@layer components {
  .upload-zone {
    border: 2px dashed var(--ink-200);
    border-radius: var(--r-xl);
    padding: var(--s12) var(--s10);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-md);
    background: var(--ink-50);
    position: relative;
  }
  .upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--forest-500);
    background: var(--forest-50);
  }
  .upload-zone.drag-over { border-style: solid; }
  .upload-zone-icon {
    width: 48px; height: 48px;
    border-radius: var(--r-lg);
    background: #fff;
    border: 1px solid var(--ink-200);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--s4);
    box-shadow: var(--shadow-sm);
  }
  .upload-zone-icon svg { width: 22px; height: 22px; color: var(--forest-700); }
  .upload-zone-title { font-size: 16px; font-weight: 600; color: var(--ink-800); margin-bottom: var(--s2); }
  .upload-zone-subtitle { font-size: 14px; color: var(--ink-400); }
  .upload-zone-rules {
    display: flex;
    justify-content: center;
    gap: var(--s5);
    margin-top: var(--s5);
    flex-wrap: wrap;
  }
  .upload-zone-rule {
    font-size: 12px;
    color: var(--ink-400);
    display: flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
  }

  /* Closed state */
  .upload-zone.closed {
    border-style: solid;
    border-color: var(--ink-150, var(--ink-200));
    background: var(--ink-50);
    cursor: default;
  }
  .upload-zone.closed:hover {
    border-color: var(--ink-150, var(--ink-200));
    background: var(--ink-50);
  }
  .upload-zone-closed-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--s2);
  }
  .upload-zone-closed-msg svg {
    width: 28px;
    height: 28px;
    color: var(--ink-300);
    margin-bottom: var(--s2);
  }
  .upload-zone-closed-msg .upload-zone-title {
    color: var(--ink-500);
  }
  .upload-zone-closed-msg .upload-zone-subtitle {
    color: var(--ink-400);
    font-size: 14px;
  }

  /* Full-screen drag state */
  .upload-zone-full {
    border-radius: var(--r-xl);
    background: rgba(42,82,64,.04);
    border: 2px solid var(--forest-200, var(--forest-300));
    padding: var(--s10);
    text-align: center;
    transition: all var(--transition-md);
  }
  .upload-zone-full:hover, .upload-zone-full.drag-over {
    background: var(--forest-50);
    border-color: var(--forest-500);
  }
  .upload-zone-full .drop-title {
    font-family: var(--font-display);
    font-size: 33px;
    font-weight: 400;
    color: var(--forest-700);
    line-height: 1.1;
  }
  .upload-zone-full .drop-sub {
    font-size: 15px;
    color: var(--ink-400);
    margin-top: var(--s2);
  }

  /* Responsive — tablet */
  @media (max-width: 768px) {
    .upload-zone {
      padding: var(--s6) var(--s4);
    }

    .upload-zone-icon {
      display: none;
    }

    .upload-zone-title {
      font-size: 15px;
    }

    .upload-zone-rules {
      gap: var(--s3);
    }

    .upload-zone-full {
      padding: var(--s6);
    }

    .upload-zone-full .drop-title {
      font-size: 25px;
    }
  }

  /* Responsive — mobile */
  @media (max-width: 480px) {
    .upload-zone {
      padding: var(--s4) var(--s3);
    }

    .upload-zone-subtitle {
      display: none;
    }

    .upload-zone-rules {
      gap: var(--s2);
      margin-top: var(--s3);
    }
  }
}