/* ============================================================
   Advanced Search & Filter — Frontend Styles
   ============================================================ */


:root {
    --asf-bg:           #ffffff;
    --asf-surface:      #f8f8fb;
    --asf-surface2:     #f0f0f6;
    --asf-border:       #e2e2ee;
    --asf-border-focus: #5b5ef4;
    --asf-text:         #1a1a2e;
    --asf-text-muted:   #6b6b8a;
    --asf-accent:       #5b5ef4;
    --asf-accent-hover: #4548d4;
    --asf-accent-light: #ededff;
    --asf-danger:       #e04b4b;
    --asf-success:      #22c55e;
    --asf-radius:       10px;
    --asf-radius-sm:    6px;
    --asf-shadow:       0 2px 16px rgba(91,94,244,.08);
    --asf-shadow-hover: 0 4px 24px rgba(91,94,244,.14);
    --asf-font:         'Segoe UI', system-ui, -apple-system, sans-serif;
    --asf-mono:         'JetBrains Mono', 'Fira Mono', monospace;
    --asf-transition:   .18s cubic-bezier(.4,0,.2,1);
}

.asf-wrap *,
.asf-wrap *::before,
.asf-wrap *::after { box-sizing: border-box; }

.asf-wrap {
    font-family: var(--asf-font);
    color: var(--asf-text);
    line-height: 1.2;
    display: grid;
    grid-template-columns: 550px 1fr;
    gap: 24px;
    align-items: start;
    max-width: 1200px;
}

/* ── Filter Panel ─────────────────────────────────────────── */

.asf-filter-panel {
    background: var(--asf-bg);
    border: 1px solid var(--asf-border);
    border-radius: var(--asf-radius);
    box-shadow: var(--asf-shadow);
    position: sticky;
    top: 24px;
    overflow: hidden;
}

.asf-filter-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: var(--asf-accent);
    color: #fff;
    font-size: .875rem;
    font-weight: 600;
    letter-spacing: .02em;
    text-transform: uppercase;
}

.asf-filter-header svg {
    width: 16px; height: 16px; flex-shrink: 0;
}

.asf-filters-toggle {
    margin-left: auto;
    background: rgba(255,255,255,.15);
    border: none;
    color: #fff;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--asf-radius-sm);
    font-size: .65rem;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: background var(--asf-transition);
}
.asf-filters-toggle:hover { background: rgba(255,255,255,.25); }
.asf-chevron { width: 14px; height: 14px; transition: transform var(--asf-transition); }
.asf-filters-toggle[aria-expanded="false"] .asf-chevron { transform: rotate(180deg); }

.asf-filters-body {
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.asf-filters-body.asf-collapsed { display: none; }

/* ── Filter Groups ────────────────────────────────────────── */

.asf-filter-group { display: flex; flex-direction: column; gap: 8px; }

.asf-filter-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .8rem;
    font-weight: 600;
    color: var(--asf-text-muted);
    text-transform: uppercase;
    letter-spacing: .05em;
}
.asf-filter-label svg { width: 13px; height: 13px; }

/* Inputs */
.asf-input-wrap { position: relative; }

.asf-input {
    width: 100%;
    padding: 9px 14px 9px 12px;
    border: 1.5px solid var(--asf-border);
    border-radius: var(--asf-radius-sm);
    background: var(--asf-surface);
    color: var(--asf-text);
    font-size: .9rem;
    font-family: var(--asf-font);
    transition: border-color var(--asf-transition), box-shadow var(--asf-transition);
    appearance: none;
}
.asf-input:focus {
    outline: none;
    border-color: var(--asf-border-focus);
    box-shadow: 0 0 0 3px rgba(91,94,244,.12);
    background: var(--asf-bg);
}

.asf-input-clear {
    position: absolute;
    right: 10px; top: 50%;
    transform: translateY(-50%);
    width: 18px; height: 18px;
    background: var(--asf-surface2);
    border-radius: 50%;
    display: none;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: .75rem;
    color: var(--asf-text-muted);
    transition: background var(--asf-transition);
    line-height: 1;
}
.asf-input-clear:hover { background: var(--asf-border); color: var(--asf-danger); }
.asf-input-clear.visible { display: flex; }

/* Select */
.asf-select {
    width: 100%;
    padding: 9px 32px 9px 12px;
    border: 1.5px solid var(--asf-border);
    border-radius: var(--asf-radius-sm);
    background: var(--asf-surface) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%236b6b8a' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right 10px center/14px;
    color: var(--asf-text);
    font-size: .9rem;
    font-family: var(--asf-font);
    cursor: pointer;
    appearance: none;
    transition: border-color var(--asf-transition), box-shadow var(--asf-transition);
}
.asf-select:focus {
    outline: none;
    border-color: var(--asf-border-focus);
    box-shadow: 0 0 0 3px rgba(91,94,244,.12);
}

