:root{
    --bg: #17191d;
    --panel: #1e2126;
    --panel-raised: #24282f;
    --border: #33383f;
    --text: #e9ecef;
    --text-dim: #8b929c;
    --text-faint: #5a616b;
    --green: #4EF0A8;
    --amber: #FFB347;
    --red: #FF5D5D;
    --mono: 'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
    --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  }
  *{ box-sizing: border-box; }
  html,body{
    margin:0; padding:0;
    background: radial-gradient(ellipse at top, #1c1f24 0%, #131518 100%);
    color: var(--text);
    font-family: var(--sans);
    min-height: 100vh;
  }
  @font-face{ }
  ::selection{ background: var(--green); color: #0a0c0e; }

  .wrap{
    max-width: 880px;
    margin: 0 auto;
    padding: 48px 24px 80px;
  }

  header{
    display:flex;
    align-items: baseline;
    justify-content: space-between;
    margin-bottom: 36px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 20px;
  }
  .brand{
    display:flex;
    align-items:center;
    gap:12px;
  }
  .brand-mark{
    width: 34px; height: 34px;
    border: 1.5px solid var(--green);
    border-radius: 4px;
    display:flex; align-items:center; justify-content:center;
    position: relative;
  }
  .brand-mark::before{
    content:'';
    width: 8px; height: 8px;
    background: var(--green);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--green);
    animation: pulse 2.4s ease-in-out infinite;
  }
  @keyframes pulse{
    0%,100%{ opacity:1; }
    50%{ opacity: .35; }
  }
  .brand-text h1{
    font-family: var(--mono);
    font-size: 15px;
    letter-spacing: 0.14em;
    margin:0;
    text-transform: uppercase;
    font-weight: 600;
  }
  .brand-text span{
    font-size: 11px;
    color: var(--text-faint);
    letter-spacing: 0.08em;
  }
  .badge{
    font-family: var(--mono);
    font-size: 10.5px;
    color: var(--text-dim);
    border: 1px solid var(--border);
    padding: 5px 10px;
    border-radius: 3px;
    letter-spacing: 0.05em;
    white-space: nowrap;
  }

  .lede{
    color: var(--text-dim);
    font-size: 14.5px;
    line-height: 1.6;
    max-width: 62ch;
    margin-bottom: 32px;
  }
  .lede b{ color: var(--text); font-weight: 600; }

  /* Drop zone */
  .dropzone{
    border: 1.5px dashed var(--border);
    border-radius: 8px;
    padding: 48px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color .15s ease, background .15s ease;
    background: linear-gradient(180deg, rgba(255,255,255,0.015), transparent);
  }
  .dropzone:hover, .dropzone.drag{
    border-color: var(--green);
    background: rgba(78,240,168,0.04);
  }
  .dropzone .icon{
    font-family: var(--mono);
    font-size: 26px;
    color: var(--text-faint);
    margin-bottom: 12px;
    letter-spacing: 0.1em;
  }
  .dropzone h3{
    margin: 0 0 6px;
    font-size: 15px;
    font-weight: 600;
  }
  .dropzone p{
    margin: 0;
    font-size: 12.5px;
    color: var(--text-faint);
  }
  input[type=file]{ display:none; }

  /* Source panel */
  .panel{
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 22px 24px;
    margin-top: 20px;
    display:none;
  }
  .panel.show{ display:block; }

  .source-row{
    display:flex;
    gap: 18px;
    align-items: center;
    padding-bottom: 18px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--border);
  }
  video#previewVid{
    width: 130px; height: 74px;
    background: #000;
    border-radius: 4px;
    object-fit: cover;
    border: 1px solid var(--border);
  }
  .source-meta{ flex:1; min-width:0; }
  .source-meta .fname{
    font-size: 13.5px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .source-meta .stats{
    font-family: var(--mono);
    font-size: 11.5px;
    color: var(--text-dim);
    margin-top: 6px;
    display:flex;
    gap: 16px;
    flex-wrap: wrap;
  }
  .source-meta .stats span b{ color: var(--text); font-weight:600; }
  .clear-btn{
    background: none;
    border: 1px solid var(--border);
    color: var(--text-dim);
    font-family: var(--mono);
    font-size: 11px;
    padding: 7px 12px;
    border-radius: 4px;
    cursor: pointer;
    letter-spacing: 0.04em;
  }
  .clear-btn:hover{ border-color: var(--red); color: var(--red); }

  .section-label{
    font-family: var(--mono);
    font-size: 10.5px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--text-faint);
    margin-bottom: 12px;
  }

