba(34, 197, 94, 0.32);
      --price-acceptable-hover: rgba(34, 197, 94, 0.22);
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      min-height: 100vh;
      font-family: var(--font-body);
      line-height: 1.65;
      background: var(--bg-gradient);
      color: var(--text-primary);
      display: flex;
      flex-direction: column;
      transition: background 0.4s ease, color 0.4s ease;
      overflow-x: hidden;
      touch-action: pan-y;
    }

    body.dialog-open {
      overflow: hidden;
    }

    body[data-theme="dark"] {
      color-scheme: dark;
    }

    h1,
    h2 {
      font-family: var(--font-heading);
      font-weight: 500;
      letter-spacing: -0.01em;
      line-height: 1.15;
      margin: 0;
    }

    a {
      color: inherit;
    }

    .visually-hidden {
      position: absolute !important;
      width: 1px;
      height: 1px;
      padding: 0;
      margin: -1px;
      overflow: hidden;
      clip: rect(0 0 0 0);
      white-space: nowrap;
      border: 0;
    }

    .top-nav {
      display: flex;
      justify-content: flex-end;
      gap: 12px;
      padding: 8px 0 0;
    }

    .top-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 8px 14px;
      border-radius: 999px;
      border: 1px solid var(--secondary-button-border);
      background: var(--secondary-button-bg);
      color: var(--text-primary);
      font-size: 0.95rem;
      text-decoration: none;
      transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    }

    .top-link::before {
      content: "📘";
      font-size: 1rem;
    }

    .top-link:hover,
    .top-link:focus-visible {
      background: var(--secondary-button-hover-bg);
      border-color: var(--secondary-button-border);
      transform: translateY(-1px);
      outline: none;
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    .readme-dialog[hidden] {
      display: none;
    }

    .readme-dialog {
      position: fixed;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      z-index: 1000;
    }

    .readme-dialog__backdrop {
      position: absolute;
      inset: 0;
      background: rgba(0, 0, 0, 0.55);
    }

    .readme-dialog__content {
      position: relative;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 18px;
      box-shadow: 0 35px 70px var(--card-shadow);
      max-width: min(960px, 92vw);
      max-height: 90vh;
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }

    .readme-dialog__header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 18px 24px;
      border-bottom: 1px solid var(--table-row-border);
      background: var(--row-header-bg);
    }

    .readme-dialog__close {
      appearance: none;
      background: transparent;
      border: none;
      color: var(--text-muted);
      font-size: 1.5rem;
      cursor: pointer;
      padding: 6px;
      border-radius: 50%;
      line-height: 1;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .readme-dialog__close:hover,
    .readme-dialog__close:focus-visible {
      background: var(--secondary-button-bg);
      color: var(--text-primary);
      outline: none;
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    .readme-dialog__body {
      padding: 24px;
      overflow-y: auto;
      line-height: 1.6;
      color: var(--text-primary);
      background: var(--field-output-bg);
    }

    .readme-dialog__body h1,
    .readme-dialog__body h2,
    .readme-dialog__body h3,
    .readme-dialog__body h4,
    .readme-dialog__body h5,
    .readme-dialog__body h6 {
      color: var(--text-primary);
      margin-top: 1.4em;
    }

    .readme-dialog__body p,
    .readme-dialog__body li {
      color: var(--text-muted);
    }

    .readme-dialog__body pre {
      background: rgba(0, 0, 0, 0.4);
      padding: 12px 14px;
      border-radius: 12px;
      overflow-x: auto;
      border: 1px solid var(--table-row-border);
    }

    .readme-dialog__body code {
      font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    }

    .readme-dialog__body a {
      color: var(--accent);
    }

    .readme-dialog__body ul,
    .readme-dialog__body ol {
      padding-left: 1.25em;
    }

    .readme-dialog__body table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.5em 0;
    }

    .readme-dialog__body th,
    .readme-dialog__body td {
      border: 1px solid var(--table-row-border);
      padding: 8px 12px;
    }

    .readme-dialog__body blockquote {
      border-left: 3px solid var(--accent);
      margin: 1.2em 0;
      padding: 0.5em 1em;
      color: var(--text-muted);
      background: rgba(0, 0, 0, 0.25);
      border-radius: 12px;
    }

    .readme-status {
      margin: 0;
      color: var(--text-muted);
    }

    .readme-status--error {
      color: var(--inactive-strong);
    }

    @media (max-width: 720px) {
      .top-nav {
        justify-content: center;
      }