/* Multi-select checkboxes */
.asf-check-list {
    display: flex;
    flex-direction: column;
    gap: 4px;
    max-height: 160px;
    overflow-y: auto;
    padding: 2px;
    scrollbar-width: thin;
    scrollbar-color: var(--asf-border) transparent;
}
.asf-check-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: var(--asf-radius-sm);
    cursor: pointer;
    transition: background var(--asf-transition);
    font-size: .875rem;
}
.asf-check-item:hover { background: var(--asf-accent-light); }
.asf-check-item input[type="checkbox"] {
    width: 15px; height: 15px;
    accent-color: var(--asf-accent);
    cursor: pointer;
}
.asf-check-item .asf-count {
    margin-left: auto;
    font-size: .75rem;
    color: var(--asf-text-muted);
    background: var(--asf-surface2);
    padding: 1px 6px;
    border-radius: 20px;
}

/* Date Range */
.asf-date-range {
    display: flex;
    align-items: center;
    gap: 8px;
}
.asf-date-field { flex: 1; display: flex; flex-direction: column; gap: 4px; }
.asf-date-field label { font-size: .75rem; color: var(--asf-text-muted); }
.asf-date-input { padding: 8px 10px; }
.asf-date-sep { color: var(--asf-text-muted); font-weight: bold; flex-shrink: 0; }

/* Sort row */
.asf-sort-row { display: flex; gap: 8px; }
.asf-select-order { width: auto; flex-shrink: 0; }

/* Meta filter builder */
.asf-meta-row {
    display: grid;
    grid-template-columns: 1fr auto 1fr 28px;
    gap: 6px;
    align-items: center;
}
.asf-meta-row .asf-input, .asf-meta-row .asf-select { padding: 7px 10px; font-size: .8rem; }
.asf-meta-remove {
    width: 28px; height: 28px;
    background: none;
    border: 1.5px solid var(--asf-border);
    border-radius: var(--asf-radius-sm);
    color: var(--asf-text-muted);
    cursor: pointer;
    font-size: 1rem;
    display: flex; align-items: center; justify-content: center;
    transition: all var(--asf-transition);
}
.asf-meta-remove:hover { background: #fff0f0; border-color: var(--asf-danger); color: var(--asf-danger); }

.asf-add-meta {
    background: none;
    border: 1.5px dashed var(--asf-border);
    border-radius: var(--asf-radius-sm);
    color: var(--asf-accent);
    cursor: pointer;
    padding: 7px 12px;
    font-size: .85rem;
    width: 100%;
    display: flex; align-items: center; justify-content: center; gap: 6px;
    transition: all var(--asf-transition);
}
.asf-add-meta:hover { background: var(--asf-accent-light); border-color: var(--asf-accent); }

/* Filter footer */
.asf-filter-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 12px;
    border-top: 1px solid var(--asf-border);
}
.asf-active-count {
    font-size: .8rem;
    color: var(--asf-text-muted);
}
.asf-active-count span {
    font-weight: 700;
    color: var(--asf-accent);
}

/* Buttons */
.asf-btn {
    padding: 3px 4px;
    border-radius: var(--asf-radius-sm);
    font-size: .65rem;
    font-weight: 400;
    cursor: pointer;
    transition: all var(--asf-transition);
    border: none;
}
.asf-btn-reset {
    background: none;
    color: var(--asf-danger);
    border: 1.5px solid var(--asf-danger);
}
.asf-btn-reset:hover { background: #fff0f0; }

/* Loading filters */
.asf-loading-filters {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: .65rem;
    color: var(--asf-text-muted);
    padding: 5px 0;
}

/* ── Results Area ─────────────────────────────────────────── */

.asf-results-wrap { min-height: 200px; }

.asf-results-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    font-size: .875rem;
    color: var(--asf-text-muted);
}
.asf-results-count strong { color: var(--asf-text); }

.asf-results {
    display: flex;
    flex-direction: column;
    gap: 14px;
    min-height: 100px;
    position: relative;
}

/* Placeholder */
.asf-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
    color: var(--asf-text-muted);
    gap: 16px;
}
.asf-placeholder-icon svg {
    width: 72px; height: 72px;
    opacity: .3;
}
.asf-placeholder p { font-size: .95rem; max-width: 340px; }

/* Loading overlay */
.asf-loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255,255,255,.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    border-radius: var(--asf-radius);
    backdrop-filter: blur(2px);
}

/* Spinner */
.asf-spinner {
    display: inline-block;
    width: 20px; height: 20px;
    border: 2.5px solid var(--asf-accent-light);
    border-top-color: var(--asf-accent);
    border-radius: 50%;
    animation: asf-spin .7s linear infinite;
    flex-shrink: 0;
}
.asf-loading-overlay .asf-spinner { width: 36px; height: 36px; border-width: 3px; }
@keyframes asf-spin { to { transform: rotate(360deg); } }

