/* ==========================================================================
   DAK User Manual
   ========================================================================== */

.dak-user-manual {
    --dak-um-accent: var(--primary-color, #1683ff);
    --dak-um-text: #171717;
    --dak-um-muted: #efefef;
    --dak-um-hover: #f6f6f6;

    width: 100%;
    color: var(--dak-um-text);
}

.dak-user-manual,
.dak-user-manual * {
    box-sizing: border-box;
}

.dak-um-grid {
    display: grid;
    grid-template-columns: minmax(180px, 220px) minmax(220px, 300px) minmax(120px, 1fr);
    gap: 20px 20px;
    align-items: start;
    width: 100%;
}

.dak-um-models,
.dak-um-document-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.dak-um-model,
.dak-um-document {
    appearance: none;
    -webkit-appearance: none;
    border: 0;
    outline: 0;
    box-shadow: none;
    background: transparent;
    color: var(--dak-um-text);
    font: inherit;
    cursor: pointer;
}

.dak-um-model {
    min-height: 46px;
    width: 100%;
    padding: 0 18px 0 20px;
    border-radius: 999px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    text-align: left;
    font-size: 17px;
    line-height: 1.2;
    font-weight: 600;
    transition:
        color .2s ease,
        background-color .2s ease;
}

.dak-um-model:hover {
    background: var(--dak-um-hover);
}

.dak-um-model.is-active {
    color: var(--dak-um-accent);
    background: var(--dak-um-muted);
}

.dak-um-model.is-active:hover {
    background: var(--dak-um-muted);
}

.dak-um-model__name {
    min-width: 0;
}

.dak-um-chevron {
    width: 18px;
    height: 18px;
    flex: 0 0 18px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: currentColor;
}

.dak-um-chevron i {
    display: inline-block;
    font-size: 18px;
    line-height: 1;
}

.dak-um-documents {
    min-width: 0;
}

.dak-um-document-group[hidden] {
    display: none !important;
}

.dak-um-document {
    min-height: 46px;
    width: 100%;
    padding: 0 20px;
    border-radius: 999px;
    display: flex;
    align-items: center;
    text-align: left;
    font-size: 16px;
    line-height: 1.35;
    font-weight: 400;
    transition:
        color .2s ease,
        background-color .2s ease;
}

.dak-um-document:hover {
    background: var(--dak-um-hover);
}

.dak-um-document.is-active {
    color: var(--dak-um-accent);
    background: var(--dak-um-muted);
}

.dak-um-document.is-active.is-flashing {
    animation: dakUmDocumentFlash .72s ease-in-out 1;
}

@keyframes dakUmDocumentFlash {
    0%,
    100% {
        background: var(--dak-um-muted);
        color: var(--dak-um-accent);
    }

    20% {
        background: rgba(22, 131, 255, .14);
        color: var(--dak-um-accent);
    }

    40% {
        background: var(--dak-um-muted);
        color: var(--dak-um-accent);
    }

    60% {
        background: rgba(22, 131, 255, .14);
        color: var(--dak-um-accent);
    }

    80% {
        background: var(--dak-um-muted);
        color: var(--dak-um-accent);
    }
}

.dak-um-download-wrap {
    min-height: 46px;
    display: flex;
    align-items: center;
    padding-left: 18px;
}

.dak-um-download {
    display: inline-flex;
    align-items: center;
    gap: 11px;
    min-height: 46px;
    padding: 6px 10px 6px 14px;
    border: 1px solid #e7e7e7;
    border-radius: 999px;
    background: #fff;
    color: var(--dak-um-text);
    text-decoration: none !important;
    font-size: 15px;
    line-height: 1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .04);
    transition:
        color .2s ease,
        border-color .2s ease,
        background-color .2s ease,
        box-shadow .2s ease,
        transform .2s ease;
}

.dak-um-download:hover {
    color: var(--dak-um-accent);
    border-color: rgba(22, 131, 255, .24);
    background: #f8fbff;
    box-shadow: 0 5px 16px rgba(22, 131, 255, .09);
    transform: translateY(-1px);
}

.dak-um-download__file-icon {
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: #f5f7fa;
    color: var(--dak-um-accent);
}

.dak-um-download__file-icon i {
    display: inline-block;
    font-size: 22px;
    line-height: 1;
}

.dak-um-download__size {
    min-width: 48px;
    color: #8a8a8a;
    font-size: 12px;
    line-height: 1;
    white-space: nowrap;
}

.dak-um-download:hover .dak-um-download__size {
    color: currentColor;
}

/* Remix Icon 文件类型配色 */
.dak-um-download__file-icon[data-icon-type="pdf"] {
       color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="word"] {
      color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="excel"] {
      color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="powerpoint"] {
       color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="archive"] {
      color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="image"] {
       color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="video"] {
      color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="audio"] {
       color: #007FFF;
}

.dak-um-download__file-icon[data-icon-type="text"],
.dak-um-download__file-icon[data-icon-type="file"] {
       color: #007FFF;
}

.dak-um-download__label {
    font-weight: 600;
    white-space: nowrap;
}

.dak-um-download__arrow {
    width: 30px;
    height: 30px;
    flex: 0 0 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-left: 2px;
    border-radius: 50%;
    background: var(--dak-um-accent);
    color: #fff;
    transition:
        transform .2s ease,
        background-color .2s ease;
}

.dak-um-download__arrow i {
    font-size: 17px;
    line-height: 1;
}

.dak-um-download:hover .dak-um-download__arrow {
    transform: translateY(1px);
}

.dak-um-download.is-disabled {
    opacity: .35;
    pointer-events: none;
    cursor: default;
    box-shadow: none;
}

