:root {
        --app-foreground: #111111;
        --app-background: #f4f5f7;

        --bg: #f5f5f5;
        --panel: rgba(255, 255, 255, 0.78);
        --panel-strong: rgba(255, 255, 255, 0.92);
        --line: rgba(17, 17, 17, 0.08);
        --text: var(--app-foreground);
        --subtext: #6b7280;
        --shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
        --radius-xl: 28px;
        --radius-lg: 20px;
        --radius-md: 14px;
        --control-h: 52px;
    }    
    
    body {
        font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    }
    button,
    input,
    select,
    textarea {
      font: inherit;
      color: #111;
    }

    button {
      border: none;
    }

    .app-shell {
      width: min(1520px, 100%);
      margin: 0 auto;
      display: grid;
      grid-template-columns: 380px minmax(0, 1fr);
      gap: 24px;
      align-items: start;
    }

    .panel {
      background: var(--panel);
      border: 1px solid var(--line);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      width: 100%;
    }

    .sidebar {
      position: sticky;
      top: 28px;
      padding: 22px;
      display: grid;
      gap: 18px;
    }

    .brand {
      display: grid;
      gap: 10px;
    }

    .brand-chip {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: fit-content;
      min-height: 34px;
      padding: 0 12px;
      border-radius: 999px;
      background: rgba(17,17,17,0.05);
      color: var(--subtext);
      font-size: 13px;
      letter-spacing: -0.01em;
    }

    .brand h1 {
      margin: 0;
      font-size: 32px;
      line-height: 0.95;
      letter-spacing: -0.05em;
      color: #111;
    }

    .brand p {
      margin: 0;
      color: var(--subtext);
      font-size: 14px;
      line-height: 1.6;
    }

    .tab-list {
      display: grid;
      gap: 10px;
    }

    .tab-btn {
      width: 100%;
      min-height: 52px;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,0.72);
      text-align: left;
      padding: 0 16px;
      cursor: pointer;
      transition: transform 0.18s ease, background 0.18s ease, border-color 0.18s ease;
      font-weight: 600;
      letter-spacing: -0.02em;
      color: #111;
    }

    .tab-btn:hover {
      transform: translateY(-1px);
    }

    .tab-btn.active {
      background: #111111;
      color: #ffffff;
      border-color: #111111;
    }

    .field-stack {
      display: grid;
      gap: 14px;
    }

    .control-card {
      border: 1px solid var(--line);
      border-radius: 20px;
      background: rgba(255,255,255,0.56);
      padding: 16px;
      display: grid;
      gap: 14px;
    }

    .control-card h2 {
      margin: 0;
      font-size: 16px;
      letter-spacing: -0.03em;
      color: #111;
    }

    .field {
      display: grid;
      gap: 8px;
    }

    .field label {
      font-size: 13px;
      color: var(--subtext);
      letter-spacing: -0.01em;
    }

    .row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
    }

    .input,
    .select,
    .textarea {
      width: 100%;
      min-height: var(--control-h);
      border-radius: var(--radius-md);
      border: 1px solid var(--line);
      background: var(--panel-strong);
      outline: none;
      padding: 0 14px;
      color: #111;
    }

    .textarea {
      min-height: 180px;
      padding: 14px;
      resize: vertical;
      line-height: 1.6;
      font-size: 13px;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }

    .input:focus,
    .select:focus,
    .textarea:focus {
      border-color: rgba(17,17,17,0.18);
    }

    .range-wrap {
      display: grid;
      gap: 8px;
    }

    .range-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 8px;
      font-size: 14px;
      font-weight: 600;
      letter-spacing: -0.02em;
    }

    input[type="range"] {
      width: 100%;
      appearance: none;
      height: 6px;
      border-radius: 999px;
      background: rgba(17,17,17,0.08);
      outline: none;
    }

    input[type="range"]::-webkit-slider-thumb {
      appearance: none;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: #111111;
      border: none;
      cursor: pointer;
    }

    .btn-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .btn {
      min-height: 46px;
      padding: 0 16px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,0.8);
      cursor: pointer;
      transition: transform 0.18s ease, background 0.18s ease;
      color: #111;
    }

    .btn:hover {
      transform: translateY(-1px);
    }

    .btn.primary {
      background: #111111;
      color: #ffffff;
      border-color: #111111;
    }

    .btn.ghost {
      background: rgba(17,17,17,0.04);
    }

    .content {
      display: grid;
      gap: 24px;
    }

    .hero {
      padding: 28px;
      display: grid;
      gap: 16px;
      position: relative;
      z-index: 3;
    }