      .top-link {
        width: 100%;
        justify-content: center;
      }

      .readme-dialog__content {
        width: 92vw;
        max-height: 92vh;
      }
    }

    .accounting-dialog[hidden] {
      display: none;
    }

    .accounting-dialog {
      position: fixed;
      inset: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 24px;
      z-index: 1100;
    }

    .accounting-dialog__backdrop {
      position: absolute;
      inset: 0;
      background: rgba(0, 0, 0, 0.55);
    }

    .accounting-dialog__content {
      position: relative;
      width: min(520px, 92vw);
      max-height: 92vh;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 18px;
      box-shadow: 0 35px 70px var(--card-shadow);
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }

    .accounting-dialog__header {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      gap: 18px;
      padding: 20px 24px 16px;
      border-bottom: 1px solid var(--table-row-border);
      background: var(--row-header-bg);
    }

    .accounting-dialog__title {
      margin: 0;
      font-size: 1.35rem;
    }

    .accounting-dialog__subtitle {
      margin: 6px 0 0;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.5;
    }

    .accounting-dialog__close {
      appearance: none;
      background: transparent;
      border: none;
      color: var(--text-muted);
      font-size: 1.5rem;
      cursor: pointer;
      padding: 6px;
      border-radius: 50%;
      line-height: 1;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .accounting-dialog__close:hover,
    .accounting-dialog__close:focus-visible {
      background: var(--secondary-button-bg);
      color: var(--text-primary);
      outline: none;
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    .accounting-dialog__form {
      flex: 1;
      padding: 24px;
      display: flex;
      flex-direction: column;
      gap: 18px;
      overflow-y: auto;
    }

    .accounting-dialog__field label {
      display: block;
      font-weight: 600;
      margin-bottom: 6px;
    }

    .accounting-dialog__field input {
      width: 100%;
      border-radius: 12px;
      border: 1px solid var(--field-border);
      background: var(--field-bg);
      color: var(--text-primary);
      font-size: 1rem;
      padding: 10px 12px;
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    }

    .accounting-dialog__field input:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--focus-ring);
      background: var(--field-output-bg);
    }

    .accounting-dialog__note {
      margin: 0;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.5;
    }

    .accounting-dialog__error {
      margin: 0;
      min-height: 1.1em;
      color: var(--price-out-of-range);
      font-weight: 600;
      font-size: 0.95rem;
    }

    .accounting-dialog__actions {
      margin-top: auto;
      display: flex;
      justify-content: flex-end;
      gap: 12px;
      flex-wrap: wrap;
    }

    .accounting-dialog__actions button {
      min-width: 120px;
    }

    @media (max-width: 720px) {
      .accounting-dialog {
        padding: 16px;
      }

      .accounting-dialog__content {
        width: min(480px, 96vw);
      }

      .accounting-dialog__form {
        padding: 20px;
      }
    }

    .lesson-breakdown-dialog[hidden] {
      display: none;
    }

    .lesson-breakdown-dialog {
      position: fixed;
      inset: 0;
      z-index: 950;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: clamp(16px, 4vw, 32px);
    }

    .lesson-breakdown-dialog__backdrop {
      position: absolute;
      inset: 0;
      background: rgba(8, 11, 20, 0.6);
      backdrop-filter: blur(6px);
    }

    .lesson-breakdown-dialog__content {
      position: relative;
      z-index: 1;
      width: min(960px, 100%);
      max-height: 92vh;
      overflow: auto;
      -webkit-overflow-scrolling: touch;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 20px;
      box-shadow: var(--card-shadow);
      padding: clamp(20px, 3vw, 28px);
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .lesson-breakdown-dialog__header {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 16px;
    }

    .lesson-breakdown-dialog__header h2 {
      margin: 0;
      font-size: clamp(1.4rem, 2vw, 1.65rem);
    }

    .lesson-breakdown-dialog__variant {
      margin: 6px 0 0;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .lesson-breakdown-dialog__summary {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .lesson-breakdown-dialog__price {
      margin: 0;
      font-size: clamp(1.4rem, 2.4vw, 1.75rem);
      font-weight: 600;
    }

    .lesson-breakdown-dialog__meta,
    .lesson-breakdown-dialog__total {
      margin: 0;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .lesson-breakdown-dialog__body {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
      gap: clamp(18px, 3vw, 28px);
    }

    .lesson-breakdown-dialog__table-wrapper {
      overflow: auto;
      border-radius: 16px;
      border: 1px solid var(--table-row-border);
      background: var(--field-output-bg);
    }

    .lesson-breakdown-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 320px;
    }

