/* ═══════════════════════════════════════════════
   YouTube Niche Finder — Page-Specific CSS
   ═══════════════════════════════════════════════ */

/* ── Category tabs ── */
.nf-cat-tab {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--color-gray-200, #e5e7eb);
    background: var(--color-white, #fff);
    color: var(--color-gray-600, #4b5563);
    font-size: var(--font-size-sm, 14px);
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms ease;
    white-space: nowrap;
}

.nf-cat-tab:hover {
    border-color: var(--color-primary, #4F46E5);
    color: var(--color-primary, #4F46E5);
}

.nf-cat-tab--active {
    background: var(--color-primary, #4F46E5);
    color: var(--color-white, #fff);
    border-color: var(--color-primary, #4F46E5);
}

/* ── Controls bar ── */
.nf-controls {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3, 12px);
    margin-bottom: var(--space-5, 20px);
}

.nf-search-wrap {
    flex: 1 1 280px;
    position: relative;
}

.nf-search-wrap .nf-search-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray-400, #9ca3af);
    font-size: var(--font-size-sm, 14px);
    pointer-events: none;
}

.nf-search {
    padding-left: 40px !important;
}

.nf-filter-group {
    flex: 0 0 auto;
    min-width: 150px;
}

.nf-filter-group label {
    display: block;
    font-size: var(--font-size-xs, 12px);
    font-weight: 600;
    color: var(--color-gray-500, #6b7280);
    margin-bottom: 4px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Quick filter chips ── */
.nf-chips {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2, 8px);
    margin-bottom: var(--space-4, 16px);
}

.nf-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid var(--color-gray-200, #e5e7eb);
    background: var(--color-white, #fff);
    color: var(--color-gray-700, #374151);
    font-size: var(--font-size-sm, 14px);
    cursor: pointer;
    transition: all 150ms ease;
    font-weight: 500;
}

.nf-chip:hover {
    border-color: var(--color-primary, #4F46E5);
    color: var(--color-primary, #4F46E5);
    background: var(--color-primary-50, #eef2ff);
}

.nf-chip.nf-chip--active {
    background: var(--color-primary, #4F46E5);
    color: var(--color-white, #fff);
    border-color: var(--color-primary, #4F46E5);
}

.nf-chip i {
    font-size: var(--font-size-xs, 12px);
}

/* ── Sort bar ── */
.nf-sort-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-3, 12px);
    margin-bottom: var(--space-4, 16px);
    flex-wrap: wrap;
}

.nf-result-count {
    font-size: var(--font-size-sm, 14px);
    color: var(--color-gray-500, #6b7280);
    font-weight: 500;
}

.nf-sort-options {
    display: flex;
    gap: var(--space-2, 8px);
    align-items: center;
}

.nf-sort-options label {
    font-size: var(--font-size-sm, 14px);
    color: var(--color-gray-500, #6b7280);
    font-weight: 500;
    white-space: nowrap;
}

/* ── Rising niches banner ── */
.nf-rising-section {
    margin-bottom: var(--space-5, 20px);
}

.nf-rising-title {
    display: flex;
    align-items: center;
    gap: var(--space-2, 8px);
    font-size: var(--font-size-base, 16px);
    font-weight: 700;
    color: var(--color-gray-900, #111827);
    margin-bottom: var(--space-3, 12px);
}

.nf-rising-title i {
    color: var(--color-danger, #ef4444);
}

.nf-rising-grid {
    display: flex;
    gap: var(--space-3, 12px);
    overflow-x: auto;
    padding-bottom: var(--space-2, 8px);
    -webkit-overflow-scrolling: touch;
}

.nf-rising-card {
    flex: 0 0 200px;
    padding: var(--space-3, 12px) var(--space-4, 16px);
    border-radius: 12px;
    border: 1px solid var(--color-gray-200, #e5e7eb);
    background: var(--color-white, #fff);
    cursor: pointer;
    transition: all 150ms ease;
}

.nf-rising-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md, 0 4px 6px rgba(0,0,0,0.07));
    border-color: var(--color-primary, #4F46E5);
}

.nf-rising-card-name {
    font-weight: 600;
    font-size: var(--font-size-sm, 14px);
    color: var(--color-gray-900, #111827);
    margin-bottom: 4px;
}

