:root {
    --bg: #0a0e1a;
    --bg-gradient: linear-gradient(180deg, #0a0e1a 0%, #0d1b2e 100%);
    --card-bg: #111a2e;
    --border: rgba(255,255,255,0.08);
    --blue: #2f8fff;
    --blue-hover: #1c74e0;
    --text: #e5e9f0;
    --text-muted: #8fa3c0;
  }
  * { box-sizing: border-box; }
  body {
    margin: 0;
    font-family: 'Segoe UI', Arial, sans-serif;
    background: var(--bg-gradient);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }
  header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 32px;
    border-bottom: 1px solid var(--border);
  }
  header img { height: 32px; }
  header .logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--blue);
    letter-spacing: 0.5px;
  }
  .wrap {
    max-width: 520px;
    margin: 60px auto;
    padding: 0 20px;
    flex: 1;
    width: 100%;
    box-sizing: border-box;
  }
  h2 {
    margin-top: 0;
    color: #ffffff;
  }
  .subtitle {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 14px;
  }
  .card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 24px;
  }
  label {
    display: block;
    margin-top: 16px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
  }
  textarea {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    box-sizing: border-box;
    font-family: inherit;
    background: #0c1425;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
  }
  textarea { resize: vertical; }

  input[type=password], input[type=number] {
    width: 100%;
    padding: 10px;
    margin-top: 6px;
    box-sizing: border-box;
    font-family: inherit;
    background: #0c1425;
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
  }

  input[type=file] { display: none; }

  .file-drop {
    margin-top: 6px;
    padding: 28px 16px;
    border: 2px dashed var(--border);
    border-radius: 8px;
    background: #0c1425;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease;
  }
  .file-drop:hover, .file-drop.dragover {
    border-color: var(--blue);
    background: #0e1c33;
  }
  .file-drop .icon {
    font-size: 28px;
    margin-bottom: 8px;
    display: block;
  }
  .file-drop .primary-text {
    color: var(--text);
    font-weight: 600;
    font-size: 14px;
  }
  .file-drop .secondary-text {
    color: var(--text-muted);
    font-size: 12px;
    margin-top: 4px;
  }
  .file-drop .browse-link {
    color: var(--blue);
    font-weight: 600;
  }
  .file-selected {
    display: none;
    margin-top: 10px;
    padding: 10px 12px;
    background: #0c1425;
    border: 1px solid var(--border);
    border-radius: 6px;
    align-items: center;
    justify-content: space-between;
    font-size: 13px;
  }
  .file-selected.show { display: flex; }
  .file-selected .name {
    color: var(--text);
    word-break: break-all;
    padding-right: 8px;
  }
  .file-selected .remove {
    color: var(--text-muted);
    cursor: pointer;
    font-size: 16px;
    flex-shrink: 0;
    background: none;
    border: none;
  }
  .file-selected .remove:hover { color: #ff5c5c; }

  .paste-zone {
    margin-top: 6px;
    padding: 36px 16px;
    border: 2px dashed var(--border);
    border-radius: 8px;
    background: #0c1425;
    text-align: center;
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s ease, background 0.15s ease;
  }
  .paste-zone:hover, .paste-zone:focus, .paste-zone.dragover {
    border-color: var(--blue);
    background: #0e1c33;
  }
  .paste-zone .icon { font-size: 28px; margin-bottom: 8px; display: block; }
  .paste-zone .primary-text { color: var(--text); font-weight: 600; font-size: 14px; }
  .paste-zone .secondary-text { color: var(--text-muted); font-size: 12px; margin-top: 4px; }
  .paste-zone kbd {
    background: #1a2540; border: 1px solid var(--border); border-radius: 4px;
    padding: 1px 6px; font-size: 12px; color: var(--text);
  }
  .screenshot-preview {
    display: none;
    margin-top: 10px;
    padding: 10px;
    background: #0c1425;
    border: 1px solid var(--border);
    border-radius: 6px;
    text-align: center;
  }
  .screenshot-preview.show { display: block; }
  .screenshot-preview img {
    max-width: 100%;
    max-height: 180px;
    border-radius: 4px;
    display: block;
    margin: 0 auto 8px auto;
  }
  .screenshot-preview .status {
    font-size: 13px;
    color: var(--text-muted);
  }
  .tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
  }
  .tabs button {
    flex: 1;
    padding: 10px;
    cursor: pointer;
    border: 1px solid var(--border);
    background: #0c1425;
    color: var(--text-muted);
    border-radius: 6px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.15s ease;
  }
  .tabs button.active {
    background: var(--blue);
    color: #fff;
    border-color: var(--blue);
  }
  #submitBtn {
    margin-top: 20px;
    width: 100%;
    padding: 12px;
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.15s ease;
  }
  #submitBtn:hover { background: var(--blue-hover); }
  #result {
    margin-top: 20px;
    padding: 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
  }
  .share-link-row {
    display: flex;
    gap: 8px;
    margin-top: 10px;
    align-items: stretch;
  }
  #shareLink {
    flex: 1;
    min-width: 0;
    padding: 10px;
    background: #0c1425;
    border: 1px solid var(--border);
    color: var(--text);
    border-radius: 6px;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  #copyBtn {
    flex-shrink: 0;
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    cursor: pointer;
    font-weight: 600;
    white-space: nowrap;
  }
  #copyBtn:hover { background: var(--blue-hover); }
  .copy-msg { margin-top: 8px; color: #4ade80; font-size: 13px; }
  .hidden { display: none; }
  footer {
    text-align: center;
    padding: 24px 20px;
    color: var(--text-muted);
    font-size: 13px;
  }
  footer .heart {
    color: #ff4d4d;
  }