.dak-um-empty {
    padding: 18px 20px;
    border: 1px dashed #d7d7d7;
    color: #666;
    background: #fafafa;
    font-size: 14px;
}


/* ==========================================================================
   Tablet
   ========================================================================== */

@media (max-width: 849px) {

    .dak-um-grid {
        grid-template-columns: minmax(160px, .85fr) minmax(200px, 1fr) 110px;
        gap: 14px;
    }

    .dak-um-model,
    .dak-um-document {
        font-size: 15px;
        padding-left: 16px;
        padding-right: 16px;
    }

    .dak-um-download-wrap {
        padding-left: 8px;
    }

    .dak-um-download {
        gap: 18px;
        font-size: 15px;
    }
}


/* ==========================================================================
   Mobile drill-down
   ========================================================================== */

.dak-um-mobile-nav,
.dak-um-mobile-viewport {
    display: none;
}

@media (max-width: 649px) {

    .dak-user-manual {
        overflow: hidden;
    }

    /*
     * 桌面三列结构手机端隐藏，
     * 数据仍保留在 DOM 里供 JS 读取。
     */
    .dak-user-manual > .dak-um-grid {
        display: none !important;
    }

    .dak-um-mobile-nav {
        display: grid;
        grid-template-columns: 88px minmax(0, 1fr) 74px;
        align-items: center;
        min-height: 46px;
        margin-bottom: 14px;
        border-bottom: 1px solid #e9e9e9;
    }

    .dak-um-mobile-back,
    .dak-um-mobile-all {
        appearance: none;
        -webkit-appearance: none;
        border: 0;
        background: transparent;
        box-shadow: none;
        padding: 0;
        min-height: 46px;
        display: inline-flex;
        align-items: center;
        gap: 5px;
        color: #191919;
        font: inherit;
        font-size: 13px;
        cursor: pointer;
    }

    .dak-um-mobile-back {
        justify-content: flex-start;
    }

    .dak-um-mobile-all {
        justify-content: flex-end;
        color: var(--dak-um-accent);
    }

    .dak-um-mobile-back i,
    .dak-um-mobile-all i {
        font-size: 18px;
        line-height: 1;
    }

    .dak-um-mobile-title {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        text-align: center;
        font-size: 15px;
        font-weight: 600;
        color: #171717;
    }

    .dak-um-mobile-back.is-hidden,
    .dak-um-mobile-all.is-hidden {
        visibility: hidden;
        pointer-events: none;
    }

    .dak-um-mobile-viewport {
        display: block;
        width: 100%;
        overflow: hidden;
    }

    .dak-um-mobile-track {
        display: flex;
        width: 300%;
        transform: translate3d(0, 0, 0);
        transition: transform .32s cubic-bezier(.22, .61, .36, 1);
        will-change: transform;
    }

    .dak-um-mobile-panel {
        width: 33.333333%;
        flex: 0 0 33.333333%;
        min-width: 0;
        padding: 0 1px;
    }

    .dak-um-mobile-panel-title {
        margin: 0 0 10px;
        color: #8a8a8a;
        font-size: 12px;
        line-height: 1.2;
        text-transform: uppercase;
        letter-spacing: .04em;
    }

    .dak-um-mobile-model-list,
    .dak-um-mobile-document-list {
        display: flex;
        flex-direction: column;
        gap: 7px;
    }

    .dak-um-mobile-model-item,
    .dak-um-mobile-document-item {
        appearance: none;
        -webkit-appearance: none;
        width: 100%;
        min-height: 48px;
        border: 0;
        border-bottom: 1px solid #ededed;
        background: transparent;
        box-shadow: none;
        padding: 0 4px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 14px;
        color: #171717;
        font: inherit;
        font-size: 15px;
        text-align: left;
        cursor: pointer;
    }

    .dak-um-mobile-model-item__name,
    .dak-um-mobile-document-item__name {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }

    .dak-um-mobile-model-item i,
    .dak-um-mobile-document-item i {
        flex: 0 0 auto;
        font-size: 19px;
        color: #666;
    }

    .dak-um-mobile-model-item.is-active,
    .dak-um-mobile-document-item.is-active {
        color: var(--dak-um-accent);
    }

    .dak-um-mobile-download-slot {
        padding-top: 2px;
    }

    /*
     * 第三层下载卡：继续使用现有下载按钮，
     * 手机端稍微放宽成整行。
     */
    .dak-um-mobile-download-slot .dak-um-download {
        width: 100%;
        min-height: 54px;
        justify-content: flex-start;
        padding: 8px 10px 8px 12px;
        border-radius: 0;
    }

    .dak-um-mobile-download-slot .dak-um-download__arrow {
        margin-left: auto;
    }

    .dak-um-mobile-download-slot .dak-um-download__size {
        margin-left: 2px;
    }

    .dak-user-manual[data-mobile-level="models"] .dak-um-mobile-track {
        transform: translate3d(0, 0, 0);
    }

    .dak-user-manual[data-mobile-level="documents"] .dak-um-mobile-track {
        transform: translate3d(-33.333333%, 0, 0);
    }

    .dak-user-manual[data-mobile-level="download"] .dak-um-mobile-track {
        transform: translate3d(-66.666666%, 0, 0);
    }
}

/* ==========================================================================
   Reduced motion
   ========================================================================== */

@media (prefers-reduced-motion: reduce) {

    .dak-um-model,
    .dak-um-document,
    .dak-um-download,
    .dak-um-mobile-track {
        transition: none;
    }

    .dak-um-document.is-active.is-flashing {
        animation: none;
    }
}