.oxram-challenges-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    padding: 20px 0;
}

.challenge-card {
    background: rgba(45, 45, 65, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 20px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, background 0.3s ease;
}

.challenge-card:hover {
    transform: translateY(-5px);
    background: rgba(60, 60, 85, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.challenge-card.type-weekly {
    border-left: 4px solid #FFD700;
}

.challenge-card.type-daily {
    border-left: 4px solid #00D4FF;
}

.challenge-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.challenge-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: #fff;
    margin: 0;
}

.challenge-reward {
    background: rgba(76, 175, 80, 0.15);
    color: #81C784;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: bold;
    border: 1px solid rgba(76, 175, 80, 0.3);
}

.challenge-description {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-bottom: 20px;
    line-height: 1.4;
}

.challenge-progress-container {
    margin-top: auto;
}

.progress-bar-bg {
    background: rgba(255, 255, 255, 0.05);
    height: 8px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.progress-bar-fill {
    height: 100%;
    border-radius: 4px;
    transition: width 1s ease-out;
}

.type-weekly .progress-bar-fill {
    background: linear-gradient(90deg, #FFD700, #FFA500);
}

.type-daily .progress-bar-fill {
    background: linear-gradient(90deg, #00D4FF, #00A3FF);
}

.challenge-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
}

.challenge-status-completed {
    color: #4CAF50;
    font-weight: bold;
}