/* DOI 引用工具专属样式。所有规则限定在 .doi-tool 内，避免影响其他工具。 */
.doi-tool .doi-intro {
    margin: -8px 0 22px;
    color: var(--text-light);
}

.doi-tool .doi-card {
    margin-bottom: 20px;
    padding: 22px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: #fff;
}

.doi-tool .doi-card:last-of-type {
    margin-bottom: 0;
}

.doi-tool .doi-card h3 {
    margin-bottom: 14px;
    font-size: 1.12rem;
}

.doi-tool .doi-input-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 12px;
}

.doi-tool #doi-input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font: inherit;
    outline: none;
}

.doi-tool #doi-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.doi-tool button:disabled {
    cursor: not-allowed;
    opacity: 0.55;
    transform: none;
}

.doi-tool .doi-helper-row {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 16px;
    align-items: center;
    margin-top: 10px;
    color: var(--text-light);
    font-size: 0.88rem;
}

.doi-tool .doi-text-button {
    padding: 0;
    color: var(--primary);
    border: 0;
    background: none;
    font: inherit;
    text-decoration: underline;
    cursor: pointer;
}

.doi-tool #doi-status {
    min-height: 26px;
    margin-top: 12px;
    font-size: 0.9rem;
}

.doi-tool .status-loading { color: var(--primary); }
.doi-tool .status-error { color: var(--danger); }
.doi-tool .status-success { color: var(--success); }
.doi-tool .hidden { display: none !important; }

.doi-tool .doi-metadata-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 20px;
}

.doi-tool .doi-metadata-item {
    min-width: 0;
}

.doi-tool .doi-metadata-item.wide {
    grid-column: 1 / -1;
}

.doi-tool .doi-metadata-label {
    display: block;
    color: var(--text-light);
    font-size: 0.82rem;
}

.doi-tool .doi-metadata-value {
    overflow-wrap: anywhere;
    font-weight: 600;
}

.doi-tool .doi-metadata-value a,
.doi-tool .doi-guide a,
.doi-tool summary {
    color: var(--primary);
}

.doi-tool details {
    margin-top: 16px;
}

.doi-tool summary {
    cursor: pointer;
    font-weight: 600;
}

.doi-tool #doi-raw-json {
    max-height: 360px;
    overflow: auto;
    margin-top: 10px;
    padding: 14px;
    border-radius: var(--radius);
    color: #dce7ff;
    background: #172033;
    font: 12px/1.55 Consolas, monospace;
    white-space: pre-wrap;
}

.doi-tool .doi-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 14px;
}

.doi-tool .doi-toolbar h3 {
    margin-bottom: 0;
}

.doi-tool .doi-toolbar-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.doi-tool .btn-small {
    padding: 7px 12px;
    font-size: 0.86rem;
}

.doi-tool .doi-citation-list {
    display: grid;
    gap: 14px;
}

.doi-tool .doi-citation-item {
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.doi-tool .doi-citation-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    padding: 10px 13px;
    background: #f4f6fb;
}

.doi-tool .doi-citation-title {
    font-weight: 700;
}

.doi-tool .doi-citation-output {
    min-height: 70px;
    margin: 0;
    padding: 14px;
    overflow-wrap: anywhere;
    white-space: pre-wrap;
}

.doi-tool .doi-citation-output.code {
    color: #dce7ff;
    background: #172033;
    font: 13px/1.55 Consolas, "Courier New", monospace;
}

.doi-tool .doi-notice {
    margin-top: 16px;
    padding: 12px 14px;
    color: #6f5310;
    border-left: 4px solid #f59f00;
    border-radius: 6px;
    background: #fff8db;
    font-size: 0.88rem;
}

.doi-tool .doi-guide ol {
    padding-left: 22px;
    margin-bottom: 10px;
}

.doi-tool .doi-toast {
    position: fixed;
    left: 50%;
    bottom: 26px;
    z-index: 150;
    padding: 10px 18px;
    border-radius: 999px;
    color: #fff;
    background: rgba(21, 31, 49, 0.94);
    opacity: 0;
    pointer-events: none;
    transform: translate(-50%, 12px);
    transition: 0.2s;
}

.doi-tool .doi-toast.show {
    opacity: 1;
    transform: translate(-50%, 0);
}

@media (max-width: 680px) {
    .doi-tool .doi-card {
        padding: 16px;
    }

    .doi-tool .doi-input-row,
    .doi-tool .doi-metadata-grid {
        grid-template-columns: 1fr;
    }

    .doi-tool .doi-metadata-item.wide {
        grid-column: auto;
    }
}