.upload-tabs {
    display: flex;
    flex-wrap: nowrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
    overflow-x: auto;
}

.tab-button {
    padding: 0.75rem 1.5rem;
    border: none;
    background-color: var(--layer-3-um);
    color: var(--text-2);
    border-radius: 8px 8px 0 0;
    cursor: pointer;
    font-family: Poppins, sans-serif;
    font-size: 16px;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.tab-button.active {
    background-color: var(--layer-2-um);
    color: var(--brand-color);
    font-weight: 600;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.upload-form-panel.hidden {
    display: none;
}

.format-hint {
    background-color: var(--layer-1-um);
    padding: 1rem;
    border-radius: 6px;
    margin: 1rem 0;
    color: var(--text-2);
    font-size: 14px;
}

.code-length-hint {
    display: block;
    margin-top: 0.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-2);
    font-size: 0.9rem;
}

.studio-name-field {
    margin-top: 0.25rem;
}

.official-fields-card {
    margin-top: 0.95rem;
    padding: 0.95rem;
    border-radius: 12px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 55%, #7a7a7a 45%);
    background: linear-gradient(
        155deg,
        color-mix(in oklab, var(--layer-2-um) 82%, var(--layer-3-um) 18%),
        color-mix(in oklab, var(--layer-1-um) 80%, var(--layer-2-um) 20%)
    );
}

.official-fields-header {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem;
    margin-bottom: 0.7rem;
}

.official-fields-title {
    margin: 0;
    color: var(--text-1);
    font-size: 1.02rem;
    font-weight: 600;
}

.official-fields-help,
.official-fields-note {
    margin: 0.65rem 0;
    color: var(--text-2);
    font-size: 0.9rem;
    line-height: 1.5;
}

.official-fields-note {
    margin-top: 0.85rem;
}

.manage-cats-link {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    border-radius: 9px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 60%, #7b7b7b 40%);
    background: color-mix(in oklab, var(--layer-3-um) 72%, var(--layer-2-um) 28%);
    color: var(--text-1);
    padding: 0.38rem 0.68rem;
    text-decoration: none;
    font-size: 0.84rem;
    font-weight: 600;
    transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.manage-cats-link:hover {
    transform: translateY(-1px);
    border-color: color-mix(in oklab, var(--brand-color) 60%, #8a8a8a 40%);
    background: color-mix(in oklab, var(--brand-color) 30%, var(--layer-3-um) 70%);
}

.upload-category-state {
    margin: 0;
    padding: 0.6rem 0.2rem;
    text-align: center;
    font-size: 0.88rem;
    color: var(--text-2);
}

.upload-category-state-error {
    color: #ff96a6;
}

.upload-category-state-empty a {
    color: var(--brand-color);
    font-weight: 600;
}

.upload-category-state-empty a:hover {
    text-decoration: underline;
}

.category-tree-upload {
    border-radius: 10px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 58%, #777 42%);
    background: color-mix(in oklab, var(--layer-1-um) 84%, var(--layer-2-um) 16%);
    padding: 0.7rem;
    max-height: 400px;
    overflow-y: auto;
}

.category-tree-upload .tree-node-upload {
    margin-left: var(--tree-indent, 0px);
    margin-bottom: 0.32rem;
}

.category-tree-upload .node-line {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    border-radius: 8px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 56%, #777 44%);
    border-left: 3px solid var(--node-color, #999999);
    background: color-mix(in oklab, var(--layer-2-um) 78%, var(--layer-1-um) 22%);
    padding: 0.45rem 0.55rem;
}

.category-tree-upload .node-line:hover {
    border-color: color-mix(in oklab, var(--brand-color) 52%, #878787 48%);
}

.category-tree-upload .toggle-upload,
.category-tree-upload .leaf-marker {
    width: 18px;
    display: inline-flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.category-tree-upload .toggle-upload {
    user-select: none;
    cursor: pointer;
    color: var(--text-2);
    font-size: 0.78rem;
}

.category-tree-upload .toggle-upload:hover {
    color: var(--text-1);
}

.category-tree-upload .leaf-marker {
    color: color-mix(in oklab, var(--text-2) 72%, #888 28%);
    font-size: 0.63rem;
}