  /* Quality preset rack */
  .presets{
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(190px,1fr));
    gap: 10px;
    margin-bottom: 22px;
  }
  .preset{
    border: 1px solid var(--border);
    background: var(--panel-raised);
    border-radius: 6px;
    padding: 13px 14px;
    cursor: pointer;
    position: relative;
    transition: border-color .12s ease, background .12s ease;
    user-select: none;
  }
  .preset:hover{ border-color: #454b54; }
  .preset.active{
    border-color: var(--green);
    background: rgba(78,240,168,0.06);
  }
  .preset.disabled{
    opacity: 0.35;
    cursor: not-allowed;
  }
  .preset .top{
    display:flex;
    justify-content: space-between;
    align-items:center;
    margin-bottom: 8px;
  }
  .preset .label{
    font-family: var(--mono);
    font-weight: 600;
    font-size: 14px;
  }
  .preset .check{
    width: 15px; height:15px;
    border-radius: 3px;
    border: 1.5px solid var(--border);
    flex-shrink:0;
    position: relative;
  }
  .preset.active .check{
    border-color: var(--green);
    background: var(--green);
  }
  .preset.active .check::after{
    content:'';
    position:absolute;
    left:4px; top:1px;
    width:4px; height:8px;
    border: solid #0a0c0e;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
  }
  .preset .dims{
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-dim);
  }
  .preset .bitrate{
    font-family: var(--mono);
    font-size: 10.5px;
    color: var(--text-faint);
    margin-top: 3px;
  }

  .est-row{
    font-family: var(--mono);
    font-size: 11.5px;
    color: var(--text-dim);
    margin-bottom: 20px;
    padding: 10px 14px;
    background: rgba(255,255,255,0.02);
    border-radius: 5px;
    border: 1px solid var(--border);
  }
  .est-row b{ color: var(--text); }

  .run-btn{
    width: 100%;
    background: var(--green);
    color: #0a0c0e;
    border: none;
    border-radius: 6px;
    padding: 14px;
    font-family: var(--mono);
    font-weight: 700;
    font-size: 13px;
    letter-spacing: 0.06em;
    cursor: pointer;
    text-transform: uppercase;
    transition: filter .12s ease, opacity .12s ease;
  }
  .run-btn:hover{ filter: brightness(1.08); }
  .run-btn:disabled{
    opacity: 0.4;
    cursor: not-allowed;
  }

  /* Encoding queue / VU meters */
  .queue{
    margin-top: 22px;
    display:none;
  }
  .queue.show{ display:block; }
  .queue-item{
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 14px 16px;
    margin-bottom: 10px;
    background: var(--panel-raised);
  }
  .queue-item .qtop{
    display:flex;
    justify-content:space-between;
    align-items:center;
    margin-bottom: 10px;
    font-family: var(--mono);
    font-size: 12.5px;
  }
  .queue-item .qtop .status{
    color: var(--text-faint);
    font-size: 11px;
  }
  .queue-item .qtop .status.working{ color: var(--amber); }
  .queue-item .qtop .status.done{ color: var(--green); }

  .vu{
    display:flex;
    gap: 3px;
    height: 14px;
  }
  .vu i{
    flex:1;
    background: #2b2f36;
    border-radius: 1px;
    transition: background .1s linear;
  }
  .vu i.lit-g{ background: var(--green); }
  .vu i.lit-a{ background: var(--amber); }
  .vu i.lit-r{ background: var(--red); }

  .dl-row{
    margin-top: 10px;
    display:none;
    align-items:center;
    justify-content: space-between;
    gap: 10px;
  }
  .dl-row.show{ display:flex; }
  .dl-row .size{
    font-family: var(--mono);
    font-size: 11px;
    color: var(--text-dim);
  }
  .dl-link{
    font-family: var(--mono);
    font-size: 11.5px;
    background: none;
    border: 1px solid var(--green);
    color: var(--green);
    padding: 6px 14px;
    border-radius: 4px;
    text-decoration:none;
    cursor:pointer;
    letter-spacing: 0.04em;
  }
  .dl-link:hover{ background: rgba(78,240,168,0.1); }

  .notice{
    margin-top: 24px;
    font-size: 12px;
    color: var(--text-faint);
    line-height: 1.6;
    border-top: 1px solid var(--border);
    padding-top: 16px;
  }
  .notice b{ color: var(--text-dim); }

  .footer-note{
    text-align:center;
    margin-top: 40px;
    font-family: var(--mono);
    font-size: 10.5px;
    color: var(--text-faint);
    letter-spacing: 0.05em;
  }

  @media (max-width: 560px){
    .source-row{ flex-direction:column; align-items:flex-start; }
    video#previewVid{ width: 100%; height: auto; }
  }