/* PDF 工具箱 - 与站度网浅色风格统一 */
#app * {
    box-sizing: border-box;
}
#app {
    --bg-primary: #fbfbfd;
    --text-primary: #1d1d1f;
    --text-secondary: #6e6e73;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-light: rgba(37,99,235,.08);
    --border: #e5e5e7;
    --card-bg: #fff;
    --radius: 14px;
    --shadow: 0 1px 3px rgba(16,24,40,.06), 0 1px 2px rgba(16,24,40,.04);
    --shadow-hover: 0 8px 24px rgba(16,24,40,.08);
    font-family: -apple-system,BlinkMacSystemFont,"PingFang SC","Helvetica Neue","Microsoft YaHei",Arial,sans-serif;
    color: var(--text-primary);
    background: var(--bg-primary);
    padding: 24px 16px 64px;
}
#app .container {
    max-width: 960px;
    margin: 0 auto;
}
#app .header {
    text-align: center;
    margin-bottom: 28px;
}
#app .header h1 {
    font-size: 28px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 10px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
}
#app .header h1 .svg-icon {
    color: var(--accent);
}
#app .header p {
    color: var(--text-secondary);
    font-size: 15px;
    max-width: 560px;
    margin: 0 auto 12px;
    line-height: 1.6;
}
#app .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 12px;
    color: var(--accent);
    background: var(--accent-light);
    font-weight: 600;
}
#app .tool-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 28px;
}
#app .tool-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    cursor: pointer;
    transition: all .2s ease;
}
#app .tool-card:hover,
#app .tool-card.active {
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}
#app .tool-card-icon {
    flex: 0 0 46px;
    width: 46px;
    height: 46px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(37,99,235,.1), rgba(124,58,237,.1));
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}
#app .tool-card-body {
    min-width: 0;
}
#app .tool-card-title {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 4px;
}
#app .tool-card-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.45;
}
#app .panels {
    margin-bottom: 28px;
}
#app .tool-panel {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
    animation: fadeIn .25s ease;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}
#app .panel-head {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
#app .panel-icon {
    flex: 0 0 40px;
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--accent-light);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
}
#app .panel-title {
    font-size: 17px;
    font-weight: 700;
}
#app .panel-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 2px;
}
#app .field {
    margin-bottom: 18px;
}
#app .field label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}
#app .text-input,
#app select.text-input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: 10px;
    font-size: 14px;
    background: #fff;
    color: var(--text-primary);
    transition: border-color .2s, box-shadow .2s;
}
#app .text-input:focus,
#app select.text-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-light);
}
#app .hint {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-top: 6px;
}
#app .file-zone {
    position: relative;
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 28px 20px;
    text-align: center;
    background: #fafafc;
    transition: border-color .2s, background .2s;
    min-height: 120px;
    display: flex;
    align-items: center;
    justify-content: center;
}
#app .file-zone.dragover,
#app .file-zone:hover {
    border-color: var(--accent);
    background: var(--accent-light);
}
#app .file-input {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}
#app .file-placeholder {
    color: var(--text-secondary);
    font-size: 14px;
    pointer-events: none;
}
#app .file-placeholder .svg-icon {
    display: block;
    margin: 0 auto 8px;
    color: var(--accent);
}
#app .file-list {
    position: absolute;
    left: 16px;
    right: 16px;
    bottom: 14px;
    text-align: left;
    pointer-events: none;
}
#app .file-list:empty {
    display: none;
}
#app .file-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px 10px;
    font-size: 12px;
    color: var(--text-primary);
    max-width: 100%;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    box-shadow: var(--shadow);
}
#app .radio-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}
#app .radio {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-primary);
    cursor: pointer;
    font-weight: 500;
}
#app .radio input {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
}
#app .toolbar-row {
    display: flex;
    gap: 12px;
    margin-top: 6px;
    margin-bottom: 18px;
}
#app .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 11px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all .2s;
}
#app .btn-primary {
    background: var(--accent);
    color: #fff;
    border: 1px solid var(--accent);
}
#app .btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
}
#app .btn-primary:disabled {
    opacity: .55;
    cursor: not-allowed;
}
#app .btn-outline {
    background: #fff;
    color: var(--text-primary);
    border: 1px solid var(--border);
}
#app .btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
}
#app .status-log {
    min-height: 0;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 14px;
}
#app .status-log:empty {
    display: none;
}
#app .status-log .ok { color: #16a34a; }
#app .status-log .err { color: #dc2626; }
#app .status-log .info { color: var(--accent); }
#app .output-area {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
#app .output-area:empty {
    display: none;
}
#app .dl-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: 10px;
    background: var(--accent-light);
    color: var(--accent);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid rgba(37,99,235,.15);
}
#app .dl-link:hover {
    background: var(--accent);
    color: #fff;
}
#app .tip-box {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 16px 18px;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.7;
    box-shadow: var(--shadow);
}
#app .tip-box strong {
    color: var(--text-primary);
}
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}
@media (max-width: 900px) {
    #app .tool-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 540px) {
    #app { padding: 18px 12px 48px; }
    #app .header h1 { font-size: 22px; }
    #app .tool-grid { grid-template-columns: 1fr; }
    #app .tool-card { padding: 14px; }
    #app .radio-row { gap: 10px; }
    #app .toolbar-row { flex-wrap: wrap; }
}