/* ==========================================================================
   Smart Related Posts - CSS
   Version: 1.0.0
   テーマ非依存・レスポンシブ・ダーク/ライト両対応
   ========================================================================== */

/* --- Container --- */
.srp-container {
    margin: 2.5em 0 1em;
    padding: 0;
    clear: both;
}

.srp-heading {
    font-size: 1.3em;
    font-weight: 700;
    margin: 0 0 1em;
    padding: 0 0 0.5em;
    border-bottom: 2px solid #222;
    line-height: 1.4;
}

/* --- Grid Layout --- */
.srp-grid {
    display: grid;
    gap: 1.2em;
}

.srp-grid.srp-cols-2 {
    grid-template-columns: repeat(2, 1fr);
}

.srp-grid.srp-cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.srp-grid.srp-cols-4 {
    grid-template-columns: repeat(4, 1fr);
}

/* --- List Layout --- */
.srp-list .srp-item {
    margin-bottom: 1em;
}

.srp-list .srp-link {
    display: flex;
    align-items: flex-start;
    gap: 1em;
}

.srp-list .srp-thumb-wrap {
    flex-shrink: 0;
    width: 160px;
}

.srp-list .srp-meta {
    flex: 1;
    min-width: 0;
}

/* --- Item --- */
.srp-item {
    position: relative;
}

.srp-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: opacity 0.2s ease;
}

.srp-link:hover {
    opacity: 0.8;
}

.srp-link:hover .srp-title {
    text-decoration: underline;
}

/* --- Thumbnail --- */
.srp-thumb-wrap {
    position: relative;
    overflow: hidden;
    border-radius: 6px;
    background: #f0f0f0;
}

.srp-grid .srp-thumb-wrap {
    aspect-ratio: 16 / 10;
}

.srp-list .srp-thumb-wrap {
    aspect-ratio: 16 / 10;
}

.srp-thumb {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.srp-no-thumb {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    min-height: 100px;
    background: linear-gradient(135deg, #e8e8e8 0%, #d0d0d0 100%);
    color: #999;
    font-size: 0.8em;
    font-weight: 500;
}

/* --- Category Label --- */
.srp-cat {
    position: absolute;
    top: 8px;
    left: 8px;
    background: rgba(0, 0, 0, 0.7);
    color: #fff;
    font-size: 0.65em;
    font-weight: 600;
    padding: 3px 8px;
    border-radius: 3px;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    line-height: 1.4;
}

/* --- Meta --- */
.srp-grid .srp-meta {
    padding: 0.6em 0 0;
}

.srp-title {
    font-size: 0.9em;
    font-weight: 600;
    line-height: 1.5;
    margin: 0 0 0.3em;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.srp-list .srp-title {
    font-size: 1em;
    -webkit-line-clamp: 2;
}

.srp-excerpt {
    font-size: 0.8em;
    color: #666;
    line-height: 1.6;
    margin: 0.3em 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.srp-date {
    font-size: 0.75em;
    color: #999;
    display: block;
    margin-top: 0.3em;
}

/* ==========================================================================
   Responsive
   ========================================================================== */

/* タブレット */
@media (max-width: 768px) {
    .srp-grid.srp-cols-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .srp-grid.srp-cols-3 {
        grid-template-columns: repeat(2, 1fr);
    }

    .srp-list .srp-thumb-wrap {
        width: 120px;
    }
}

/* スマホ */
@media (max-width: 480px) {
    .srp-grid.srp-cols-4,
    .srp-grid.srp-cols-3,
    .srp-grid.srp-cols-2 {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.8em;
    }

    .srp-title {
        font-size: 0.8em;
        -webkit-line-clamp: 2;
    }

    .srp-cat {
        font-size: 0.6em;
        padding: 2px 5px;
    }

    .srp-list .srp-link {
        gap: 0.7em;
    }

    .srp-list .srp-thumb-wrap {
        width: 100px;
    }

    .srp-excerpt {
        display: none;
    }
}