    .lesson-breakdown-table thead th {
      position: sticky;
      top: 0;
      background: var(--table-header-bg);
      color: var(--table-header-text);
      text-transform: uppercase;
      letter-spacing: 0.04em;
      font-size: 0.75rem;
      padding: 12px;
    }

    .lesson-breakdown-table th,
    .lesson-breakdown-table td {
      padding: 12px 16px;
      border-bottom: 1px solid var(--table-row-border);
      font-size: 0.95rem;
    }

    .lesson-breakdown-table tbody th {
      text-align: left;
      font-weight: 600;
    }

    .lesson-breakdown-table tbody td {
      text-align: right;
      font-variant-numeric: tabular-nums;
    }

    .lesson-breakdown-table tbody tr:last-child th,
    .lesson-breakdown-table tbody tr:last-child td {
      border-bottom: none;
    }

    .lesson-breakdown-dialog__chart {
      display: flex;
      flex-direction: column;
      align-items: stretch;
      gap: 16px;
    }

    .lesson-breakdown-dialog__chart-graphic {
      width: clamp(160px, 22vw, 200px);
      aspect-ratio: 1 / 1;
      border-radius: 50%;
      background: var(--price-line-bg);
      border: 1px solid var(--price-line-border);
      margin: 0 auto;
      position: relative;
      transition: background 0.3s ease;
    }

    .lesson-breakdown-dialog__chart-graphic::after {
      content: "";
      position: absolute;
      inset: 24%;
      border-radius: 50%;
      background: var(--card-bg);
      border: 1px solid var(--card-border);
    }

    .lesson-breakdown-dialog__legend {
      list-style: none;
      margin: 0;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .lesson-breakdown-dialog__legend-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.9rem;
    }

    .lesson-breakdown-dialog__legend-swatch {
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--swatch-color, var(--accent));
      box-shadow: 0 0 0 2px rgba(0, 0, 0, 0.2);
      flex: 0 0 auto;
    }

    .lesson-breakdown-dialog__legend-label {
      flex: 1 1 auto;
      color: var(--text-muted);
    }

    .lesson-breakdown-dialog__legend-value {
      flex: 0 0 auto;
      font-variant-numeric: tabular-nums;
      font-weight: 600;
    }

    .lesson-breakdown-dialog__close {
      appearance: none;
      background: transparent;
      border: none;
      color: var(--text-muted);
      font-size: 1.5rem;
      cursor: pointer;
      padding: 6px;
      border-radius: 50%;
      line-height: 1;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .lesson-breakdown-dialog__close:hover,
    .lesson-breakdown-dialog__close:focus-visible {
      background: var(--secondary-button-bg);
      color: var(--text-primary);
      outline: none;
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    @media (max-width: 900px) {
      .lesson-breakdown-dialog__body {
        grid-template-columns: 1fr;
      }

      .lesson-breakdown-dialog__chart {
        align-items: center;
      }
    }

    @media (max-width: 540px) {
      .lesson-breakdown-dialog__content {
        border-radius: 16px;
        padding: 18px;
      }

      .lesson-breakdown-dialog__body {
        gap: 18px;
      }

      .lesson-breakdown-dialog__table-wrapper {
        border-radius: 12px;
      }
    }

    .page {
      position: relative;
      overflow: visible;
      isolation: isolate;
      flex: 1;
      display: flex;
      flex-direction: column;
      padding: clamp(16px, 3vw, 32px);
      padding-top: calc(
        clamp(16px, 3vw, 32px) + env(safe-area-inset-top, 0px)
      );
      gap: clamp(16px, 2vw, 24px);
    }

    .page::before {
      content: "";
      position: absolute;
      inset: -40% -20% -60%;
      background: radial-gradient(
          circle at 30% 20%,
          rgba(77, 163, 255, 0.25),
          transparent 55%
        ),
        radial-gradient(circle at 70% 30%, rgba(149, 114, 255, 0.2), transparent 50%),
        radial-gradient(circle at 50% 80%, rgba(77, 163, 255, 0.18), transparent 55%);
      opacity: 0.45;
      filter: blur(0);
      transform: scale(1.05);
      animation: page-backdrop-drift 26s ease-in-out infinite;
      pointer-events: none;
      z-index: -1;
    }

    @keyframes page-backdrop-drift {
      0% {
        transform: scale(1.05) translate3d(-6%, -3%, 0) rotate(0deg);
      }

      50% {
        transform: scale(1.05) translate3d(8%, 6%, 0) rotate(5deg);
      }

      100% {
        transform: scale(1.05) translate3d(-6%, -3%, 0) rotate(0deg);
      }
    }

