/* .aqi-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    padding: 20px;
    max-width: 100%;
    transition: transform 0.3s;
}

.aqi-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.15);
} */

.card-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
    padding-bottom: 12px;
    border-bottom: 2px solid #f0f0f0;
}

.card-title {
    font-size: 1rem;
    /* 16px → 1rem */
    font-weight: bold;
    color: #333;
    flex: 1;
}

.update-time {
    font-size: 0.6875rem;
    /* 11px → 0.6875rem */
    color: #999;
}

.aqi-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.aqi-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    flex-shrink: 0;
}

.aqi-value {
    font-size: 2rem;
    /* 32px → 2rem */
    font-weight: bold;
    line-height: 1;
}

.aqi-label {
    font-size: 0.625rem;
    /* 10px → 0.625rem */
    margin-top: 2px;
    opacity: 0.9;
}

.aqi-info {
    flex: 1;
    padding-left: 15px;
}

.status-text {
    font-size: 1.25rem;
    /* 20px → 1.25rem */
    font-weight: bold;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.city-name {
    font-size: 0.8125rem;
    /* 13px → 0.8125rem */
    color: #666;
    margin-bottom: 5px;
}

.description {
    font-size: 0.75rem;
    /* 12px → 0.75rem */
    color: #666;
    line-height: 1.5;
    padding: 12px;
    background: #f8f9fa;
    border-radius: 8px;
    border-left: 3px solid;
}

.loading {
    text-align: center;
    padding: 30px;
    color: #667eea;
    font-size: 0.875rem;
    /* 14px → 0.875rem */
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 10px;
}

@keyframes spin {
    0% {
        transform: rotate(0deg);
    }

    100% {
        transform: rotate(360deg);
    }
}

.error {
    text-align: center;
    padding: 20px;
    color: #e74c3c;
    font-size: 0.8125rem;
    /* 13px → 0.8125rem */
    background: #ffe6e6;
    border-radius: 8px;
}

@media (max-width: 300px) {
    .aqi-display {
        flex-direction: column;
        gap: 15px;
    }

    .aqi-info {
        padding-left: 0;
        text-align: center;
    }
}