.category-tree-upload .category-label-upload {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    flex: 1;
    color: var(--text-1);
}

.category-tree-upload .category-label-upload:hover {
    opacity: 0.9;
}

.category-tree-upload .category-label-upload input[type="checkbox"] {
    cursor: pointer;
}

.category-tree-upload .category-label-upload-name,
.category-tree-upload .parent-name {
    color: var(--node-color, var(--text-1));
}

.category-tree-upload .category-label-upload-name {
    font-weight: 500;
}

.category-tree-upload .parent-name {
    font-size: 0.95rem;
    font-weight: 600;
}

.category-tree-upload .children-upload {
    margin-top: 0.28rem;
}

.official-upload-fieldset {
    margin-top: 2rem;
    border-color: color-mix(in oklab, var(--brand-color) 62%, #7d6a3b 38%);
    background: linear-gradient(
        165deg,
        color-mix(in oklab, var(--layer-2-um) 86%, var(--layer-3-um) 14%),
        color-mix(in oklab, var(--layer-1-um) 82%, var(--layer-2-um) 18%)
    );
}

.official-upload-intro {
    margin-bottom: 1rem;
    padding: 0.9rem 1rem;
    border-radius: 12px;
    border: 1px solid color-mix(in oklab, var(--brand-color) 44%, #7d7d7d 56%);
    background: color-mix(in oklab, var(--layer-3-um) 72%, var(--layer-2-um) 28%);
}

.official-upload-intro p {
    margin: 0;
    color: var(--text-2);
    line-height: 1.45;
}

.official-upload-intro p + p {
    margin-top: 0.45rem;
}

.official-upload-form {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.official-source-card {
    padding: 0.9rem;
    border-radius: 12px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 55%, #797979 45%);
    background: color-mix(in oklab, var(--layer-2-um) 80%, var(--layer-1-um) 20%);
}

.official-source-title {
    margin: 0 0 0.55rem 0;
    color: var(--text-1);
    font-size: 1rem;
}

.official-source-mode {
    display: flex;
    flex-wrap: wrap;
    gap: 0.9rem;
    margin-bottom: 0.7rem;
}

.official-source-choice {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--text-1);
    font-size: 0.92rem;
}

.official-source-row + .official-source-row {
    margin-top: 0.55rem;
}

.official-source-row label {
    display: block;
    margin-bottom: 0.25rem;
    color: var(--text-2);
    font-size: 0.88rem;
}

.official-source-row input[type="text"],
.official-source-row select {
    width: min(100%, 430px);
    border-radius: 8px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 55%, #8b8b8b 45%);
    background: color-mix(in oklab, var(--layer-1-um) 82%, var(--layer-2-um) 18%);
    color: var(--text-1);
    padding: 0.55rem 0.68rem;
}

.official-source-row input[type="text"]:focus,
.official-source-row select:focus {
    outline: none;
    border-color: color-mix(in oklab, var(--brand-color) 62%, #7f7f7f 38%);
}

.official-upload-input-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
}

.official-upload-input-card {
    padding: 0.8rem;
    border-radius: 10px;
    border: 1px solid color-mix(in oklab, var(--layer-3-um) 52%, #7d7d7d 48%);
    background: color-mix(in oklab, var(--layer-1-um) 84%, var(--layer-2-um) 16%);
}

.official-upload-input-card label {
    display: block;
    margin-bottom: 0.35rem;
}

.official-upload-input-card input[type="file"],
.official-upload-input-card input[type="text"],
.official-upload-input-card textarea {
    width: 100%;
}

.official-categories-panel {
    margin-top: 0.2rem;
}

.official-upload-actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.55rem;
}

.official-reupload-button {
    background-color: #365f7d;
}

.official-reupload-button:hover {
    background-color: #2f536e;
    box-shadow: 0 5px 15px rgba(54, 95, 125, 0.36);
}

@media (max-width: 700px) {
    .official-fields-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .category-tree-upload .tree-node-upload {
        margin-left: 0;
    }

    .official-upload-input-grid {
        grid-template-columns: 1fr;
    }

    .official-source-mode {
        flex-direction: column;
        gap: 0.5rem;
    }

    .official-source-row input[type="text"],
    .official-source-row select {
        width: 100%;
    }
}