:root {
    --blue--50: #E6F1FB;
    --blue--100: #B5D4F4;
    --blue--200: #85B7EB;
    --blue--400: #378ADD;
    --blue--600: #185FA5;
    --blue--800: #0C447C;
    --blue--900: #042C53;
    --gray--50: #F7F9FC;
    --gray--100: #EEF2F7;
    --gray--200: #D8E2EF;
    --gray--400: #8FA3BF;
    --gray--600: #4D6480;
    --gray--800: #1E2D3D;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --font-main: 'DM Sans', sans-serif;
    --font-mono: 'DM Mono', monospace;
  }

  .app {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 1.25rem;
    align-items: start;
  }

  /* ── Panel ── */
  .panel {
    background: #fff;
    border: 0.5px solid var(--gray--200);
    border-radius: var(--radius-lg);
    padding: 1.25rem;
    /*position: sticky;
    top: 2rem;*/
  }

  .section-title {
    font-size: 16px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--blue--600);
    margin: 1.1rem 0 .75rem;
    padding-top: .9rem;
    border-top: 0.5px solid var(--blue--50);
  }

  .section-title:first-child { margin-top: 0; padding-top: 0; border-top: none; }

  /* ── Field row ── */
  .field {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 6px;
    margin-bottom: .65rem;
  }

  .field label {
    font-size: 14px;
    color: var(--gray--600);
    grid-column: 1 / -1;
    margin-bottom: 2px;
  }

  .field input[type="range"] {
    grid-column: 1;
    width: 100%;
    accent-color: var(--blue--600);
    height: 4px;
    cursor: pointer;
  }

  .field input[type="range"]:focus {
	outline: none;  
  }

  .badge {
    grid-column: 2;
    font-size: 11px;
    font-weight: 500;
    font-family: var(--font-mono);
    color: var(--blue--800);
    background: var(--blue--50);
    border: 0.5px solid var(--blue--100);
    border-radius: 4px;
    padding: 2px 7px;
    white-space: nowrap;
    min-width: 44px;
    text-align: center;
  }

  .field select,
  .field input[type="color"],
  .field input[type="text"] {
    grid-column: 1 / -1;
    width: 100%;
    border: 0.5px solid var(--gray--200);
    border-radius: var(--radius-sm);
    padding: 6px 8px;
    font-size: 13px;
    font-family: var(--font-main);
    background: #fff;
    color: var(--gray--800);
    appearance: auto;
  }

  .field select:focus,
  .field input:focus {
    outline: 2px solid var(--blue--200);
    outline-offset: 1px;
  }

  .field input[type="color"] {
    height: 34px;
    padding: 2px 4px;
    cursor: pointer;
  }

  .color-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .color-row .field { margin-bottom: 0; }



  /* ── Right column ── */
  .right { display: flex; flex-direction: column; gap: 1rem; position: sticky; top: 80px; }

  .card-column {
    background: #fff;
    border: 0.5px solid var(--gray--200);
    border-radius: var(--radius-lg);
    overflow: hidden;
  }

  .card-header-column {
    padding: .75rem 1.1rem;
    border-bottom: 0.5px solid var(--gray--100);
    display: flex;
    align-items: center;
    justify-content: space-between;
  }

  .card-header-column span {
    font-size: 16px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: var(--blue--600);
  }

  .preview-inner {
    padding: 1.25rem;
  }

  #previewBox {
    font-size: 15px;
    line-height: 1.7;
    color: #1a1a2e;
    transition: all .15s ease;
  }

  /* ── Code output ── */
  .code-wrap {
    padding: 1rem 1.1rem;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--blue--800);
    background: var(--blue--50);
    white-space: pre-wrap;
    word-break: break-all;
    line-height: 1.7;
  }

  .copy-btn {
    background: var(--blue--600);
    color: #fff;
    border: none;
    border-radius: var(--radius-sm);
    padding: 5px 14px;
    font-size: 11px;
    font-family: var(--font-main);
    font-weight: 500;
    cursor: pointer;
    transition: background .15s;
  }

  .copy-btn:hover { background: var(--blue--800); }

  /* ── Intro ── */
  .intro {
    max-width: 1200px;
    margin: 0 auto 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1px;
    background: var(--gray--200);
    border: 0.5px solid var(--gray--200);
    border-radius: var(--radius-lg);
    overflow: hidden;
  }

  .intro-cell {
    background: #fff;
    padding: 1.25rem 1.5rem;
  }

  .intro-cell h3 {
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .09em;
    color: var(--blue--600);
    margin-bottom: .5rem;
  }

  .intro-cell p {
    font-size: 13px;
    color: var(--gray--600);
    line-height: 1.6;
  }

  /* ── About ── */
  .about {
    max-width: 1200px;
    margin: 1.25rem auto 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1px;
    background: var(--gray--200);
    border: 0.5px solid var(--gray--200);
    border-radius: var(--radius-lg);
    overflow: hidden;
  }

  .about-header {
    grid-column: 1 / -1;
    background: #fff;
    padding: 1.25rem 1.5rem;
    border-bottom: 0.5px solid var(--gray--100);
  }

  .about-header h2 {
    font-size: 18px;
    font-weight: 500;
    color: var(--blue--800);
    margin-bottom: .3rem;
  }

  .about-header p {
    font-size: 14px;
    color: var(--gray--400);
    line-height: 1.5;
  }

  .about-cell {
    background: #fff;
    padding: 1.25rem 1.5rem;
  }

  .about-cell h4 {
    font-size: 15px;
    font-weight: 500;
    color: var(--blue--700, var(--blue--600));
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: .5rem;
  }

  .about-cell p {
    font-size: 14px;
    line-height: 1.65;
  }

  .about-cell code {
    font-family: var(--font-mono);
    font-size: 11.5px;
    background: var(--blue--50);
    color: var(--blue--800);
    border: 0.5px solid var(--blue--100);
    border-radius: 3px;
    padding: 1px 5px;
  }

  .prop-list {
    list-style: none;
    margin-top: .5rem;
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .prop-list li {
    font-size: 14px;
    line-height: 1.5;
    padding-left: .85rem;
    position: relative;
  }

  .prop-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--blue--400);
  }
  
@media(max-width:900px){
  
  .app { grid-template-columns:1fr; }
  .about { grid-template-columns:1fr; }
  .panel { max-height: 250px; overflow-y: auto; border-bottom: 1px solid var(--blue--100); }
}