    @media (prefers-reduced-motion: reduce) {
      .page::before {
        animation: none;
      }
    }

    header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .persist-controls {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 14px 16px;
      border-radius: 14px;
      border: 1px solid var(--field-border);
      background: var(--field-output-bg);
      width: 100%;
    }

    .persist-controls__primary {
      display: flex;
      flex-direction: column;
      gap: 6px;
      flex: 1 1 60%;
    }

    .persist-controls__actions {
      display: flex;
      flex: 0 0 auto;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .persist-checkbox {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-weight: 600;
      cursor: pointer;
    }

    .persist-checkbox input[type="checkbox"] {
      width: 1.1rem;
      height: 1.1rem;
      accent-color: var(--accent);
    }

    .persist-description {
      margin: 0;
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .persist-controls button {
      flex: 0 0 auto;
      min-width: 150px;
    }

    .data-portability {
      display: flex;
      flex-wrap: wrap;
      align-items: flex-start;
      gap: 16px;
      margin-top: 18px;
      padding: 16px;
      border-radius: 14px;
      border: 1px solid var(--field-border);
      background: var(--field-bg);
    }

    .data-portability__text {
      flex: 1 1 260px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .data-portability__title {
      margin: 0;
      font-weight: 600;
    }

    .data-portability__description,
    .data-portability__version {
      margin: 0;
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .data-portability__actions {
      display: flex;
      flex: 0 0 auto;
      gap: 12px;
      flex-wrap: wrap;
    }

    .header-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 9px 16px;
      border-radius: 999px;
      border: 1px solid var(--secondary-button-border);
      background: var(--secondary-button-bg);
      color: inherit;
      font-weight: 500;
      text-decoration: none;
      transition: background 0.25s ease, border-color 0.25s ease, transform 0.2s ease;
    }

    .header-link:hover,
    .header-link:focus-visible {
      background: var(--secondary-button-hover-bg);
      border-color: var(--secondary-button-border);
      transform: translateY(-1px);
    }

    .header-link:focus-visible {
      outline: 3px solid var(--focus-outline);
      outline-offset: 2px;
    }

    .header-text {
      flex: 1 1 340px;
      min-width: 240px;
      max-width: 720px;
    }

    .header-text p {
      color: var(--text-muted);
      margin: 8px 0 0;
    }

    .layout {
      display: flex;
      gap: 24px;
      flex: 1;
      min-height: 0;
    }

    .card {
      position: relative;
      z-index: 0;
      border-radius: 18px;
      padding: clamp(16px, 2vw, 24px);
      box-shadow: var(--card-shadow);
      backdrop-filter: blur(16px);
      overflow: visible;
      transform: translateY(0);
      transition: transform 0.35s ease, box-shadow 0.4s ease, color 0.4s ease, background 0.4s ease;
    }

    .card::before,
    .card::after {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: inherit;
      pointer-events: none;
    }

    .card::before {
      padding: 1px;
      background: var(--card-border-gradient);
      opacity: 0.75;
      z-index: -2;
      transition: opacity 0.45s ease;
      -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
      -webkit-mask-composite: xor;
      mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
      mask-composite: exclude;
    }

    .card::after {
      z-index: -1;
      background: var(--card-bg);
      background-image: var(--card-surface-gradient);
      opacity: 0.95;
      transition: opacity 0.45s ease;
    }

    .card:hover,
    .card:focus-within {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow), 0 18px 36px rgba(77, 163, 255, 0.12);
      z-index: 2;
    }

    .card:hover::before,
    .card:focus-within::before {
      opacity: 1;
    }

    .card:hover::after,
    .card:focus-within::after {
      opacity: 1;
    }

    .privacy-info {
      display: flex;
      flex-direction: column;
      gap: 16px;
      line-height: 1.6;
    }

    .privacy-info h2,
    .privacy-info h3 {
      margin: 0;
    }

    .privacy-info h3 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-muted);
    }

    .privacy-info ol {
      margin: 0;
      padding-left: 1.2rem;
      display: grid;
      gap: 12px;
    }

    .privacy-info li {
      padding-left: 4px;
    }

    .controls {
      flex: 0 0 320px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .controls .control-sections,
    .controls .control-section {
      border: none;
      padding: 0;
      margin: 0;
    }

    .controls .control-sections {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .controls .control-section {
      border: 1px solid var(--card-border);
      border-radius: 16px;
      background: var(--card-surface-gradient);
      padding: 16px 18px 18px;
    }

