.ami-sel-challenges-section {
    width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    background: linear-gradient(135deg, #000000 0%, #243D42 100%);
    padding: 80px 20px;
}

.sel-challenges-container {
    max-width: 1200px;
    margin: 0 auto;
}

.sel-challenges-header {
    text-align: center;
    margin-bottom: 50px;
}

.sel-challenges-header .section-heading {
    font-size: 42px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 16px 0;
    line-height: 1.2;
}

.sel-challenges-header .section-heading .highlight {
    color: #D0F45B;

}

.sel-challenges-header .section-subtitle {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.7);
    margin: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.sel-challenges-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

.sel-challenge-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 24px;
    transition: all 0.3s ease;
}

.sel-challenge-card:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-2px);
}

.challenge-section {
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.challenge-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.challenge-label .notice-icon {
    width: 18px;
    height: 18px;
    color: #EF4444;
}

.challenge-label span {
    font-size: 12px;
    font-weight: 600;
    color: #EF4444;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.challenge-name {
    font-size: 15px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.8);
    margin: 0;
    line-height: 1.4;
}

.solution-section {
}

.solution-label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.solution-label .check-icon {
    width: 18px;
    height: 18px;
    color: #D0F45B;
}

.solution-label span {
    font-size: 12px;
    font-weight: 600;
    color: #D0F45B;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.solution-title {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.solution-description {
    font-size: 13px;
    font-weight: 400;
    color: rgba(255, 255, 255, 0.6);
    margin: 0;
    line-height: 1.5;
}

.sel-challenges-bottom {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 20px;
}

.sel-challenge-card-last {
    height: 100%;
}

.sel-stats-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 40px;
    display: flex;
    align-items: center;
    justify-content: space-around;
}

.sel-stat-item {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 48px;
    font-weight: 800;
    color: #D0F45B;
    line-height: 1;
    margin-bottom: 8px;
}

.stat-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.7);
}

@media (max-width: 1024px) {
    .ami-sel-challenges-section {
        padding: 60px 20px;
    }
    
    .sel-challenges-header .section-heading {
        font-size: 36px;
    }
    
    .sel-challenges-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .sel-challenges-bottom {
        grid-template-columns: 1fr;
    }
    
    .sel-stats-card {
        padding: 30px 20px;
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .sel-stat-item {
        flex: 1 1 40%;
    }
    
    .stat-number {
        font-size: 40px;
    }
}

@media (max-width: 768px) {
    .ami-sel-challenges-section {
        padding: 50px 20px;
    }
    
    .sel-challenges-header {
        margin-bottom: 40px;
    }
    
    .sel-challenges-header .section-heading {
        font-size: 30px;
    }
    
    .sel-challenges-header .section-subtitle {
        font-size: 15px;
    }
    
    .sel-challenges-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .sel-challenge-card {
        padding: 20px;
    }
    
    .stat-number {
        font-size: 36px;
    }
    
    .stat-label {
        font-size: 12px;
    }
}

@media (max-width: 480px) {
    .sel-challenges-header .section-heading {
        font-size: 26px;
    }
    
    .sel-stats-card {
        padding: 24px 16px;
        gap: 16px;
    }
    
    .sel-stat-item {
        flex: 1 1 45%;
    }
    
    .stat-number {
        font-size: 32px;
    }
    
    .stat-label {
        font-size: 11px;
    }
}