.nf-rising-card-trend {
    font-size: var(--font-size-xs, 12px);
    color: var(--color-success, #10b981);
    font-weight: 500;
}

/* ── Niche grid ── */
.nf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-4, 16px);
}

/* ── Niche card ── */
.nf-card {
    background: var(--color-white, #fff);
    border: 1px solid var(--color-gray-200, #e5e7eb);
    border-radius: 12px;
    padding: var(--space-5, 20px);
    transition: all 150ms ease;
    cursor: pointer;
    position: relative;
}

.nf-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md, 0 4px 6px rgba(0,0,0,0.07));
    border-color: var(--color-primary, #4F46E5);
}

.nf-card-header {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3, 12px);
    margin-bottom: var(--space-3, 12px);
}

.nf-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    flex-shrink: 0;
    background: var(--color-primary-50, #eef2ff);
    color: var(--color-primary, #4F46E5);
}

.nf-card-title-wrap {
    flex: 1;
    min-width: 0;
}

.nf-card-name {
    font-size: var(--font-size-base, 16px);
    font-weight: 700;
    color: var(--color-gray-900, #111827);
    margin: 0 0 2px;
    line-height: 1.3;
}

.nf-card-category {
    font-size: var(--font-size-xs, 12px);
    color: var(--color-gray-500, #6b7280);
}

/* ── Score badge ── */
.nf-score {
    position: absolute;
    top: 14px;
    right: 14px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: var(--font-size-sm, 14px);
    font-family: var(--font-display, 'Plus Jakarta Sans', sans-serif);
}

.nf-score--high {
    background: var(--color-success-bg, #dcfce7);
    color: var(--color-success-dark, #059669);
}

.nf-score--medium {
    background: var(--color-warning-bg, #fef9c3);
    color: var(--color-warning-dark, #b45309);
}

.nf-score--low {
    background: var(--color-danger-bg, #fee2e2);
    color: var(--color-danger-dark, #b91c1c);
}

/* ── Card metrics ── */
.nf-card-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-2, 8px);
    margin-bottom: var(--space-3, 12px);
}

.nf-metric {
    text-align: center;
    padding: var(--space-2, 8px) var(--space-1, 4px);
    background: var(--color-gray-50, #f9fafb);
    border-radius: 8px;
}

.nf-metric-value {
    display: block;
    font-weight: 700;
    font-size: var(--font-size-sm, 14px);
    color: var(--color-gray-900, #111827);
    font-family: var(--font-display, 'Plus Jakarta Sans', sans-serif);
}

.nf-metric-label {
    display: block;
    font-size: var(--font-size-xs, 12px);
    color: var(--color-gray-500, #6b7280);
    margin-top: 2px;
}

/* ── Card tags ── */
.nf-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--space-3, 12px);
}

.nf-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: var(--font-size-xs, 12px);
    font-weight: 500;
}

.nf-tag--faceless {
    background: var(--color-purple-bg, #ede9fe);
    color: var(--color-purple-text, #6d28d9);
}

.nf-tag--phone {
    background: var(--color-info-bg, #dbeafe);
    color: var(--color-info-dark, #1d4ed8);
}

.nf-tag--basic {
    background: var(--color-cyan-bg, #e0f2fe);
    color: var(--color-cyan-text, #0369a1);
}

.nf-tag--pro {
    background: var(--color-warning-bg, #fef3c7);
    color: var(--color-warning-dark, #92400e);
}

.nf-tag--rising {
    background: var(--color-success-bg, #dcfce7);
    color: var(--color-success-dark, #059669);
}

.nf-tag--stable {
    background: var(--color-gray-100, #f3f4f6);
    color: var(--color-gray-600, #4b5563);
}

/* ── Card expand (sub-niches) ── */
.nf-card-expand {
    font-size: var(--font-size-sm, 14px);
    color: var(--color-primary, #4F46E5);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
}

.nf-card-expand i {
    font-size: 12px;
    transition: transform 150ms ease;
}

.nf-card.nf-card--expanded .nf-card-expand i {
    transform: rotate(180deg);
}

/* ── Sub-niche panel ── */
.nf-subniche-panel {
    display: none;
    margin-top: var(--space-3, 12px);
    padding-top: var(--space-3, 12px);
    border-top: 1px solid var(--color-gray-200, #e5e7eb);
}