    .section-legend {
      margin: 0;
      padding: 0;
    }

    .section-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 0 6px;
      width: 100%;
    }

    .section-title {
      font-size: 0.9rem;
      font-weight: 600;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--text-muted);
      flex: 1 1 auto;
      min-width: 0;
    }

    .section-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.75rem;
      height: 1.75rem;
      padding: 0;
      border-radius: 50%;
      border: 1px solid var(--secondary-button-border);
      background: var(--secondary-button-bg);
      color: var(--text-primary);
      box-shadow: none;
      transform: none;
    }

    .section-toggle .toggle-icon {
      width: 0.75rem;
      height: 0.75rem;
      transition: transform 0.2s ease;
    }

    .section-toggle[aria-expanded="false"] .toggle-icon {
      transform: rotate(-90deg);
    }

    .section-toggle:hover,
    .section-toggle:focus-visible {
      background: var(--secondary-button-hover-bg);
      border-color: var(--secondary-button-border);
      color: var(--text-primary);
      box-shadow: none;
      transform: none;
    }

    .section-toggle--top {
      flex: 0 0 auto;
    }

    .section-toggle--bottom {
      margin-top: 8px;
    }

    .section-footer {
      display: flex;
      justify-content: flex-end;
      margin-top: 4px;
    }

    .controls .control-section.collapsed .section-body {
      display: none;
    }

    .controls .control-section.collapsed .section-footer {
      display: none;
    }

    .controls .control-section .section-body {
      display: flex;
      flex-direction: column;
      gap: 16px;
      margin-top: 12px;
    }

    .control-group {
      display: flex;
      flex-direction: column;
      gap: 16px;
      padding: 0;
      border-radius: 14px;
      border: 1px solid transparent;
      background: transparent;
      transition: border-color 0.3s ease, background-color 0.3s ease, padding 0.3s ease;
    }

    .desired-income-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .desired-income-actions .secondary {
      flex: 1 1 200px;
      min-width: 160px;
      justify-content: center;
    }

    .acceptable-income-group {
      gap: 14px;
      padding: 16px;
      background: var(--field-bg);
      border: 1px solid var(--field-border);
    }

    .acceptable-income-header {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 8px;
    }

    .acceptable-income-header .label-text {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-primary);
    }

    .acceptable-income-header .sub-label {
      font-size: 0.7rem;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--text-muted);
    }

    .acceptable-income-basis {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .acceptable-income-basis__option {
      position: relative;
      display: inline-flex;
      align-items: center;
      cursor: pointer;
    }

    .acceptable-income-basis__option input {
      position: absolute;
      inset: 0;
      opacity: 0;
      pointer-events: none;
    }

    .acceptable-income-basis__option span {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 6px 12px;
      border-radius: 999px;
      border: 1px solid var(--secondary-button-border);
      background: var(--secondary-button-bg);
      color: var(--text-muted);
      font-size: 0.85rem;
      font-weight: 500;
      transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    }

    .acceptable-income-basis__option input:checked + span {
      color: var(--text-primary);
      border-color: var(--secondary-button-border);
      background: var(--secondary-button-hover-bg);
    }

    .acceptable-income-inputs {
      gap: 12px;
    }

    .control {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .control.control-panel {
      gap: 12px;
      padding: 16px;
      border-radius: 14px;
      border: 1px solid var(--field-border);
      background: var(--field-output-bg);
    }

    .control--nested {
      gap: 6px;
    }

    .control--fixed-costs {
      gap: 12px;
    }

    .panel-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .inline-field-pair {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 12px;
      align-items: end;
    }

    .inline-field-pair label {
      display: flex;
      flex-direction: column;
      gap: 6px;
      font-size: 0.85rem;
    }

    .panel-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 12px;
    }

    .fixed-costs-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }

    .fixed-costs-grid {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .fixed-cost-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: flex-start;
    }

    .fixed-cost-label {
      flex: 1 1 180px;
      font-weight: 500;
    }

    .fixed-cost-inputs {
      display: grid;
      grid-template-columns: repeat(2, minmax(140px, 1fr));
      gap: 12px;
      flex: 2 1 280px;
    }

    .fixed-cost-inputs label {
      display: flex;
      flex-direction: column;
      gap: 6px;
      font-size: 0.85rem;
    }

    .input-label {
      color: var(--text-muted);
      font-weight: 600;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      font-size: 0.75rem;
    }

    .fixed-cost-total {
      display: flex;
      flex-direction: column;
      gap: 6px;
      padding-top: 8px;
      border-top: 1px solid var(--field-border);
    }

