#pdf-txt-ui {
    --ptt-accent: #2563eb;
    --ptt-accent-hover: #1d4ed8;
    --ptt-success: #059669;
    --ptt-border: #e5e7eb;
    --ptt-muted: #6b7280;
    --ptt-bg: #f8fafc;
    max-width: 560px;
    margin: 0 auto;
    font-family: system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
}

#pdf-txt-ui .ptt-section {
    padding: 1.25rem 0;
}

#pdf-txt-ui .ptt-lead {
    color: var(--ptt-muted);
    margin: 0 0 1rem;
}

#ptt-drop-zone {
    border: 2px dashed var(--ptt-border);
    border-radius: 12px;
    padding: 2rem 1.5rem;
    text-align: center;
    background: var(--ptt-bg);
}

#ptt-drop-zone.is-dragover {
    border-color: var(--ptt-accent);
    background: #eff6ff;
}

#ptt-file-input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
}

#pdf-txt-ui .ptt-btn {
    display: inline-block;
    margin-top: 0.75rem;
    padding: 0.65rem 1.25rem;
    border-radius: 8px;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    font-weight: 600;
    text-decoration: none;
}

#pdf-txt-ui .ptt-btn-primary {
    background: var(--ptt-accent);
    color: #fff;
}

#pdf-txt-ui .ptt-btn-primary:hover {
    background: var(--ptt-accent-hover);
}

#pdf-txt-ui .ptt-btn-success {
    background: var(--ptt-success);
    color: #fff;
}

#pdf-txt-ui .ptt-filename {
    font-weight: 600;
    margin-top: 0.5rem;
}

#pdf-txt-ui .ptt-hint {
    font-size: 0.875rem;
    color: var(--ptt-muted);
}

.ptt-progress-track {
    height: 8px;
    background: var(--ptt-border);
    border-radius: 4px;
    overflow: hidden;
}

#ptt-progress-bar {
    height: 100%;
    width: 0;
    background: var(--ptt-accent);
    transition: width 0.3s;
}

.ptt-result {
    text-align: center;
}

.ptt-icon-ok {
    font-size: 2.5rem;
}

.ptt-link-btn {
    display: block;
    margin: 0.75rem auto 0;
    background: none;
    border: none;
    color: var(--ptt-accent);
    cursor: pointer;
    text-decoration: underline;
}

.ptt-status {
    margin-top: 1rem;
    padding: 0.75rem;
    border-radius: 8px;
    background: #fef2f2;
    color: #b91c1c;
    font-size: 0.9rem;
}