/* Search & Filter Section */
.search-filter-section {
    max-width: 1200px;
    margin: -80px auto 60px;
    padding: 0 40px;
    animation: fadeInUp 0.8s ease-out 0.3s forwards;
    opacity: 0;
}

.search-bar {
    max-width: 520px;
    margin: 0 auto 32px;
    position: relative;
}

.search-bar input {
    width: 100%;
    padding: 14px 48px 14px 18px;
    border: 1px solid #E2E8F0;
    border-radius: 12px;
    font-size: 15px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    font-weight: 400;
    transition: all 0.2s ease;
    background: #FFFFFF;
    -webkit-appearance: none;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.search-bar input:focus {
    outline: none;
    border-color: #0F172A;
    box-shadow: 0 0 0 3px rgba(15, 23, 42, 0.08);
}

.search-bar input::placeholder {
    color: #94A3B8;
}

.search-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #64748B;
    font-size: 20px;
    pointer-events: none;
}

.filters {
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
    align-items: center;
}

.filter-divider {
    width: 1px;
    height: 24px;
    background: #E2E8F0;
    margin: 0 8px;
}

.filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 100px;
    color: #64748B;
    font-weight: 500;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.filter-btn i {
    font-size: 16px;
}

.filter-btn:hover {
    border-color: #CBD5E1;
    background: rgba(248, 250, 252, 0.95);
    color: #0F172A;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.1);
}

.filter-btn.active {
    background: #0F172A;
    color: #FFFFFF;
    border-color: #0F172A;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.25);
}

.filter-btn.active i {
    color: #FFFFFF;
}

/* Platform-only buttons (icon only) */
.filter-btn--platform {
    padding: 10px 12px;
    min-width: 42px;
    justify-content: center;
}

.filter-btn--platform i {
    font-size: 18px;
    margin: 0;
}

/* Platform hover & active = brand colors */
.filter-btn--platform.active,
.filter-btn--platform:hover {
    background: #FFFFFF;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

/* TikTok */
.filter-btn--platform[data-filter="tiktok"]:hover,
.filter-btn--platform[data-filter="tiktok"].active {
    border-color: #000000;
    color: #000000;
}

/* Instagram */
.filter-btn--platform[data-filter="instagram"]:hover,
.filter-btn--platform[data-filter="instagram"].active {
    border-color: #E4405F;
    color: #E4405F;
}

/* YouTube */
.filter-btn--platform[data-filter="youtube"]:hover,
.filter-btn--platform[data-filter="youtube"].active {
    border-color: #FF0000;
    color: #FF0000;
}

/* Snapchat */
.filter-btn--platform[data-filter="snapchat"]:hover,
.filter-btn--platform[data-filter="snapchat"].active {
    border-color: #FFFC00;
    background: #000000;
    color: #FFFC00;
}

/* X (Twitter) */
.filter-btn--platform[data-filter="x-twitter"]:hover,
.filter-btn--platform[data-filter="x-twitter"].active {
    border-color: #000000;
    color: #000000;
}

/* Facebook */
.filter-btn--platform[data-filter="facebook"]:hover,
.filter-btn--platform[data-filter="facebook"].active {
    border-color: #1877F2;
    color: #1877F2;
}

/* Twitch */
.filter-btn--platform[data-filter="twitch"]:hover,
.filter-btn--platform[data-filter="twitch"].active {
    border-color: #9146FF;
    color: #9146FF;
}

/* LinkedIn */
.filter-btn--platform[data-filter="linkedin"]:hover,
.filter-btn--platform[data-filter="linkedin"].active {
    border-color: #0A66C2;
    color: #0A66C2;
}

/* Pinterest */
.filter-btn--platform[data-filter="pinterest"]:hover,
.filter-btn--platform[data-filter="pinterest"].active {
    border-color: #E60023;
    color: #E60023;
}

.filter-btn--platform.active i,
.filter-btn--platform:hover i {
    color: inherit;
}

@media (max-width: 768px) {
    .filter-divider {
        display: none;
    }
    
    .filter-btn {
        padding: 8px 14px;
        font-size: 12px;
    }
    
    .filter-btn--platform {
        padding: 8px 10px;
        min-width: 38px;
    }
    