    .fixed-cost-total input[readonly] {
      cursor: default;
      background: var(--field-output-bg);
    }

    label {
      font-size: 0.95rem;
      font-weight: 500;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      flex-wrap: wrap;
    }

    .field-note,
    .field-message {
      font-size: 0.85rem;
      margin: 0;
      color: var(--text-muted);
    }

    .field-message:empty {
      display: none;
    }

    .label-text {
      flex: 1 1 auto;
      min-width: 0;
    }

    .info-icon {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 1.25rem;
      height: 1.25rem;
      border-radius: 999px;
      background: var(--info-bg);
      color: var(--accent);
      cursor: pointer;
      border: 1px solid var(--info-border);
      flex: 0 0 auto;
      transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
      touch-action: manipulation;
      --tooltip-shift: 0px;
    }

    .info-icon svg {
      width: 0.85rem;
      height: 0.85rem;
    }

    .info-icon:hover,
    .info-icon:focus-visible,
    .info-icon.is-active {
      background: var(--info-hover-bg);
      border-color: var(--info-hover-border);
      outline: none;
      color: #fff;
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    .info-icon__tooltip {
      position: absolute;
      bottom: calc(100% + 8px);
      left: 50%;
      transform: translate(calc(-50% + var(--tooltip-shift, 0px)), 4px);
      width: clamp(180px, calc(100vw - 32px), 260px);
      padding: 10px 12px;
      border-radius: 12px;
      background: var(--tooltip-bg);
      color: var(--tooltip-color);
      font-size: 0.8rem;
      line-height: 1.35;
      box-shadow: var(--tooltip-shadow);
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.15s ease, transform 0.15s ease;
      z-index: 10;
    }

    .info-icon__arrow {
      position: absolute;
      bottom: calc(100% + 4px);
      left: 50%;
      transform: translate(calc(-50% + var(--tooltip-shift, 0px)), 4px);
      border-width: 6px;
      border-style: solid;
      border-color: var(--tooltip-bg) transparent transparent transparent;
      opacity: 0;
      transition: opacity 0.15s ease, transform 0.15s ease;
      pointer-events: none;
    }

    .info-icon:hover .info-icon__tooltip,
    .info-icon:focus-visible .info-icon__tooltip,
    .info-icon.is-active .info-icon__tooltip,
    .info-icon:hover .info-icon__arrow,
    .info-icon:focus-visible .info-icon__arrow,
    .info-icon.is-active .info-icon__arrow {
      opacity: 1;
      transform: translate(calc(-50% + var(--tooltip-shift, 0px)), 0);
    }

    input[type="number"],
    input[type="text"] {
      width: 100%;
      padding: 10px 12px;
      border-radius: 10px;
      border: 1px solid var(--field-border);
      background: var(--field-bg);
      color: inherit;
      font-size: 1rem;
      transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.3s ease;
    }

    input[type="number"]:focus,
    input[type="text"]:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    .control output {
      display: block;
      padding: 10px 12px;
      border-radius: 10px;
      font-size: 1rem;
      font-variant-numeric: tabular-nums;
    }

    .output-field {
      border: 1px solid var(--field-output-border);
      background: var(--field-output-bg);
      color: var(--field-output-color);
    }

    .button-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    button {
      border: none;
      border-radius: 999px;
      padding: 10px 18px;
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.2s ease, color 0.2s ease;
      color: var(--button-color);
      background: var(--button-bg);
    }

    button:focus-visible {
      outline: 3px solid var(--focus-outline);
      outline-offset: 2px;
    }

    button:hover {
      transform: translateY(-1px);
      box-shadow: 0 12px 24px var(--button-shadow);
    }

    button.secondary {
      background: var(--secondary-button-bg);
      color: var(--text-primary);
      border: 1px solid var(--secondary-button-border);
    }

    button.secondary:hover {
      background: var(--secondary-button-hover-bg);
    }

    .theme-toggle {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 6px 14px 6px 10px;
      background: var(--card-bg);
      color: var(--text-primary);
      border: 1px solid var(--card-border);
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 600;
      transform: none;
      box-shadow: none;
      transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
    }

    .theme-toggle:hover,
    .theme-toggle:focus-visible {
      transform: none;
      box-shadow: 0 0 0 3px var(--focus-ring);
      background: var(--secondary-button-bg);
      border-color: var(--secondary-button-border);
    }

    .theme-toggle .toggle-track {
      position: relative;
      width: 40px;
      height: 22px;
      border-radius: 999px;
      background: var(--toggle-track);
      border: 1px solid var(--toggle-track-border);
      display: inline-flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 6px;
      transition: background 0.3s ease, border-color 0.3s ease;
    }