    .hero h2 {
      margin: 0;
      font-size: clamp(34px, 5vw, 54px);
      line-height: 1.00;
      letter-spacing: -0.03em;
      outline: none;
    }

    .hero p {
      margin: 0;
      color: var(--subtext);
      font-size: 16px;
      max-width: 100%;
      outline: none;
    }

    .editable {
      border-radius: 12px;
      /* transition: background 0.18s ease; */
      padding: 8px 16px;
      margin-left: -6px;
      width: 100%;
      color: #111;
    }

    .editable:hover,
    .editable:focus {
      background: rgba(17,17,17,0.04);
    }

    .stats {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 12px;
      position: relative;
      z-index: 20;
    }

    .stat {
      border: 1px solid var(--line);
      background: rgba(255,255,255,0.64);
      border-radius: 18px;
      padding: 16px;
      display: grid;
      gap: 6px;
      min-height: 92px;
    }

    .stat-label {
      font-size: 12px;
      color: var(--subtext);
    }

    .stat-value {
      font-size: 18px;
      font-weight: 700;
      letter-spacing: -0.03em;
      color: #111;
    }

    .font-stat {
      position: relative;
      cursor: pointer;
      overflow: visible;
    }

    .font-stat-trigger {
      display: grid;
      gap: 6px;
    }

    .font-stat-caret {
      position: absolute;
      right: 16px;
      top: 18px;
      font-size: 12px;
      color: var(--subtext);
      pointer-events: none;
    }

    .font-dropdown {
      position: absolute;
      left: 0;
      right: 0;
      top: calc(100% + 10px);
      background: rgba(255,255,255,0.96);
      border: 1px solid rgba(17,17,17,0.08);
      border-radius: 18px;
      box-shadow: 0 20px 40px rgba(0,0,0,0.12);
      padding: 12px;
      display: none;
      gap: 10px;
      z-index: 100;
    }

    .font-stat.open .font-dropdown {
      display: grid;
    }

    .font-dropdown-search {
      width: 100%;
      min-height: 44px;
      border-radius: 12px;
      border: 1px solid var(--line);
      background: #fff;
      padding: 0 12px;
      outline: none;
    }

    .font-options {
      max-height: 260px;
      overflow: auto;
      display: grid;
      gap: 6px;
      padding-right: 2px;
      color: #111;
    }

    .font-option {
      width: 100%;
      min-height: 42px;
      padding: 0 12px;
      border-radius: 12px;
      background: rgba(17,17,17,0.04);
      border: 1px solid transparent;
      text-align: left;
      cursor: pointer;
      transition: background 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
    }

    .font-option:hover {
      background: rgba(17,17,17,0.08);
      transform: translateY(-1px);
    }

    .font-option.active {
      background: #111111;
      color: #ffffff;
    }

    .view {
      display: none;
      gap: 24px;
    }

    .view.active {
      display: grid;
    }

    /* .split {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 24px;
    } */

    .card {
      padding: 22px;
    }

    .card-head {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 18px;
      flex-wrap: wrap;
    }

    .card-head h3 {
      margin: 0;
      font-size: 18px;
      letter-spacing: -0.03em;
      color: #111;
    }

    .meta-row {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .pill {
      min-height: 34px;
      display: inline-flex;
      align-items: center;
      padding: 0 12px;
      border-radius: 999px;
      background: rgba(17,17,17,0.05);
      color: var(--subtext);
      font-size: 13px;
      letter-spacing: -0.01em;
    }

    .preview-surface {
      border: 1px solid var(--line);
      border-radius: 22px;
      background: linear-gradient(180deg, rgba(255,255,255,0.92), rgba(255,255,255,0.78));
      padding: 28px;
      overflow: hidden;
    }

    .preview-block + .preview-block {
      margin-top: 28px;
      padding-top: 28px;
      border-top: 1px solid var(--line);
    }

    .preview-kicker {
      margin: 0 0 14px;
      font-family: var(--body-font);
      font-size: var(--caption-size);
      line-height: 1.4;
      font-weight: 600;
      letter-spacing: 0.03em;
      text-transform: uppercase;
      color: var(--subtext);
    }

    .preview-h1,
    .preview-h2,
    .preview-h3 {
      margin: 0;
      font-family: var(--heading-font);
      font-weight: var(--heading-weight);
      color: var(--text);
      letter-spacing: -0.04em;
      color: #111;
    }