.nf-card--expanded .nf-subniche-panel {
    display: block;
}

.nf-subniche-title {
    font-size: var(--font-size-sm, 14px);
    font-weight: 600;
    color: var(--color-gray-700, #374151);
    margin-bottom: var(--space-2, 8px);
}

.nf-subniche-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.nf-subniche-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--color-gray-50, #f9fafb);
    border-radius: 8px;
    font-size: var(--font-size-sm, 14px);
}

.nf-subniche-name {
    font-weight: 500;
    color: var(--color-gray-800, #1f2937);
}

.nf-subniche-score {
    font-weight: 700;
    font-size: var(--font-size-xs, 12px);
    padding: 2px 8px;
    border-radius: 8px;
}

/* ── Example channels ── */
.nf-examples {
    margin-top: var(--space-2, 8px);
}

.nf-examples-label {
    font-size: var(--font-size-xs, 12px);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500, #6b7280);
    font-weight: 600;
    margin-bottom: 4px;
}

.nf-examples-list {
    font-size: var(--font-size-xs, 12px);
    color: var(--color-gray-600, #4b5563);
    line-height: 1.5;
}

/* ── Video formats ── */
.nf-formats {
    margin-top: var(--space-2, 8px);
}

.nf-formats-label {
    font-size: var(--font-size-xs, 12px);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500, #6b7280);
    font-weight: 600;
    margin-bottom: 4px;
}

.nf-format-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
}

.nf-format-chip {
    padding: 2px 8px;
    border-radius: 6px;
    font-size: var(--font-size-xs, 12px);
    background: var(--color-gray-100, #f3f4f6);
    color: var(--color-gray-600, #4b5563);
}

/* ── Empty state ── */
.nf-empty {
    text-align: center;
    padding: var(--space-12, 48px) var(--space-4, 16px);
    color: var(--color-gray-500, #6b7280);
}

.nf-empty i {
    font-size: 48px;
    margin-bottom: var(--space-3, 12px);
    color: var(--color-gray-300, #d1d5db);
}

.nf-empty h3 {
    font-size: var(--font-size-lg, 18px);
    color: var(--color-gray-700, #374151);
    margin-bottom: var(--space-2, 8px);
}

.nf-empty p {
    font-size: var(--font-size-sm, 14px);
}

/* ── Social proof ── */
.nf-social-proof {
    font-size: var(--font-size-sm, 14px);
    color: var(--color-gray-500, #6b7280);
    margin-top: var(--space-4, 16px);
    text-align: center;
}

.nf-social-proof i {
    color: var(--color-primary, #4F46E5);
    margin-right: 4px;
}

/* ── Competition badge colors ── */
.nf-comp--low { color: var(--color-success, #10b981); }
.nf-comp--medium { color: var(--color-warning, #f59e0b); }
.nf-comp--high { color: var(--color-danger, #ef4444); }

/* ═══════════════════════════════════════════════
   MOBILE
   ═══════════════════════════════════════════════ */
@media (max-width: 767px) {
    .nf-controls {
        flex-direction: column;
        gap: var(--space-2, 8px);
    }

    .nf-search-wrap {
        flex: 1 1 auto;
    }

    .nf-filter-group {
        min-width: 0;
        width: 100%;
    }

    .nf-filter-group select {
        width: 100%;
    }

    .nf-chips {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: var(--space-1, 4px);
    }

    .nf-chip {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .nf-grid {
        grid-template-columns: 1fr;
    }

    .nf-card {
        padding: var(--space-4, 16px);
    }

    .nf-card-metrics {
        grid-template-columns: repeat(3, 1fr);
        gap: 6px;
    }

    .nf-metric {
        padding: 6px 2px;
    }

    .nf-metric-value {
        font-size: var(--font-size-xs, 12px);
    }

    .nf-metric-label {
        font-size: var(--font-size-xs, 12px);
    }

    .nf-sort-bar {
        flex-direction: column;
        align-items: flex-start;
    }

    .nf-rising-card {
        flex: 0 0 170px;
    }

    .nf-score {
        width: 38px;
        height: 38px;
        font-size: var(--font-size-xs, 12px);
    }
}