    .theme-toggle .toggle-track::before,
    .theme-toggle .toggle-track::after {
      font-size: 0.7rem;
      line-height: 1;
      opacity: 0.65;
    }

    .theme-toggle .toggle-track::before {
      content: '🌙';
    }

    .theme-toggle .toggle-track::after {
      content: '☀️';
    }

    body[data-theme="dark"] .theme-toggle .toggle-track::before {
      opacity: 1;
    }

    body[data-theme="dark"] .theme-toggle .toggle-track::after {
      opacity: 0.45;
    }

    body[data-theme="light"] .theme-toggle .toggle-track::before {
      opacity: 0.45;
    }

    body[data-theme="light"] .theme-toggle .toggle-track::after {
      opacity: 1;
    }

    .theme-toggle .toggle-thumb {
      position: absolute;
      top: 2px;
      left: 2px;
      width: 16px;
      height: 16px;
      border-radius: 999px;
      background: var(--toggle-thumb);
      box-shadow: 0 2px 6px var(--toggle-thumb-shadow);
      transition: transform 0.3s ease;
    }

    body[data-theme="dark"] .theme-toggle .toggle-thumb {
      transform: translateX(0);
    }

    body[data-theme="light"] .theme-toggle .toggle-thumb {
      transform: translateX(20px);
    }

    .theme-toggle .toggle-label {
      font-size: 0.85rem;
      font-weight: 600;
    }

    .tables {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 24px;
      min-width: 0;
    }

    .table-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .table-grid.table-grid--stacked {
      grid-template-columns: minmax(0, 1fr);
    }

    .pricing-card {
      grid-column: 1 / -1;
    }

    .targets-card {
      justify-self: start;
      overflow: hidden;
    }

    .targets-card .card-scroll table {
      width: auto;
      min-width: 0;
    }

    .targets-card .card-scroll {
      overflow-x: visible;
    }

    .targets-card tbody td,
    .targets-card tbody th {
      white-space: nowrap;
    }

    table {
      width: 100%;
      border-collapse: collapse;
      font-variant-numeric: tabular-nums;
      border-radius: 14px;
      overflow: visible;
    }

    caption {
      text-align: left;
      font-size: 1.1rem;
      font-weight: 600;
      margin-bottom: 12px;
    }

    thead th {
      background: var(--table-header-bg);
      padding: 10px 12px;
      text-align: left;
      font-size: 0.9rem;
      color: var(--table-header-text);
    }

    thead th:not(:first-child) {
      text-align: center;
    }

    tbody th,
    tbody td {
      padding: 10px 12px;
      border-top: 1px solid var(--table-row-border);
    }

    tbody th {
      text-align: left;
      font-weight: 600;
      background: var(--row-header-bg);
      color: var(--text-primary);
    }

    tbody td {
      text-align: center;
      line-height: 1.5;
      white-space: nowrap;
    }

    .price-pair {
      display: flex;
      flex-direction: column;
      gap: 8px;
      align-items: flex-start;
    }

    .price-line {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 2px;
      padding: 8px 10px;
      border-radius: 10px;
      background: var(--price-line-bg);
      border: 1px solid var(--price-line-border);
      color: inherit;
      transition: border-color 0.2s ease, background-color 0.2s ease,
        transform 0.2s ease, box-shadow 0.2s ease;
    }

    .price-line strong {
      font-size: 1.05rem;
    }

    .price-line .price-label {
      font-size: 0.75rem;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      color: var(--text-muted);
    }

    .price-line .price-secondary {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .price-line .price-tertiary {
      font-size: 0.75rem;
      color: var(--text-muted);
    }

    .price-value--out-of-range {
      color: var(--price-out-of-range) !important;
    }

    .price-line--out-of-range .price-secondary {
      color: var(--price-out-of-range) !important;
    }

    .price-line.buffered {
      background: var(--price-buffer-bg);
      border-color: var(--price-buffer-border);
    }

    button.price-line {
      width: 100%;
      text-align: left;
      cursor: pointer;
      background: var(--price-line-bg);
      border-radius: 10px;
      border: 1px solid var(--price-line-border);
      color: inherit;
      font: inherit;
      line-height: inherit;
      padding: 8px 10px;
      touch-action: pan-y;
    }

    button.price-line:focus {
      outline: none;
    }

    button.price-line:hover {
      border-color: var(--accent);
      transform: translateY(-1px);
    }

    button.price-line:focus-visible {
      outline: 2px solid var(--focus-outline);
      outline-offset: 2px;
      box-shadow: 0 0 0 3px var(--focus-ring);
    }

    button.price-line.price-line--acceptable {
      background: var(--price-acceptable-bg);
      border-color: var(--price-acceptable-border);
    }

    button.price-line.price-line--acceptable:hover {
      background: var(--price-acceptable-hover);
      border-color: var(--price-acceptable-border);
    }

    button.price-line.price-line--acceptable:focus-visible {
      background: var(--price-acceptable-hover);
      border-color: var(--price-acceptable-border);
    }