    .preview-h1 {
      font-size: var(--h1-size);
      line-height: 1.04;
    }

    .preview-h2 {
      font-size: var(--h2-size);
      line-height: 1.08;
      margin-top: 18px;
    }

    .preview-h3 {
      font-size: var(--h3-size);
      line-height: 1.12;
      margin-top: 18px;
    }

    .preview-body,
    .preview-small,
    .preview-list,
    .preview-button {
      font-family: var(--body-font);
      color: #111;
    }

    .preview-body {
      margin: 16px 0 0;
      font-size: var(--body-size);
      line-height: var(--body-line-height);
      letter-spacing: var(--body-letter-spacing);
      max-width: 68ch;
    }

    .preview-small {
      margin: 14px 0 0;
      font-size: var(--small-size);
      line-height: 1.55;
      color: var(--subtext);
    }

    .preview-list {
      margin-top: 18px;
      display: grid;
      gap: 10px;
      font-size: var(--body-size);
      line-height: var(--body-line-height);
      letter-spacing: var(--body-letter-spacing);
    }

    .preview-list-item {
      display: flex;
      gap: 10px;
      align-items: flex-start;
    }

    /* .preview-dot {
      width: 8px;
      height: 8px;
      margin-top: 0.7em;
      border-radius: 50%;
      background: #111111;
      flex: 0 0 auto;
    } */

    .stat-select {
        position: relative;
        padding: 16px;
        min-height: 92px;
        display: grid;
        align-content: start;
    }

    .stat-select-label {
    display: block;
    font-size: 12px;
    color: var(--subtext);
    margin-bottom: 12px;
    }


    .stat-select-display {
        font-size: 18px;
        font-weight: 700;
        letter-spacing: -0.03em;
        color: #111;
        pointer-events: none;
    }

    .stat-select-caret {
        position: absolute;
        right: 16px;
        top: 18px;
        font-size: 12px;
        color: var(--subtext);
        pointer-events: none;
    }



    .stat-select-input {
        width: 100%;
        min-height: auto;
        padding: 0;
        border: none;
        outline: none;
        background: transparent;
        font-size: 18px;
        font-weight: 700;
        letter-spacing: -0.03em;
        color: #111;
        appearance: none;
        -webkit-appearance: none;
        -moz-appearance: none;
        cursor: pointer;

        opacity: 0;
        position: absolute;
        inset: 0;
        height: 100%;
    }

    .preview-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      margin-top: 22px;
    }

    .preview-button {
      min-height: 46px;
      padding: 0 18px;
      border-radius: 999px;
      border: 1px solid rgba(17,17,17,0.1);
      font-size: var(--body-size);
      font-weight: 600;
      letter-spacing: -0.01em;
      background: #111111;
      color: #ffffff;
      cursor: pointer;
    }

    .preview-button.secondary {
      background: rgba(17,17,17,0.04);
      color: #111111;
    }

    .scale-table {
      width: 100%;
      border-collapse: collapse;
      border: 1px solid var(--line);
      border-radius: 18px;
      overflow: hidden;
      background: rgba(255,255,255,0.72);
    }

    .scale-table thead th {
      text-align: left;
      padding: 14px 16px;
      font-size: 13px;
      color: var(--subtext);
      border-bottom: 1px solid var(--line);
      background: rgba(255,255,255,0.9);
    }

    .scale-table tbody td {
      padding: 16px;
      vertical-align: middle;
      border-bottom: 1px solid var(--line);
    }

    .scale-table tbody tr:last-child td {
      border-bottom: none;
    }

    .scale-name {
      font-size: 14px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #111;
    }

    .scale-token {
      margin-top: 4px;
      font-size: 12px;
      color: var(--subtext);
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }

    .scale-preview-text {
      line-height: 1.12;
      letter-spacing: -0.03em;
      color: #111;
    }

    .scale-preview-body {
      line-height: var(--body-line-height);
      letter-spacing: var(--body-letter-spacing);
      color: #111;
    }

    .scale-num {
      font-size: 14px;
      font-weight: 600;
      letter-spacing: -0.02em;
      color: #111;
    }

    .colour-layout {
      display: grid;
      grid-template-columns: 0.95fr 1.05fr;
      gap: 24px;
    }

    .swatch-preview {
      border: 1px solid var(--line);
      border-radius: 22px;
      overflow: hidden;
      background: #ffffff;
    }

    .swatch-top {
      padding: 28px;
      min-height: 360px;
      display: grid;
      align-content: space-between;
      gap: 20px;
    }