/* ── Post Card ───────────────────────────────────────────── */

.asf-post-card {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0;
    background: var(--asf-bg);
    border: 1px solid var(--asf-border);
    border-radius: var(--asf-radius);
    overflow: hidden;
    box-shadow: var(--asf-shadow);
    transition: box-shadow var(--asf-transition), transform var(--asf-transition);
    animation: asf-fade-in .2s ease-out both;
}
.asf-post-card:hover {
    box-shadow: var(--asf-shadow-hover);
    transform: translateY(-2px);
}
@keyframes asf-fade-in {
    from { opacity: 0; transform: translateY(8px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Thumbnail */
.asf-card-thumb {
    width: 120px;
    flex-shrink: 0;
    overflow: hidden;
    background: var(--asf-surface2);
}
.asf-card-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform .3s ease;
}
.asf-post-card:hover .asf-card-thumb img { transform: scale(1.04); }
.asf-thumb-placeholder {
    width: 100%; height: 100%;
    display: flex; align-items: center; justify-content: center;
    color: var(--asf-border);
}
.asf-thumb-placeholder svg { width: 32px; height: 32px; }

/* Body */
.asf-card-body {
    padding: 14px 16px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.asf-card-meta-top {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.asf-post-type-badge {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    background: var(--asf-accent);
    color: #fff;
    padding: 2px 8px;
    border-radius: 20px;
    white-space: nowrap;
}

.asf-card-date {
    font-size: .78rem;
    color: var(--asf-text-muted);
    display: flex; align-items: center; gap: 4px;
}
.asf-card-date svg { width: 12px; height: 12px; }

.asf-card-title {
    margin: 0;
    font-size: 1rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--asf-text);
}
.asf-card-title a {
    color: inherit;
    text-decoration: none;
    transition: color var(--asf-transition);
}
.asf-card-title a:hover { color: var(--asf-accent); }

.asf-card-excerpt {
    font-size: .875rem;
    color: var(--asf-text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Card footer */
.asf-card-footer {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-top: auto;
    padding-top: 6px;
}

.asf-card-author {
    display: flex; align-items: center; gap: 5px;
    font-size: .8rem; color: var(--asf-text-muted);
}
.asf-card-author svg { width: 13px; height: 13px; }
.asf-card-author a { color: inherit; text-decoration: none; }
.asf-card-author a:hover { color: var(--asf-accent); text-decoration: underline; }

.asf-card-terms { display: flex; flex-wrap: wrap; gap: 4px; }
.asf-term-chip {
    font-size: .72rem;
    padding: 2px 8px;
    border-radius: 20px;
    background: var(--asf-surface2);
    color: var(--asf-text-muted);
    text-decoration: none;
    transition: all var(--asf-transition);
    border: 1px solid var(--asf-border);
}
.asf-term-chip:hover { background: var(--asf-accent-light); color: var(--asf-accent); border-color: var(--asf-accent); }

/* Read more link */
.asf-read-more {
    margin-left: auto;
    font-size: .8rem;
    color: var(--asf-accent);
    text-decoration: none;
    display: flex; align-items: center; gap: 4px;
    font-weight: 500;
    transition: gap var(--asf-transition);
}
.asf-read-more:hover { gap: 7px; }

/* ── No results ───────────────────────────────────────────── */

.asf-no-results {
    text-align: center;
    padding: 60px 20px;
    color: var(--asf-text-muted);
}
.asf-no-results svg { width: 56px; height: 56px; opacity: .25; margin-bottom: 16px; }
.asf-no-results h3 { font-size: 1.1rem; color: var(--asf-text); margin: 0 0 8px; }
.asf-no-results p { font-size: .9rem; max-width: 320px; margin: 0 auto; }

/* ── Pagination ───────────────────────────────────────────── */

.asf-pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 4px;
    margin-top: 24px;
    flex-wrap: wrap;
}
.asf-page-btn {
    min-width: 36px; height: 36px;
    padding: 0 10px;
    border: 1.5px solid var(--asf-border);
    border-radius: var(--asf-radius-sm);
    background: var(--asf-bg);
    color: var(--asf-text-muted);
    font-size: .875rem;
    cursor: pointer;
    transition: all var(--asf-transition);
    display: flex; align-items: center; justify-content: center;
}
.asf-page-btn:hover:not(:disabled) {
    border-color: var(--asf-accent);
    color: var(--asf-accent);
    background: var(--asf-accent-light);
}
.asf-page-btn.asf-current {
    background: var(--asf-accent);
    border-color: var(--asf-accent);
    color: #fff;
    font-weight: 600;
    cursor: default;
}
.asf-page-btn:disabled { opacity: .4; cursor: not-allowed; }
.asf-page-ellipsis {
    color: var(--asf-text-muted);
    padding: 0 4px;
    user-select: none;
}

/* ── Responsive ───────────────────────────────────────────── */

@media (max-width: 900px) {
    .asf-wrap {
        grid-template-columns: 1fr;
    }
    .asf-filter-panel { position: static; }
}

@media (max-width: 600px) {
    .asf-post-card {
        grid-template-columns: 1fr;
    }
    .asf-card-thumb { width: 100%; height: 160px; }
    .asf-meta-row {
        grid-template-columns: 1fr 1fr;
    }
}