@charset "UTF-8";

/* =========================================
   style_knowledge.css - ナレッジページ専用スタイル
   ========================================= */

/* =========================================
   Filter Area
   ========================================= */
.knowledge-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    align-items: flex-end;
    padding: 2rem;
    margin-top: 2rem;
    background: rgba(var(--color-gray), 1);
    border-radius: 0;
    border: 1px solid var(--color-border);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.filter-title {
    font-size: var(--font-x-small);
    color: rgba(var(--color-black), 0.6);
    letter-spacing: 0.05em;
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.filter-tag {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 1rem;
    font-size: var(--font-x-small);
    color: rgba(var(--color-black), 0.7);
    background: rgba(var(--color-white), 1);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.25s ease;
    white-space: nowrap;
}

.filter-tag:hover {
    border-color: rgba(var(--color-key-1), 0.5);
    color: rgba(var(--color-key-1), 1);
}

.filter-tag.active {
    background: rgba(var(--color-key-1), 1);
    color: rgba(var(--color-white), 1);
    border-color: rgba(var(--color-key-1), 1);
}

.filter-actions {
    margin-left: auto;
    display: flex;
    align-items: flex-end;
}

.filter-clear {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.4rem 1rem;
    font-size: var(--font-x-small);
    color: rgba(var(--color-black), 0.5);
    background: transparent;
    border: 1px solid var(--color-border-light);
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.25s ease;
}

.filter-clear:hover {
    color: rgba(var(--color-black), 0.8);
    border-color: rgba(var(--color-black), 0.3);
}

.filter-clear .material-symbols-outlined {
    font-size: 1rem;
}

/* =========================================
   Results Count
   ========================================= */
.knowledge-results {
    padding: 1.5rem 0 0.5rem;
    color: rgba(var(--color-black), 1);
}

.results-count #results-count {
    font-weight: 500;
    color: rgba(var(--color-key-1), 1);
}

/* =========================================
   Knowledge Card Grid
   ========================================= */
.knowledge-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    padding-top: 1rem;
}

/* =========================================
   Knowledge Card
   ========================================= */
.knowledge-card {
    display: flex;
    flex-direction: column;
    background: rgba(var(--color-white), 1);
    border-radius: 0;
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: all 0.35s ease;
    text-decoration: none;
    color: inherit;
}

.knowledge-card:hover {
    transform: translateY(-4px);    border-color: rgba(var(--color-key-1), 0.3);
}

.knowledge-card.hidden {
    display: none;
}

/* Card Image */
.knowledge-card-image {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
}

.knowledge-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    
    transition: all 0.5s ease;
}

.knowledge-card:hover .knowledge-card-image img {
    filter: grayscale(0%);
    transform: scale(1.05);
}

/* Download Badge */
.card-badge {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    padding: 0.25rem 0.6rem;
    font-size: var(--font-xx-small);
    font-weight: 500;
    color: rgba(var(--color-white), 1);
    background: rgba(var(--color-key-1), 0.9);
    border-radius: 4px;
    backdrop-filter: blur(4px);
}

.card-badge .material-symbols-outlined {
    font-size: 0.875rem;
}

/* Card Body */
.knowledge-card-body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 1.25rem;
}

/* Card Meta (Tags + Date) */
.knowledge-card-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 0.75rem;
}

.knowledge-tag {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    font-size: var(--font-xx-small);
    border-radius: 3px;
    white-space: nowrap;
}

/* Category Tag Colors */
.tag-logistics {
    background: rgba(var(--color-key-2), 0.1);
    color: rgba(var(--color-key-2), 1);
}

.tag-technical {
    background: rgba(var(--color-key-1), 0.12);
    color: rgba(var(--color-key-1), 1);
}

.tag-customs {
    background: rgba(180, 80, 50, 0.1);
    color: rgba(180, 80, 50, 1);
}

.tag-howto {
    background: rgba(100, 60, 160, 0.1);
    color: rgba(100, 60, 160, 1);
}

/* ニュース用カテゴリカラー（統合時に共存） */
.tag-corporate {
    background: rgba(var(--color-key-2), 0.1);
    color: rgba(var(--color-key-2), 1);
}

.tag-system {
    background: rgba(var(--color-key-1), 0.12);
    color: rgba(var(--color-key-1), 1);
}

.tag-seminar {
    background: rgba(180, 130, 20, 0.1);
    color: rgba(160, 115, 15, 1);
}

.tag-media {
    background: rgba(var(--color-key-3), 0.1);
    color: rgba(var(--color-key-3), 1);
}

.tag-book {
    background: rgba(100, 60, 160, 0.1);
    color: rgba(100, 60, 160, 1);
}

.tag-info {
    background: rgba(var(--color-black), 0.08);
    color: rgba(var(--color-black), 0.65);
}

.tag-type {
    background: rgba(var(--color-black), 0.06);
    color: rgba(var(--color-black), 0.55);
}

.knowledge-date {
    margin-left: auto;
    color: rgba(var(--color-black), 0.4);
}

/* Card Title */
.knowledge-card-title {
    font-size: var(--font-small);
    line-height: var(--lh-heading);
    color: rgba(var(--color-black), 0.9);
    margin-bottom: 0.6rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.knowledge-card:hover .knowledge-card-title {
    color: rgba(var(--color-key-1), 1);
}

/* Card Excerpt */
.knowledge-card-excerpt {
    font-size: var(--font-xx-small);
    line-height: var(--lh-body);
    color: rgba(var(--color-black),0.9);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
}

/* Card Link */
.knowledge-card-body .card-link {
    display: block;
    margin-top: 1rem;
    font-size: var(--font-xx-small);
    color: rgba(var(--color-key-1), 1);
    transition: letter-spacing 0.3s ease;
}

.knowledge-card:hover .card-link {
    letter-spacing: 0.1em;
}

/* =========================================
   No Results
   ========================================= */
.knowledge-no-results {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 4rem 2rem;
    text-align: center;
    color: rgba(var(--color-black), 0.4);
}

.knowledge-no-results .material-symbols-outlined {
    font-size: 3rem;
    opacity: 0.3;
}

.knowledge-no-results p {
    font-size: var(--font-small);
}

/* =========================================
   Responsive
   ========================================= */
@media (max-width: 1080px) {
    .knowledge-filter {
        flex-direction: column;
        gap: 1.5rem;
        padding: 1.5rem;
    }

    .filter-actions {
        margin-left: 0;
    }

    .knowledge-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    /* SP: 横並びカード */
    .knowledge-card {
        flex-direction: row;
    }

    .knowledge-card-image {
        width: 120px;
        min-width: 120px;
        aspect-ratio: auto;
        height: auto;
    }

    .knowledge-card-body {
        padding: 1rem;
    }

    .knowledge-card-excerpt {
        -webkit-line-clamp: 2;
    }

    .knowledge-card-title {
        font-size: var(--font-x-small);
    }
}