    .price-display-toggles {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px 20px;
      margin-bottom: 12px;
    }

    .display-toggle,
    .display-toggle--buffer {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      cursor: pointer;
      font-size: 0.85rem;
      color: var(--text-secondary);
      white-space: nowrap;
    }

    .display-toggle--buffer {
      margin-left: auto;
    }

    .display-toggle-checkbox,
    .buffer-toggle-checkbox {
      width: 0.95rem;
      height: 0.95rem;
      accent-color: var(--accent);
      cursor: pointer;
    }

    .costs-summary {
      margin-top: 16px;
      padding: 12px 16px;
      background: var(--surface-alt);
      border-radius: 8px;
      font-size: 0.85rem;
      line-height: 1.5;
    }

    .costs-summary-item {
      margin: 0 0 6px 0;
      color: var(--text-secondary);
    }

    .costs-summary-item:last-child {
      margin-bottom: 0;
    }

    .costs-summary-item strong {
      color: var(--text-primary);
      font-weight: 600;
    }

    .costs-summary-item em {
      font-style: italic;
      color: var(--text-muted);
    }

    .sub-label {
      display: block;
      font-size: 0.75rem;
      color: var(--text-muted);
      font-weight: 400;
      margin-top: 2px;
    }

    .tables .card {
      min-height: 100%;
      overflow: visible;
    }

    .card-scroll {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      touch-action: pan-x pan-y;
      overscroll-behavior-x: contain;
    }

    .card-scroll table {
      min-width: 100%;
      width: max-content;
    }

    .targets-card .card-scroll table {
      width: auto;
      min-width: 0;
      max-width: 100%;
    }

    .targets-card .card-scroll {
      overflow-x: visible;
    }

    .targets-card {
      overflow: hidden;
    }

    .targets-card tbody td,
    .targets-card tbody th {
      white-space: nowrap;
    }

    @media (max-width: 600px) {
      .targets-card tbody td,
      .targets-card tbody th {
        white-space: normal;
      }
    }

    ul.assumptions {
      margin: 0;
      padding-left: 20px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    .tables-footer {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .status-message {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    @media (max-width: 720px) {
      header {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
      }

      .header-text {
        flex: 1 1 auto;
        text-align: center;
      }

      .theme-toggle {
        align-self: center;
      }

      .persist-controls {
        flex-direction: column;
        align-items: stretch;
        text-align: left;
      }

      .persist-controls__actions,
      .data-portability__actions {
        width: 100%;
        justify-content: flex-start;
      }

      .data-portability__actions button {
        width: 100%;
      }

      .data-portability {
        flex-direction: column;
      }

      .persist-controls button {
        width: 100%;
      }

      .layout {
        gap: 16px;
      }

      .controls {
        gap: 16px;
      }

      .controls .control-sections {
        order: 1;
      }

      .controls .actions {
        order: 2;
      }

      .controls .status-message {
        order: 3;
      }
    }

    @media (max-width: 960px) {
      .layout {
        flex-direction: column;
      }

      .controls {
        flex-basis: auto;
      }
    }

    @media (max-width: 720px) {
      .header-actions {
        width: 100%;
        justify-content: center;
        gap: 10px;
      }

      .fixed-cost-row {
        gap: 10px;
      }

      .fixed-cost-inputs {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 8px;
      }
    }

    @media (max-width: 520px) {
      .fixed-cost-row {
        flex-direction: column;
        align-items: stretch;
        gap: 8px;
      }

      .fixed-cost-label,
      .fixed-cost-inputs {
        flex: 1 1 auto;
        min-height: auto;
        width: 100%;
      }

      .fixed-cost-inputs {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 520px) {
      .section-header {
        align-items: flex-start;
        flex-direction: column;
        gap: 8px;
      }

      .section-toggle--top {
        align-self: flex-end;
      }

      button:not(.section-toggle) {
        width: 100%;
        justify-content: center;
      }

      .button-row {
        flex-direction: column;
      }

      tbody td {
        white-space: normal;
      }
    }