    .contrast-kicker {
      margin: 0;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.04em;
      margin-bottom: 4px;
      opacity: 0.72;
      font-family: var(--colour-body-font);
    }

    .contrast-title {
      margin: 0;
      font-size: clamp(30px, 4vw, 48px);
      line-height: 0.98;
      letter-spacing: -0.05em;
      font-family: var(--colour-heading-font);
      font-weight: var(--colour-heading-weight);
      margin-bottom: 20px;
    }

    .contrast-body {
      margin: 0;
      line-height: var(--colour-body-line-height);
      font-size: 16px;
      letter-spacing: var(--colour-body-letter-spacing);
      font-family: var(--colour-body-font);
    }

    .contrast-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }

    .contrast-chip {
        min-height: 42px;
        padding: 0 14px;
        border-radius: 999px;
        background-color: var(--app-foreground);
        color: var(--app-background);
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-weight: 600;
        letter-spacing: -0.01em;
        font-family: var(--colour-body-font);
        cursor: pointer;
    }

    .contrast-chip-inverse {
        min-height: 42px;
        padding: 0 14px;
        border-radius: 999px;
        border: 1px solid var(--app-foreground);
        background: transparent;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        font-weight: 600;
        letter-spacing: -0.01em;
        font-family: var(--colour-body-font);
        color: var(--app-foreground);
        cursor: pointer;
    }

    .swatch-bottom {
      border-top: 1px solid rgba(0,0,0,0.08);
      display: grid;
      grid-template-columns: 1fr 1fr;
    }

    .swatch-meta {
      padding: 18px 20px;
      display: grid;
      gap: 6px;
    }

    .swatch-meta-label {
      font-size: 12px;
      opacity: 0.7;
      color: #111;
    }

    .swatch-meta-value {
      font-size: 18px;
      font-weight: 700;
      letter-spacing: -0.03em;
      text-transform: uppercase;
      color: #111;
    }

    .contrast-stats {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin-top: 16px;
    }

    .contrast-stat {
      border: 1px solid var(--line);
      background: rgba(255,255,255,0.72);
      border-radius: 18px;
      padding: 16px;
      display: grid;
      gap: 6px;
    }

    .contrast-stat-label {
      font-size: 12px;
      color: var(--subtext);
    }

    .contrast-stat-value {
      font-size: 18px;
      font-weight: 700;
      letter-spacing: -0.03em;
      color: #111;
    }

    .status-grid {
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .status-item {
      min-height: 52px;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: rgba(255,255,255,0.72);
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
      gap: 16px;
    }

    .status-name {
      font-weight: 600;
      letter-spacing: -0.02em;
      color: #111;
    }

    .status-value {
      color: var(--subtext);
      font-size: 14px;
      text-align: right;
    }

    .colour-picker-row {
      display: grid;
      grid-template-columns: 1fr 60px;
      gap: 10px;
      align-items: center;
    }

    .swatch-input {
      width: 100%;
      height: 52px;
      border-radius: 14px;
      border: 1px solid var(--line);
      background: #ffffff;
      padding: 6px;
      cursor: pointer;
    }

    .mono {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    }

    .hidden {
      display: none !important;
    }

    .empty-font-result {
      min-height: 52px;
      display: grid;
      place-items: center;
      border-radius: 12px;
      color: var(--subtext);
      background: rgba(17,17,17,0.03);
      font-size: 13px;
    }

    .position-relative {
        position: relative;
    }

    .icon-wrp {
        position: absolute;
        top: 20px;
        right: 0px;
        transform: translate(-50%, -50%);
        border-radius: 9999px;
        background-color: #f5f5f5;
    }

    .icon-wrp svg {
        display: block;
    }

    .icon-wrp-2 {
        position: absolute;
        top: 50%;
        right: 0px;
        transform: translate(-50%, -50%);
        border-radius: 9999px;
        background-color: #f5f5f5;
    }

    .icon-wrp-2 svg {
        display: block;
    }

    .display-flex {
        display: flex;
        flex-direction: row;
        width: 100%;
    }
    

    @media (max-width: 1260px) {
      .app-shell {
        grid-template-columns: 1fr;
      }

      .sidebar {
        position: static;
      }

      .split,
      .colour-layout {
        grid-template-columns: 1fr;
      }

      .stats {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 720px) {

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

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

      .swatch-bottom {
        grid-template-columns: 1fr;
      }

      .colour-picker-row {
        grid-template-columns: 1fr;
      }
    }