/* ═══════════════════════════════════════════════════════════
   YouTube Trend Finder — Page-Specific CSS
   Layout and positioning only. Uses shared components.
   ═══════════════════════════════════════════════════════════ */

/* ── Social Proof ── */
.tf-social-proof {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin-top: var(--space-3);
}
.tf-social-proof i {
    color: var(--color-primary);
    margin-right: var(--space-1);
}

/* ── Search Section ── */
.tf-search {
    margin-bottom: var(--space-6);
}
.tf-search__title {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 0 0 var(--space-1) 0;
}
.tf-search__hint {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin: 0 0 var(--space-4) 0;
}

/* ── Niche Grid ── */
.tf-niche-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}
.tf-niche-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 10px 12px;
    border: 1px solid var(--color-gray-200);
    border-radius: 8px;
    background: var(--color-white, #fff);
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms ease;
    white-space: nowrap;
}
.tf-niche-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}
.tf-niche-btn--active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white, #fff);
}
.tf-niche-btn--active:hover {
    color: var(--color-white, #fff);
    background: var(--color-primary-dark);
}
.tf-niche-btn i {
    font-size: var(--font-size-base);
}

/* ── Custom Topic Row ── */
.tf-custom-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-3);
}
.tf-custom-row__or {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    white-space: nowrap;
    font-weight: 500;
}
.tf-custom-row__input-wrap {
    flex: 1;
}
.tf-search-btn {
    white-space: nowrap;
    padding: 10px 20px;
}

/* ── Filters ── */
.tf-filters {
    display: flex;
    gap: var(--space-3);
}
.tf-filter {
    flex: 1;
    margin-bottom: 0;
}
.tf-filter .form-control {
    font-size: var(--font-size-sm);
}

/* ── Loading ── */
.tf-loading {
    text-align: center;
    padding: var(--space-10) 0;
}
.tf-loading__spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-gray-200);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    margin: 0 auto var(--space-4);
    animation: tf-spin 0.8s linear infinite;
}
@keyframes tf-spin {
    to { transform: rotate(360deg); }
}
.tf-loading__text {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
}

/* ── Stats Bar ── */
.tf-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    padding: var(--space-4);
    background: var(--color-gray-50);
    border-radius: 10px;
}
.tf-stat {
    text-align: center;
}
.tf-stat__value {
    display: block;
    font-family: var(--font-display);
    font-size: 28px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}
.tf-stat__value--hot {
    color: var(--color-danger);
}
.tf-stat__label {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ── Tabs ── */
.tf-tabs {
    margin-bottom: var(--space-3);
}

/* ── Filter Bar ── */
.tf-filter-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-4);
    flex-wrap: wrap;
}
.tf-filter-bar__heat {
    display: flex;
    gap: var(--space-2);
}
.tf-heat-btn {
    padding: 6px 14px;
    border: 1px solid var(--color-gray-200);
    border-radius: 20px;
    background: var(--color-white, #fff);
    color: var(--color-gray-600);
    font-size: var(--font-size-sm);
    cursor: pointer;
    transition: all 150ms ease;
}
.tf-heat-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.tf-heat-btn--active {
    border-color: var(--color-primary);
    background: var(--color-primary);
    color: var(--color-white, #fff);
}
.tf-filter-bar__actions {
    display: flex;
    gap: var(--space-2);
}

/* ── Trend Card ── */
.tf-trend-card {
    display: flex;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    border: 1px solid var(--color-gray-200);
    border-radius: 10px;
    background: var(--color-white, #fff);
    margin-bottom: var(--space-2);
    transition: all 150ms ease;
}
.tf-trend-card:hover {
    border-color: var(--color-gray-300);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}
.tf-trend-card__rank {
    font-family: var(--font-display);
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--color-gray-300);
    min-width: 28px;
    text-align: center;
    padding-top: 2px;
}
.tf-trend-card__body {
    flex: 1;
    min-width: 0;
}
.tf-trend-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}
.tf-trend-card__topic {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 0;
    word-break: break-word;
}
.tf-trend-card__actions {
    display: flex;
    gap: var(--space-2);
    flex-shrink: 0;
}
.tf-trend-copy,
.tf-trend-yt {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid var(--color-gray-200);
    border-radius: 6px;
    background: var(--color-white, #fff);
    color: var(--color-gray-400);
    cursor: pointer;
    transition: all 150ms ease;
    font-size: var(--font-size-sm);
    text-decoration: none;
}
.tf-trend-copy:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}
.tf-trend-yt:hover {
    border-color: var(--color-brand-red, #FF0000);
    color: var(--color-brand-red, #FF0000);
}

/* ── Score Bar ── */
.tf-trend-card__score-row {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}
.tf-trend-card__bar-wrap {
    flex: 1;
    height: 6px;
    background: var(--color-gray-100);
    border-radius: 3px;
    overflow: hidden;
}
.tf-trend-card__bar {
    height: 100%;
    border-radius: 3px;
    transition: width 600ms ease;
}
.tf-trend-card__heat {
    font-size: var(--font-size-xs);
    font-weight: 600;
    white-space: nowrap;
}