    .filter-btn--platform i {
        font-size: 16px;
    }
}

/* Empty States - Stylish & Cohesive */
.empty-state-challenges,
.no-results-search {
    grid-column: 1 / -1;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 80px 32px;
    background: linear-gradient(180deg, #FFFFFF 0%, #F8FAFC 100%);
    border: 1px solid #E2E8F0;
    border-radius: 20px;
    position: relative;
    overflow: hidden;
}

.empty-state-challenges::before,
.no-results-search::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(15, 23, 42, 0.03) 0%, transparent 70%);
    pointer-events: none;
}

.empty-state-icon {
    width: 88px;
    height: 88px;
    border-radius: 50%;
    background: linear-gradient(135deg, #FFFFFF 0%, #F1F5F9 100%);
    border: 1px solid #E2E8F0;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    position: relative;
    box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}

.empty-state-challenges .empty-state-icon {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    border-color: #A7F3D0;
}

.no-results-search .empty-state-icon {
    background: linear-gradient(135deg, #F0F9FF 0%, #E0F2FE 100%);
    border-color: #BAE6FD;
}

.empty-state-icon i {
    font-size: 38px;
    color: #64748B;
}

.empty-state-challenges .empty-state-icon i {
    color: #059669;
}

.no-results-search .empty-state-icon i {
    color: #0284C7;
}

.empty-state-challenges h3,
.no-results-search h3 {
    font-size: 22px;
    font-weight: 700;
    color: #0F172A;
    margin: 0 0 10px 0;
    letter-spacing: -0.02em;
}

.empty-state-challenges p,
.no-results-search p {
    font-size: 15px;
    color: #64748B;
    margin: 0 0 28px 0;
    max-width: 340px;
    line-height: 1.65;
}

.empty-state-challenges .btn-primary,
.no-results-search .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.empty-state-challenges .btn-primary {
    background: #0F172A;
    color: #FFFFFF;
    border: none;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.15);
}

.empty-state-challenges .btn-primary:hover {
    background: #1E293B;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(15, 23, 42, 0.2);
}

.no-results-search .btn-secondary {
    background: #FFFFFF;
    color: #334155;
    border: 1px solid #E2E8F0;
    box-shadow: 0 2px 6px rgba(15, 23, 42, 0.04);
}

.no-results-search .btn-secondary:hover {
    background: #F8FAFC;
    border-color: #CBD5E1;
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(15, 23, 42, 0.08);
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(20px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (max-width: 1024px) {
    .search-filter-section {
        padding: 0 32px;
    }
}

@media (max-width: 768px) {
    .search-filter-section {
        padding: 0 16px;
        margin: 0 auto 40px;
    }

    .search-bar {
        margin: 0 auto 20px;
    }

    .search-bar input {
        font-size: 16px;
        padding: 12px 44px 12px 16px;
        border-radius: 10px;
    }

    .search-icon {
        right: 14px;
        font-size: 18px;
    }

    .filters {
        gap: 8px;
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    
    .filters::-webkit-scrollbar {
        display: none;
    }

    .filter-btn {
        padding: 8px 14px;
        font-size: 12px;
        flex-shrink: 0;
        border-radius: 100px;
    }
    
    .filter-btn i {
        font-size: 14px;
    }
    
    .empty-state-challenges,
    .no-results-search {
        padding: 56px 24px;
        border-radius: 16px;
    }
    
    .empty-state-icon {
        width: 72px;
        height: 72px;
        margin-bottom: 20px;
    }
    
    .empty-state-icon i {
        font-size: 32px;
    }
    
    .empty-state-challenges h3,
    .no-results-search h3 {
        font-size: 18px;
    }
    
    .empty-state-challenges p,
    .no-results-search p {
        font-size: 14px;
        margin-bottom: 24px;
    }
    
    .empty-state-challenges .btn-primary,
    .no-results-search .btn-secondary {
        padding: 12px 24px;
        font-size: 13px;
        border-radius: 10px;
    }
}