/* ── Heat Colors ── */
.tf-heat--hot {
    color: var(--color-danger);
}
.tf-heat--hot.tf-trend-card__bar {
    background: var(--color-danger);
}
.tf-heat--rising {
    color: var(--color-warning);
}
.tf-heat--rising.tf-trend-card__bar {
    background: var(--color-warning);
}
.tf-heat--warm {
    color: var(--color-gray-400);
}
.tf-heat--warm.tf-trend-card__bar {
    background: var(--color-gray-400);
}

/* ── Angle Chips ── */
.tf-trend-card__angles {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-1);
}
.tf-angle-chip {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: 12px;
    background: var(--color-gray-50);
    color: var(--color-gray-600);
    font-size: var(--font-size-xs);
    font-weight: 500;
}
.tf-angle-chip i {
    font-size: var(--font-size-xs);
    color: var(--color-primary);
}

/* ── Cluster Card ── */
.tf-cluster-card {
    padding: var(--space-4);
    border: 1px solid var(--color-gray-200);
    border-radius: 10px;
    background: var(--color-white, #fff);
    margin-bottom: var(--space-3);
}
.tf-cluster-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-3);
}
.tf-cluster-card__name {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 0;
}
.tf-cluster-card__name i {
    color: var(--color-primary);
    margin-right: var(--space-1);
}
.tf-cluster-card__topics {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}
.tf-cluster-chip {
    padding: 6px 14px;
    border-radius: 20px;
    background: var(--color-gray-50);
    color: var(--color-gray-700);
    font-size: var(--font-size-sm);
    transition: all 150ms ease;
    cursor: default;
}
.tf-cluster-chip:hover {
    background: var(--color-gray-100);
}

/* ── Content Angles View ── */
.tf-angle-group {
    margin-bottom: var(--space-5);
}
.tf-angle-group__header h3 {
    font-family: var(--font-display);
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--color-gray-900);
    margin: 0 0 var(--space-1) 0;
}
.tf-angle-group__header h3 i {
    color: var(--color-primary);
    margin-right: var(--space-1);
}
.tf-angle-group__header p {
    font-size: var(--font-size-sm);
    color: var(--color-gray-500);
    margin: 0 0 var(--space-3) 0;
}
.tf-angle-group__list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}
.tf-angle-idea {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-gray-100);
    border-radius: 8px;
    background: var(--color-white, #fff);
    transition: all 150ms ease;
}
.tf-angle-idea:hover {
    border-color: var(--color-gray-200);
    box-shadow: var(--shadow-sm);
}
.tf-angle-idea__topic {
    font-size: var(--font-size-sm);
    color: var(--color-gray-800);
    font-weight: 500;
}
.tf-angle-idea__score {
    font-size: var(--font-size-xs);
    font-weight: 700;
    min-width: 28px;
    text-align: center;
}

/* ── No Results ── */
.tf-no-results {
    text-align: center;
    padding: var(--space-8) 0;
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

/* ── Fallback Toast ── */
.tf-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 12px 24px;
    border-radius: 8px;
    color: var(--color-white, #fff);
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: 10000;
    opacity: 0;
    transition: all 300ms ease;
    pointer-events: none;
}
.tf-toast--visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
.tf-toast--success { background: var(--color-success); }
.tf-toast--error { background: var(--color-danger); }
.tf-toast--warning { background: var(--color-warning); }

/* ═══════════════════════════════════════════════════════════
   RESPONSIVE — Mobile First (375px floor)
   ═══════════════════════════════════════════════════════════ */
@media (max-width: 767px) {
    .tf-niche-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: var(--space-1);
    }
    .tf-niche-btn {
        padding: 8px 6px;
        font-size: var(--font-size-xs);
        gap: var(--space-1);
    }
    .tf-niche-btn i {
        font-size: var(--font-size-sm);
    }
    .tf-custom-row {
        flex-direction: column;
        gap: var(--space-2);
    }
    .tf-custom-row__or {
        text-align: center;
    }
    .tf-search-btn {
        width: 100%;
    }
    .tf-filters {
        flex-direction: column;
        gap: var(--space-2);
    }
    .tf-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--space-2);
        padding: var(--space-3);
    }
    .tf-stat__value {
        font-size: 22px;
    }
    .tf-filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .tf-filter-bar__heat {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: var(--space-1);
    }
    .tf-filter-bar__actions {
        justify-content: stretch;
    }
    .tf-filter-bar__actions .button {
        flex: 1;
        text-align: center;
        font-size: var(--font-size-xs);
    }
    .tf-trend-card {
        padding: var(--space-3);
        gap: var(--space-2);
    }
    .tf-trend-card__rank {
        font-size: var(--font-size-base);
        min-width: 22px;
    }
    .tf-trend-card__topic {
        font-size: var(--font-size-sm);
    }
    .tf-trend-card__actions {
        gap: var(--space-1);
    }
    .tf-trend-copy,
    .tf-trend-yt {
        width: 44px;
        height: 44px;
        font-size: var(--font-size-base);
    }
    .tf-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    .tf-cluster-card {
        padding: var(--space-3);
    }
    .tf-angle-idea {
        padding: var(--space-2);
    }
}

@media (max-width: 480px) {
    .tf-niche-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}